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
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
*
* 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.store;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.qpid.server.message.EnqueueableMessage;
import org.apache.qpid.server.model.VirtualHost;
/** A simple message store that stores the messages in a thread-safe structure in memory. */
abstract public class AbstractMemoryMessageStore extends NullMessageStore
{
private final AtomicLong _messageId = new AtomicLong(1);
private final AtomicBoolean _closed = new AtomicBoolean(false);
private static final Transaction IN_MEMORY_TRANSACTION = new Transaction()
{
@Override
public StoreFuture commitTranAsync()
{
return StoreFuture.IMMEDIATE_FUTURE;
}
@Override
public void enqueueMessage(TransactionLogResource queue, EnqueueableMessage message)
{
}
@Override
public void dequeueMessage(TransactionLogResource queue, EnqueueableMessage message)
{
}
@Override
public void commitTran()
{
}
@Override
public void abortTran()
{
}
@Override
public void removeXid(long format, byte[] globalId, byte[] branchId)
{
}
@Override
public void recordXid(long format, byte[] globalId, byte[] branchId, Record[] enqueues, Record[] dequeues)
{
}
};
private final StateManager _stateManager;
private final EventManager _eventManager = new EventManager();
public AbstractMemoryMessageStore()
{
_stateManager = new StateManager(_eventManager);
}
@Override
public void configureConfigStore(VirtualHost virtualHost, ConfigurationRecoveryHandler recoveryHandler)
{
_stateManager.attainState(State.INITIALISING);
}
@Override
public void configureMessageStore(VirtualHost virtualHost, MessageStoreRecoveryHandler recoveryHandler,
TransactionLogRecoveryHandler tlogRecoveryHandler)
{
if(_stateManager.isInState(State.INITIAL))
{
_stateManager.attainState(State.INITIALISING);
}
_stateManager.attainState(State.INITIALISED);
}
@Override
public void activate()
{
if(_stateManager.isInState(State.INITIALISING))
{
_stateManager.attainState(State.INITIALISED);
}
_stateManager.attainState(State.ACTIVATING);
_stateManager.attainState(State.ACTIVE);
}
@Override
public StoredMessage addMessage(StorableMessageMetaData metaData)
{
final long id = _messageId.getAndIncrement();
StoredMemoryMessage message = new StoredMemoryMessage(id, metaData);
return message;
}
@Override
public Transaction newTransaction()
{
return IN_MEMORY_TRANSACTION;
}
@Override
public boolean isPersistent()
{
return false;
}
@Override
public void close()
{
if (_closed.compareAndSet(false, true))
{
_stateManager.attainState(State.CLOSING);
_stateManager.attainState(State.CLOSED);
}
}
@Override
public void addEventListener(EventListener eventListener, Event... events)
{
_eventManager.addEventListener(eventListener, events);
}
}
|
