Adding health check endpoint to distribution

* Adding health check REST endpoint to distribution service.
* Adding isAlive field to DistributionActivator to fetch the health
  status.
* Adding parameter group for rest server parameters.
* Adding DistributionRestController for hosting all the rest endpoints
  in distribution service.
* Adding DistributionRestServer to manage lifecycle of distribution rest server.
* Adding ParameterValidationUtils utility class for common validations.
  Plan is to move this class to policy-common for wider use later.
* Adding test cases for all new code added.
* Refering common classes from policy/common

Change-Id: I246d57133ed1f0c3548bcdee173d7b64fb368abc
Issue-ID: POLICY-1035
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/main/src/test/resources/parameters/DistributionConfigParameters_InvalidRestServerHost.json b/main/src/test/resources/parameters/DistributionConfigParameters_InvalidRestServerHost.json
new file mode 100644
index 00000000..b59074d2
--- /dev/null
+++ b/main/src/test/resources/parameters/DistributionConfigParameters_InvalidRestServerHost.json
@@ -0,0 +1,53 @@
+{
+    "name":"SDCDistributionGroup",
+    "restServerParameters":{
+        "host":"",
+        "port":6969,
+        "userName":"healthcheck",
+        "password":"zb!XztG34"
+    },
+    "receptionHandlerParameters":{
+        "SDCReceptionHandler":{
+            "receptionHandlerType":"SDC",
+            "receptionHandlerClassName":"org.onap.policy.distribution.reception.handling.sdc.SdcReceptionHandler",
+            "pssdConfiguration":{
+                "asdcAddress": "localhost",
+                "messageBusAddress": [
+                    "a.com",
+                    "b.com",
+                    "c.com"
+                 ],
+                "user": "tbdsdc-1480",
+                "password": "tbdsdc-1480",
+                "pollingInterval":20,
+                "pollingTimeout":30,
+                "consumerId": "policy-id",
+                "artifactTypes": [
+                    "TOSCA_CSAR",
+                    "HEAT"
+                ],
+                "consumerGroup": "policy-group",
+                "environmentName": "environmentName",
+                "keystorePath": "null",
+                "keystorePassword": "null",
+                "activeserverTlsAuth": false,
+                "isFilterinEmptyResources": true,
+                "isUseHttpsWithDmaap": false
+            },
+            "pluginHandlerParameters":{
+                "policyDecoders":{
+                    "TOSCADecoder":{
+                        "decoderType":"TOSCA",
+                        "decoderClassName":"org.onap.policy.distribution.reception.decoding.pdpx.PolicyDecoderToscaPdpx"
+                    }
+                },
+                "policyForwarders":{
+                    "PAPEngineForwarder":{
+                        "forwarderType":"PAPEngine",
+                        "forwarderClassName":"org.onap.policy.distribution.forwarding.pap.engine.XacmlPapServletPolicyForwarder"
+                    }
+                }
+            }
+        }
+    }
+}