1 files changed, 121 insertions, 0 deletions
diff --git a/qpid/java/client/src/main/java/org/apache/qpid/client/protocol/HeartbeatDiagnostics.java b/qpid/java/client/src/main/java/org/apache/qpid/client/protocol/HeartbeatDiagnostics.java
new file mode 100644
index 0000000000..d44faeab04
--- /dev/null
+++ b/qpid/java/client/src/main/java/org/apache/qpid/client/protocol/HeartbeatDiagnostics.java
@@ -0,0 +1,121 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.qpid.client.protocol;
+
+class HeartbeatDiagnostics
+{
+    private static final Diagnostics _impl = init();
+
+    private static Diagnostics init()
+    {
+        return Boolean.getBoolean("amqj.heartbeat.diagnostics") ? new On() : new Off();
+    }
+
+    static void sent()
+    {
+        _impl.sent();
+    }
+
+    static void timeout()
+    {
+        _impl.timeout();
+    }
+
+    static void received(boolean heartbeat)
+    {
+        _impl.received(heartbeat);
+    }
+
+    static void init(int delay, int timeout)
+    {
+        _impl.init(delay, timeout);
+    }
+
+    private static interface Diagnostics
+    {
+        void sent();
+        void timeout();
+        void received(boolean heartbeat);
+        void init(int delay, int timeout);
+    }
+
+    private static class On implements Diagnostics
+    {
+        private final String[] messages = new String[50];
+        private int i;
+
+        private void save(String msg)
+        {
+            messages[i++] = msg;
+            if(i >= messages.length){
+                i = 0;//i.e. a circular buffer
+            }
+        }
+
+        public void sent()
+        {
+            save(System.currentTimeMillis() + ": sent heartbeat");
+        }
+
+        public void timeout()
+        {
+            for(int i = 0; i < messages.length; i++)
+            {
+                if(messages[i] != null)
+                {
+                    System.out.println(messages[i]);
+                }
+            }
+            System.out.println(System.currentTimeMillis() + ": timed out");
+        }
+
+        public void received(boolean heartbeat)
+        {
+            save(System.currentTimeMillis() + ": received " + (heartbeat ? "heartbeat" : "data"));
+        }
+
+        public void init(int delay, int timeout)
+        {
+            System.out.println(System.currentTimeMillis() + ": initialised delay=" + delay + ", timeout=" + timeout);
+        }
+    }
+
+    private static class Off implements Diagnostics
+    {
+        public void sent()
+        {
+
+        }
+        public void timeout()
+        {
+
+        }
+        public void received(boolean heartbeat)
+        {
+
+        }
+
+        public void init(int delay, int timeout)
+        {
+
+        }
+    }
+}