Adding TestVNF netconf server

TestVNF netconf server is a partial implementation of a netconfserver for netconf termination.
TestVNF is configurable and can be used for testing purposes.

Issue-ID: INT-355
Change-Id: I98594d7df57ca14582159bb006d8df51dca74ec7
Signed-off-by: a.sreekumar <ajith.sreekumar@ericsson.com>

1 files changed, 75 insertions, 0 deletions

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
index 00000000..29702bd4
--- /dev/null
+++ 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();
+		}
+	}
+
+}