1 files changed, 113 insertions, 0 deletions
diff --git a/framework/src/onos/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/PortStatsCollector.java b/framework/src/onos/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/PortStatsCollector.java
new file mode 100644
index 00000000..8383fa3f
--- /dev/null
+++ b/framework/src/onos/providers/openflow/device/src/main/java/org/onosproject/provider/of/device/impl/PortStatsCollector.java
@@ -0,0 +1,113 @@
+/*
+ * 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.device.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.OFPortStatsRequest;
+import org.projectfloodlight.openflow.types.OFPort;
+import org.slf4j.Logger;
+
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicLong;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/*
+ * Sends Group Stats Request and collect the group statistics with a time interval.
+ */
+public class PortStatsCollector implements TimerTask {
+
+    // TODO: Refactoring is required using ScheduledExecutorService
+
+    private final HashedWheelTimer timer = Timer.getTimer();
+    private final OpenFlowSwitch sw;
+    private final Logger log = getLogger(getClass());
+    private int refreshInterval;
+    private final AtomicLong xidAtomic = new AtomicLong(1);
+
+    private Timeout timeout;
+    private volatile boolean stopped;
+
+    /**
+     * Creates a GroupStatsCollector object.
+     *
+     * @param sw Open Flow switch
+     * @param interval time interval for collecting group statistic
+     */
+    public PortStatsCollector(OpenFlowSwitch sw, int interval) {
+        this.sw = sw;
+        this.refreshInterval = interval;
+    }
+
+    @Override
+    public void run(Timeout to) throws Exception {
+        if (stopped || timeout.isCancelled()) {
+            return;
+        }
+        log.trace("Collecting stats for {}", sw.getStringId());
+
+        sendPortStatistic();
+
+        if (!stopped && !timeout.isCancelled()) {
+            log.trace("Scheduling stats collection in {} seconds for {}",
+                    this.refreshInterval, this.sw.getStringId());
+            timeout.getTimer().newTimeout(this, refreshInterval, TimeUnit.SECONDS);
+        }
+    }
+
+    synchronized void adjustPollInterval(int pollInterval) {
+        this.refreshInterval = pollInterval;
+        // task.cancel();
+        // task = new InternalTimerTask();
+        // timer.scheduleAtFixedRate(task, pollInterval * SECONDS, pollInterval * 1000);
+    }
+
+    private void sendPortStatistic() {
+        if (sw.getRole() != RoleState.MASTER) {
+            return;
+        }
+        Long statsXid = xidAtomic.getAndIncrement();
+        OFPortStatsRequest statsRequest = sw.factory().buildPortStatsRequest()
+                .setPortNo(OFPort.ANY)
+                .setXid(statsXid)
+                .build();
+        sw.sendMsg(statsRequest);
+    }
+
+    /**
+     * Starts the collector.
+     */
+    public synchronized void start() {
+        log.info("Starting Port Stats collection thread for {}", sw.getStringId());
+        stopped = false;
+        timeout = timer.newTimeout(this, 1, TimeUnit.SECONDS);
+    }
+
+    /**
+     * Stops the collector.
+     */
+    public synchronized void stop() {
+        log.info("Stopping Port Stats collection thread for {}", sw.getStringId());
+        stopped = true;
+        timeout.cancel();
+    }
+}