blob: a386f66b11bc5cd3094699a1891050768cc4685f (
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
|
package org.apache.qpid.server.flow;
import org.apache.qpid.server.message.ServerMessage;
import java.util.concurrent.atomic.AtomicLong;
/*
*
* 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 MessageOnlyCreditManager extends AbstractFlowCreditManager implements FlowCreditManager
{
private final AtomicLong _messageCredit;
public MessageOnlyCreditManager(final long initialCredit)
{
_messageCredit = new AtomicLong(initialCredit);
}
public long getMessageCredit()
{
return _messageCredit.get();
}
public long getBytesCredit()
{
return -1L;
}
public void restoreCredit(long messageCredit, long bytesCredit)
{
_messageCredit.addAndGet(messageCredit);
setSuspended(false);
}
public void removeAllCredit()
{
setSuspended(true);
_messageCredit.set(0L);
}
public boolean hasCredit()
{
return _messageCredit.get() > 0L;
}
public boolean useCreditForMessage(ServerMessage msg)
{
if(hasCredit())
{
if(_messageCredit.addAndGet(-1L) >= 0)
{
setSuspended(false);
return true;
}
else
{
_messageCredit.addAndGet(1L);
setSuspended(true);
return false;
}
}
else
{
setSuspended(true);
return false;
}
}
}
|
