1 files changed, 108 insertions, 0 deletions
diff --git a/appc-dispatcher/appc-dispatcher-common/execution-queue-management-lib/src/main/java/org/openecomp/appc/executionqueue/impl/QueueManager.java b/appc-dispatcher/appc-dispatcher-common/execution-queue-management-lib/src/main/java/org/openecomp/appc/executionqueue/impl/QueueManager.java
new file mode 100644
index 000000000..2d4907fa1
--- /dev/null
+++ b/appc-dispatcher/appc-dispatcher-common/execution-queue-management-lib/src/main/java/org/openecomp/appc/executionqueue/impl/QueueManager.java
@@ -0,0 +1,108 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * openECOMP : APP-C
+ * ================================================================================
+ * Copyright (C) 2017 AT&T 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.openecomp.appc.executionqueue.impl;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedBlockingQueue;
+
+import org.openecomp.appc.executionqueue.MessageExpirationListener;
+import org.openecomp.appc.executionqueue.helper.Util;
+import org.openecomp.appc.executionqueue.impl.object.QueueMessage;
+import com.att.eelf.configuration.EELFLogger;
+import com.att.eelf.configuration.EELFManager;
+
+public class QueueManager {
+
+    private LinkedBlockingQueue<QueueMessage> queue;
+
+    private MessageExpirationListener listener;
+
+    private static int MAX_QUEUE_SIZE = Util.getExecutionQueSize();
+
+    private static int MAX_THREAD_SIZE = Util.getThreadPoolSize();
+
+    private ExecutorService messageExecutor;
+
+    private static final EELFLogger logger =
+            EELFManager.getInstance().getLogger(QueueManager.class);
+
+    private QueueManager(){
+        init();
+    }
+
+    private static class QueueManagerHolder {
+        private static final QueueManager INSTANCE = new QueueManager();
+    }
+
+    public static QueueManager getInstance() {
+        return QueueManagerHolder.INSTANCE;
+    }
+
+    private void init(){
+        queue = new LinkedBlockingQueue(MAX_QUEUE_SIZE);
+        messageExecutor = Executors.newFixedThreadPool(MAX_THREAD_SIZE,Util.getThreadFactory(true));
+
+        for(int i=0;i<MAX_THREAD_SIZE;i++){
+            messageExecutor.submit(new Runnable() {
+                @Override
+                public void run() {
+                    while (true){
+                        try{
+                            QueueMessage queueMessage = queue.take();
+                            if(messageExpired(queueMessage)){
+                                logger.debug("Message expired "+ queueMessage.getMessage());
+                                if(listener != null){
+                                    listener.onMessageExpiration(queueMessage.getMessage());
+                                }
+                                else{
+                                    logger.warn("Listener not available for expired message ");
+                                }
+                            }
+                            else{
+                                queueMessage.getMessage().run();
+                            }
+                        } catch (Exception e) {
+                            logger.error("Error in startMessagePolling method of ExecutionQueueServiceImpl" + e.getMessage());
+                        }
+                    }
+                }
+            });
+        }
+    }
+
+    public void setListener(MessageExpirationListener listener) {
+        this.listener = listener;
+    }
+
+    public boolean enqueueTask(QueueMessage queueMessage) {
+        return queue.offer(queueMessage);
+    }
+
+    private boolean messageExpired(QueueMessage queueMessage) {
+        if(queueMessage.getExpirationTime() != null){
+            return queueMessage.getExpirationTime().getTime() < System.currentTimeMillis();
+        }
+        return false;
+    }
+
+}