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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.extras.exchanges.diagnostic;
import java.util.List;
import java.util.Map;
import javax.management.JMException;
import javax.management.openmbean.OpenDataException;
import javax.management.openmbean.TabularData;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.framing.BasicContentHeaderProperties;
import org.apache.qpid.framing.FieldTable;
import org.apache.qpid.server.exchange.AbstractExchange;
import org.apache.qpid.server.management.MBeanConstructor;
import org.apache.qpid.server.management.MBeanDescription;
import org.apache.qpid.server.queue.AMQMessage;
import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.junit.extensions.util.SizeOf;
/**
*
* This is a special diagnostic exchange type which doesn't actually do anything
* with messages. When it receives a message, it writes information about the
* current memory usage to the "memory" property of the message and places it on the
* diagnosticqueue for retrieval
*
* @author Aidan Skinner
*
*/
public class DiagnosticExchange extends AbstractExchange
{
public static final AMQShortString DIAGNOSTIC_EXCHANGE_CLASS = new AMQShortString("x-diagnostic");
public static final AMQShortString DIAGNOSTIC_EXCHANGE_NAME = new AMQShortString("diagnostic");
/**
* the logger.
*/
//private static final Logger _logger = Logger.getLogger(DiagnosticExchange.class);
/**
* MBean class implementing the management interfaces.
*/
@MBeanDescription("Management Bean for Diagnostic Exchange")
private final class DiagnosticExchangeMBean extends ExchangeMBean
{
/**
* Usual constructor.
*
* @throws JMException
*/
@MBeanConstructor("Creates an MBean for AMQ Diagnostic exchange")
public DiagnosticExchangeMBean() throws JMException
{
super();
_exchangeType = "diagnostic";
init();
}
/**
* Returns nothing, there can be no tabular data for this...
*
* @throws OpenDataException
* @returns null
* @todo ... or can there? Could this actually return all the
* information in one easy to read table?
*/
public TabularData bindings() throws OpenDataException
{
return null;
}
/**
* This exchange type doesn't support queues, so this method does
* nothing.
*
* @param queueName
* the queue you'll fail to create
* @param binding
* the binding you'll fail to create
* @throws JMException
* an exception that will never be thrown
*/
public void createNewBinding(String queueName, String binding) throws JMException
{
// No Op
}
} // End of MBean class
/**
* Creates a new MBean instance
*
* @return the newly created MBean
* @throws AMQException
* if something goes wrong
*/
protected ExchangeMBean createMBean() throws AMQException
{
try
{
return new DiagnosticExchange.DiagnosticExchangeMBean();
}
catch (JMException ex)
{
// _logger.error("Exception occured in creating the direct exchange mbean", ex);
throw new AMQException(null, "Exception occured in creating the direct exchange mbean", ex);
}
}
public AMQShortString getType()
{
return DIAGNOSTIC_EXCHANGE_CLASS;
}
/**
* Does nothing.
*
* @param routingKey
* pointless
* @param queue
* pointless
* @param args
* pointless
* @throws AMQException
* never
*/
public void registerQueue(AMQShortString routingKey, AMQQueue queue, FieldTable args) throws AMQException
{
// No op
}
/**
* Does nothing.
*
* @param routingKey
* pointless
* @param queue
* pointless
* @param args
* pointless
* @throws AMQException
* never
*/
public void deregisterQueue(AMQShortString routingKey, AMQQueue queue, FieldTable args) throws AMQException
{
// No op
}
public boolean isBound(AMQShortString routingKey, AMQQueue queue)
{
return false;
}
public boolean isBound(AMQShortString routingKey)
{
return false;
}
public boolean isBound(AMQQueue queue)
{
return false;
}
public boolean hasBindings()
{
return false;
}
public void route(AMQMessage payload) throws AMQException
{
Long value = new Long(SizeOf.getUsedMemory());
AMQShortString key = new AMQShortString("memory");
FieldTable headers = ((BasicContentHeaderProperties)payload.getContentHeaderBody().properties).getHeaders();
headers.put(key, value);
((BasicContentHeaderProperties)payload.getContentHeaderBody().properties).setHeaders(headers);
AMQQueue q = getQueueRegistry().getQueue(new AMQShortString("diagnosticqueue"));
payload.enqueue(q);
}
@Override
public Map<AMQShortString, List<AMQQueue>> getBindings() {
// TODO Auto-generated method stub
return null;
}
public boolean isBound(AMQShortString routingKey, FieldTable arguments,
AMQQueue queue) {
// TODO Auto-generated method stub
return false;
}
}
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