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+NAP Application Controller (APPC) Client Library Guide
+
++-----------------+------------------+
++-----------------+------------------+
+| Revision | Version 1.0.0 |
++-----------------+------------------+
+| Revision Date | 22 August 2017 |
++-----------------+------------------+
+
++--------------+------------+---------------+--------------------------------------------------+
+| Date | Revision | Author | Changes |
++--------------+------------+---------------+--------------------------------------------------+
+| 2017-08-22 | 1.0.0 | Paul Miller | First draft consistent with AT&T Release 17.10 |
++--------------+------------+---------------+--------------------------------------------------+
++--------------+------------+---------------+--------------------------------------------------+
+
+|
+
+**
+**
+
+1. .. rubric:: Introduction
+ :name: introduction
+
+ 1. .. rubric:: Target Audience
+ :name: target-audience
+
+ This document is for an advanced technical audience, which includes
+ engineers and technicians. Document revisions occur with the release
+ of new software versions.
+
+Related Documentation
+---------------------
+
+ For additional information, see the ONAP Application Controller
+ (APPC) API Guide.
+
+ The following sections describe the conventions this document uses,
+ including notices, text conventions, and command-line conventions.
+
+Command-line Conventions
+========================
+
+The following table lists possible elements in a command-line path.
+
++------------------+--------------------------------------------------------------------------------------------------------+
+| **Convention** | **Description** |
++==================+========================================================================================================+
+| Brackets [ ] | This is used for optional items. |
++------------------+--------------------------------------------------------------------------------------------------------+
+| Braces { } | This indicates choices separated by pipe (\|) for sets from which only one is selected. For example: |
+| | |
+| | {even\|odd} |
++------------------+--------------------------------------------------------------------------------------------------------+
+| Blue text | This indicates a link in this document online. |
++------------------+--------------------------------------------------------------------------------------------------------+
+
+Text Conventions
+~~~~~~~~~~~~~~~~
+
+ The following table lists text conventions in this document.
+
++------------------------------------+----------------------------------------------------------------------------+
+| **Convention** | **Description** |
++====================================+============================================================================+
+| Monospace font with blue shading | This font indicates sample codes, screenshots, or elements. For example: |
+| | |
+| | contact": { |
+| | |
+| | "contactType": "USER", |
+| | "source": "appl", |
+| | |
+| | } |
++------------------------------------+----------------------------------------------------------------------------+
+| *Italics* | Emphasizes a point or denotes new terms defined in the text. |
+| | |
+| | Indicates an external book title reference. |
++------------------------------------+----------------------------------------------------------------------------+
+| Numeric | A number composed of digits 0 through 9. |
++------------------------------------+----------------------------------------------------------------------------+
+| Text | Any combination of alphanumeric characters. |
+| | |
+| | New items in RED |
++------------------------------------+----------------------------------------------------------------------------+
+
+Authors and Contributors
+------------------------
+
+ The following table lists the persons who are authors and
+ contributors to this document.
+
++--------------------+----------------------+
+| **Contributors** |
++====================+======================+
+| Borislav Glozman | Margrethe Fossberg |
++--------------------+----------------------+
+| Paul Mellor | John Buja |
++--------------------+----------------------+
++--------------------+----------------------+
+
+Terms and Acronyms
+------------------
+
+The following table defines terms and acronyms used in this document.
+
++-----------------------+--------------------------------------------------------------+
+| **Term or Acronym** | **Definition** |
++=======================+==============================================================+
+| AAI | Active and Available Inventory |
++-----------------------+--------------------------------------------------------------+
+| AAF | Authentication & Authorization Framework |
++-----------------------+--------------------------------------------------------------+
+| AJSC | AT&T Java Service Container |
++-----------------------+--------------------------------------------------------------+
+| API | Application Programming Interface |
++-----------------------+--------------------------------------------------------------+
+| APPC | Application Controller |
++-----------------------+--------------------------------------------------------------+
+| SDC | Service Design and Creation |
++-----------------------+--------------------------------------------------------------+
+| DCAE | Data Collection Analytics and Events |
++-----------------------+--------------------------------------------------------------+
+| DG | Directed Graph |
++-----------------------+--------------------------------------------------------------+
+| DNS | Domain Name System |
++-----------------------+--------------------------------------------------------------+
+| EELF | Event and Error Logging Framework |
++-----------------------+--------------------------------------------------------------+
+| HDFS | Hadoop Distributed File System |
++-----------------------+--------------------------------------------------------------+
+| HTTP | Hypertext Transfer Protocol |
++-----------------------+--------------------------------------------------------------+
+| IAAS | Infrastructure As A Service |
++-----------------------+--------------------------------------------------------------+
+| I/O | Input/Output |
++-----------------------+--------------------------------------------------------------+
