Process data-updated event asynchronously

- notification is processed asynchronously using defined threadpool
- updated docker-compose and readme to add dataspace filtering variables

Issue-ID: CPS-526
Signed-off-by: Renu Kumari <renu.kumari@bell.ca>
Change-Id: I7f827250f45cb9e3db2f060e9b3a089a4eaee05c

7 files changed, 138 insertions, 32 deletions

diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
index 5e6e1a268..a512f67ba 100755
--- a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
@@ -23,6 +23,7 @@
 package org.onap.cps.api.impl;
 
 import java.util.Collection;
+import lombok.extern.slf4j.Slf4j;
 import org.onap.cps.api.CpsAdminService;
 import org.onap.cps.api.CpsDataService;
 import org.onap.cps.api.CpsModuleService;
@@ -39,6 +40,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 @Service
+@Slf4j
 public class CpsDataServiceImpl implements CpsDataService {
 
     private static final String ROOT_NODE_XPATH = "/";
@@ -62,7 +64,7 @@ public class CpsDataServiceImpl implements CpsDataService {
     public void saveData(final String dataspaceName, final String anchorName, final String jsonData) {
         final var dataNode = buildDataNodeFromJson(dataspaceName, anchorName, ROOT_NODE_XPATH, jsonData);
         cpsDataPersistenceService.storeDataNode(dataspaceName, anchorName, dataNode);
-        notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        processDataUpdatedEventAsync(dataspaceName, anchorName);
     }
 
     @Override
@@ -70,7 +72,7 @@ public class CpsDataServiceImpl implements CpsDataService {
         final String jsonData) {
         final var dataNode = buildDataNodeFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
         cpsDataPersistenceService.addChildDataNode(dataspaceName, anchorName, parentNodeXpath, dataNode);
-        notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        processDataUpdatedEventAsync(dataspaceName, anchorName);
     }
 
     @Override
@@ -79,7 +81,7 @@ public class CpsDataServiceImpl implements CpsDataService {
         final Collection<DataNode> dataNodesCollection =
             buildDataNodeCollectionFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
         cpsDataPersistenceService.addListDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodesCollection);
-        notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        processDataUpdatedEventAsync(dataspaceName, anchorName);
     }
 
     @Override
@@ -94,7 +96,7 @@ public class CpsDataServiceImpl implements CpsDataService {
         final var dataNode = buildDataNodeFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
         cpsDataPersistenceService
             .updateDataLeaves(dataspaceName, anchorName, dataNode.getXpath(), dataNode.getLeaves());
-        notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        processDataUpdatedEventAsync(dataspaceName, anchorName);
     }
 
     @Override
@@ -102,7 +104,7 @@ public class CpsDataServiceImpl implements CpsDataService {
         final String jsonData) {
         final var dataNode = buildDataNodeFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
         cpsDataPersistenceService.replaceDataNodeTree(dataspaceName, anchorName, dataNode);
-        notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        processDataUpdatedEventAsync(dataspaceName, anchorName);
     }
 
     @Override
@@ -111,13 +113,13 @@ public class CpsDataServiceImpl implements CpsDataService {
         final Collection<DataNode> dataNodes =
             buildDataNodeCollectionFromJson(dataspaceName, anchorName, parentNodeXpath, jsonData);
         cpsDataPersistenceService.replaceListDataNodes(dataspaceName, anchorName, parentNodeXpath, dataNodes);
-        notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        processDataUpdatedEventAsync(dataspaceName, anchorName);
     }
 
     @Override
     public void deleteListNodeData(final String dataspaceName, final String anchorName, final String listNodeXpath) {
         cpsDataPersistenceService.deleteListDataNodes(dataspaceName, anchorName, listNodeXpath);
-        notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        processDataUpdatedEventAsync(dataspaceName, anchorName);
     }
 
