diff options
Diffstat (limited to 'docs/apex/APEX-MyFirstPolicyExample.rst')
| -rw-r--r-- | docs/apex/APEX-MyFirstPolicyExample.rst | 2268 |
1 files changed, 2268 insertions, 0 deletions
diff --git a/docs/apex/APEX-MyFirstPolicyExample.rst b/docs/apex/APEX-MyFirstPolicyExample.rst new file mode 100644 index 00000000..52991add --- /dev/null +++ b/docs/apex/APEX-MyFirstPolicyExample.rst @@ -0,0 +1,2268 @@ +.. This work is licensed under a Creative Commons Attribution 4.0 International License. +.. http://creativecommons.org/licenses/by/4.0 + +.. _apex-myFirstExample: + +HowTo: My First Policy +********************** + +.. contents:: + :depth: 3 + +Introduction +^^^^^^^^^^^^ + + .. container:: sectionbody + + .. container:: paragraph + + Consider a scenario where a supermarket chain called + *HyperM* controls how it sells items in a policy-based + manner. Each time an item is processed by *HyperM*'s + point-of-sale (PoS) system an event is generated and + published about that item of stock being sold. This + event can then be used to update stock levels, etc.. + + .. container:: paragraph + + *HyperM* want to extend this approach to allow some + checks to be performed before the sale can be + completed. This can be achieved by requesting a + policy-controlled decision as each item is processed + by for sale by each PoS system. The decision process + is integrated with *HyperM*'s other IT systems that + manage stock control, sourcing and purchasing, + personnel systems, etc. + + .. container:: paragraph + + In this document we will show how APEX and APEX + Policies can be used to achieve this, starting with a + simple policy, building up to more complicated policy + that demonstrates the features of APEX. + +Data Models +^^^^^^^^^^^ + + .. container:: sectionbody + + .. container:: sect2 + + .. rubric:: Sales Decision Event + :name: sales_decision_event + + .. container:: paragraph + + Each time a PoS system processes a sales item an + event with the following format is emitted: + + .. table:: Table 1. Sale Input Event + + +----------------------+----------------------+-----------------------+ + | Event | Fields | Description | + +======================+======================+=======================+ + | SALE_INPUT | time, sale_ID, | Event indicating a | + | | amount, item_ID, | sale of an item is | + | | quantity, | occurring | + | | assistant_ID, | | + | | branch_ID, notes, … | | + +----------------------+----------------------+-----------------------+ + + .. container:: paragraph + + In each ``SALE_INPUT`` event the ``sale_ID`` field + is a unique ID generated by the PoS system. A + timestamp for the event is stored in the ``time`` + field. The ``amount`` field refers to the value of + the item(s) to be sold (in cents). The ``item_ID`` + field is a unique identifier for each item type, + and can be used to retrieve more information about + the item from *HyperM*'s stock control system. The + ``quantity`` field refers to the quantity of the + item to be sold. The ``assistant_ID`` field is a + unique identifier for the PoS operator, and can be + used to retrieve more information about the + operator from the *HyperM*'s personnel system. + Since *HyperM* has many branches the ``branch_ID`` + identifies the shop. The ``notes`` field contains + arbitrary notes about the sale. + + .. container:: sect2 + + .. rubric:: Sales Decision Event + :name: sales_decision_event + + .. container:: paragraph + + After a ``SALE_INPUT`` event is emitted by the PoS + system *HyperM*'s policy-based controlled sales + checking system emits a Sale Authorization Event + indicating whether the sale is authorized or + denied. The PoS system can then listen for this + event before continuing with the sale. + + .. table:: Table 2. Sale Authorisation Event + + +----------------------+----------------------+-----------------------+ + | Event | Fields | Description | + +======================+======================+=======================+ + | SALE_AUTH | sale_ID, time, | Event indicating a | + | | authorized, amount, | sale of an item is | + | | item_ID, quantity, | authorized or denied | + | | assistant_ID, | | + | | branch_ID, notes, | | + | | message… | | + +----------------------+----------------------+-----------------------+ + + .. container:: paragraph + + In each ``SALE_AUTH`` event the ``sale_ID`` field + is copied from the ``SALE_INPUT`` event that + trigger the decision request. The ``SALE_AUTH`` + event is also timestamped using the ``time`` field, + and a field called ``authorised`` is set to + ``true`` or ``false`` depending on whether the sale + is authorized or denied. The ``message`` field + carries an optional message about why a sale was + not authorized. The other fields from the + ``SALE_INPUT`` event are also included for + completeness. + + .. container:: sect2 + + .. rubric:: Stock Control: Items + :name: stock_control_items + + .. container:: paragraph + + *HyperM* maintains information about each item for + sale in a database table called ``ITEMS``. + + .. table:: Table 3. Items Database + + +----------------------+----------------------+-----------------------+ + | Table | Fields | Description | + +======================+======================+=======================+ + | ITEMS | item_ID, | Database table | + | | description, | describing each item | + | | cost_price, barcode, | for sale | + | | supplier_ID, | | + | | category, … | | + +----------------------+----------------------+-----------------------+ + + .. container:: paragraph + + The database table ``ITEMS`` has a row for each + items that *HyperM* sells. Each item is identified + by an ``item_ID`` value. The ``description`` field + stores a description of the item. The cost price of + the item is given in ``cost_price``. The barcode of + the item is encoded in ``barcode``, while the item + supplier is identified by ``supplier_ID``. Items + may also be classified into categories using the + ``category`` field. Useful categories might + include: ``soft drinks``, ``alcoholic drinks``, + ``cigarettes``, ``knives``, ``confectionery``, + ``bakery``, ``fruit&vegetables``, ``meat``, etc.. + + .. container:: sect2 + + .. rubric:: Personnel System: Assistants + :name: personnel_system_assistants + + .. table:: Table 4. Assistants Database + + +----------------------+----------------------+-----------------------+ + | Table | Fields | Description | + +======================+======================+=======================+ + | ASSISTANTS | assistant_ID, | Database table | + | | surname, firstname, | describing each | + | | middlename, age, | *HyperM* sales | + | | grade, phone_number, | assistant | + | | … | | + +----------------------+----------------------+-----------------------+ + + .. container:: paragraph + + The database table ``ASSISTANTS`` has a row for + each sales assistant employed by *HyperM*. Each + assistant is identified by an ``assistant_ID`` + value, with their name given in the ``firstname``, + ``middlename`` and ``surname`` fields. The + assistant’s age in years is given in ``age``, while + their phone number is contained in the + ``phone_number`` field. The assistant’s grade is + encoded in ``grade``. Useful values for ``grade`` + might include: ``trainee``, ``operator``, + ``supervisor``, etc.. + + .. container:: sect2 + + .. rubric:: Locations: Branches + :name: locations_branches + + .. table:: Table 5. Branches Database + + +----------------------+----------------------+-----------------------+ + | Table | Fields | Description | + +======================+======================+=======================+ + | BRANCHES | branch_ID, | Database table | + | | branch_Name, | describing each | + | | category, street, | *HyperM* branch | + | | city, country, | | + | | postcode, … | | + +----------------------+----------------------+-----------------------+ + + .. container:: paragraph + + *HyperM* operates a number of branches. Each branch + is described in the ``BRANCHES`` database table. + Each branch is identified by a ``branch_ID``, with + a branch name given in ``branch_Name``. The address + for the branch is encoded in ``street``, ``city``, + ``country`` and ``postcode``. The branch category + is given in the ``category`` field. Useful values + for ``category`` might include: ``Small``, + ``Large``, ``Super``, ``Hyper``, etc.. + + +Policy Step 1 +^^^^^^^^^^^^^ + + .. container:: sectionbody + + .. container:: sect1 + + .. rubric:: Scenario + :name: scenario + + .. container:: paragraph + + For the first version of our policy, let’s start + with something simple. Let us assume that there + exists some restriction that alcohol products + cannot be sold before 11:30am. In this section we + will go through the necessary steps to define a + policy that can enforce this for *HyperM*. + + .. container:: ulist + + - Alcohol cannot be sold before 11:30am... container:: + +New Policy Model +---------------- + + .. container:: sectionbody + + .. container:: sect1 + + .. rubric:: Create the an new empty Policy Model ``MyFirstPolicyModel`` + :name: create_the_an_new_empty_policy_model_code_myfirstpolicymodel_code + + .. container:: paragraph + + Since an organisation like *HyperM* may have many + policies covering many different domains, policies should + be grouped into policy sets. In order to edit or deploy a + policy, or policy set, the definition of the policy(ies) + and all required events, tasks, states, etc., are grouped + together into a 'Policy Model'. An organization might + define many Policy Models, each containing a different + set of policies. + + .. container:: paragraph + + So the first step is to create a new empty Policy Model + called ``MyFirstPolicyModel``. Using the APEX Policy + Editor, click on the 'File' menus and select 'New'. Then + define our new policy model called + ``MyFirstPolicyModel``. Use the 'Generate UUID' button to + create a new unique ID for the policy model, and fill in + a description for the policy model. Press the ``Submit`` + button to save your changes. + + .. container:: imageblock + + .. container:: content + + |File > New to create a new Policy Model| + + .. container:: imageblock + + .. container:: content + + |Create a new Policy Model| + +Events +------ + + .. container:: sectionbody + + .. container:: sect1 + + .. rubric:: Create the input event ``SALE_INPUT`` and the + output event ``SALE_AUTH`` + :name: create_the_input_event_code_sale_input_code_and_the_output_event_code_sale_auth_code + + .. container:: paragraph + + Using the APEX Policy Editor, click on the 'Events' tab. + In the 'Events' pane, right click and select 'New': + + .. container:: imageblock + + .. container:: content + + |Right click to create a new event| + + .. container:: paragraph + + Create a new event type called ``SALE_INPUT``. Use the + 'Generate UUID' button to create a new unique ID for the + event type, and fill in a description for the event. Add + a namespace, e.g. ``com.hyperm``. We can add hard-coded + strings for the ``Source`` and ``Target``, e.g. ``POS`` + and ``APEX``. At this stage we will not add any parameter + fields, we will leave this until later. Use the + ``Submit`` button to create the event. + + .. container:: imageblock + + .. container:: content + + |Fill in the necessary information for the + 'SALE_INPUT' event and click 'Submit'| + + .. container:: paragraph + + Repeat the same steps for a new event type called + ``SALE_AUTH``. Just use ``APEX`` as source and ``POS`` as + target, since this is the output event coming from APEX + going to the sales point. + + .. container:: paragraph + + Before we can add parameter fields to an event we must + first define APEX Context Item Schemas that can be used + by those fields. + + .. container:: paragraph + + To create new item schemas, click on the 'Context Item + Schemas' tab. In that 'Context Item Schemas' pane, right + click and select 'Create new ContextSchema'. + + .. container:: imageblock + + .. container:: content + + |Right click to create a new Item Schema| + + .. container:: paragraph + + Create item schemas with the following characteristics, + each with its own unique UUID: + + .. table:: Table 1. Item Schemas + + +-----------------+-----------------+-----------------+-----------------+ + | Name | Schema Flavour | Schema | Description | + | | | Definition | | + +=================+=================+=================+=================+ + | timestamp_type | Java | java.lang.Long | A type for | + | | | | ``time`` values | + +-----------------+-----------------+-----------------+-----------------+ + | sale_ID_type | Java | java.lang.Long | A type for | + | | | | ``sale_ID`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | price_type | Java | java.lang.Long | A type for | + | | | | ``amo | + | | | | unt``/``price`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | item_ID_type | Java | java.lang.Long | A type for | + | | | | ``item_ID`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | as | Java | java.lang.Long | A type for | + | sistant_ID_type | | | ` | + | | | | `assistant_ID`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | quantity_type | Java | ja | A type for | + | | | va.lang.Integer | ``quantity`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | branch_ID_type | Java | java.lang.Long | A type for | + | | | | ``branch_ID`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | notes_type | Java | j | A type for | + | | | ava.lang.String | ``notes`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | authorised_type | Java | ja | A type for | + | | | va.lang.Boolean | ``authorised`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + | message_type | Java | j | A type for | + | | | ava.lang.String | ``message`` | + | | | | values | + +-----------------+-----------------+-----------------+-----------------+ + + .. container:: imageblock + + .. container:: content + + |Create a new Item Schema| + + .. container:: paragraph + + The item schemas can now be seen on the 'Context Item + Schemas' tab, and can be updated at any time by + right-clicking on the item schemas on the 'Context Item + Schemas' tab. Now we can go back to the event definitions + for ``SALE_INPUT`` and ``SALE_AUTH`` and add some + parameter fields. + + .. container:: admonitionblock tip + + .. TIP:: + + .. container:: paragraph + + APEX natively supports schema definitions in ``Java`` and ``Avro``. + ``Java`` schema definitions are simply the name of a Java Class. There are some restrictions: + + .. container:: ulist + + - the class must be instantiatable, i.e. not an Java interface or abstract class + + - primitive types are not supported, i.e. use ``java.lang.Integer`` instead of ``int``, etc. + + - it must be possible to find the class, i.e. the class must be contained in the Java classpath. + + .. container:: paragraph + + ``Avro`` schema definitions can be any valid `Avro <https://avro.apac + he.org/docs/current/spec.html>`__ schema. For events using fields defined with + Avro schemas, any incoming event containing that field must contain a value that conforms to the Avro schema. + + .. container:: paragraph + + Click on the 'Events' tab, then right click the + ``SALE_INPUT`` row and select 'Edit Event + :literal:`SALE_INPUT’. To add a new event parameter use the 'Add Event Parameter' button at the bottom of the screen. For the `SALE_INPUT` + event add the following event parameters: + + .. table:: Table 2. Event Parameter Fields for the ``SALE_INPUT`` Event + + +----------------------+----------------------+-----------------------+ + | Parameter Name | Parameter Type | Optional | + +======================+======================+=======================+ + | time | timestamp_type | no | + +----------------------+----------------------+-----------------------+ + | sale_ID | sale_ID_type | no | + +----------------------+----------------------+-----------------------+ + | amount | price_type | no | + +----------------------+----------------------+-----------------------+ + | item_ID | item_ID_type | no | + +----------------------+----------------------+-----------------------+ + | quantity | quantity_type | no | + +----------------------+----------------------+-----------------------+ + | assistant_ID | assistant_ID_type | no | + +----------------------+----------------------+-----------------------+ + | branch_ID | branch_ID_type | no | + +----------------------+----------------------+-----------------------+ + | notes | notes_type | *yes* | + +----------------------+----------------------+-----------------------+ + + .. container:: paragraph + + Remember to click the 'Submit' button at the bottom of + the event definition pane. + + .. container:: admonitionblock tip + + .. TIP:: + + .. container:: paragraph + + Parameter fields can be *optional* in events. If a parameter is not marked as + *optional* then by default it is *mandatory*, so it must appear in any input event + passed to APEX. If an *optional* field is not set for an output event then value + will be set to ``null``. + + .. container:: imageblock + + .. container:: content + + |Add new event parameters to an event| + + .. container:: paragraph + + Select the ``SALE_AUTH`` event and add the following + event parameters: + + .. table:: Table 3. Event Parameter Fields for the ``SALE_AUTH`` Event + + +----------------------+----------------------+-----------------------+ + | Parameter Name | Parameter Type | no | + +======================+======================+=======================+ + | sale_ID | sale_ID_type | no | + +----------------------+----------------------+-----------------------+ + | time | timestamp_type | no | + +----------------------+----------------------+-----------------------+ + | authorised | authorised_type | no | + +----------------------+----------------------+-----------------------+ + | message | message_type | *yes* | + +----------------------+----------------------+-----------------------+ + | amount | price_type | no | + +----------------------+----------------------+-----------------------+ + | item_ID | item_ID_type | no | + +----------------------+----------------------+-----------------------+ + | assistant_ID | assistant_ID_type | no | + +----------------------+----------------------+-----------------------+ + | quantity | quantity_type | no | + +----------------------+----------------------+-----------------------+ + | branch_ID | branch_ID_type | no | + +----------------------+----------------------+-----------------------+ + | notes | notes_type | *yes* | + +----------------------+----------------------+-----------------------+ + + .. container:: paragraph + + Remember to click the 'Submit' button at the bottom of + the event definition pane. + + .. container:: paragraph + + The events for our policy are now defined. + +New Policy +---------- + + .. container:: sectionbody + + .. container:: sect1 + + .. rubric:: Create a new Policy and add the *"No Booze + before 11:30"* check + :name: create_a_new_policy_and_add_the_em_no_booze_before_11_30_em_check + + .. container:: paragraph + + APEX policies are defined using a state-machine model. + Each policy comprises one or more *states* that can be + individually executed. Where there is more than one + *state* the states are chained together to form a + `Directed Acyclic Graph + (DAG) <https://en.wikipedia.org/wiki/Directed_acyclic_graph>`__ + of states. A *state* is triggered by passing it a single + input (or 'trigger') event and once executed each state + then emits an output event. For each *state* the logic + for the *state* is embedded in one or more *tasks*. Each + *task* contains specific *task logic* that is executed by + the APEX execution environment each time the *task* is + invoked. Where there is more than one *task* in a *state* + then the *state* also defines some *task selection logic* + to select an appropriate task each time the *state* is + executed. + + .. container:: paragraph + + Therefore, to create a new policy we must first define + one or more tasks. + + .. container:: paragraph + + To create a new Task click on the 'Tasks' tab. In the + 'Tasks' pane, right click and select 'Create new Task'. + Create a new Task called ``MorningBoozeCheck``. Use the + 'Generate UUID' button to create a new unique ID for the + task, and fill in a description for the task. + + .. container:: imageblock + + .. container:: content + + |Right click to create a new task| + + .. container:: paragraph + + Tasks are configured with a set of *input fields* and a + set of *output fields*. To add new input/output fields + for a task use the 'Add Task