blob: 2d7c8723c528900a550e9c51247ab7eacaa19142 (
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
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
|
#ifndef _IncomingMessage_
#define _IncomingMessage_
/*
*
* 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 <string>
#include <queue>
#include <framing/amqp_framing.h>
#include "ExceptionHolder.h"
#include "ClientMessage.h"
#include "sys/Mutex.h"
#include "sys/Condition.h"
namespace qpid {
namespace framing {
class AMQBody;
}
namespace client {
/**
* Accumulates incoming message frames into messages.
* Client-initiated messages (basic.get) are initiated and made
* available to the user thread one at a time.
*
* Broker initiated messages (basic.return, basic.deliver) are
* queued for handling by the user dispatch thread.
*/
class IncomingMessage {
public:
typedef boost::shared_ptr<framing::AMQBody> BodyPtr;
IncomingMessage();
/** Expect a new message starting with getOk. Called in user thread.*/
void startGet();
/** Wait for the message to complete, return the message.
* Called in user thread.
*@raises QpidError if there was an error.
*/
bool waitGet(Message&);
/** Wait for the next broker-initiated message. */
Message waitDispatch();
/** Add a frame body to the message. Called in network thread. */
void add(BodyPtr);
/** Shut down: all further calls to any function throw ex. */
void shutdown();
/** Check if shutdown */
bool isShutdown() const;
private:
typedef void (IncomingMessage::* ExpectFn)(BodyPtr);
typedef void (IncomingMessage::* EndFn)(Exception*);
typedef std::queue<Message> MessageQueue;
struct Guard;
friend struct Guard;
void reset();
template <class T> boost::shared_ptr<T> expectCheck(BodyPtr);
// State functions - a state machine where each state is
// a member function that processes a frame body.
void expectGetOk(BodyPtr);
void expectHeader(BodyPtr);
void expectContent(BodyPtr);
void expectRequest(BodyPtr);
// End functions.
void endGet(Exception* ex = 0);
void endRequest(Exception* ex);
// Check for complete message.
void checkComplete();
mutable sys::Mutex lock;
ExpectFn state;
EndFn endFn;
Message buildMessage;
ExceptionHolder shutdownError;
// For basic.get messages.
sys::Condition getReady;
ExceptionHolder getError;
Message getMessage;
enum { GETTING, GOT, EMPTY } getState;
// For broker-initiated messages
sys::Condition dispatchReady;
MessageQueue dispatchQueue;
};
}}
#endif
|