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/*-
* ============LICENSE_START=======================================================
* openECOMP : SDN-C
* ================================================================================
* Copyright (C) 2017 - 2018 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.onap.ccsdk.sli.adaptors.messagerouter.consumer.provider.impl;
import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.PollingConsumer;
import org.onap.ccsdk.sli.adaptors.messagerouter.consumer.api.RequestHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/*
* java.net based client to build message router consumers
*/
public class PollingConsumerImpl implements PollingConsumer {
//RunnableConsumer is a private inner class so run cannot be called from other code
private class RunnableConsumer extends AbstractBaseConsumer implements Runnable, PollingConsumer {
private final Logger LOG = LoggerFactory.getLogger(PollingConsumerImpl.class);
private volatile Thread t;
private final Integer fetchPause;
public RunnableConsumer(String username, String password, String host, String authentication, Integer connectTimeout, Integer readTimeout, Integer fetchPause, String group, String id, String filter, Integer limit, Integer timeoutQueryParamValue) {
super(username, password, host, authentication, connectTimeout, readTimeout, group, id, filter, limit, timeoutQueryParamValue);
this.fetchPause = fetchPause;
}
public void start() {
t = new Thread(this);
t.start();
LOG.info("ConsumerImpl started. Fetch period is {} ms.", fetchPause);
}
public void stop() {
t = null;
LOG.info("ConsumerImpl stopped.");
}
@Override
public void run() {
if (this.url != null) {
Thread thisThread = Thread.currentThread();
while (t == thisThread) {
poll();
try {
LOG.trace("Next fetch from MessageRouter url {} after {} milliseconds.", url, fetchPause);
Thread.sleep(fetchPause);
} catch (InterruptedException e) {
LOG.warn("Thread sleep was interrupted.", e);
}
}
} else {
LOG.error("URL is null, can't listen for messages");
}
}
@Override
public void close() throws Exception {
stop();
}
}
private RunnableConsumer c;
public PollingConsumerImpl(String username, String password, String host, String authentication, Integer connectTimeout, Integer readTimeout, Integer fetchPause, String group, String id, String filter, Integer limit, Integer timeoutQueryParamValue) {
c = new RunnableConsumer(username, password, host, authentication, connectTimeout, readTimeout, fetchPause, group, id, filter, limit, timeoutQueryParamValue);
}
@Override
public void start() {
c.start();
}
@Override
public void registerHandler(String topic, RequestHandler requestHandler) {
c.registerHandler(topic, requestHandler);
}
@Override
public void close() throws Exception {
c.close();
}
}
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