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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
/*
*
* 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 java.util.HashSet;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import org.apache.qpid.AMQException;
import org.apache.qpid.framing.AMQShortString;
import org.apache.qpid.framing.FieldTable;
import org.apache.qpid.server.exchange.Exchange;
/**
* When a queue is deleted, it should be deregistered from any
* exchange it has been bound to. This class assists in this task,
* by keeping track of all bindings for a given queue.
*/
class ExchangeBindings
{
private static final FieldTable EMPTY_ARGUMENTS = new FieldTable();
static class ExchangeBinding
{
private final Exchange _exchange;
private final AMQShortString _routingKey;
private final FieldTable _arguments;
ExchangeBinding(AMQShortString routingKey, Exchange exchange)
{
this(routingKey, exchange, EMPTY_ARGUMENTS);
}
ExchangeBinding(AMQShortString routingKey, Exchange exchange, FieldTable arguments)
{
_routingKey = routingKey;
_exchange = exchange;
_arguments = arguments == null ? EMPTY_ARGUMENTS : arguments;
}
void unbind(AMQQueue queue) throws AMQException
{
_exchange.deregisterQueue(_routingKey, queue, _arguments);
}
public Exchange getExchange()
{
return _exchange;
}
public AMQShortString getRoutingKey()
{
return _routingKey;
}
public int hashCode()
{
return (_exchange == null ? 0 : _exchange.hashCode())
+ (_routingKey == null ? 0 : _routingKey.hashCode())
+ (_arguments == null ? 0 : _arguments.hashCode());
}
public boolean equals(Object o)
{
if (!(o instanceof ExchangeBinding))
{
return false;
}
ExchangeBinding eb = (ExchangeBinding) o;
return _exchange.equals(eb._exchange)
&& _routingKey.equals(eb._routingKey)
&& _arguments.equals(eb._arguments);
}
}
private final List<ExchangeBinding> _bindings = new CopyOnWriteArrayList<ExchangeBinding>();
private final AMQQueue _queue;
ExchangeBindings(AMQQueue queue)
{
_queue = queue;
}
/**
* Adds the specified binding to those being tracked.
* @param routingKey the routing key with which the queue whose bindings
* are being tracked by the instance has been bound to the exchange
* @param exchange the exchange bound to
*/
void addBinding(AMQShortString routingKey, FieldTable arguments, Exchange exchange)
{
_bindings.add(new ExchangeBinding(routingKey, exchange, arguments));
}
public void remove(AMQShortString routingKey, FieldTable arguments, Exchange exchange)
{
_bindings.remove(new ExchangeBinding(routingKey, exchange, arguments));
}
/**
* Deregisters this queue from any exchange it has been bound to
*/
void deregister() throws AMQException
{
//remove duplicates at this point
HashSet<ExchangeBinding> copy = new HashSet<ExchangeBinding>(_bindings);
for (ExchangeBinding b : copy)
{
b.unbind(_queue);
}
}
List<ExchangeBinding> getExchangeBindings()
{
return _bindings;
}
}
|
