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.. Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
-#################
-Guard Actor
-#################
+###########
+GUARD Actor
+###########
.. contents::
:depth: 3
-Overview of Guard Actor
-#############################
+Overview of GUARD Actor
+#######################
-This is a place-holder for the actor documentation.
+Within ONAP Policy Framework, a GUARD is typically an implicit check performed at the
+start of each operation and is performed by making a REST call to the XACML-PDP.
+Previously, the request was built, and the REST call made, by the application. However,
+Guard checks have now been implemented using the new Actor framework.
+
+Currently, there is a single operation, *Decision*, which is implemented by the java
+class, *GuardOperation*. This class is derived from *HttpOperation*.
+
+
+Request
+#######
+
+A number of the request fields are populated from values specified in the
+actor/operation's configuration parameters (e.g., "onapName"). Additional fields
+are specified below.
+
+Request ID
+**********
+
+The "requestId" field is set to a UUID.
+
+
+Resource
+********
+
+The "resource" field is populated with a *Map* containing a single item, "guard". The
+value of the item is set to the contents of the *payload* specified within the
+*ControlLoopOperationParams*.
+
+
+Examples
+########
+
+Suppose the *ControlLoopOperationParams* were populated as follows:
+
+.. code-block:: bash
+
+ {
+ "actor": "GUARD",
+ "operation": "Decision",
+ "payload": {
+ "actor": "SO",
+ "operation": "VF Module Create",
+ "target": "OzVServer",
+ "requestId": "c7c6a4aa-bb61-4a15-b831-ba1472dd4a65",
+ "clname": "ControlLoop-vDNS-6f37f56d-a87d-4b85-b6a9-cc953cf779b3",
+ "vfCount": 2
+ }
+ }
+
+An example of a request constructed by the actor using the above parameters, sent to the
+GUARD REST server:
+
+.. code-block:: bash
+
+ {
+ "ONAPName": "Policy",
+ "ONAPComponent": "Drools PDP",
+ "ONAPInstance": "Usecases",
+ "requestId": "90ee99d2-f2d8-4d90-b162-605203c30180",
+ "action": "guard",
+ "resource": {
+ "guard": {
+ "actor": "SO",
+ "operation": "VF Module Create",
+ "target": "OzVServer",
+ "requestId": "c7c6a4aa-bb61-4a15-b831-ba1472dd4a65",
+ "clname": "ControlLoop-vDNS-6f37f56d-a87d-4b85-b6a9-cc953cf779b3",
+ "vfCount": 2
+ }
+ }
+ }
+
+
+An example response received from the GUARD REST service:
+
+.. code-block:: bash
+
+ {
+ "status": "Permit",
+ "advice": {},
+ "obligations": {},
+ "policies": {}
+ }
+
+
+Configuration of the GUARD Actor
+################################
+
+The following table specifies the fields that should be provided to configure the GUARD
+actor.
+
+=============================== ===================== ==================================================================
+Field name type Description
+=============================== ===================== ==================================================================
+clientName string Name of the HTTP client to use to send the request to the
+ GUARD 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.
+onapName string ONAP Name (e.g., "Policy")
+onapComponent string ONAP Component (e.g., "Drools PDP")
+onapInstance string ONAP Instance (e.g., "Usecases")
+action string (optional) Used to populate the "action" request field.
+ Defaults to "guard".
+disabled boolean (optional) **True**, to disable guard checks, **false** otherwise.
+ Defaults to *false*.
+=============================== ===================== ==================================================================
+
+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.