Adding TestVNF netconf server

[demo.git] / vnfs / TestVNF / netconfserver / src / main / java / com / ericsson / testvnf / server / requestqueue / RequestQueueHandler.java

diff --git a/vnfs/TestVNF/netconfserver/src/main/java/com/ericsson/testvnf/server/requestqueue/RequestQueueHandler.java b/vnfs/TestVNF/netconfserver/src/main/java/com/ericsson/testvnf/server/requestqueue/RequestQueueHandler.java
new file mode 100644 (file)
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+++ b/vnfs/TestVNF/netconfserver/src/main/java/com/ericsson/testvnf/server/requestqueue/RequestQueueHandler.java
@@ -0,0 +1,75 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2016-2018 Ericsson. 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 com.ericsson.testvnf.server.requestqueue;
+
+import java.util.Queue;
+import java.util.concurrent.LinkedBlockingQueue;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+import com.ericsson.testvnf.server.models.NetconfMessage;
+
+/**
+ * RequestQueueHandler manages incoming netconf requests from clients
+ * 
+ * @author Ajith Sreekumar
+ *
+ */
+public class RequestQueueHandler {
+
+       private static final Log log = LogFactory.getLog(RequestQueueHandler.class);
+
+       private volatile Queue<NetconfMessage> requestQueue;
+       
+       public RequestQueueHandler() {
+               requestQueue = new LinkedBlockingQueue<>();
+       }
+
+       // wait until an element is added to queue, once added return it
+       public NetconfMessage waitAndGetMessageFromQueue() throws InterruptedException {
+               NetconfMessage netconfMessage = null;
+               synchronized (requestQueue) {
+                       while (true) {
+                               log.info("Waiting for message to be added to queue..");
+                               if (!requestQueue.isEmpty()) {
+                                       netconfMessage = requestQueue.element();
+                                       requestQueue.remove(requestQueue.element());
+                               }
+                               if (netconfMessage != null) {
+                                       log.info("Message received in queue is taken for processing.");
+                                       break;
+                               }
+                               requestQueue.wait();
+                       }
+               }
+               return netconfMessage;
+       }
+       
+       //add message into the queue
+       public void addToQueue(NetconfMessage netconfMessage) {
+               synchronized (requestQueue) {
+                       log.info("Received a new message in queue.");
+                       requestQueue.add(netconfMessage);
+                       requestQueue.notifyAll();
+               }
+       }
+
+}