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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.of.group.impl;
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.openflow.controller.OpenFlowSwitch;
import org.onosproject.openflow.controller.RoleState;
import org.projectfloodlight.openflow.protocol.OFGroupDescStatsRequest;
import org.projectfloodlight.openflow.protocol.OFGroupStatsRequest;
import org.projectfloodlight.openflow.types.OFGroup;
import org.slf4j.Logger;
import java.util.concurrent.TimeUnit;
import static org.slf4j.LoggerFactory.getLogger;
/*
* Sends Group Stats Request and collect the group statistics with a time interval.
*/
public class GroupStatsCollector implements TimerTask {
private final HashedWheelTimer timer = Timer.getTimer();
private final OpenFlowSwitch sw;
private final Logger log = getLogger(getClass());
private final int refreshInterval;
private Timeout timeout;
private boolean stopTimer = false;
/**
* Creates a GroupStatsCollector object.
*
* @param sw Open Flow switch
* @param interval time interval for collecting group statistic
*/
public GroupStatsCollector(OpenFlowSwitch sw, int interval) {
this.sw = sw;
this.refreshInterval = interval;
}
@Override
public void run(Timeout timeout) throws Exception {
log.trace("Collecting stats for {}", sw.getStringId());
sendGroupStatistic();
if (!this.stopTimer) {
log.trace("Scheduling stats collection in {} seconds for {}",
this.refreshInterval, this.sw.getStringId());
timeout.getTimer().newTimeout(this, refreshInterval,
TimeUnit.SECONDS);
}
}
private void sendGroupStatistic() {
if (log.isTraceEnabled()) {
log.trace("sendGroupStatistics {}:{}", sw.getStringId(), sw.getRole());
}
if (sw.getRole() != RoleState.MASTER) {
return;
}
Long statsXid = OpenFlowGroupProvider.getXidAndAdd(2);
OFGroupStatsRequest statsRequest = sw.factory().buildGroupStatsRequest()
.setGroup(OFGroup.ALL)
.setXid(statsXid)
.build();
sw.sendMsg(statsRequest);
Long descXid = statsXid + 1;
OFGroupDescStatsRequest descStatsRequest =
sw.factory().buildGroupDescStatsRequest()
.setXid(descXid)
.build();
sw.sendMsg(descStatsRequest);
}
/**
* Starts the collector.
*/
public void start() {
log.info("Starting Group Stats collection thread for {}", sw.getStringId());
timeout = timer.newTimeout(this, 1, TimeUnit.SECONDS);
}
/**
* Stops the collector.
*/
public void stop() {
log.info("Stopping Group Stats collection thread for {}", sw.getStringId());
this.stopTimer = true;
timeout.cancel();
}
}
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