1 files changed, 61 insertions, 0 deletions
diff --git a/engine-d/src/main/java/org/onap/holmes/engine/dmaap/SubscriberAction.java b/engine-d/src/main/java/org/onap/holmes/engine/dmaap/SubscriberAction.java
new file mode 100644
index 0000000..8d80a6b
--- /dev/null
+++ b/engine-d/src/main/java/org/onap/holmes/engine/dmaap/SubscriberAction.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2017 ZTE Corporation.
+ *
+ * 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.
+ */
+package org.onap.holmes.engine.dmaap;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import javax.annotation.PreDestroy;
+import javax.inject.Inject;
+import org.jvnet.hk2.annotations.Service;
+import org.onap.holmes.dsa.dmaappolling.Subscriber;
+import org.onap.holmes.engine.manager.DroolsEngine;
+
+@Service
+public class SubscriberAction {
+
+    @Inject
+    private DroolsEngine droolsEngine;
+    private HashMap<String, DMaaPAlarmPolling> pollingTasks = new HashMap<>();
+
+    public synchronized void addSubscriber(Subscriber subscriber) {
+        if (!pollingTasks.containsKey(subscriber.getTopic())) {
+            DMaaPAlarmPolling pollingTask = new DMaaPAlarmPolling(subscriber, droolsEngine);
+            Thread thread = new Thread(pollingTask);
+            thread.start();
+            pollingTasks.put(subscriber.getTopic(), pollingTask);
+        }
+    }
+
+    public synchronized void removeSubscriber(Subscriber subscriber) {
+        if (pollingTasks.containsKey(subscriber.getTopic())) {
+            pollingTasks.get(subscriber.getTopic()).stopTask();
+            pollingTasks.remove(subscriber.getTopic());
+        }
+    }
+
+    @PreDestroy
+    public void stopPollingTasks() {
+        Iterator iterator = pollingTasks.entrySet().iterator();
+        while (iterator.hasNext()) {
+            Map.Entry entry = (Map.Entry)iterator.next();
+            String key = (String) entry.getKey();
+            pollingTasks.get(key).stopTask();
+        }
+        pollingTasks.clear();
+    }
+}