+| JMS | Java Messaging Service |
++-----------------------+--------------------------------------------------------------+
+| JSON | JavaScript Object Notation |
++-----------------------+--------------------------------------------------------------+
+| LAN | Local Area Network |
++-----------------------+--------------------------------------------------------------+
+| LRM | Local Resource Monitor |
++-----------------------+--------------------------------------------------------------+
+| SO | Service Orchestrator |
++-----------------------+--------------------------------------------------------------+
+| NOD | Network on Demand |
++-----------------------+--------------------------------------------------------------+
+| ODL | OpenDaylight |
++-----------------------+--------------------------------------------------------------+
+| ONAP | Open Network Application Platform |
++-----------------------+--------------------------------------------------------------+
+| OS | Operating System |
++-----------------------+--------------------------------------------------------------+
+| PO | Platform Orchestrator |
++-----------------------+--------------------------------------------------------------+
+| RCT | Reference Connection Tool |
++-----------------------+--------------------------------------------------------------+
+| RO | Resource Orchestrator |
++-----------------------+--------------------------------------------------------------+
+| SDN-C | Software Defined Network - Controller |
++-----------------------+--------------------------------------------------------------+
+| SDN-GP | Software Defined Network - Global Platform |
++-----------------------+--------------------------------------------------------------+
+| SME | Subject Matter Expert |
++-----------------------+--------------------------------------------------------------+
+| SNMP | Simple Network Management Protocol |
++-----------------------+--------------------------------------------------------------+
+| SMTP | Simple Mail Transfer Protocol |
++-----------------------+--------------------------------------------------------------+
+| SOT | Source Of Truth (ext. system where data object originates) |
++-----------------------+--------------------------------------------------------------+
+| SSH | Secure Shell |
++-----------------------+--------------------------------------------------------------+
+| TCP | Transmission Control Protocol |
++-----------------------+--------------------------------------------------------------+
+| TPS | Transactions per Second |
++-----------------------+--------------------------------------------------------------+
+| UEB | Universal Event Broker |
++-----------------------+--------------------------------------------------------------+
+| vCE | virtual CE (Customer Edge) router |
++-----------------------+--------------------------------------------------------------+
+| vPE | virtual PE (Provider Edge) router |
++-----------------------+--------------------------------------------------------------+
+| VLAN | Virtual Local Area Network |
++-----------------------+--------------------------------------------------------------+
+| VM | Virtual Machine |
++-----------------------+--------------------------------------------------------------+
+| VNF | Virtual Network Function |
++-----------------------+--------------------------------------------------------------+
+| VNFC | Virtual Network Function Component |
++-----------------------+--------------------------------------------------------------+
+| vSCP | Virtualized Service Control Point |
++-----------------------+--------------------------------------------------------------+
+| WAN | Wide Area Network |
++-----------------------+--------------------------------------------------------------+
+| WUI | Web User Interface |
++-----------------------+--------------------------------------------------------------+
+| XML | Extensible Markup Language |
++-----------------------+--------------------------------------------------------------+
+| YAML | YAML Ain't Markup Language |
++-----------------------+--------------------------------------------------------------+
+
+Client Library Background
+-------------------------
+
+ This guide discusses the Application Controller (APPC) Client
+ Library and how to use it.
+
+About the Client Library
+------------------------
+
+ The APPC client library provides consumers of APPC capabilities with
+ a strongly-typed Java interface and encapsulates the actual
+ interaction with the APPC component over an asynchronous messaging
+ channel such as UEB.
+
+Consumer Logic
+--------------
+
+ The client application that consumes APPC's capability for VNF
+ lifecycle management (the APPC client library) can be implemented
+ against the lightweight and strongly-typed Java API exposed by the
+ APPC client library. The library does not try to impose
+ architectural constraints upon clients, but instead provides support
+ for different options and styles of API. It is the responsibility of
+ the client application to select the most suitable paradigm to use;
+ for example, a client may choose to use blocking calls as opposed to
+ asynchronous notifications.
+
+VNF Lifecycle Management API
+----------------------------
+
+ The API represents a relatively thin layer that consists mainly of
+ business interfaces with strongly-typed APIs and a data object model
+ created for the convenience of the consumer application. 
+
+ The original YANG schema used by the APPC component and the
+ underlying MD-SAL layer on the server-side generates these
+ artifacts.
+
+APP-C Client Library Flow
+-------------------------
+
+ |image0|
+
+Asynchronous Flow
+~~~~~~~~~~~~~~~~~
+
+- The APPC Client Library is called using an asynchronous API using a
+ full command object, which is mapped to a JSON representation.
+
+- The APPC client calls the UEB client and sends the JSON command to a
+ configured topic.
+
+- The APPC client pulls response messages from the configured topic.
+
+- On receiving the response for the command, the APPC client runs the
+ relevant callback method of the consumer ResponseHandler.
+
+ 1. .. rubric:: Synchronous Flow
+ :name: synchronous-flow
+
+- The APPC Client Library is called using a synchronous API using a
+ full command object, which is mapped to a JSON representation.
