Performacne improvements via adding a netty-based openflowj and openflow plugin;...

[controller.git] / opendaylight / protocol_plugins / openflow_netty / src / main / java / org / opendaylight / controller / protocol_plugin / openflow / core / internal / StatisticsCollector.java

diff --git a/opendaylight/protocol_plugins/openflow_netty/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/core/internal/StatisticsCollector.java b/opendaylight/protocol_plugins/openflow_netty/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/core/internal/StatisticsCollector.java
new file mode 100644 (file)
index 0000000..98fb803
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+++ b/opendaylight/protocol_plugins/openflow_netty/src/main/java/org/opendaylight/controller/protocol_plugin/openflow/core/internal/StatisticsCollector.java
@@ -0,0 +1,81 @@
+
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.protocol_plugin.openflow.core.internal;
+
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.CountDownLatch;
+
+import org.opendaylight.controller.protocol_plugin.openflow.core.ISwitch;
+import org.openflow.protocol.OFError;
+import org.openflow.protocol.OFStatisticsReply;
+import org.openflow.protocol.OFStatisticsRequest;
+import org.openflow.protocol.statistics.OFStatistics;
+
+public class StatisticsCollector implements Callable<Object> {
+
+    private ISwitch sw;
+    private Integer xid;
+    private OFStatisticsRequest request;
+    private CountDownLatch latch;
+    private Object result;
+    private List<OFStatistics> stats;
+
+    public StatisticsCollector(ISwitch sw, int xid, OFStatisticsRequest request) {
+        this.sw = sw;
+        this.xid = xid;
+        this.request = request;
+        latch = new CountDownLatch(1);
+        result = new Object();
+        stats = new CopyOnWriteArrayList<OFStatistics>();
+    }
+
+    /*
+     * accumulate the stats records in result
+     * Returns: true: if this is the last record
+     *                 false: more to come
+     */
+    public boolean collect(OFStatisticsReply reply) {
+        synchronized (result) {
+            stats.addAll(reply.getStatistics());
+            if ((reply.getFlags() & 0x01) == 0) {
+                // all stats are collected, done
+                result = stats;
+                return true;
+            } else {
+                // still waiting for more to come
+                return false;
+            }
+        }
+    }
+
+    @Override
+    public Object call() throws Exception {
+        sw.asyncSend(request, xid);
+        // free up the request as it is no longer needed
+        request = null;
+        // wait until all stats replies are received or timeout
+        latch.await();
+        return result;
+    }
+
+    public Integer getXid() {
+        return this.xid;
+    }
+
+    public void wakeup() {
+        this.latch.countDown();
+    }
+
+    public void wakeup(OFError errorMsg) {
+
+    }
+}