 
@@ -157,6 +159,14 @@ public class CpsDataServiceImpl implements CpsDataService {
 
     }
 
+    private void processDataUpdatedEventAsync(final String dataspaceName, final String anchorName) {
+        try {
+            notificationService.processDataUpdatedEvent(dataspaceName, anchorName);
+        } catch (final Exception exception) {
+            log.error("Failed to send message to notification service", exception);
+        }
+    }
+
     private SchemaContext getSchemaContext(final String dataspaceName, final String schemaSetName) {
         return yangTextSchemaSourceSetCache.get(dataspaceName, schemaSetName).getSchemaContext();
     }
diff --git a/cps-service/src/main/java/org/onap/cps/config/AsyncConfig.java b/cps-service/src/main/java/org/onap/cps/config/AsyncConfig.java
new file mode 100644
index 000000000..3ae675e21
--- /dev/null
+++ b/cps-service/src/main/java/org/onap/cps/config/AsyncConfig.java
@@ -0,0 +1,65 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (c) 2021 Bell Canada.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.config;
+
+import javax.validation.constraints.Min;
+import lombok.Setter;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.task.TaskExecutor;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+import org.springframework.validation.annotation.Validated;
+
+@EnableAsync
+@Configuration
+@ConfigurationProperties("notification.async-executor")
+@Validated
+@Setter
+public class AsyncConfig {
+
+    @Min(0)
+    private int corePoolSize = 2;
+    @Min(2)
+    private int maxPoolSize = 10;
+    @Min(0)
+    private int queueCapacity = 2147483647;
+    private boolean waitForTasksToCompleteOnShutdown = true;
+    private String threadNamePrefix = "Async-";
+
+    /**
+     * Creates TaskExecutor for processing data-updated events.
+     *
+     * @return TaskExecutor
+     */
+    @Bean("notificationExecutor")
+    public TaskExecutor getThreadAsyncExecutorForNotification() {
+        final ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
+        executor.setCorePoolSize(corePoolSize);
+        executor.setMaxPoolSize(maxPoolSize);
+        executor.setQueueCapacity(queueCapacity);
+        executor.setWaitForTasksToCompleteOnShutdown(waitForTasksToCompleteOnShutdown);
+        executor.setThreadNamePrefix(threadNamePrefix);
+        return executor;
+    }
+
+}
diff --git a/cps-service/src/main/java/org/onap/cps/notification/CpsDataUpdatedEventFactory.java b/cps-service/src/main/java/org/onap/cps/notification/CpsDataUpdatedEventFactory.java
index e1473d3ff..6b7f5a89b 100644
--- a/cps-service/src/main/java/org/onap/cps/notification/CpsDataUpdatedEventFactory.java
+++ b/cps-service/src/main/java/org/onap/cps/notification/CpsDataUpdatedEventFactory.java
@@ -6,13 +6,15 @@
  * 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
+ *         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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  * ============LICENSE_END=========================================================
  */
 
@@ -36,14 +38,14 @@ import org.onap.cps.utils.DataMapUtils;
 import org.springframework.stereotype.Component;
 
 @Component
-class CpsDataUpdatedEventFactory {
+public class CpsDataUpdatedEventFactory {
 
     private static final URI EVENT_SOURCE;
     private static final String EVENT_TYPE = "org.onap.cps.data-updated-event";
     private static final DateTimeFormatter dateTimeFormatter =
         DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss.SSSZ");
 
-    static  {
+    static {
         try {
             EVENT_SOURCE = new URI("urn:cps:org.onap.cps");
         } catch (final URISyntaxException e) {
@@ -60,7 +62,14 @@ class CpsDataUpdatedEventFactory {
         this.cpsAdminService = cpsAdminService;
     }
 
