1 files changed, 132 insertions, 0 deletions
diff --git a/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/NotificationCheck.java b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/NotificationCheck.java
new file mode 100644
index 0000000000..d1fb0f3fe6
--- /dev/null
+++ b/qpid/java/broker/src/main/java/org/apache/qpid/server/queue/NotificationCheck.java
@@ -0,0 +1,132 @@
+/*
+ *
+ * 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.server.queue;
+
+import org.apache.qpid.AMQException;
+import org.apache.qpid.server.message.ServerMessage;
+
+public enum NotificationCheck
+{
+
+    MESSAGE_COUNT_ALERT
+    {
+        boolean notifyIfNecessary(ServerMessage msg, AMQQueue queue, QueueNotificationListener listener)
+        {
+            int msgCount;
+            final long maximumMessageCount = queue.getMaximumMessageCount();
+            if (maximumMessageCount!= 0 && (msgCount =  queue.getMessageCount()) >= maximumMessageCount)
+            {
+                listener.notifyClients(this, queue, msgCount + ": Maximum count on queue threshold ("+ maximumMessageCount +") breached.");
+                return true;
+            }
+            return false;
+        }
+    },
+    MESSAGE_SIZE_ALERT(true)
+    {
+        boolean notifyIfNecessary(ServerMessage msg, AMQQueue queue, QueueNotificationListener listener)
+        {
+            final long maximumMessageSize = queue.getMaximumMessageSize();
+            if(maximumMessageSize != 0)
+            {
+                // Check for threshold message size
+                long messageSize;
+                messageSize = (msg == null) ? 0 : msg.getSize();
+
+
+                if (messageSize >= maximumMessageSize)
+                {
+                    listener.notifyClients(this, queue, messageSize + "b : Maximum message size threshold ("+ maximumMessageSize +") breached. [Message ID=" + msg.getMessageNumber() + "]");
+                    return true;
+                }
+            }
+            return false;
+        }
+
+    },
+    QUEUE_DEPTH_ALERT
+    {
+        boolean notifyIfNecessary(ServerMessage msg, AMQQueue queue, QueueNotificationListener listener)
+        {
+            // Check for threshold queue depth in bytes
+            final long maximumQueueDepth = queue.getMaximumQueueDepth();
+
+            if(maximumQueueDepth != 0)
+            {
+                final long queueDepth = queue.getQueueDepth();
+
+                if (queueDepth >= maximumQueueDepth)
+                {
+                    listener.notifyClients(this, queue, (queueDepth>>10) + "Kb : Maximum queue depth threshold ("+(maximumQueueDepth>>10)+"Kb) breached.");
+                    return true;
+                }
+            }
+            return false;
+        }
+
+    },
+    MESSAGE_AGE_ALERT
+    {
+        boolean notifyIfNecessary(ServerMessage msg, AMQQueue queue, QueueNotificationListener listener)
+        {
+
+            final long maxMessageAge = queue.getMaximumMessageAge();
+            if(maxMessageAge != 0)
+            {
+                final long currentTime = System.currentTimeMillis();
+                final long thresholdTime = currentTime - maxMessageAge;
+                final long firstArrivalTime = queue.getOldestMessageArrivalTime();
+
+                if(firstArrivalTime < thresholdTime)
+                {
+                    long oldestAge = currentTime - firstArrivalTime;
+                    listener.notifyClients(this, queue, (oldestAge/1000) + "s : Maximum age on queue threshold ("+(maxMessageAge /1000)+"s) breached.");
+
+                    return true;
+                }
+            }
+            return false;
+                    
+        }
+
+    }
+    ;
+
+    private final boolean _messageSpecific;
+
+    NotificationCheck()
+    {
+        this(false);
+    }
+
+    NotificationCheck(boolean messageSpecific)
+    {
+        _messageSpecific = messageSpecific;
+    }
+
+    public boolean isMessageSpecific()
+    {
+        return _messageSpecific;
+    }
+
+    abstract boolean notifyIfNecessary(ServerMessage msg, AMQQueue queue, QueueNotificationListener listener);
+
+}