Input Field' and 'Add Task + Output Field' button. The list of input and out fields to + add for the ``MorningBoozeCheck`` task are given below. + The input fields are drawn from the parameters in the + state’s input event, and the task’s output fields are + used to populate the state’s output event. The task’s + input and output fields must be a subset of the event + parameters defined for the input and output events for + any state that uses that task. (You may have noticed that + the input and output fields for the ``MorningBoozeCheck`` + task have the exact same names and reuse the item schemas + that we used for the parameters in the ``SALE_INPUT`` and + ``SALE_AUTH`` events respectively). + + .. table:: Table 1. Input fields for ``MorningBoozeCheck`` task + + +-----------------------------------+-----------------------------------+ + | Parameter Name | Parameter Type | + +===================================+===================================+ + | time | timestamp_type | + +-----------------------------------+-----------------------------------+ + | sale_ID | sale_ID_type | + +-----------------------------------+-----------------------------------+ + | amount | price_type | + +-----------------------------------+-----------------------------------+ + | item_ID | item_ID_type | + +-----------------------------------+-----------------------------------+ + | quantity | quantity_type | + +-----------------------------------+-----------------------------------+ + | assistant_ID | assistant_ID_type | + +-----------------------------------+-----------------------------------+ + | branch_ID | branch_ID_type | + +-----------------------------------+-----------------------------------+ + | notes | notes_type | + +-----------------------------------+-----------------------------------+ + + .. table:: Table 2. Output fields for ``MorningBoozeCheck`` task + + +-----------------------------------+-----------------------------------+ + | Parameter Name | Parameter Type | + +===================================+===================================+ + | sale_ID | sale_ID_type | + +-----------------------------------+-----------------------------------+ + | time | timestamp_type | + +-----------------------------------+-----------------------------------+ + | authorised | authorised_type | + +-----------------------------------+-----------------------------------+ + | message | message_type | + +-----------------------------------+-----------------------------------+ + | amount | price_type | + +-----------------------------------+-----------------------------------+ + | item_ID | item_ID_type | + +-----------------------------------+-----------------------------------+ + | assistant_ID | assistant_ID_type | + +-----------------------------------+-----------------------------------+ + | quantity | quantity_type | + +-----------------------------------+-----------------------------------+ + | branch_ID | branch_ID_type | + +-----------------------------------+-----------------------------------+ + | notes | notes_type | + +-----------------------------------+-----------------------------------+ + + .. container:: imageblock + + .. container:: content + + |Add input and out fields for the task| + + .. container:: paragraph + + Each task must include some 'Task Logic' that implements + the behaviour for the task. Task logic can be defined in + a number of different ways using a choice of languages. + For this task we will author the logic using the + Java-like scripting language called + ```MVEL`` <https://en.wikipedia.org/wiki/MVEL>`__. + + .. container:: paragraph + + For simplicity use the following code for the task logic. + Paste the script text into the 'Task Logic' box, and use + "MVEL" as the 'Task Logic Type / Flavour'. + + .. container:: paragraph + + This logic assumes that all items with ``item_ID`` + between 1000 and 2000 contain alcohol, which is not very + realistic, but we will see a better approach for this + later. It also uses the standard ``Java`` time utilities + to check if the current time is between ``00:00:00 GMT`` + and ``11:30:00 GMT``. For a detailed guide to how to + write your own logic in + ```JavaScript`` <https://en.wikipedia.org/wiki/JavaScript>`__, + ```MVEL`` <https://en.wikipedia.org/wiki/MVEL>`__ or one + of the other supported languages please refer to APEX + Programmers Guide. + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + import java.util.Date; + import java.util.Calendar; + import java.util.TimeZone; + import java.text.SimpleDateFormat; + + logger.info("Task Execution: '"+subject.id+"'. Input Fields: '"+inFields+"'"); + + outFields.put("amount" , inFields.get("amount")); + outFields.put("assistant_ID", inFields.get("assistant_ID")); + outFields.put("notes" , inFields.get("notes")); + outFields.put("quantity" , inFields.get("quantity")); + outFields.put("branch_ID" , inFields.get("branch_ID")); + outFields.put("item_ID" , inFields.get("item_ID")); + outFields.put("time" , inFields.get("time")); + outFields.put("sale_ID" , inFields.get("sale_ID")); + + item_id = inFields.get("item_ID"); + + //The events used later to test this task use GMT timezone! + gmt = TimeZone.getTimeZone("GMT"); + timenow = Calendar.getInstance(gmt); + df = new SimpleDateFormat("HH:mm:ss z"); + df.setTimeZone(gmt); + timenow.setTimeInMillis(inFields.get("time")); + + midnight = timenow.clone(); + midnight.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),0,0,0); + eleven30 = timenow.clone(); + eleven30.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),11,30,0); + + itemisalcohol = false; + if(item_id != null && item_id >=1000 && item_id < 2000) + itemisalcohol = true; + + if( itemisalcohol + && timenow.after(midnight) && timenow.before(eleven30)){ + outFields.put("authorised", false); + outFields.put("message", "Sale not authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())+ + ". Alcohol can not be sold between "+df.format(midnight.getTime())+ + " and "+df.format(eleven30.getTime())); + return true; + } + else{ + outFields.put("authorised", true); + outFields.put("message", "Sale authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())); + return true; + } + + /* + This task checks if a sale request is for an item that is an alcoholic drink. + If the local time is between 00:00:00 GMT and 11:30:00 GMT then the sale is not + authorised. Otherwise the sale is authorised. + In this implementation we assume that items with item_ID value between 1000 and + 2000 are all alcoholic drinks :-) + */ + + .. container:: imageblock + + .. container:: content + + |Add task logic the task| + + .. container:: paragraph + + An alternative version of the same logic is available in + JavaScript. Just use "JAVASCRIPT" as the 'Task Logic Type + / Flavour' instead. + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + + var returnValueType = Java.type("java.lang.Boolean"); + var returnValue = new returnValueType(true); + + // Load compatibility script for imports etc + load("nashorn:mozilla_compat.js"); + importPackage(java.text); + importClass(java.text.SimpleDateFormat); + + executor.logger.info("Task Execution: '"+executor.subject.id+"'. Input Fields: '"+executor.inFields+"'"); + + executor.outFields.put("amount" , executor.inFields.get("amount")); + executor.outFields.put("assistant_ID", executor.inFields.get("assistant_ID")); + executor.outFields.put("notes" , executor.inFields.get("notes")); + executor.outFields.put("quantity" , executor.inFields.get("quantity")); + executor.outFields.put("branch_ID" , executor.inFields.get("branch_ID")); + executor.outFields.put("item_ID" , executor.inFields.get("item_ID")); + executor.outFields.put("time" , executor.inFields.get("time")); + executor.outFields.put("sale_ID" , executor.inFields.get("sale_ID")); + + item_id = executor.inFields.get("item_ID"); + + //All times in this script are in GMT/UTC since the policy and events assume time is in GMT. + var timenow_gmt = new Date(Number(executor.inFields.get("time"))); + + var midnight_gmt = new Date(Number(executor.inFields.get("time"))); + midnight_gmt.setUTCHours(0,0,0,0); + + var eleven30_gmt = new Date(Number(executor.inFields.get("time"))); + eleven30_gmt.setUTCHours(11,30,0,0); + + var timeformatter = new java.text.SimpleDateFormat("HH:mm:ss z"); + + var itemisalcohol = false; + if(item_id != null && item_id >=1000 && item_id < 2000) + itemisalcohol = true; + + if( itemisalcohol + && timenow_gmt.getTime() >= midnight_gmt.getTime() + && timenow_gmt.getTime() < eleven30_gmt.getTime()) { + + executor.outFields.put("authorised", false); + executor.outFields.put("message", "Sale not authorised by policy task " + + executor.subject.taskName+ " for time " + timeformatter.format(timenow_gmt.getTime()) + + ". Alcohol can not be sold between " + timeformatter.format(midnight_gmt.getTime()) + + " and " + timeformatter.format(eleven30_gmt.getTime())); + } + else{ + executor.outFields.put("authorised", true); + executor.outFields.put("message", "Sale authorised by policy task " + + executor.subject.taskName + " for time "+timeformatter.format(timenow_gmt.getTime())); + } + + /* + This task checks if a sale request is for an item that is an alcoholic drink. + If the local time is between 00:00:00 GMT and 11:30:00 GMT then the sale is not + authorised. Otherwise the sale is authorised. + In this implementation we assume that items with item_ID value between 1000 and + 2000 are all alcoholic drinks :-) + */ + + .. container:: paragraph + + The task definition is now complete so click the 'Submit' + button to save the task. The task can now be seen on the + 'Tasks' tab, and can be updated at any time by + right-clicking on the task on the 'Task' tab. Now that we + have created our task, we can can create a policy that + uses that task. + + .. container:: paragraph + + To create a new Policy click on the 'Policies' tab. In + the 'Policies' pane, right click and select 'Create new + Policy': + + .. container:: paragraph + + Create a new Policy called ``MyFirstPolicy``. Use the + 'Generate UUID' button to create a new unique ID for the + policy, and fill in a description for the policy. Use + 'FREEFORM' as the 'Policy Flavour'. + + .. container:: paragraph + + Each policy must have at least one state. Since this is + 'freeform' policy