[ONOS-2233] Implement of Tunnel monitoring, measurement and observation
1. add a tunnel statistics interface.
2. add a pcep tunnel statistics interface.
3. add a tunnelStatsCollector to poll statistic request ,The polling interval can be configurable.
4. extend the pcepTunnelProvider to handle tunnel statistic message
Change-Id: I1187d586a1833ca4bee55529a65cd61eff0e612d
diff --git a/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/TunnelStatsCollector.java b/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/TunnelStatsCollector.java
new file mode 100644
index 0000000..39249c5
--- /dev/null
+++ b/providers/pcep/tunnel/src/main/java/org/onosproject/provider/pcep/tunnel/impl/TunnelStatsCollector.java
@@ -0,0 +1,104 @@
+/*
+ *
+ * * Copyright 2014-2015 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();
+ }
+}