/
CompositeTaskRunner.cpp
181 lines (143 loc) · 4.68 KB
/
CompositeTaskRunner.cpp
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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
/*
* 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 "CompositeTaskRunner.h"
#include <memory>
#include <activemq/exceptions/ActiveMQException.h>
using namespace std;
using namespace activemq;
using namespace activemq::threads;
using namespace activemq::exceptions;
using namespace decaf;
using namespace decaf::util;
using namespace decaf::lang;
using namespace decaf::lang::exceptions;
////////////////////////////////////////////////////////////////////////////////
CompositeTaskRunner::CompositeTaskRunner() {
this->threadTerminated = false;
this->pending = false;
this->shutDown = false;
this->thread.reset( new Thread( this ) );
this->thread->start();
}
////////////////////////////////////////////////////////////////////////////////
CompositeTaskRunner::~CompositeTaskRunner() {
try{
this->shutdown();
}
AMQ_CATCHALL_NOTHROW()
}
////////////////////////////////////////////////////////////////////////////////
void CompositeTaskRunner::shutdown( unsigned int timeout ) {
synchronized( &mutex ) {
shutDown = true;
pending = true;
mutex.notifyAll();
// Wait till the thread stops ( no need to wait if shutdown
// is called from thread that is shutting down)
if( !threadTerminated ) {
mutex.wait( timeout );
}
}
}
////////////////////////////////////////////////////////////////////////////////
void CompositeTaskRunner::shutdown() {
synchronized( &mutex ) {
shutDown = true;
pending = true;
mutex.notifyAll();
}
// Wait till the thread stops
if( !threadTerminated ) {
this->thread->join();
}
}
////////////////////////////////////////////////////////////////////////////////
void CompositeTaskRunner::wakeup() {
synchronized( &mutex ) {
if( shutDown) {
return;
}
pending = true;
mutex.notifyAll();
}
}
////////////////////////////////////////////////////////////////////////////////
void CompositeTaskRunner::run() {
try {
while( true ) {
synchronized( &mutex ) {
pending = false;
if( shutDown ) {
return;
}
}
if( !this->iterate() ) {
// wait to be notified.
synchronized( &mutex ) {
if( shutDown ) {
return;
}
while( !pending ) {
mutex.wait();
}
}
}
}
}
AMQ_CATCH_NOTHROW( Exception )
AMQ_CATCHALL_NOTHROW()
// Make sure we notify any waiting threads that thread
// has terminated.
synchronized( &mutex ) {
threadTerminated = true;
mutex.notifyAll();
}
}
////////////////////////////////////////////////////////////////////////////////
void CompositeTaskRunner::addTask( CompositeTask* task ) {
if( task != NULL ) {
synchronized( &tasks ) {
this->tasks.add( task );
this->wakeup();
}
}
}
////////////////////////////////////////////////////////////////////////////////
void CompositeTaskRunner::removeTask( CompositeTask* task ) {
if( task != NULL ) {
synchronized( &tasks ) {
this->tasks.remove( task );
this->wakeup();
}
}
}
////////////////////////////////////////////////////////////////////////////////
bool CompositeTaskRunner::iterate() {
synchronized( &tasks ) {
auto_ptr< Iterator<CompositeTask*> > iter( tasks.iterator() );
while( iter->hasNext() ) {
CompositeTask* task = iter->next();
if( task->isPending() ) {
task->iterate();
// Always return true, so that we check again for
// any of the other tasks that might now be pending.
return true;
}
}
}
return false;
}