| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * 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.onlab.util.Timer; |
| import org.onosproject.openflow.controller.OpenFlowSwitch; |
| import org.onosproject.openflow.controller.RoleState; |
| import org.projectfloodlight.openflow.protocol.OFCapabilities; |
| import org.projectfloodlight.openflow.protocol.OFGroupDescStatsRequest; |
| import org.projectfloodlight.openflow.protocol.OFGroupStatsRequest; |
| import org.projectfloodlight.openflow.types.OFGroup; |
| import org.slf4j.Logger; |
| |
| import io.netty.util.Timeout; |
| import io.netty.util.TimerTask; |
| |
| 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 OpenFlowSwitch sw; |
| private final Logger log = getLogger(getClass()); |
| private 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()); |
| |
| sendGroupStatisticRequests(); |
| |
| if (!this.stopTimer) { |
| log.trace("Scheduling stats collection in {} seconds for {}", |
| this.refreshInterval, this.sw.getStringId()); |
| timeout.timer().newTimeout(this, refreshInterval, |
| TimeUnit.SECONDS); |
| } |
| } |
| |
| private void sendGroupDescStatisticRequest(long xid) { |
| OFGroupDescStatsRequest descStatsRequest = |
| sw.factory().buildGroupDescStatsRequest() |
| .setXid(xid) |
| .build(); |
| sw.sendMsg(descStatsRequest); |
| } |
| |
| private void sendGroupStatisticRequest(long xid) { |
| OFGroupStatsRequest statsRequest = sw.factory().buildGroupStatsRequest() |
| .setGroup(OFGroup.ALL) |
| .setXid(xid) |
| .build(); |
| sw.sendMsg(statsRequest); |
| } |
| |
| private void sendGroupStatisticRequests() { |
| if (log.isTraceEnabled()) { |
| log.trace("sendGroupStatistics {}:{}", sw.getStringId(), sw.getRole()); |
| } |
| if (sw.getRole() != RoleState.MASTER) { |
| return; |
| } |
| if (!sw.isConnected()) { |
| return; |
| } |
| |
| if (sw.features().getCapabilities().contains(OFCapabilities.GROUP_STATS)) { |
| long xid = OpenFlowGroupProvider.getXidAndAdd(2); |
| sendGroupStatisticRequest(xid); |
| sendGroupDescStatisticRequest(xid + 1); |
| } else { |
| long xid = OpenFlowGroupProvider.getXidAndAdd(1); |
| sendGroupDescStatisticRequest(xid); |
| } |
| } |
| |
| public void adjustRate(int pollInterval) { |
| this.refreshInterval = pollInterval; |
| } |
| |
| /** |
| * 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(); |
| } |
| } |