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/*
* Copyright 2015 Open Networking Laboratory
*
* 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.
*/
package org.onosproject.provider.pcep.tunnel.impl;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.ReferenceCardinality;
import org.jboss.netty.util.HashedWheelTimer;
import org.jboss.netty.util.Timeout;
import org.jboss.netty.util.TimerTask;
import org.onlab.util.Timer;
import org.onosproject.pcep.api.PcepController;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.TimeUnit;
/*
* Sends Stats Request and collect the tunnel statistics with a time interval.
*/
public class TunnelStatsCollector implements TimerTask {
private final Logger log = LoggerFactory.getLogger(getClass());
@Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
protected PcepController controller;
private int refreshInterval;
private final HashedWheelTimer timer = Timer.getTimer();
private String pcepTunnelId;
private Timeout timeout;
private volatile boolean stopped;
/**
* Greate a tunnel status collector object.
*
* @param id tunnel whose status data will be collected
* @param refreshInterval time interval for collecting statistic
*/
public TunnelStatsCollector(String id, int refreshInterval) {
this.pcepTunnelId = id;
this.refreshInterval = refreshInterval;
}
@Override
public void run(Timeout timeout) throws Exception {
if (stopped || timeout.isCancelled()) {
return;
}
log.trace("Collecting stats for {}", pcepTunnelId);
sendTunnelStatistic();
if (!stopped && !timeout.isCancelled()) {
log.trace("Scheduling stats collection in {} seconds for {}",
this.refreshInterval, pcepTunnelId);
timeout.getTimer().newTimeout(this, refreshInterval, TimeUnit.SECONDS);
}
}
private void sendTunnelStatistic() {
controller.getTunnelStatistics(pcepTunnelId);
}
synchronized void adjustPollInterval(int pollInterval) {
this.refreshInterval = pollInterval;
}
/**
* Starts the collector.
*/
public synchronized void start() {
log.info("Starting Tunnel Stats collection thread for {}", pcepTunnelId);
stopped = false;
timeout = timer.newTimeout(this, 1, TimeUnit.SECONDS);
}
/**
* Stops the collector.
*/
public synchronized void stop() {
log.info("Stopping Tunnel Stats collection thread for {}", pcepTunnelId);
stopped = true;
timeout.cancel();
}
}
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