Fix El-alto staging job

- Clean up scheduledTasksRunner after previous integration tests
- Prevent race condition

Change-Id: I2e112be27d736406b30ccfbfe0f762c164becb6c
Issue-ID: DCAEGEN2-1853
Signed-off-by: Joanna Jeremicz <joanna.jeremicz@nokia.com>

4 files changed, 76 insertions, 9 deletions

diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/configuration/PrhProperties.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/configuration/PrhProperties.java
new file mode 100644
index 00000000..2aa154b2
--- /dev/null
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/configuration/PrhProperties.java
@@ -0,0 +1,39 @@
+/*
+ * ============LICENSE_START=======================================================
+ * PNF-REGISTRATION-HANDLER
+ * ================================================================================
+ * Copyright (C) 2019 NOKIA Intellectual Property. 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.dcaegen2.services.prh.configuration;
+
+import java.time.Duration;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConfigurationProperties("prh")
+public class PrhProperties {
+    private Duration workflowSchedulingInterval = Duration.ofSeconds(10);
+
+    public Duration getWorkflowSchedulingInterval() {
+        return workflowSchedulingInterval;
+    }
+
+    public void setWorkflowSchedulingInterval(Duration schedulingDelay) {
+        this.workflowSchedulingInterval = schedulingDelay;
+    }
+}
diff --git a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTasksRunner.java b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTasksRunner.java
index 25ed262e..70c54a51 100644
--- a/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTasksRunner.java
+++ b/prh-app-server/src/main/java/org/onap/dcaegen2/services/prh/tasks/ScheduledTasksRunner.java
@@ -20,11 +20,12 @@
 
 package org.onap.dcaegen2.services.prh.tasks;
 
-import java.time.Duration;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
+import javax.annotation.PreDestroy;
+import org.onap.dcaegen2.services.prh.configuration.PrhProperties;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.Marker;
@@ -42,17 +43,19 @@ import org.springframework.scheduling.annotation.EnableScheduling;
 @Configuration
 @EnableScheduling
 public class ScheduledTasksRunner {
-    private static final int SCHEDULING_DELAY_FOR_PRH_TASKS = 10;
     private static final Logger LOGGER = LoggerFactory.getLogger(ScheduledTasksRunner.class);
     private static final Marker ENTRY = MarkerFactory.getMarker("ENTRY");
     private static volatile List<ScheduledFuture> scheduledPrhTaskFutureList = new ArrayList<>();
 
     private final TaskScheduler taskScheduler;
     private final ScheduledTasks scheduledTask;
+    private final PrhProperties prhProperties;
 
-    public ScheduledTasksRunner(TaskScheduler taskScheduler, ScheduledTasks scheduledTask) {
+    public ScheduledTasksRunner(TaskScheduler taskScheduler, ScheduledTasks scheduledTask,
+        PrhProperties prhProperties) {
         this.taskScheduler = taskScheduler;
         this.scheduledTask = scheduledTask;
+        this.prhProperties = prhProperties;
     }
 
     @EventListener
@@ -63,6 +66,7 @@ public class ScheduledTasksRunner {
     /**
      * Function which have to stop tasks execution.
      */
+    @PreDestroy
     public synchronized void cancelTasks() {
         scheduledPrhTaskFutureList.forEach(x -> x.cancel(false));
         scheduledPrhTaskFutureList.clear();
@@ -78,7 +82,7 @@ public class ScheduledTasksRunner {
         if (scheduledPrhTaskFutureList.isEmpty()) {
             scheduledPrhTaskFutureList.add(taskScheduler
                 .scheduleWithFixedDelay(scheduledTask::scheduleMainPrhEventTask,
-                    Duration.ofSeconds(SCHEDULING_DELAY_FOR_PRH_TASKS)));
+                    prhProperties.getWorkflowSchedulingInterval()));
             return true;
         } else {
             return false;
diff --git a/prh-app-server/src/main/resources/application.yaml b/prh-app-server/src/main/resources/application.yaml
index 2d244887..983cf81b 100644
--- a/prh-app-server/src/main/resources/application.yaml
+++ b/prh-app-server/src/main/resources/application.yaml
@@ -22,4 +22,5 @@ logging:
 
 management.endpoints.web.exposure.include: "*"
 
-
+prh:
+  workflow-scheduling-interval: 10s
diff --git a/prh-app-server/src/test/java/org/onap/dcaegen2/services/prh/integration/PrhWorkflowSchedulingIntegrationTest.java b/prh-app-server/src/test/java/org/onap/dcaegen2/services/prh/integration/PrhWorkflowSchedulingIntegrationTest.java
index 44dcabfa..fffab218 100644
--- a/prh-app-server/src/test/java/org/onap/dcaegen2/services/prh/integration/PrhWorkflowSchedulingIntegrationTest.java
+++ b/prh-app-server/src/test/java/org/onap/dcaegen2/services/prh/integration/PrhWorkflowSchedulingIntegrationTest.java
@@ -20,22 +20,45 @@
 
 package org.onap.dcaegen2.services.prh.integration;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.doAnswer;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
 import org.junit.jupiter.api.Test;
+import org.mockito.stubbing.Answer;
 import org.onap.dcaegen2.services.prh.tasks.ScheduledTasks;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.mock.mockito.MockBean;
-
-import static org.mockito.Mockito.verify;
+import org.springframework.test.context.TestPropertySource;
 
 
 @SpringBootTest
+@TestPropertySource(properties = {"prh.workflow-scheduling-interval=20ms"})
 class PrhWorkflowSchedulingIntegrationTest {
 
+    private static final int EXPECTED_INVOCATIONS_NUMBER = 1;
+    private static final int REMAINING_INVOCATIONS_NUMBER = 0;
     @MockBean
     private ScheduledTasks scheduledTasks;
+    private CountDownLatch invocationLatch;
 
     @Test
-    void prhWorkflowShouldBeExecutedRightAfterApplicationStart() {
-        verify(scheduledTasks).scheduleMainPrhEventTask();
+    void prhWorkflowShouldBeExecutedRightAfterApplicationStart() throws InterruptedException {
+        invocationLatch = new CountDownLatch(EXPECTED_INVOCATIONS_NUMBER);
+        doAnswer(registerInvocation(invocationLatch)).when(scheduledTasks).scheduleMainPrhEventTask();
+        assertThatMethodWasInvokedOnce();
+    }
+
+    private void assertThatMethodWasInvokedOnce() throws InterruptedException {
+        invocationLatch.await(1, TimeUnit.SECONDS);
+        assertEquals(REMAINING_INVOCATIONS_NUMBER, invocationLatch.getCount());
+    }
+
+    private static Answer registerInvocation(CountDownLatch invocationLatch) {
+        return invocation -> {
+            invocationLatch.countDown();
+            return null;
+        };
     }
 }
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