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/*
* ============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();
}
}
}
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