| /* |
| * Copyright 2014-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.flow.impl; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import org.onosproject.openflow.controller.OpenFlowSwitch; |
| import org.onosproject.openflow.controller.RoleState; |
| import org.projectfloodlight.openflow.protocol.OFFlowStatsRequest; |
| import org.projectfloodlight.openflow.types.OFPort; |
| import org.projectfloodlight.openflow.types.TableId; |
| import org.slf4j.Logger; |
| |
| import java.util.Timer; |
| import java.util.TimerTask; |
| |
| import static org.slf4j.LoggerFactory.getLogger; |
| |
| /** |
| * Collects flow statistics for the specified switch. |
| */ |
| class FlowStatsCollector implements SwitchDataCollector { |
| |
| private final Logger log = getLogger(getClass()); |
| |
| public static final int SECONDS = 1000; |
| |
| private final OpenFlowSwitch sw; |
| private Timer timer; |
| private TimerTask task; |
| |
| private int pollInterval; |
| |
| /** |
| * Creates a new collector for the given switch and poll frequency. |
| * |
| * @param timer timer to use for scheduling |
| * @param sw switch to pull |
| * @param pollInterval poll frequency in seconds |
| */ |
| FlowStatsCollector(Timer timer, OpenFlowSwitch sw, int pollInterval) { |
| this.timer = timer; |
| this.sw = checkNotNull(sw, "Null switch"); |
| this.pollInterval = pollInterval; |
| } |
| |
| /** |
| * Adjusts poll frequency. |
| * |
| * @param pollInterval poll frequency in seconds |
| */ |
| synchronized void adjustPollInterval(int pollInterval) { |
| this.pollInterval = pollInterval; |
| task.cancel(); |
| task = new InternalTimerTask(); |
| timer.scheduleAtFixedRate(task, pollInterval * SECONDS, pollInterval * 1000); |
| } |
| |
| private class InternalTimerTask extends TimerTask { |
| @Override |
| public void run() { |
| if (sw.getRole() == RoleState.MASTER) { |
| log.trace("Collecting stats for {}", sw.getStringId()); |
| OFFlowStatsRequest request = sw.factory().buildFlowStatsRequest() |
| .setMatch(sw.factory().matchWildcardAll()) |
| .setTableId(TableId.ALL) |
| .setOutPort(OFPort.NO_MASK) |
| .build(); |
| sw.sendMsg(request); |
| } |
| } |
| } |
| |
| public synchronized void start() { |
| // Initially start polling quickly. Then drop down to configured value |
| log.debug("Starting Stats collection thread for {}", sw.getStringId()); |
| task = new InternalTimerTask(); |
| timer.scheduleAtFixedRate(task, 1 * SECONDS, |
| pollInterval * SECONDS); |
| } |
| |
| public synchronized void stop() { |
| log.debug("Stopping Stats collection thread for {}", sw.getStringId()); |
| task.cancel(); |
| task = null; |
| } |
| |
| } |