blob: 19a9ac1d23fc680de88d96667b646691eaaefb74 (
plain)
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
|
package org.apache.qpid.server.flow;
import org.apache.qpid.server.message.ServerMessage;
/*
*
* 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.
*
*/
public class MessageAndBytesCreditManager extends AbstractFlowCreditManager implements FlowCreditManager
{
private long _messageCredit;
private long _bytesCredit;
public MessageAndBytesCreditManager(final long messageCredit, final long bytesCredit)
{
_messageCredit = messageCredit;
_bytesCredit = bytesCredit;
}
public synchronized long getMessageCredit()
{
return _messageCredit;
}
public synchronized long getBytesCredit()
{
return _bytesCredit;
}
public synchronized void restoreCredit(long messageCredit, long bytesCredit)
{
_messageCredit += messageCredit;
_bytesCredit += bytesCredit;
setSuspended(hasCredit());
}
public synchronized void removeAllCredit()
{
_messageCredit = 0L;
_bytesCredit = 0L;
setSuspended(true);
}
public synchronized boolean hasCredit()
{
return (_messageCredit > 0L) && ( _bytesCredit > 0L );
}
public synchronized boolean useCreditForMessage(ServerMessage msg)
{
if(_messageCredit == 0L)
{
setSuspended(true);
return false;
}
else
{
final long msgSize = msg.getSize();
if(msgSize > _bytesCredit)
{
setSuspended(true);
return false;
}
_messageCredit--;
_bytesCredit -= msgSize;
setSuspended(false);
return true;
}
}
public synchronized void setBytesCredit(long bytesCredit)
{
_bytesCredit = bytesCredit;
}
}
|
