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/*
*
* 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.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);
}
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