1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*
*
* 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.management.domain.handler.impl;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.BlockingQueue;
import org.apache.qpid.management.Messages;
import org.apache.qpid.management.domain.handler.base.BaseMessageHandler;
import org.apache.qpid.management.domain.model.DomainModel;
import org.apache.qpid.management.domain.model.InvocationEvent;
import org.apache.qpid.transport.codec.Decoder;
import org.apache.qpid.transport.util.Logger;
/**
* Message handler for method response messages.
* This handler is installed on domain model as a method invocation result listener.
* When a method is going to be invoked this listener is notified with the exchange channel that will be used between it and
* the event (method invocation) source object.
*
* @author Andrea Gazzarini
*
*/
public class MethodResponseMessageHandler extends BaseMessageHandler
{
private final static Logger LOGGER = Logger.get(MethodResponseMessageHandler.class);
private Map<Integer, BlockingQueue<InvocationResult>> _exchangeChannels = new HashMap<Integer, BlockingQueue<InvocationResult>>();
/**
* This is the listener installed on domain model for method invocations.
*/
private final IMethodInvocationListener methodInvocationListener = new IMethodInvocationListener()
{
/**
* Event source callback.
* A method is going to be invoked and this method lets this listener take the exchange channel that will be used
* with the event source for synchronous communication.
*
* @param event the operation invocation event.
*/
public void operationIsGoingToBeInvoked (InvocationEvent event)
{
_exchangeChannels.put(event.getSequenceNumber(), event.getExchangeChannel());
}
};
/**
* Processes the incoming message.
*
* @param decoder the decoder used for parsing incoming data.
* @param sequenceNumber the sequence number of the incoming message.
*/
public void process (Decoder decoder, int sequenceNumber)
{
InvocationResult result = new InvocationResult(decoder.readUint32(), decoder.readStr16(),decoder.readReaminingBytes());
BlockingQueue<InvocationResult> exchangeChannel = _exchangeChannels.remove(sequenceNumber);
if (exchangeChannel != null)
{
try
{
exchangeChannel.put(result);
} catch (InterruptedException exception)
{
LOGGER.error(exception,Messages.QMAN_100010_METHOD_INVOCATION_RESULT_FAILURE,sequenceNumber);
}
} else
{
LOGGER.warn(
"Unable to deal with incoming message because it contains a unknown sequence number (%s).",
sequenceNumber);
}
}
/**
* Sets the domain model on this handler.
* In addiction, this handler registers a method invocation listener on the domain model.
*
* @param domainModel the managed broker domain model.
*/
@Override
public void setDomainModel (DomainModel domainModel)
{
super.setDomainModel(domainModel);
domainModel.setMethodInvocationListener(methodInvocationListener);
}
}
|
