Fix for NullPointerException in Pnf

- Fix: Since lambda expressions are evaluated lazily,
Camunda flow results in an NPE being thrown if RuntimeService
is not acquired as part of invoking thread.
- Modified integration test CreateAndActivatePnfResourceTest
to verify the fix.

Change-Id: I683a8400c81b2edd9d55f2a1d4121a4fdbdf820c
Issue-ID: SO-722
Signed-off-by: Michal Kabaj <michal.kabaj@nokia.com>

2 files changed, 15 insertions, 11 deletions

diff --git a/bpmn/mso-infrastructure-bpmn/src/test/java/org/onap/so/bpmn/infrastructure/pnf/delegate/bpmn/CreateAndActivatePnfResourceTest.java b/bpmn/mso-infrastructure-bpmn/src/test/java/org/onap/so/bpmn/infrastructure/pnf/delegate/bpmn/CreateAndActivatePnfResourceTest.java
index d42717f5c1..b514c38d47 100644
--- a/bpmn/mso-infrastructure-bpmn/src/test/java/org/onap/so/bpmn/infrastructure/pnf/delegate/bpmn/CreateAndActivatePnfResourceTest.java
+++ b/bpmn/mso-infrastructure-bpmn/src/test/java/org/onap/so/bpmn/infrastructure/pnf/delegate/bpmn/CreateAndActivatePnfResourceTest.java
@@ -30,18 +30,17 @@ import static org.onap.so.bpmn.infrastructure.pnf.delegate.ExecutionVariableName
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-
 import org.camunda.bpm.engine.RuntimeService;
 import org.camunda.bpm.engine.history.HistoricVariableInstance;
 import org.camunda.bpm.engine.runtime.ProcessInstance;
 import org.camunda.bpm.engine.test.Deployment;
 import org.camunda.bpm.engine.test.ProcessEngineRule;
 import org.camunda.bpm.engine.test.assertions.bpmn.BpmnAwareTests;
-import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.onap.so.bpmn.infrastructure.pnf.delegate.AaiConnectionTestImpl;
+import org.onap.so.bpmn.infrastructure.pnf.delegate.DmaapClientTestImpl;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit4.SpringRunner;
@@ -61,6 +60,9 @@ public class CreateAndActivatePnfResourceTest {
     @Autowired
     private AaiConnectionTestImpl aaiConnection;
 
+    @Autowired
+    private DmaapClientTestImpl dmaapClientTestImpl;
+
     @Test
     @Deployment(resources = {"process/CreateAndActivatePnfResource.bpmn"})
     public void shouldSaveCurrentIpToVariableIfItAlreadyExistsInAai() throws Exception {
@@ -96,9 +98,8 @@ public class CreateAndActivatePnfResourceTest {
         ProcessInstance instance = runtimeService
                 .startProcessInstanceByKey("CreateAndActivatePnfResource", "businessKey", variables);
         assertThat(instance).isWaitingAt("WaitForDmaapPnfReadyNotification").isWaitingFor("WorkflowMessage");
-        runtimeService.createMessageCorrelation("WorkflowMessage")
-                .processInstanceBusinessKey("businessKey")
-                .correlateWithResult();
+        dmaapClientTestImpl.sendMessage();
+
         // then
         assertThat(instance).isEnded().hasPassedInOrder(
                 "CreateAndActivatePnf_StartEvent",
@@ -125,9 +126,8 @@ public class CreateAndActivatePnfResourceTest {
         ProcessInstance instance = runtimeService
                 .startProcessInstanceByKey("CreateAndActivatePnfResource", "businessKey", variables);
         assertThat(instance).isWaitingAt("WaitForDmaapPnfReadyNotification").isWaitingFor("WorkflowMessage");
-        runtimeService.createMessageCorrelation("WorkflowMessage")
-                .processInstanceBusinessKey("businessKey")
-                .correlateWithResult();
+        dmaapClientTestImpl.sendMessage();
+
         // then
         assertThat(instance).isEnded().hasPassedInOrder(
                 "CreateAndActivatePnf_StartEvent",
diff --git a/bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/delegate/InformDmaapClient.java b/bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/delegate/InformDmaapClient.java
index bb490a06e4..61b1ca4cae 100644
--- a/bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/delegate/InformDmaapClient.java
+++ b/bpmn/so-bpmn-infrastructure-common/src/main/java/org/onap/so/bpmn/infrastructure/pnf/delegate/InformDmaapClient.java
@@ -20,6 +20,7 @@
 
 package org.onap.so.bpmn.infrastructure.pnf.delegate;
 
+import org.camunda.bpm.engine.RuntimeService;
 import org.camunda.bpm.engine.delegate.DelegateExecution;
 import org.camunda.bpm.engine.delegate.JavaDelegate;
 import org.onap.so.bpmn.infrastructure.pnf.dmaap.DmaapClient;
@@ -30,12 +31,15 @@ public class InformDmaapClient implements JavaDelegate {
     private DmaapClient dmaapClient;
 
     @Override
-    public void execute(DelegateExecution execution) throws Exception {
+    public void execute(DelegateExecution execution) {
         String correlationId = (String) execution.getVariable(ExecutionVariableNames.CORRELATION_ID);
-        dmaapClient.registerForUpdate(correlationId, () -> execution.getProcessEngineServices().getRuntimeService()
+        RuntimeService runtimeService = execution.getProcessEngineServices().getRuntimeService();
+        dmaapClient.registerForUpdate(correlationId, () ->
+            runtimeService
                 .createMessageCorrelation("WorkflowMessage")
                 .processInstanceBusinessKey(execution.getProcessBusinessKey())
-                .correlateWithResult());
+                .correlateWithResult()
+        );
     }
 
     @Autowired