Add TOSCA policy status header field to APEX event create CLI

In order to expose the processing status of a TOSCA policy
to APEX-PDP, a new header field for APEX concept "event"
has been introduced to track this within an APEX policy
implementation. This field will be leveraged to extract
the TOSCA policy execution metrics. Note, that the field is
marked as optional for backward compatibility.
Unit tests have been augmented to test for the field wherever
applicable and the default empty value is retained for the others.

"example-grpc" module has been updated to include this field.
Exposing the TOSCA policy execution metrics is outside the
scope of this patch since the current changes are already
very large owing to the atomic nature of the change introduced.

Issue-ID: POLICY-3845
Signed-off-by: Rashmi Pujar <rashmi.pujar1@bell.ca>
Change-Id: Ief6d70f9abcfc8414e10aa51a27815ee9028e4c8

3 files changed, 8 insertions, 5 deletions

diff --git a/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/CDSResponseStatusEvent.json b/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/CDSResponseStatusEvent.json
index 938983362..d616ac12e 100644
--- a/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/CDSResponseStatusEvent.json
+++ b/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/CDSResponseStatusEvent.json
@@ -4,10 +4,11 @@
   "nameSpace": "org.onap.policy.apex.onap.pmcontrol",
   "source": "APEX",
   "target": "DCAE",
+  "toscaPolicyState": "EXIT_SUCCESS",
   "status": {
     "subscriptionName": "testPolicyB",
     "nfName": "pnf300",
     "changeType": "CREATE",
     "message": "success"
   }
-}
+}
\ No newline at end of file
diff --git a/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/LogEvent.json b/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/LogEvent.json
index e227b6699..6fd90771f 100644
--- a/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/LogEvent.json
+++ b/examples/examples-grpc/src/main/resources/examples/events/APEXgRPC/LogEvent.json
@@ -4,6 +4,7 @@
   "nameSpace": "org.onap.policy.apex.onap.pmcontrol",
   "source": "APEX",
   "target": "DCAE",
+  "toscaPolicyState": "",
   "final_status": "FINAL_SUCCESS",
   "message": "Operation successfully completed."
-}
+}
\ No newline at end of file
diff --git a/examples/examples-grpc/src/main/resources/policy/APEXgRPCPolicy.apex b/examples/examples-grpc/src/main/resources/policy/APEXgRPCPolicy.apex
index 636c74b80..34d590dcf 100644
--- a/examples/examples-grpc/src/main/resources/policy/APEXgRPCPolicy.apex
+++ b/examples/examples-grpc/src/main/resources/policy/APEXgRPCPolicy.apex
@@ -1,7 +1,7 @@
 #-------------------------------------------------------------------------------
 # ============LICENSE_START=======================================================
 #  Copyright (C) 2020 Nordix Foundation.
-#  Modifications Copyright (C) 2021 Bell Canada. All rights reserved.
+#  Modifications Copyright (C) 2021-2022 Bell Canada. 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.
@@ -75,7 +75,8 @@ LE
 
 album create name=PMSubscriptionAlbum scope=policy writable=true schemaName=PMSubscriptionType
 
-event create name=testPolicyB version=0.0.1 nameSpace=org.onap.policy.apex.onap.pmcontrol source=DCAE target=APEX
+# Incoming event
+event create name=testPolicyB version=0.0.1 nameSpace=org.onap.policy.apex.onap.pmcontrol source=DCAE target=APEX toscaPolicyState=ENTRY
 event parameter create name=testPolicyB parName=nfName schemaName=SimpleStringType
 event parameter create name=testPolicyB parName=policyName schemaName=SimpleStringType
 event parameter create name=testPolicyB parName=changeType schemaName=SimpleStringType
@@ -109,7 +110,7 @@ event parameter create name=CDSResponseEvent parName=actionIdentifiers schemaNam
 event parameter create name=CDSResponseEvent parName=status schemaName=CDSResponseStatusType
 event parameter create name=CDSResponseEvent parName=payload schemaName=CDSResponsePayloadType
 
-event create name=CDSResponseStatusEvent nameSpace=org.onap.policy.apex.onap.pmcontrol source=APEX target=DCAE
+event create name=CDSResponseStatusEvent nameSpace=org.onap.policy.apex.onap.pmcontrol source=APEX target=DCAE toscaPolicyState=EXIT_SUCCESS
 event parameter create name=CDSResponseStatusEvent parName=status schemaName=SubscriptionStatusType
 
 event create name=LogEvent nameSpace=org.onap.policy.apex.onap.pmcontrol source=APEX target=DCAE