-    CpsDataUpdatedEvent createCpsDataUpdatedEvent(final String dataspaceName, final String anchorName) {
+    /**
+     * Generates CPS Data Updated event.
+     *
+     * @param dataspaceName dataspaceName
+     * @param anchorName    anchorName
+     * @return CpsDataUpdatedEvent
+     */
+    public CpsDataUpdatedEvent createCpsDataUpdatedEvent(final String dataspaceName, final String anchorName) {
         final var dataNode = cpsDataService
             .getDataNode(dataspaceName, anchorName, "/", FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS);
         final var anchor = cpsAdminService.getAnchor(dataspaceName, anchorName);
diff --git a/cps-service/src/main/java/org/onap/cps/notification/NotificationPublisher.java b/cps-service/src/main/java/org/onap/cps/notification/NotificationPublisher.java
index 1ab032b57..2d8748824 100644
--- a/cps-service/src/main/java/org/onap/cps/notification/NotificationPublisher.java
+++ b/cps-service/src/main/java/org/onap/cps/notification/NotificationPublisher.java
@@ -1,12 +1,13 @@
 /*
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Bell Canada. All rights reserved.
+ *  Copyright (c) 2021 Bell Canada.
  *  ================================================================================
  *  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
+ *         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.
@@ -54,7 +55,7 @@ public class NotificationPublisher {
      *
      * @param cpsDataUpdatedEvent event to be sent to kafka
      */
-    void sendNotification(@NonNull final CpsDataUpdatedEvent cpsDataUpdatedEvent) {
+    public void sendNotification(@NonNull final CpsDataUpdatedEvent cpsDataUpdatedEvent) {
         final var messageKey = cpsDataUpdatedEvent.getContent().getDataspaceName() + ","
             + cpsDataUpdatedEvent.getContent().getAnchorName();
         log.debug("Data Updated event is being sent with messageKey: '{}' & body : {} ",
diff --git a/cps-service/src/main/java/org/onap/cps/notification/NotificationService.java b/cps-service/src/main/java/org/onap/cps/notification/NotificationService.java
index 9cb2c52e0..9ed8b65ad 100644
--- a/cps-service/src/main/java/org/onap/cps/notification/NotificationService.java
+++ b/cps-service/src/main/java/org/onap/cps/notification/NotificationService.java
@@ -6,13 +6,15 @@
  * 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
+ *         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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
  * ============LICENSE_END=========================================================
  */
 
@@ -21,10 +23,12 @@ package org.onap.cps.notification;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 import lombok.extern.slf4j.Slf4j;
-import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Service;
 
 @Service
@@ -45,12 +49,12 @@ public class NotificationService {
      * @param cpsDataUpdatedEventFactory to create CPSDataUpdatedEvent
      * @param notificationErrorHandler   error handler
      */
-    @Autowired
     public NotificationService(
         final NotificationProperties notificationProperties,
         final NotificationPublisher notificationPublisher,
         final CpsDataUpdatedEventFactory cpsDataUpdatedEventFactory,
         final NotificationErrorHandler notificationErrorHandler) {
+        log.info("Notification Properties {}", notificationProperties);
         this.notificationProperties = notificationProperties;
         this.notificationPublisher = notificationPublisher;
         this.cpsDataUpdatedEventFactory = cpsDataUpdatedEventFactory;
@@ -76,7 +80,8 @@ public class NotificationService {
      * @param dataspaceName dataspace name
      * @param anchorName    anchor name
      */
-    public void processDataUpdatedEvent(final String dataspaceName, final String anchorName) {
+    @Async("notificationExecutor")
+    public Future<Void> processDataUpdatedEvent(final String dataspaceName, final String anchorName) {
         log.debug("process data updated event for dataspace '{}' & anchor '{}'", dataspaceName, anchorName);
         try {
             if (shouldSendNotification(dataspaceName)) {
@@ -92,6 +97,7 @@ public class NotificationService {
             notificationErrorHandler.onException("Failed to process cps-data-updated-event.",
                 exception, dataspaceName, anchorName);
         }
+        return CompletableFuture.completedFuture(null);
     }
 
     /*
diff --git a/cps-service/src/test/groovy/org/onap/cps/notification/NotificationServiceSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/notification/NotificationServiceSpec.groovy
index b60d09323..0a2d3d998 100644
--- a/cps-service/src/test/groovy/org/onap/cps/notification/NotificationServiceSpec.groovy
+++ b/cps-service/src/test/groovy/org/onap/cps/notification/NotificationServiceSpec.groovy
@@ -1,12 +1,13 @@
 /*
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2021 Bell Canada. All rights reserved.
+ *  Copyright (c) 2021 Bell Canada.
  *  ================================================================================
  *  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
+ *         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.
@@ -19,30 +20,35 @@
 
 package org.onap.cps.notification
 
+import org.onap.cps.config.AsyncConfig
 import org.onap.cps.event.model.CpsDataUpdatedEvent
 import org.spockframework.spring.SpringBean
+import org.spockframework.spring.SpringSpy
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.boot.test.context.SpringBootTest
+import org.springframework.scheduling.annotation.EnableAsync
 import org.springframework.test.context.ContextConfiguration
 import spock.lang.Shared
 import spock.lang.Specification
 