we can add as many states as we wish. + Let’s start with one state. Add a new state called + ``BoozeAuthDecide`` to this ``MyFirstPolicy`` policy + using the 'Add new State' button after filling in the + name of our new state. + + .. container:: imageblock + + .. container:: content + + |Create a new policy| + + .. container:: paragraph + + Each state must uses one input event type. For this new + state select the ``SALE_INPUT`` event as the input event. + + .. container:: paragraph + + Each policy must define a 'First State' and a 'Policy + Trigger Event'. The 'Policy Trigger Event' is the input + event for the policy as a whole. This event is then + passed to the first state in the chain of states in the + policy, therefore the 'Policy Trigger Event' will be the + input event for the first state. Each policy can only + have one 'First State'. For our ``MyFirstPolicy`` policy, + select ``BoozeAuthDecide`` as the 'First State'. This + will automatically select ``SALE_INPUT`` as the 'Policy + Trigger Event' for our policy. + + .. container:: imageblock + + .. container:: content + + |Create a state| + + .. container:: paragraph + + In this case we will create a reference the pre-existing + ``MorningBoozeCheck`` task that we defined above using + the 'Add New Task' button. Select the + ``MorningBoozeCheck`` task, and use the name of the task + as the 'Local Name' for the task. + + .. container:: paragraph + + in the case where a state references more than one task, + a 'Default Task' must be selected for the state and some + logic ('Task Selection Logic') must be specified to + select the appropriate task at execution time. Since our + new state ``BoozeAuthDecide`` only has one task the + default task is automatically selected and no 'Task + Selection Logic' is required. + + .. container:: admonitionblock note + + .. NOTE:: + + .. container:: paragraph + In a 'Policy' 'State' a 'State Output Mapping' has 3 roles: 1) Select which 'State' + should be executed next, 2) Select the type of the state’s 'Outgoing Event', and + 3) Populate the state’s 'Outgoing Event'. This is how states are chained together + to form a (`Directed Acyclic Graph (DAG) <https://en.wikipedia.org/wiki/Directed_acyclic_graph>`__) + of states. The final state(s) of a policy are those that do not select any 'next' + state. Since a 'State' can only accept a single type of event, the type of the + event emitted by a previous 'State' must match the incoming event type of the next + 'State'. This is also how the last state(s) in a policy can emit events of + different types. The 'State Output Mapping' is also responsible for taking the + fields that are output by the task executed in the state and populating the + state’s output populating the state’s output event before it is emitted. + + Each 'Task' referenced in 'State' must have a defined 'Output Mapping' to take the output of the task, select an 'Outgoing Event' type for the state, populate the state's outgoing event, and then select the next state to be executed (if any). + + There are 2 basic types of output mappings: + + .. container:: olist arabic + + #. **Direct Output Mappings** have a single value for 'Next State' and a single value for 'State Output Event'. The outgoing event for the state is automatically created, any outgoing event parameters that were present in the incoming event are copied into the outgoing event, then any task output fields that have the same name and type as parameters in the outgoing event are automatically copied into the outgoing event. + #. **Logic-Based State Output Mappings / Finalizers** have some logic defined that dynamically selects and creates the 'State Outgoing Event', manages the population of the outgoing event parameters (perhaps changing or adding to the outputs from the task), and then dynamically selects the next state to be executed (if any). + + .. container:: paragraph + + Each task reference must also have an associated 'Output + State Mapping' so we need an 'Output State Mapping' for + the ``BoozeAuthDecide`` state to use when the + ``MorningBoozeCheck`` task is executed. The simplest type + of output mapping is a 'Direct Output Mapping'. + + .. container:: paragraph + + Create a new 'Direct Output Mapping' for the state called + ``MorningBoozeCheck_Output_Direct`` using the 'Add New + Direct State Output Mapping' button. Select ``SALE_AUTH`` + as the output event and select ``None`` for the next + state value. We can then select this output mapping for + use when the the ``MorningBoozeCheck`` task is executed. + Since there is only state, and only one task for that + state, this output mapping ensures that the + ``BoozeAuthDecide`` state is the only state executed and + the state (and the policy) can only emit events of type + ``SALE_AUTH``. (You may remember that the output fields + for the ``MorningBoozeCheck`` task have the exact same + names and reuse the item schemas that we used for the + parameters in ``SALE_AUTH`` event. The + ``MorningBoozeCheck_Output_Direct`` direct output mapping + can now automatically copy the values from the + ``MorningBoozeCheck`` task directly into outgoing + ``SALE_AUTH`` events.) + + .. container:: imageblock + + .. container:: content + + |Add a Task and Output Mapping| + + .. container:: paragraph + + Click the 'Submit' button to complete the definition of + our ``MyFirstPolicy`` policy. The policy + ``MyFirstPolicy`` can now be seen in the list of policies + on the 'Policies' tab, and can be updated at any time by + right-clicking on the policy on the 'Policies' tab. + + .. container:: paragraph + + The ``MyFirstPolicyModel``, including our + ``MyFirstPolicy`` policy can now be checked for errors. + Click on the 'Model' menu and select 'Validate'. The + model should validate without any 'Warning' or 'Error' + messages. If you see any 'Error' or 'Warning' messages, + carefully read the message as a hint to find where you + might have made a mistake when defining some aspect of + your policy model. + + .. container:: imageblock + + .. container:: content + + |Validate the policy model for error using the 'Model' + > 'Validate' menu item| + + .. container:: paragraph + + Congratulations, you have now completed your first APEX + policy. The policy model containing our new policy can + now be exported from the editor and saved. Click on the + 'File' menu and select 'Download' to save the policy + model in JSON format. The exported policy model is then + available in the directory you selected, for instance + ``$APEX_HOME/examples/models/MyFirstPolicy/1/MyFirstPolicyModel_0.0.1.json``. + The exported policy can now be loaded into the APEX + Policy Engine, or can be re-loaded and edited by the APEX + Policy Editor. + + .. container:: imageblock + + .. container:: content + + |Download the completed policy model using the 'File' + > 'Download' menu item| + +Test The Policy +--------------- + + .. container:: sectionbody + + .. container:: sect1 + + .. rubric:: Test Policy Step 1 + :name: test_policy_step_1 + + .. container:: paragraph + + To start a new APEX Engine you can use the following + configuration. In a full APEX installation you can find + this configuration in + ``$APEX_HOME/examples/config/MyFirstPolicy/1/MyFirstPolicyConfigStdin2StdoutJsonEvent.json``. + This configuration expects incoming events to be in + ``JSON`` format and to be passed into the APEX Engine + from ``stdin``, and result events will be printed in + ``JSON`` format to ``stdout``. This configuration loads + the policy model stored in the file + 'MyFirstPolicyModel_0.0.1.json' as exported from the APEX + Editor. Note, you may need to edit this file to provide + the full path to wherever you stored the exported policy + model file. + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + { + "engineServiceParameters" : { + "name" : "MyFirstPolicyApexEngine", + "version" : "0.0.1", + "id" : 101, + "instanceCount" : 4, + "deploymentPort" : 12345, + "policyModelFileName" : "examples/models/MyFirstPolicy/1/MyFirstPolicyModel_0.0.1.json", + "engineParameters" : { + "executorParameters" : { + "MVEL" : { + "parameterClassName" : "org.onap.policy.apex.plugins.executor.mvel.MVELExecutorParameters" + }, + "JAVASCRIPT" : { + "parameterClassName" : "org.onap.policy.apex.plugins.executor.javascript.JavascriptExecutorParameters" + } + } + } + }, + "eventOutputParameters": { + "FirstProducer": { + "carrierTechnologyParameters" : { + "carrierTechnology" : "FILE", + "parameters" : { + "standardIO" : true + } + }, + "eventProtocolParameters" : { + "eventProtocol" : "JSON" + } + } + }, + "eventInputParameters": { + "FirstConsumer": { + "carrierTechnologyParameters" : { + "carrierTechnology" : "FILE", + "parameters" : { + "standardIO" : true + } + }, + "eventProtocolParameters" : { + "eventProtocol" : "JSON" + } + } + } + } + + .. container:: paragraph + + To test the policy try paste the following events into + the console as the APEX engine executes: + + .. list-table:: Title + :widths: 25 40 35 + :header-rows: 1 + + * - Input Event (JSON) + - Output Event (JSON) + - comment + * - .. literalinclude:: events/1/EventIn_NonBoozeItem_101309GMT.json + :language: JSON + - .. literalinclude:: events/1/EventOut_NonBoozeItem_101309GMT.json + :language: JSON + - .. container:: paragraph + + Request to buy a non-alcoholic item (item_ID=5123) at 10:13:09 on Tuesday, 10 January 2017. + Sale is authorized. + * - .. literalinclude:: events/1/EventIn_BoozeItem_084106GMT.json + :language: JSON + - .. literalinclude:: events/1/EventOut_BoozeItem_084106GMT.json + :language: JSON + - .. container:: paragraph + + Request to buy alcohol item (`item_ID=1249`) at _08:41:06_ on _Monday, 02 January 2017_. + Sale is not authorized. + * - .. literalinclude:: events/1/EventIn_BoozeItem_201713GMT.json + :language: JSON + - .. literalinclude:: events/1/EventOut_BoozeItem_201713GMT.json + :language: JSON + - .. container:: paragraph + + Request to buy alcohol (`item_ID=1943`) at _20:17:13_ on _Tuesday, 20 December 2016_. + Sale is authorized. + + +CLI Editor File +--------------- + + .. container:: sectionbody + + .. container:: sect1 + + .. rubric:: Policy 1 in CLI Editor + :name: policy_1_in_cli_editor + + .. container:: paragraph + + An equivalent version of the ``MyFirstPolicyModel`` + policy