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
|
#ifndef QPID_CLUSTER_EXP_QUEUESTATE_H
#define QPID_CLUSTER_EXP_QUEUESTATE_H
/*
*
* 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.
*
*/
#include "LockedMap.h"
#include "CountdownTimer.h"
#include "qpid/RefCounted.h"
#include "qpid/sys/Time.h"
#include "qpid/sys/Mutex.h"
#include "qpid/cluster/types.h"
#include <boost/intrusive_ptr.hpp>
// FIXME aconway 2011-06-08: refactor broker::Cluster to put queue ups on
// class broker::Cluster::Queue. This becomes the cluster context.
namespace qpid {
namespace broker {
class Queue;
class QueuedMessage;
}
namespace cluster {
class Multicaster;
/**
* Queue state that is not replicated to the cluster.
* Manages the local queue start/stop status.
*
* Thread safe: Called by connection, dispatch and timer threads.
*/
class QueueContext : public RefCounted {
public:
QueueContext(broker::Queue& q, Multicaster& m);
~QueueContext();
/** Replica state has changed, called in deliver thread.
* @param before replica state before the event.
* @param before replica state after the event.
* @param self is true if this was a self-delivered event.
*/
void replicaState(QueueOwnership before, QueueOwnership after, bool self);
/** Called when queue is stopped, no threads are dispatching.
* May be called in connection or deliver thread.
*/
void stopped();
/** Called in connection thread when a consumer is added.
*@param n: nubmer of consumers after new one is added.
*/
void consume(size_t n);
/** Called in connection thread when a consumer is cancelled on the queue.
*@param n: nubmer of consumers after the cancel.
*/
void cancel(size_t n);
/** Get the context for a broker queue. */
static boost::intrusive_ptr<QueueContext> get(broker::Queue&);
/** Called in timer thread when the timer runs out. */
void timeout();
/** Called by MessageHandler to requeue a message. */
void requeue(uint32_t position, bool redelivered);
/** Called by MessageHandler when a mesages is acquired. */
void acquire(const broker::QueuedMessage& qm);
/** Called by MesageHandler when a message is dequeued. */
broker::QueuedMessage dequeue(uint32_t position);
private:
sys::Mutex lock;
CountdownTimer timer;
broker::Queue& queue; // FIXME aconway 2011-06-08: should be shared/weak ptr?
Multicaster& mcast;
size_t consumers;
typedef LockedMap<uint32_t, broker::QueuedMessage> UnackedMap; // FIXME aconway 2011-09-15: don't need read/write map? Rename
UnackedMap unacked;
};
}} // namespace qpid::cluster
#endif /*!QPID_CLUSTER_EXP_QUEUESTATE_H*/
|