+
+- The APPC client calls the UEB client and sends the JSON command to a
+ configured topic.
+
+- The APPC client pulls response messages from the configured topic.
+
+- On receiving the **final** response for the command, the APPC client
+ returns the response object with a final status.
+
+1. .. rubric:: Client Library Usage
+ :name: client-library-usage
+
+ 1. .. rubric:: Jar Files
+ :name: jar-files
+
+ The Java application that runs the APPC client kit uses the
+ following jar files:
+
+- com.att.appc.client.client-kit
+
+- com.att.appc.client.client-lib
+
+ The client library JAR files are located in the repository under
+ /gerrit.onap.org/r/p/appc.git/appc-client.
+
+Initialization
+~~~~~~~~~~~~~~~~
+
+ Initialize the client by calling the following method:
+
+ AppcClientServiceFactoryProvider.getFactory(AppcLifeCycleManagerServiceFactory.class).createLifeCycleManagerStateful()
+
+ Specify the following configuration properties as method parameters:
+
+- "topic.read"
+
+- "topic.read.timeout"
+
+- "topic.write"
+
+- "client.key"
+
+- "client.secret"
+
+- "client.name"
+
+- "client.name.id"
+
+- "poolMembers"
+
+- "client.response.timeout"
+
+- "client.graceful.shutdown.timeout"
+
+Shutdown
+~~~~~~~~
+
+Shutdown the client by calling the following method:
+
+void shutdownLifeCycleManager(boolean isForceShutdown)
+
+If the isForceShutdown flag is set to false, the client shuts down as
+soon as all responses for pending requests are received, or upon
+configurable timeout. (client.graceful.shutdown.timeout).
+
+If the isForceShutdown flag is set to true, the client shuts down
+immediately.
+
+Invoking LCM Commands
+~~~~~~~~~~~~~~~~~~~~~
+
+Invoke the LCM commands by:
+
+- Creating input objects, such as AuditInput, LiveUpgradeInput, with
+ relevant command information.
+
+- Executing commands asynchronously, for example:
+
+void liveUpgrade(LiveUpgradeInput liveUpgradeInput,
+ResponseHandler<LiveUpgradeOutput> listener) throws
+AppcClientException;)
+
+In this case, client should implement the ResponseHandler<T> interface.
+
+- Executing commands synchronously, for example:
+
+LiveUpgradeOutput liveUpgrade(LiveUpgradeInput liveUpgradeInput) throws
+AppcClientException;)
+
+Client API
+----------
+
+ After initializing the client, a returned Object of type
+ LifeCycleManagerStateful defines all the Life Cycle Management APIs
+ supported by APPC.
+
+ The interface contains two definitions for each RPC: one for
+ Asynchronous call mode, and one for Synchronous.
+
+ In Asynchronous mode, client consumer should provide a callback
+ function of type:
+
+ ResponseHandler<RPC-NAMEOutput>
+
+ where RPC-NAME is the command name, such as Audit or Snapshot.
+
+ There may be multiple calls to the ResponseHandler for each response
+ returned by APPC. For example, first 100 'accept' is returned, then
+ 400 'success'.
+
+LifeCycleManagerStateful Interface
+----------------------------------
+
+ Generated from the APPC Yang model, this interface defines the
+ services and request/response requirements for the ECOMP APPC
+ component. For example, for LCM Command Audit, the following is
+ defined:
+
+ @RPC(name="audit", outputType=AuditOutput.class)
+
+ AuditOutput audit(AuditInput auditInput) throws AppcClientException;
+
+ For a Synchronous call to Audit, the consumer thread is blocked
+ until a response is received or a timeout exception is thrown.
+
+ @RPC(name="audit", outputType=AuditOutput.class)
+
+ void audit(AuditInput auditInput, ResponseHandler<AuditOutput>
+ listener) throws AppcClientException;
+
+ For an Asynchronous call to Audit, a callback should be provided so
+ that when a response is received the listener is called.
+
+API documentation
+-----------------
+
+ The API documentation is also available as a swagger page generated
+ from files at /client-kit/target/resources.
+
+appc-provider-lcm
+-----------------
+
+This defines the services and request/response requirements for the APPC
+component.
+
+Methods
+--------
+
+The methods should match the actions described in the LCM API Guide. For
+each method:
+
+**Consumes**
+
+This API call consumes the following media types using the
+**Content-Type** request header:
+
+- application/json
+
+**Request body**
+
+The request body is the action name followed by Input (e.g., AuditInput)
+
+**Return type**
+
+The return type is the action name followed by Output (e.g.,
+OutputInput)
+
+**Produces**
+
+This API call produces the following media types according to the
+**Accept** request header; the **Content-Type** response header conveys
+the media type.
+
+- application/json
+
+**Responses**
+
+200 Successful operation
+
+401 Unauthorized
+
+500 Internal server error
+
+.. |image0| image:: image2.png
+ :width: 5.60495in
+ :height: 4.55272in
+
+