 @SpringBootTest
+@EnableAsync
 @EnableConfigurationProperties
-@ContextConfiguration(classes = [NotificationProperties])
+@ContextConfiguration(classes = [NotificationProperties, NotificationService, NotificationErrorHandler, AsyncConfig])
 class NotificationServiceSpec extends Specification {
 
     @SpringBean
     NotificationPublisher mockNotificationPublisher = Mock()
     @SpringBean
-    NotificationErrorHandler spyNotificationErrorHandler = Spy(new NotificationErrorHandler())
-    @SpringBean
     CpsDataUpdatedEventFactory mockCpsDataUpdatedEventFactory = Mock()
+    @SpringSpy
+    NotificationErrorHandler spyNotificationErrorHandler
+    @SpringSpy
+    NotificationProperties spyNotificationProperties
 
     @Autowired
-    NotificationProperties notificationProperties
-    NotificationProperties spyNotificationProperties
+    NotificationService objectUnderTest
 
     @Shared
     def myDataspacePublishedName = 'my-dataspace-published'
@@ -50,7 +56,7 @@ class NotificationServiceSpec extends Specification {
 
     def 'Skip sending notification when disabled.'() {
         given: 'notification is disabled'
-            def objectUnderTest = createNotificationService(false)
+            spyNotificationProperties.isEnabled() >> false
         when: 'dataUpdatedEvent is received'
             objectUnderTest.processDataUpdatedEvent(myDataspacePublishedName, myAnchorName)
         then: 'the notification is not sent'
@@ -59,12 +65,14 @@ class NotificationServiceSpec extends Specification {
 
     def 'Send notification when enabled: #scenario.'() {
         given: 'notification is enabled'
-            def objectUnderTest = createNotificationService(true)
+            spyNotificationProperties.isEnabled() >> true
         and: 'event factory can create event successfully'
             def cpsDataUpdatedEvent = new CpsDataUpdatedEvent()
             mockCpsDataUpdatedEventFactory.createCpsDataUpdatedEvent(dataspaceName, myAnchorName) >> cpsDataUpdatedEvent
         when: 'dataUpdatedEvent is received'
-            objectUnderTest.processDataUpdatedEvent(dataspaceName, myAnchorName)
+            def future = objectUnderTest.processDataUpdatedEvent(dataspaceName, myAnchorName)
+        and: 'async processing is completed'
+            future.get()
         then: 'notification is sent'
             expectedSendNotificationCount * mockNotificationPublisher.sendNotification(cpsDataUpdatedEvent)
         where:
@@ -75,12 +83,14 @@ class NotificationServiceSpec extends Specification {
 
     def 'Error handling in notification service.'() {
         given: 'notification is enabled'
-            def objectUnderTest = createNotificationService(true)
+            spyNotificationProperties.isEnabled() >> true
         and: 'event factory can not create event successfully'
             mockCpsDataUpdatedEventFactory.createCpsDataUpdatedEvent(myDataspacePublishedName, myAnchorName) >>
                 { throw new Exception("Could not create event") }
         when: 'event is sent for processing'
-            objectUnderTest.processDataUpdatedEvent(myDataspacePublishedName, myAnchorName)
+            def future = objectUnderTest.processDataUpdatedEvent(myDataspacePublishedName, myAnchorName)
+        and: 'async processing is completed'
+            future.get()
         then: 'error is handled and not thrown to caller'
             notThrown Exception
             1 * spyNotificationErrorHandler.onException(_, _, _, _)
diff --git a/cps-service/src/test/resources/application.yml b/cps-service/src/test/resources/application.yml
index 94f7e818f..b1546d74f 100644
--- a/cps-service/src/test/resources/application.yml
+++ b/cps-service/src/test/resources/application.yml
@@ -1,11 +1,12 @@
 #  ============LICENSE_START=======================================================
-#  Copyright (C) 2021 Bell Canada. All rights reserved.
+#  Copyright (c) 2021 Bell Canada.
 #  ================================================================================
 #  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
+#          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.
@@ -21,6 +22,10 @@ notification:
       enabled-dataspaces: ".*-published,.*-important"
     enabled: true
     topic: cps-event
+  async-executor:
+    core-pool-size: 2
+    max-pool-size: 10
+    queue-capacity: 0
 
 spring:
   kafka: