Document new A&AI Actor

Issue-ID: POLICY-2515
Change-Id: I97483c3ed84ccafb85869c96a8886d3697ddf319
Signed-off-by: Jim Hahn <jrh3@att.com>

1 files changed, 139 insertions, 4 deletions

diff --git a/docs/development/actors/aai/aai.rst b/docs/development/actors/aai/aai.rst
index b8e0bdc6..a418f440 100644
--- a/docs/development/actors/aai/aai.rst
+++ b/docs/development/actors/aai/aai.rst
@@ -2,14 +2,149 @@
 .. Creative Commons Attribution 4.0 International License.
 .. http://creativecommons.org/licenses/by/4.0
 
-#################
+.. _aai-label:
+
+##########
 A&AI Actor
-#################
+##########
 
 .. contents::
     :depth: 3
 
 Overview of A&AI Actor
-#############################
+######################
+ONAP Policy Framework enables various actors, several of which require additional
+data to be gathered from A&AI via a REST call.  Previously, the request was built,
+and the REST call made, by the application.  However, A&AI queries have now been
+implemented using the new Actor framework.
+
+Each operation supported by the actor is associated with its own java class, which is
+responsible for populating the request structure and invoking the REST service.  The
+class hierarchy is shown below.
+
+.. image:: classHierarchy.png
+
+Currently, the following operations are supported:
+
+- Tenant
+- Pnf
+- CustomQuery
+
+One thing that sets the A&AI Actor implementation apart from the other Actor
+implementations is that it is typically used to gather data for input to the
+other actors.  Consequently, when an A&AI operation completes, it places its
+response into the *properties* field of the *context*, which is passed via the
+*ControlLoopOperationParams*.  The names of the keys within the *properties*
+field are typically of the form, "AAI.<operation>.<targetEntity>", where
+"operation" is the name of the operation, and "targetEntity" is the *targetEntity*
+passed via the *ControlLoopOperationParams*.  For example, the response for
+the Tenant query for a target entity named "ozVserver" would be stored as a
+*properties* named "AAI.Tenant.ozVserver".
+
+On the other hand, as there is only one "custom query" for a given ONSET, the
+*Custom Query* operation deviates from this, in that it always stores its response
+using the key, "AAI.AaiCqResponse".
+
+
+Request
+#######
+
+Most of the the A&AI operations use "GET" requests and thus do not populate
+a request structure.  However, for those that do, the request structure is
+described in the table below.
+
+Note: the Custom Query Operation requires tenant data, thus it performs a *Tenant*
+operation before sending its request.  The tenant data is gathered for the vserver
+whose name is found in the "vserver.vserver-name" field of the enrichment data provided
+by DCAE with the ONSET event.
+
++----------------------------------+---------+----------------------------------------------------------------------+
+| Field Name                       |  Type   |                         Description                                  |
++----------------------------------+---------+----------------------------------------------------------------------+
++----------------------------------+---------+----------------------------------------------------------------------+
+| Custom Query:                    |         |                                                                      |
++----------------------------------+---------+----------------------------------------------------------------------+
+| *start*                          | string  |   Extracted from the *result-data[0].resource-link* field of the     |
+|                                  |         |   Tenant query response.                                             |
++----------------------------------+---------+----------------------------------------------------------------------+
+
+
+Examples
+########
+
+Suppose the *ControlLoopOperationParams* were populated as follows, with the tenant
+query having already been performed:
+
+.. code-block:: bash
+
+        {
+            "actor": "AAI",
+            "operation": "CustomQuery",
+            "context": {
+                "enrichment": {
+                    "vserver.vserver-name": "Ete_vFWCLvFWSNK_7ba1fbde_0"
+                },
+                "properties": {
+                    "AAI.Tenant.Ete_vFWCLvFWSNK_7ba1fbde_0": {
+                        "result-data": [
+                            {
+                                "resource-type": "vserver",
+                                "resource-link": "/aai/v15/cloud-infrastructure/cloud-regions/cloud-region/CloudOwner/RegionOne/tenants/tenant/3f2aaef74ecb4b19b35e26d0849fe9a2/vservers/vserver/6c3b3714-e36c-45af-9f16-7d3a73d99497"
+                            }
+                        ]
+                    }
+                }
+            }
+        }
+
+An example of a Custom Query request constructed by the actor using the above
+parameters, sent to the A&AI REST server:
+
+.. code-block:: bash
+
+        {
+          "start": "/aai/v15/cloud-infrastructure/cloud-regions/cloud-region/CloudOwner/RegionOne/tenants/tenant/3f2aaef74ecb4b19b35e26d0849fe9a2/vservers/vserver/6c3b3714-e36c-45af-9f16-7d3a73d99497",
+          "query": "query/closed-loop"
+        }
+
+
+An example response received from the A&AI REST service:
+
+.. code-block:: bash
+
+        {
+            "results": [
+                {
+                    "vserver": {
+                        "vserver-id": "f953c499-4b1e-426b-8c6d-e9e9f1fc730f",
+                        "vserver-name": "Ete_vFWCLvFWSNK_7ba1fbde_0",
+                        "vserver-name2": "Ete_vFWCLvFWSNK_7ba1fbde_0",
+                        "prov-status": "ACTIVE",
+                        "vserver-selflink": "http://10.12.25.2:8774/v2.1/41d6d38489bd40b09ea8a6b6b852dcbd/servers/f953c499-4b1e-426b-8c6d-e9e9f1fc730f",
+                        "in-maint": false,
+                        "is-closed-loop-disabled": false,
+            ...
+        }
+
+
+Configuration of the A&AI Actor
+###############################
+
+The following table specifies the fields that should be provided to configure the A&AI
+actor.
+
+=============================== ====================    ==================================================================
+Field name                         type                             Description
+=============================== ====================    ==================================================================
+clientName                        string                  Name of the HTTP client to use to send the request to the
+                                                          A&AI REST server.
+timeoutSec                        integer (optional)      Maximum time, in seconds, to wait for a response to be received
+                                                          from the REST server.  Defaults to 90s.
+path                              string                  URI appended to the URL.  This field only applies to individual
+                                                          operations; it does not apply at the actor level.  Note: the
+                                                          *path* should not include a leading or trailing slash.
+=============================== ====================    ==================================================================
 
-This is a place-holder for the actor documentation.
+The individual operations are configured using these same field names.  However, all
+of them, except the *path*, are optional, as they inherit their values from the
+corresponding actor-level fields.