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
|
/**
* @file
* @author 2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
* @copyright Simplified BSD
*
* @cond
* This program is free software: you can redistribute it and/or modify
* it under the terms of the FreeBSD license as published by the FreeBSD
* project.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the FreeBSD license along with this
* program. If not, see <http://www.opensource.org/licenses/bsd-license>.
* @endcond
*/
#include <boost/algorithm/string.hpp>
#include "PostponeElement.h"
#include "uscxml/plugins/invoker/http/HTTPServletInvoker.h"
#include "uscxml/DOMUtils.h"
#include <glog/logging.h>
#ifdef BUILD_AS_PLUGINS
#include <Pluma/Connector.hpp>
#endif
namespace uscxml {
#ifdef BUILD_AS_PLUGINS
PLUMA_CONNECTOR
bool pluginConnect(pluma::Host& host) {
host.add( new PostponeElementProvider() );
return true;
}
#endif
boost::shared_ptr<ExecutableContentImpl> PostponeElement::create(InterpreterImpl* interpreter) {
boost::shared_ptr<PostponeElement> invoker = boost::shared_ptr<PostponeElement>(new PostponeElement());
invoker->_interpreter = interpreter;
return invoker;
}
void PostponeElement::enterElement(const Arabica::DOM::Node<std::string>& node) {
if (!_interpreter->getDataModel()) {
LOG(ERROR) << "Postpone element requires a datamodel";
return;
}
// under which condition will we postpone the current event?
if (HAS_ATTR(node, "cond")) {
std::string cond = ATTR(node, "cond");
try {
if (!_interpreter->getDataModel().evalAsBool(cond))
return;
} catch (Event e) {
LOG(ERROR) << "Syntax error in cond attribute of postpone element:" << std::endl << e << std::endl;
return;
}
}
// chaining causes the event to fire if the condition was true since postponing
bool chained = false;
if (HAS_ATTR(node, "chaining")) {
chained = iequals(ATTR(node, "chaining"), "true");
}
// when will we refire the event?
std::string until;
try {
if (HAS_ATTR(node, "untilexpr")) {
until = _interpreter->getDataModel().evalAsString(ATTR(node, "untilexpr"));
} else if (HAS_ATTR(node, "until")) {
until = ATTR(node, "until");
}
} catch (Event e) {
LOG(ERROR) << "Syntax error in postpone element untilexpr:" << std::endl << e << std::endl;
return;
}
if (until.length() == 0) {
LOG(ERROR) << "Postpone element requires until or untilexpr attribute ";
return;
}
// LOG(INFO) << until;
#if 0
std::string timeoutStr = "0s";
try {
if (HAS_ATTR(node, "timeoutexpr")) {
timeoutStr = _interpreter->getDataModel().evalAsString(ATTR(node, "timeoutexpr"));
} else if (HAS_ATTR(node, "timeout")) {
timeoutStr = ATTR(node, "timeout");
}
} catch (Event e) {
LOG(ERROR) << "Syntax error in postpone element timeoutexpr:" << std::endl << e << std::endl;
return;
}
uint64_t timeout = 0;
NumAttr timeoutAttr(timeoutStr);
if (iequals(timeoutAttr.unit, "s")) {
timeout = strTo<int>(timeoutAttr.value) * 1000;
} else if (iequals(timeoutAttr.unit, "ms")) {
timeout = strTo<int>(timeoutAttr.value);
}
if (timeout > 0) {
timeout += tthread::chrono::system_clock::now();
}
#endif
Event currEvent = _interpreter->getCurrentEvent();
Resubmitter::postpone(currEvent, until, 0, chained, _interpreter);
}
void PostponeElement::exitElement(const Arabica::DOM::Node<std::string>& node) {
}
void PostponeElement::Resubmitter::postpone(const Event& event, std::string until, uint64_t timeout, bool chained, InterpreterImpl* interpreter) {
Resubmitter* resubmitter = getInstance(interpreter);
resubmitter->_postponedEvents.push_back(Postponed(event, until, timeout, chained));
}
void PostponeElement::Resubmitter::onStableConfiguration(Interpreter interpreter) {
std::list<Postponed>::iterator eventIter = _postponedEvents.begin();
bool dispatched = false;
while(eventIter != _postponedEvents.end()) {
try {
// LOG(INFO) << "Reevaluating: >> " << eventIter->first << " <<";
if ((!dispatched || eventIter->chaining) && interpreter.getDataModel().evalAsBool(eventIter->until)) {
// LOG(INFO) << " -> is TRUE";
eventIter->event.name += ".postponed";
interpreter.receive(eventIter->event, true);
_postponedEvents.erase(eventIter++);
dispatched = true;
}
// LOG(INFO) << " -> is FALSE";
} catch (Event e) {
LOG(ERROR) << "Syntax error while evaluating until attribute of postpone element:" << std::endl << e << std::endl;
_postponedEvents.erase(eventIter++);
continue;
}
eventIter++;
}
// LOG(ERROR) << _postponedEvents.size() << " Postponess remaining";
}
void PostponeElement::Resubmitter::afterCompletion(Interpreter interpreter) {
tthread::lock_guard<tthread::recursive_mutex> lock(PostponeElement::Resubmitter::_accessLock);
_instances.erase(interpreter);
delete this; // committing suicide is ok if we are careful
}
std::map<Interpreter, PostponeElement::Resubmitter*> PostponeElement::Resubmitter::_instances;
tthread::recursive_mutex PostponeElement::Resubmitter::_accessLock;
PostponeElement::Resubmitter* PostponeElement::Resubmitter::getInstance(InterpreterImpl* interpreter) {
tthread::lock_guard<tthread::recursive_mutex> lock(PostponeElement::Resubmitter::_accessLock);
if (_instances.find(interpreter->shared_from_this()) == _instances.end()) {
_instances[interpreter->shared_from_this()] = new Resubmitter(interpreter);
}
return _instances[interpreter->shared_from_this()];
}
}
|
