Filter data updated events based on configured pattern

Issue-ID: CPS-469
Signed-off-by: Renu Kumari <renu.kumari@bell.ca>
Change-Id: I7810990b54c3140677184ea671164b8835a6afbb

2 files changed, 73 insertions, 12 deletions

diff --git a/cps-service/src/main/java/org/onap/cps/notification/NotificationProperties.java b/cps-service/src/main/java/org/onap/cps/notification/NotificationProperties.java
new file mode 100644
index 0000000000..eb75e3f75e
--- /dev/null
+++ b/cps-service/src/main/java/org/onap/cps/notification/NotificationProperties.java
@@ -0,0 +1,41 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2021 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.
+ *  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.notification;
+
+import java.util.Collections;
+import java.util.Map;
+import javax.validation.constraints.NotNull;
+import lombok.Data;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+import org.springframework.validation.annotation.Validated;
+
+@ConfigurationProperties(prefix = "notification.data-updated")
+@Component
+@Data
+@Validated
+public class NotificationProperties {
+
+    @NotNull
+    private String topic;
+    private Map<String, String> filters = Collections.emptyMap();
+    @NotNull
+    private boolean enabled = false;
+}
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 67fc54ba2b..9cb2c52e01 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
@@ -18,39 +18,56 @@
 
 package org.onap.cps.notification;
 
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+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.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 
 @Service
 @Slf4j
 public class NotificationService {
 
-    private boolean dataUpdatedEventNotificationEnabled;
+    private NotificationProperties notificationProperties;
     private NotificationPublisher notificationPublisher;
     private CpsDataUpdatedEventFactory cpsDataUpdatedEventFactory;
     private NotificationErrorHandler notificationErrorHandler;
+    private List<Pattern> dataspacePatterns;
 
     /**
      * Create an instance of Notification Subscriber.
      *
-     * @param dataUpdatedEventNotificationEnabled   notification can be enabled by setting
-     *                                              'notification.data-updated.enabled=true' in application properties
-     * @param notificationPublisher                 notification Publisher
-     * @param cpsDataUpdatedEventFactory            to create CPSDataUpdatedEvent
-     * @param notificationErrorHandler              error handler
+     * @param notificationProperties     properties for notification
+     * @param notificationPublisher      notification Publisher
+     * @param cpsDataUpdatedEventFactory to create CPSDataUpdatedEvent
+     * @param notificationErrorHandler   error handler
      */
     @Autowired
     public NotificationService(
-        @Value("${notification.data-updated.enabled}") final boolean dataUpdatedEventNotificationEnabled,
+        final NotificationProperties notificationProperties,
         final NotificationPublisher notificationPublisher,
         final CpsDataUpdatedEventFactory cpsDataUpdatedEventFactory,
         final NotificationErrorHandler notificationErrorHandler) {
-        this.dataUpdatedEventNotificationEnabled = dataUpdatedEventNotificationEnabled;
+        this.notificationProperties = notificationProperties;
         this.notificationPublisher = notificationPublisher;
         this.cpsDataUpdatedEventFactory = cpsDataUpdatedEventFactory;
         this.notificationErrorHandler = notificationErrorHandler;
+        this.dataspacePatterns = getDataspaceFilterPatterns(notificationProperties);
+    }
+
+    private List<Pattern> getDataspaceFilterPatterns(final NotificationProperties notificationProperties) {
+        if (notificationProperties.isEnabled()) {
+            return Arrays.stream(notificationProperties.getFilters()
+                .getOrDefault("enabled-dataspaces", "")
+                .split(","))
+                .map(filterPattern -> Pattern.compile(filterPattern, Pattern.CASE_INSENSITIVE))
+                .collect(Collectors.toList());
+        } else {
+            return Collections.emptyList();
+        }
     }
 
     /**
@@ -62,7 +79,7 @@ public class NotificationService {
     public void processDataUpdatedEvent(final String dataspaceName, final String anchorName) {
         log.debug("process data updated event for dataspace '{}' & anchor '{}'", dataspaceName, anchorName);
         try {
-            if (shouldSendNotification()) {
+            if (shouldSendNotification(dataspaceName)) {
                 final var cpsDataUpdatedEvent =
                     cpsDataUpdatedEventFactory.createCpsDataUpdatedEvent(dataspaceName, anchorName);
                 log.debug("data updated event to be published {}", cpsDataUpdatedEvent);
@@ -80,8 +97,11 @@ public class NotificationService {
     /*
         Add more complex rules based on dataspace and anchor later
      */
-    private boolean shouldSendNotification() {
-        return dataUpdatedEventNotificationEnabled;
+    private boolean shouldSendNotification(final String dataspaceName) {
+
+        return notificationProperties.isEnabled()
+            && dataspacePatterns.stream()
+            .anyMatch(pattern -> pattern.matcher(dataspaceName).find());
     }
 
 }