model can again be generated using the APEX CLI + editor. A sample APEX CLI script is shown below: + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + #------------------------------------------------------------------------------- + # ============LICENSE_START======================================================= + # Copyright (C) 2016-2018 Ericsson. All rights reserved. + # ================================================================================ + # Licensed under the Apache License, Version 2.0 (the "License"); + # you may not use this file except in compliance with the License. + # You may obtain a copy of the License at + # + # http://www.apache.org/licenses/LICENSE-2.0 + # + # Unless required by applicable law or agreed to in writing, software + # distributed under the License is distributed on an "AS IS" BASIS, + # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + # See the License for the specific language governing permissions and + # limitations under the License. + # + # SPDX-License-Identifier: Apache-2.0 + # ============LICENSE_END========================================================= + #------------------------------------------------------------------------------- + + model create name=MyFirstPolicyModel version=0.0.1 uuid=540226fb-55ee-4f0e-a444-983a0494818e description="This is my first Apex Policy Model." + + schema create name=assistant_ID_type version=0.0.1 uuid=36df4c71-9616-4206-8b53-976a5cd4bd87 description="A type for 'assistant_ID' values" flavour=Java schema=java.lang.Long + + schema create name=authorised_type version=0.0.1 uuid=d48b619e-d00d-4008-b884-02d76ea4350b description="A type for 'authorised' values" flavour=Java schema=java.lang.Boolean + + schema create name=branch_ID_type version=0.0.1 uuid=6468845f-4122-4128-8e49-0f52c26078b5 description="A type for 'branch_ID' values" flavour=Java schema=java.lang.Long + + schema create name=item_ID_type version=0.0.1 uuid=4f227ff1-aee0-453a-b6b6-9a4b2e0da932 description="A type for 'item_ID' values" flavour=Java schema=java.lang.Long + + schema create name=message_type version=0.0.1 uuid=ad1431bb-3155-4e73-b5a3-b89bee498749 description="A type for 'message' values" flavour=Java schema=java.lang.String + + schema create name=notes_type version=0.0.1 uuid=eecfde90-896c-4343-8f9c-2603ced94e2d description="A type for 'notes' values" flavour=Java schema=java.lang.String + + schema create name=price_type version=0.0.1 uuid=52c2fc45-fd8c-463c-bd6f-d91b0554aea7 description="A type for 'amount'/'price' values" flavour=Java schema=java.lang.Long + + schema create name=quantity_type version=0.0.1 uuid=ac3d9842-80af-4a98-951c-bd79a431c613 description="A type for 'quantity' values" flavour=Java schema=java.lang.Integer + + schema create name=sale_ID_type version=0.0.1 uuid=cca47d74-7754-4a61-b163-ca31f66b157b description="A type for 'sale_ID' values" flavour=Java schema=java.lang.Long + + schema create name=timestamp_type version=0.0.1 uuid=fd594e88-411d-4a94-b2be-697b3a0d7adf description="A type for 'time' values" flavour=Java schema=java.lang.Long + + task create name=MorningBoozeCheck version=0.0.1 uuid=3351b0f4-cf06-4fa2-8823-edf67bd30223 description=LS + This task checks if the sales request is for an item that contains alcohol. + If the local time is between 00:00:00 and 11:30:00 then the sale is not authorised. Otherwise the sale is authorised. + In this implementation we assume that all items with item_ID values between 1000 and 2000 contain alcohol :-) + LE + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=amount schemaName=price_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=quantity schemaName=quantity_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=time schemaName=timestamp_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=amount schemaName=price_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=quantity schemaName=quantity_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=authorised schemaName=authorised_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=time schemaName=timestamp_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=message schemaName=message_type schemaVersion=0.0.1 optional=true + task logic create name=MorningBoozeCheck version=0.0.1 logicFlavour=MVEL logic=LS + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + import java.util.Date; + import java.util.Calendar; + import java.util.TimeZone; + import java.text.SimpleDateFormat; + + logger.info("Task Execution: '"+subject.id+"'. Input Fields: '"+inFields+"'"); + + outFields.put("amount" , inFields.get("amount")); + outFields.put("assistant_ID", inFields.get("assistant_ID")); + outFields.put("notes" , inFields.get("notes")); + outFields.put("quantity" , inFields.get("quantity")); + outFields.put("branch_ID" , inFields.get("branch_ID")); + outFields.put("item_ID" , inFields.get("item_ID")); + outFields.put("time" , inFields.get("time")); + outFields.put("sale_ID" , inFields.get("sale_ID")); + + item_id = inFields.get("item_ID"); + + //The events used later to test this task use GMT timezone! + gmt = TimeZone.getTimeZone("GMT"); + timenow = Calendar.getInstance(gmt); + df = new SimpleDateFormat("HH:mm:ss z"); + df.setTimeZone(gmt); + timenow.setTimeInMillis(inFields.get("time")); + + midnight = timenow.clone(); + midnight.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),0,0,0); + eleven30 = timenow.clone(); + eleven30.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),11,30,0); + + itemisalcohol = false; + if(item_id != null && item_id >=1000 && item_id < 2000) + itemisalcohol = true; + + if( itemisalcohol + && timenow.after(midnight) && timenow.before(eleven30)){ + outFields.put("authorised", false); + outFields.put("message", "Sale not authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())+ + ". Alcohol can not be sold between "+df.format(midnight.getTime())+ + " and "+df.format(eleven30.getTime())); + return true; + } + else{ + outFields.put("authorised", true); + outFields.put("message", "Sale authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())); + return true; + } + + /* + This task checks if a sale request is for an item that is an alcoholic drink. + If the local time is between 00:00:00 GMT and 11:30:00 GMT then the sale is not + authorised. Otherwise the sale is authorised. + In this implementation we assume that items with item_ID value between 1000 and + 2000 are all alcoholic drinks :-) + */ + LE + + event create name=SALE_AUTH version=0.0.1 uuid=c4500941-3f98-4080-a9cc-5b9753ed050b description="An event emitted by the Policy to indicate whether the sale of an item has been authorised" nameSpace=com.hyperm source="APEX" target="POS" + event parameter create name=SALE_AUTH version=0.0.1 parName=amount schemaName=price_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=authorised schemaName=authorised_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=message schemaName=message_type schemaVersion=0.0.1 optional=true + event parameter create name=SALE_AUTH version=0.0.1 parName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + event parameter create name=SALE_AUTH version=0.0.1 parName=quantity schemaName=quantity_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=time schemaName=timestamp_type schemaVersion=0.0.1 + + event create name=SALE_INPUT version=0.0.1 uuid=4f04aa98-e917-4f4a-882a-c75ba5a99374 description="An event raised by the PoS system each time an item is scanned for purchase" nameSpace=com.hyperm source="POS" target="APEX" + event parameter create name=SALE_INPUT version=0.0.1 parName=amount schemaName=price_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + event parameter create name=SALE_INPUT version=0.0.1 parName=quantity schemaName=quantity_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=time schemaName=timestamp_type schemaVersion=0.0.1 + + + policy create name=MyFirstPolicy version=0.0.1 uuid=6c5e410f-489a-46ff-964e-982ce6e8b6d0 description="This is my first Apex policy. It checks if a sale should be authorised or not." template=FREEFORM firstState=BoozeAuthDecide + policy state create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide triggerName=SALE_INPUT triggerVersion=0.0.1 defaultTaskName=MorningBoozeCheck defaultTaskVersion=0.0.1 + policy state output create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide outputName=MorningBoozeCheck_Output_Direct eventName=SALE_AUTH eventVersion=0.0.1 nextState=NULL + policy state taskref create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide taskLocalName=MorningBoozeCheck taskName=MorningBoozeCheck taskVersion=0.0.1 outputType=DIRECT outputName=MorningBoozeCheck_Output_Direct + +Policy Step 2 +^^^^^^^^^^^^^ + + .. container:: sectionbody + + .. container:: sect1 + + .. rubric:: Scenario + :name: scenario + + .. container:: paragraph + + *HyperM* have just opened a new branch in a + different country, but that country has different + rules about when alcohol can be sold! In this + section we will go through the necessary steps to + extend our policy to enforce this for *HyperM*. + + .. container:: ulist + + - In some branches alcohol cannot be sold before + 1pm, and not at all on Sundays. + + .. container:: paragraph + + Although there are a number of ways to accomplish + this the easiest approach for us is to define + another task and then select which task is + appropriate at runtime depending on the branch + identifier in the incoming event. + +Extend Policy Model +------------------- + + .. container:: sectionbody + + .. container:: sect2 + + .. rubric:: Extend the Policy with the new Scenario + :name: extend_the_policy_with_the_new_scenario + + .. container:: paragraph + + To create a new Task click on the 'Tasks' tab. In the + 'Tasks' pane, right click and select 'Create new Task': + + .. container:: paragraph + + Create a new Task called ``MorningBoozeCheckAlt1``. Use + the 'Generate UUID' button to create a new unique ID for + the task, and fill in a description for the task. Select + the same input and output fields that we used earlier + when we defined the ``MorningBoozeCheck`` task earlier. + + .. table:: Table 1. Input fields for + ``MorningBoozeCheckAlt1`` task + + +-----------------------------------+-----------------------------------+ + | Parameter Name | Parameter Type | + +===================================+===================================+ + | time | timestamp_type | + +-----------------------------------+-----------------------------------+ + | sale_ID | sale_ID_type | + +-----------------------------------+-----------------------------------+ + | amount | price_type | + +-----------------------------------+-----------------------------------+ + | item_ID | item_ID_type | + +-----------------------------------+-----------------------------------+ + | quantity | quantity_type | + +-----------------------------------+-----------------------------------+ + | assistant_ID | assistant_ID_type | + +-----------------------------------+-----------------------------------+ + | branch_ID | branch_ID_type | + +-----------------------------------+-----------------------------------+ + | notes | notes_type | + +-----------------------------------+-----------------------------------+ + + .. table:: Table 2. Output fields for + ``MorningBoozeCheckAlt1`` task + + +-----------------------------------+-----------------------------------+ + | Parameter Name | Parameter Type | + +===================================+===================================+ + | sale_ID | sale_ID_type | + +-----------------------------------+-----------------------------------+ + | time | timestamp_type | + +-----------------------------------+-----------------------------------+ + | authorised | authorised_type | + +-----------------------------------+-----------------------------------+ + | message | message_type | + +-----------------------------------+-----------------------------------+ + | amount | price_type | + +-----------------------------------+-----------------------------------+ + | item_ID | item_ID_type | + +-----------------------------------+-----------------------------------+ + | assistant_ID | assistant_ID_type | + +-----------------------------------+-----------------------------------+ + | quantity | quantity_type | + +-----------------------------------+-----------------------------------+ + | branch_ID | branch_ID_type | + +-----------------------------------+-----------------------------------+ + | notes | notes_type | + +-----------------------------------+-----------------------------------+ + + .. container:: paragraph + + This task also requires some 'Task Logic' to implement + the new behaviour for this task. + + .. container:: paragraph + + For simplicity use the following code for the task logic. + It again assumes that all items with ``item_ID`` between + 1000 and 2000 contain alcohol. We again use the standard + ``Java`` time utilities to check if the current time is + between ``00:00:00 CET`` and ``13:00:00 CET`` or if it is + ``Sunday``. + + .. container:: paragraph + + For this task we will again author the logic using the + ```MVEL`` <https://en.wikipedia.org/wiki/MVEL>`__ + scripting language. Sample task logic code (specified in + ```MVEL`` <https://en.wikipedia.org/wiki/MVEL>`__) is + given below. For a detailed guide to how to write your + own logic in + ```JavaScript`` <https://en.wikipedia.org/wiki/JavaScript>`__, + ```MVEL`` <https://en.wikipedia.org/wiki/MVEL>`__ or one + of the other supported languages please refer to APEX + Programmers Guide. + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + import java.util.Date; + import java.util.Calendar; + import java.util.TimeZone; + import java.text.SimpleDateFormat; + + logger.info("Task Execution: '"+subject.id+"'. Input Event: '"+inFields+"'"); + + outFields.put("amount" , inFields.get("amount")); + outFields.put("assistant_ID", inFields.get("assistant_ID")); + outFields.put("notes" , inFields.get("notes")); + outFields.put("quantity" , inFields.get("quantity")); + outFields.put("branch_ID" , inFields.get("branch_ID")); + outFields.put("item_ID" , inFields.get("item_ID")); + outFields.put("time" , inFields.get("time")); + outFields.put("sale_ID" , inFields.get("sale_ID")); + + item_id = inFields.get("item_ID"); + + //The events used later to test this task use CET timezone! + cet = TimeZone.getTimeZone("CET"); + timenow = Calendar.getInstance(cet); + df = new SimpleDateFormat("HH:mm:ss z"); + df.setTimeZone(cet); + timenow.setTimeInMillis(inFields.get("time")); + + midnight = timenow.clone(); + midnight.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),0,0,0); + onepm = timenow.clone(); + onepm.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),13,0,0); + + itemisalcohol = false; + if(item_id != null && item_id >=1000 && item_id < 2000) + itemisalcohol = true; + + if( itemisalcohol && + ( (timenow.after(midnight) && timenow.before(onepm)) + || + (timenow.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) + )){ + outFields.put("authorised", false); + outFields.put("message", "Sale not authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())+ + ". Alcohol can not be sold between "+df.format(midnight.getTime())+ + " and "+df.format(onepm.getTime()) +" or on Sunday"); + return true; + } + else{ + outFields.put("authorised", true); + outFields.put("message", "Sale authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())); + return true; + } + + /* + This task checks if a sale request is for an item that is an alcoholic drink. + If the local time is between 00:00:00 CET and 13:00:00 CET then the sale is not authorised. + Also alcohol sales are not allowed on Sundays. Otherwise the sale is authorised. + In this implementation we assume that items with item_ID between 1000 and 2000 are all alcoholic drinks :-) + */ + + .. container:: imageblock + + .. container:: content + + |Create a new alternative task + \`MorningBoozeCheckAlt1\`| + + .. container:: paragraph + + The task definition is now complete so click the 'Submit' + button to save the task. Now that we have created our + task, we can can add this task to the single pre-existing + state (``BoozeAuthDecide``) in our policy. + + .. container:: paragraph + + To edit the ``BoozeAuthDecide`` state in our policy click + on the 'Policies' tab. In the 'Policies' pane, right + click on our ``MyFirstPolicy`` policy and select 'Edit'. + Navigate to the ``BoozeAuthDecide`` state in the 'states' + section at the bottom of the policy definition pane. + + .. container:: imageblock + + .. container:: content + + |Right click to edit a policy| + + .. container:: paragraph + + To add our new task ``MorningBoozeCheckAlt1``, scroll + down to the ``BoozeAuthDecide`` state in the 'States' + section. In the 'State Tasks' section for + ``BoozeAuthDecide`` use the 'Add new task' button. Select + our new ``MorningBoozeCheckAlt1`` task, and use the name + of the task as the 'Local Name' for the task. The + ``MorningBoozeCheckAlt1`` task can reuse the same + ``MorningBoozeCheck_Output_Direct`` 'Direct State Output + Mapping' that we used for the ``MorningBoozeCheck`` task. + (Recall that the role of the 'State Output Mapping' is to + select the output event for the state, and select the + next state to be executed. These both remain the same as + before.) + + .. container:: paragraph + + Since our state has more than one task we must define + some logic to determine which task should be used each + time the state is executed. This *task selection logic* + is defined in the state definition. For our + ``BoozeAuthDecide`` state we want the choice of which + task to use to be based on the ``branch_ID`` from which + the ``SALE_INPUT`` event originated. For simplicity sake + let us assume that branches with ``branch_ID`` between + ``0`` and ``999`` should use the ``MorningBoozeCheck`` + task, and the branches with with ``branch_ID`` between + ``1000`` and ``1999`` should use the + ``MorningBoozeCheckAlt1`` task. + + .. container:: paragraph + + This time, for variety, we will author the task selection + logic using the + ```JavaScript`` <https://en.wikipedia.org/wiki/JavaScript>`__ + scripting language. Sample task selection logic code + (specified in + ```JavaScript`` <https://en.wikipedia.org/wiki/JavaScript>`__) + is given below. Paste the script text into the 'Task + Selection Logic' box, and use "JAVASCRIPT" as the 'Task + Selection Logic Type / Flavour'. It is necessary to mark + one of the tasks as the 'Default Task' so that the task + selection logic always has a fallback default option in + cases where a particular task cannot be selected. In this + case the ``MorningBoozeCheck`` task can be the default + task. + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + + + var returnValueType = Java.type("java.lang.Boolean"); + var returnValue = new returnValueType(true); + + executor.logger.info("Task Selection Execution: '"+executor.subject.id+ + "'. Input Event: '"+executor.inFields+"'"); + + branchid = executor.inFields.get("branch_ID"); + taskorig = executor.subject.getTaskKey("MorningBoozeCheck"); + taskalt = executor.subject.getTaskKey("MorningBoozeCheckAlt1"); + taskdef = executor.subject.getDefaultTaskKey(); + + if(branchid >=0 && branchid <1000){ + taskorig.copyTo(executor.selectedTask); + } + else if (branchid >=1000 && branchid <2000){ + taskalt.copyTo(executor.selectedTask); + } + else{ + taskdef.copyTo(executor.selectedTask); + } + + /* + This task selection logic selects task "MorningBoozeCheck" for branches with + 0<=branch_ID<1000 and selects task "MorningBoozeCheckAlt1" for branches with + 1000<=branch_ID<2000. Otherwise the default task is selected. + In this case the default task is also "MorningBoozeCheck" + */ + + .. container:: imageblock + + .. container:: content + + |State definition with 2 Tasks and Task Selection + Logic| + + .. container:: paragraph + + When complete don’t forget to click the 'Submit' button + at the bottom of 'Policies' pane for our + ``MyFirstPolicy`` policy after updating the + ``BoozeAuthDecide`` state. + + .. container:: paragraph + + Congratulations, you have now completed the second step + towards your first APEX policy. The policy model + containing our new policy can again be validated and + exported from the editor and saved as shown in Step 1. + + .. container:: paragraph + + The exported policy model is then available in the + directory you selected, as + `MyFirstPolicyModel_0.0.1.json <files/mfp-files/2/MyFirstPolicyModel_0.0.1.json>`__. + The exported policy can now be loaded into the APEX + Policy Engine, or can be re-loaded and edited by the APEX + Policy Editor. + +Test The Policy +--------------- + + .. container:: sectionbody + + .. container:: sect2 + + .. rubric:: Test Policy Step 2 + :name: test_policy_step_2 + + .. container:: paragraph + + To start a new APEX Engine you can use the following + configuration. In a full APEX installation you can find + this configuration in + ``$APEX_HOME/examples/config/MyFirstPolicy/2/MyFirstPolicyConfigStdin2StdoutJsonEvent.json``. + Note, this has changed from the configuration file in + Step 1 to enable the ``JAVASCRIPT`` executor for our new + 'Task Selection Logic'. + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + { + "engineServiceParameters" : { + "name" : "MyFirstPolicyApexEngine", + "version" : "0.0.1", + "id" : 102, + "instanceCount" : 4, + "deploymentPort" : 12345, + "policyModelFileName" : "examples/models/MyFirstPolicy/2/MyFirstPolicyModel_0.0.1.json", + "engineParameters" : { + "executorParameters" : { + "MVEL" : { + "parameterClassName" : "org.onap.policy.apex.plugins.executor.mvel.MVELExecutorParameters" + }, + "JAVASCRIPT" : { + "parameterClassName" : "org.onap.policy.apex.plugins.executor.javascript.JavascriptExecutorParameters" + } + } + } + }, + "eventOutputParameters": { + "FirstProducer": { + "carrierTechnologyParameters" : { + "carrierTechnology" : "FILE", + "parameters" : { + "standardIO" : true + } + }, + "eventProtocolParameters" : { + "eventProtocol" : "JSON" + } + } + }, + "eventInputParameters": { + "FirstConsumer": { + "carrierTechnologyParameters" : { + "carrierTechnology" : "FILE", + "parameters" : { + "standardIO" : true + } + }, + "eventProtocolParameters" : { + "eventProtocol" : "JSON" + } + } + } + } + + .. container:: paragraph + + To test the policy try paste the following events into + the console as the APEX engine executes. Note, all tests + from Step 1 will still work perfectly since none of those + events originate from a branch with ``branch_ID`` between + ``1000`` and ``2000``. The 'Task Selection Logic' will + therefore pick the ``MorningBoozeCheck`` task as + expected, and will therefore give the same results. + + .. list-table:: Table 1. Inputs and Outputs when testing *My First Policy* + :widths: 25 40 35 + :header-rows: 1 + + * - Input Event (JSON) + - Output Event (JSON) + - comment + * - .. literalinclude:: events/1/EventIn_BoozeItem_084106GMT.json + :language: JSON + - .. literalinclude:: events/1/EventOut_BoozeItem_084106GMT.json + :language: JSON + - .. container:: paragraph + + Request to buy alcohol item (`item_ID=1249`) at _08:41:06 GMT_ on _Monday, 02 January 2017_. + Sale is not authorized. Uses the `MorningBoozeCheck` task. + + * - .. literalinclude:: events/2/EventIn_BoozeItem_101433CET_thurs.json + :language: JSON + - .. literalinclude:: events/2/EventOut_BoozeItem_101433CET_thurs.json + :language: JSON + - .. container:: paragraph + + Request to buy alcohol (`item_ID=1047`) at _10:14:33_ on _Thursday, 22 December 2016_. + Sale is not authorized. Uses the `MorningBoozeCheckAlt1` task. + + * - .. literalinclude:: events/2/EventIn_BoozeItem_171937CET_sun.json + :language: JSON + - .. literalinclude:: events/2/EventOut_BoozeItem_171937CET_sun.json + :language: JSON + - .. container:: paragraph + + Request to buy alcohol (`item_ID=1443`) at _17:19:37_ on _Sunday, 18 December 2016_. + Sale is not authorized. Uses the `MorningBoozeCheckAlt1` task. + + * - .. literalinclude:: events/2/EventIn_NonBoozeItem_111309CET_mon.json + :language: JSON + - .. literalinclude:: events/2/EventOut_NonBoozeItem_111309CET_mon.json + :language: JSON + - .. container:: paragraph + + Request to buy non-alcoholic item (`item_ID=5321`) at _11:13:09_ on _Monday, 2 January 2017_. + Sale is authorized. Uses the `MorningBoozeCheckAlt1` task. + +CLI Editor File +--------------- + + .. container:: sectionbody + + .. container:: sect2 + + .. rubric:: Policy 2 in CLI Editor + :name: policy_2_in_cli_editor + + .. container:: paragraph + + An equivalent version of the ``MyFirstPolicyModel`` + policy model can again be generated using the APEX CLI + editor. A sample APEX CLI script is shown below: + + .. container:: listingblock + + .. container:: content + + .. code:: CodeRay + + #------------------------------------------------------------------------------- + # ============LICENSE_START======================================================= + # Copyright (C) 2016-2018 Ericsson. All rights reserved. + # ================================================================================ + # Licensed under the Apache License, Version 2.0 (the "License"); + # you may not use this file except in compliance with the License. + # You may obtain a copy of the License at + # + # http://www.apache.org/licenses/LICENSE-2.0 + # + # Unless required by applicable law or agreed to in writing, software + # distributed under the License is distributed on an "AS IS" BASIS, + # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + # See the License for the specific language governing permissions and + # limitations under the License. + # + # SPDX-License-Identifier: Apache-2.0 + # ============LICENSE_END========================================================= + #------------------------------------------------------------------------------- + + model create name=MyFirstPolicyModel version=0.0.1 uuid=540226fb-55ee-4f0e-a444-983a0494818e description="This is my first Apex Policy Model." + + schema create name=assistant_ID_type version=0.0.1 uuid=36df4c71-9616-4206-8b53-976a5cd4bd87 description="A type for 'assistant_ID' values" flavour=Java schema=java.lang.Long + + schema create name=authorised_type version=0.0.1 uuid=d48b619e-d00d-4008-b884-02d76ea4350b description="A type for 'authorised' values" flavour=Java schema=java.lang.Boolean + + schema create name=branch_ID_type version=0.0.1 uuid=6468845f-4122-4128-8e49-0f52c26078b5 description="A type for 'branch_ID' values" flavour=Java schema=java.lang.Long + + schema create name=item_ID_type version=0.0.1 uuid=4f227ff1-aee0-453a-b6b6-9a4b2e0da932 description="A type for 'item_ID' values" flavour=Java schema=java.lang.Long + + schema create name=message_type version=0.0.1 uuid=ad1431bb-3155-4e73-b5a3-b89bee498749 description="A type for 'message' values" flavour=Java schema=java.lang.String + + schema create name=notes_type version=0.0.1 uuid=eecfde90-896c-4343-8f9c-2603ced94e2d description="A type for 'notes' values" flavour=Java schema=java.lang.String + + schema create name=price_type version=0.0.1 uuid=52c2fc45-fd8c-463c-bd6f-d91b0554aea7 description="A type for 'amount'/'price' values" flavour=Java schema=java.lang.Long + + schema create name=quantity_type version=0.0.1 uuid=ac3d9842-80af-4a98-951c-bd79a431c613 description="A type for 'quantity' values" flavour=Java schema=java.lang.Integer + + schema create name=sale_ID_type version=0.0.1 uuid=cca47d74-7754-4a61-b163-ca31f66b157b description="A type for 'sale_ID' values" flavour=Java schema=java.lang.Long + + schema create name=timestamp_type version=0.0.1 uuid=fd594e88-411d-4a94-b2be-697b3a0d7adf description="A type for 'time' values" flavour=Java schema=java.lang.Long + + task create name=MorningBoozeCheck version=0.0.1 uuid=3351b0f4-cf06-4fa2-8823-edf67bd30223 description=LS + This task checks if the sales request is for an item that contains alcohol. + If the local time is between 00:00:00 and 11:30:00 then the sale is not authorised. Otherwise the sale is authorised. + In this implementation we assume that all items with item_ID values between 1000 and 2000 contain alcohol :-) + LE + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=amount schemaName=price_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=quantity schemaName=quantity_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheck version=0.0.1 fieldName=time schemaName=timestamp_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=amount schemaName=price_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=quantity schemaName=quantity_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=authorised schemaName=authorised_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=time schemaName=timestamp_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheck version=0.0.1 fieldName=message schemaName=message_type schemaVersion=0.0.1 optional=true + task logic create name=MorningBoozeCheck version=0.0.1 logicFlavour=MVEL logic=LS + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + import java.util.Date; + import java.util.Calendar; + import java.util.TimeZone; + import java.text.SimpleDateFormat; + + logger.info("Task Execution: '"+subject.id+"'. Input Fields: '"+inFields+"'"); + + outFields.put("amount" , inFields.get("amount")); + outFields.put("assistant_ID", inFields.get("assistant_ID")); + outFields.put("notes" , inFields.get("notes")); + outFields.put("quantity" , inFields.get("quantity")); + outFields.put("branch_ID" , inFields.get("branch_ID")); + outFields.put("item_ID" , inFields.get("item_ID")); + outFields.put("time" , inFields.get("time")); + outFields.put("sale_ID" , inFields.get("sale_ID")); + + item_id = inFields.get("item_ID"); + + //The events used later to test this task use GMT timezone! + gmt = TimeZone.getTimeZone("GMT"); + timenow = Calendar.getInstance(gmt); + df = new SimpleDateFormat("HH:mm:ss z"); + df.setTimeZone(gmt); + timenow.setTimeInMillis(inFields.get("time")); + + midnight = timenow.clone(); + midnight.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),0,0,0); + eleven30 = timenow.clone(); + eleven30.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),11,30,0); + + itemisalcohol = false; + if(item_id != null && item_id >=1000 && item_id < 2000) + itemisalcohol = true; + + if( itemisalcohol + && timenow.after(midnight) && timenow.before(eleven30)){ + outFields.put("authorised", false); + outFields.put("message", "Sale not authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())+ + ". Alcohol can not be sold between "+df.format(midnight.getTime())+ + " and "+df.format(eleven30.getTime())); + return true; + } + else{ + outFields.put("authorised", true); + outFields.put("message", "Sale authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())); + return true; + } + + /* + This task checks if a sale request is for an item that is an alcoholic drink. + If the local time is between 00:00:00 GMT and 11:30:00 GMT then the sale is not + authorised. Otherwise the sale is authorised. + In this implementation we assume that items with item_ID value between 1000 and + 2000 are all alcoholic drinks :-) + */ + LE + + task create name=MorningBoozeCheckAlt1 version=0.0.1 uuid=bc6d90c9-c902-4686-afd3-925b30e39990 description=LS + This task checks if a sale request is for an item that is an alcoholic drink. + If the local time is between 00:00:00 CET and 13:00:00 CET then the sale is not authorised. + Also alcohol sales are not allowed on Sundays. Otherwise the sale is authorised. + In this implementation we assume that items with item_ID between 1000 and 2000 are all alcoholic drinks + LE + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=amount schemaName=price_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=quantity schemaName=quantity_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + task inputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=time schemaName=timestamp_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=amount schemaName=price_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=quantity schemaName=quantity_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=authorised schemaName=authorised_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=time schemaName=timestamp_type schemaVersion=0.0.1 + task outputfield create name=MorningBoozeCheckAlt1 version=0.0.1 fieldName=message schemaName=message_type schemaVersion=0.0.1 optional=true + task logic create name=MorningBoozeCheckAlt1 version=0.0.1 logicFlavour=MVEL logic=LS + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + import java.util.Date; + import java.util.Calendar; + import java.util.TimeZone; + import java.text.SimpleDateFormat; + + logger.info("Task Execution: '"+subject.id+"'. Input Event: '"+inFields+"'"); + + outFields.put("amount" , inFields.get("amount")); + outFields.put("assistant_ID", inFields.get("assistant_ID")); + outFields.put("notes" , inFields.get("notes")); + outFields.put("quantity" , inFields.get("quantity")); + outFields.put("branch_ID" , inFields.get("branch_ID")); + outFields.put("item_ID" , inFields.get("item_ID")); + outFields.put("time" , inFields.get("time")); + outFields.put("sale_ID" , inFields.get("sale_ID")); + + item_id = inFields.get("item_ID"); + + //The events used later to test this task use CET timezone! + cet = TimeZone.getTimeZone("CET"); + timenow = Calendar.getInstance(cet); + df = new SimpleDateFormat("HH:mm:ss z"); + df.setTimeZone(cet); + timenow.setTimeInMillis(inFields.get("time")); + + midnight = timenow.clone(); + midnight.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),0,0,0); + onepm = timenow.clone(); + onepm.set( + timenow.get(Calendar.YEAR),timenow.get(Calendar.MONTH), + timenow.get(Calendar.DATE),13,0,0); + + itemisalcohol = false; + if(item_id != null && item_id >=1000 && item_id < 2000) + itemisalcohol = true; + + if( itemisalcohol && + ( (timenow.after(midnight) && timenow.before(onepm)) + || + (timenow.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) + )){ + outFields.put("authorised", false); + outFields.put("message", "Sale not authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())+ + ". Alcohol can not be sold between "+df.format(midnight.getTime())+ + " and "+df.format(onepm.getTime()) +" or on Sunday"); + return true; + } + else{ + outFields.put("authorised", true); + outFields.put("message", "Sale authorised by policy task "+subject.taskName+ + " for time "+df.format(timenow.getTime())); + return true; + } + + /* + This task checks if a sale request is for an item that is an alcoholic drink. + If the local time is between 00:00:00 CET and 13:00:00 CET then the sale is not authorised. + Also alcohol sales are not allowed on Sundays. Otherwise the sale is authorised. + In this implementation we assume that items with item_ID between 1000 and 2000 are all alcoholic drinks :-) + */ + LE + + event create name=SALE_AUTH version=0.0.1 uuid=c4500941-3f98-4080-a9cc-5b9753ed050b description="An event emitted by the Policy to indicate whether the sale of an item has been authorised" nameSpace=com.hyperm source="APEX" target="POS" + event parameter create name=SALE_AUTH version=0.0.1 parName=amount schemaName=price_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=authorised schemaName=authorised_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=message schemaName=message_type schemaVersion=0.0.1 optional=true + event parameter create name=SALE_AUTH version=0.0.1 parName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + event parameter create name=SALE_AUTH version=0.0.1 parName=quantity schemaName=quantity_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_AUTH version=0.0.1 parName=time schemaName=timestamp_type schemaVersion=0.0.1 + + event create name=SALE_INPUT version=0.0.1 uuid=4f04aa98-e917-4f4a-882a-c75ba5a99374 description="An event raised by the PoS system each time an item is scanned for purchase" nameSpace=com.hyperm source="POS" target="APEX" + event parameter create name=SALE_INPUT version=0.0.1 parName=amount schemaName=price_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=assistant_ID schemaName=assistant_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=branch_ID schemaName=branch_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=item_ID schemaName=item_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=notes schemaName=notes_type schemaVersion=0.0.1 optional=true + event parameter create name=SALE_INPUT version=0.0.1 parName=quantity schemaName=quantity_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=sale_ID schemaName=sale_ID_type schemaVersion=0.0.1 + event parameter create name=SALE_INPUT version=0.0.1 parName=time schemaName=timestamp_type schemaVersion=0.0.1 + + + policy create name=MyFirstPolicy version=0.0.1 uuid=6c5e410f-489a-46ff-964e-982ce6e8b6d0 description="This is my first Apex policy. It checks if a sale should be authorised or not." template=FREEFORM firstState=BoozeAuthDecide + policy state create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide triggerName=SALE_INPUT triggerVersion=0.0.1 defaultTaskName=MorningBoozeCheck defaultTaskVersion=0.0.1 + policy state output create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide outputName=MorningBoozeCheck_Output_Direct eventName=SALE_AUTH eventVersion=0.0.1 nextState=NULL + policy state taskref create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide taskLocalName=MorningBoozeCheckAlt1 taskName=MorningBoozeCheckAlt1 taskVersion=0.0.1 outputType=DIRECT outputName=MorningBoozeCheck_Output_Direct + policy state taskref create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide taskLocalName=MorningBoozeCheck taskName=MorningBoozeCheck taskVersion=0.0.1 outputType=DIRECT outputName=MorningBoozeCheck_Output_Direct + policy state selecttasklogic create name=MyFirstPolicy version=0.0.1 stateName=BoozeAuthDecide logicFlavour=JAVASCRIPT logic=LS + /* + * ============LICENSE_START======================================================= + * Copyright (C) 2016-2018 Ericsson. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + * SPDX-License-Identifier: Apache-2.0 + * ============LICENSE_END========================================================= + */ + + var returnValueType = Java.type("java.lang.Boolean"); + var returnValue = new returnValueType(true); + + executor.logger.info("Task Selection Execution: '"+executor.subject.id+"'. Input Event: '"+executor.inFields+"'"); + + branchid = executor.inFields.get("branch_ID"); + taskorig = executor.subject.getTaskKey("MorningBoozeCheck"); + taskalt = executor.subject.getTaskKey("MorningBoozeCheckAlt1"); + taskdef = executor.subject.getDefaultTaskKey(); + + if(branchid >=0 && branchid <1000){ + taskorig.copyTo(executor.selectedTask); + } + else if (branchid >=1000 && branchid <2000){ + taskalt.copyTo(executor.selectedTask); + } + else{ + taskdef.copyTo(executor.selectedTask); + } + + /* + This task selection logic selects task "MorningBoozeCheck" for branches with 0<=branch_ID<1000 and selects task "MorningBoozeCheckAlt1" for branches with 1000<=branch_ID<2000. Otherwise the default task is selected. In this case the default task is also "MorningBoozeCheck" + */ + LE + + + .. container:: + :name: footer-text + + 2.3.0-SNAPSHOT + Last updated 2020-04-03 16:04:24 IST + +.. |File > New to create a new Policy Model| image:: images/mfp/MyFirstPolicy_P1_newPolicyModel1.png +.. |Create a new Policy Model| image:: images/mfp/MyFirstPolicy_P1_newPolicyModel2.png +.. |ONAP| image:: ../../../images/logos.png + :class: builtBy + :target: http://www.onap.org/ +.. |Right click to create a new event| image:: images/mfp/MyFirstPolicy_P1_newEvent1.png +.. |Fill in the necessary information for the 'SALE_INPUT' event and click 'Submit'| image:: images/mfp/MyFirstPolicy_P1_newEvent2.png +.. |Right click to create a new Item Schema| image:: images/mfp/MyFirstPolicy_P1_newItemSchema1.png +.. |Create a new Item Schema| image:: images/mfp/MyFirstPolicy_P1_newItemSchema2.png +.. |Add new event parameters to an event| image:: images/mfp/MyFirstPolicy_P1_newEvent3.png +.. |Right click to create a new task| image:: images/mfp/MyFirstPolicy_P1_newTask1.png +.. |Add input and out fields for the task| image:: images/mfp/MyFirstPolicy_P1_newTask2.png +.. |Add task logic the task| image:: images/mfp/MyFirstPolicy_P1_newTask3.png +.. |Create a new policy| image:: images/mfp/MyFirstPolicy_P1_newPolicy1.png +.. |Create a state| image:: images/mfp/MyFirstPolicy_P1_newState1.png +.. |Add a Task and Output Mapping| image:: images/mfp/MyFirstPolicy_P1_newState2.png +.. |Validate the policy model for error using the 'Model' > 'Validate' menu item| image:: images/mfp/MyFirstPolicy_P1_validatePolicyModel.png +.. |Download the completed policy model using the 'File' > 'Download' menu item| image:: images/mfp/MyFirstPolicy_P1_exportPolicyModel1.png +.. |Create a new alternative task \`MorningBoozeCheckAlt1\`| image:: images/mfp/MyFirstPolicy_P2_newTask1.png +.. |Right click to edit a policy| image:: images/mfp/MyFirstPolicy_P2_editPolicy1.png +.. |State definition with 2 Tasks and Task Selection Logic| image:: images/mfp/MyFirstPolicy_P2_editState1.png + + |