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#include "PostponeElement.h"
#include "uscxml/plugins/invoker/http/HTTPServletInvoker.h"
#include <glog/logging.h>
#ifdef BUILD_AS_PLUGINS
#include <Pluma/Connector.hpp>
#endif
namespace uscxml {
#ifdef BUILD_AS_PLUGINS
PLUMA_CONNECTOR
bool connect(pluma::Host& host) {
host.add( new PostponeElementProvider() );
return true;
}
#endif
boost::shared_ptr<ExecutableContentImpl> PostponeElement::create(Interpreter* 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;
}
}
// 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 (boost::iequals(timeoutAttr.unit, "s")) {
timeout = strTo<int>(timeoutAttr.value) * 1000;
} else if (boost::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, _interpreter);
}
void PostponeElement::exitElement(const Arabica::DOM::Node<std::string>& node) {
}
void PostponeElement::Resubmitter::postpone(const Event& event, std::string until, uint64_t timeout, Interpreter* interpreter) {
Resubmitter* resubmitter = getInstance(interpreter);
resubmitter->_postponedEvents.push_back(Postponed(event, until, timeout));
}
void PostponeElement::Resubmitter::onStableConfiguration(Interpreter* interpreter) {
std::list<Postponed>::iterator eventIter = _postponedEvents.begin();
while(eventIter != _postponedEvents.end()) {
try {
// LOG(INFO) << "Reevaluating: >> " << eventIter->first << " <<";
if (eventIter->timeout > 0 && tthread::chrono::system_clock::now() < eventIter->timeout) {
// TODO: We should use an event queue
// LOG(INFO) << " -> Timeout";
eventIter->event.name += ".timeout";
interpreter->receive(eventIter->event, true);
_postponedEvents.erase(eventIter);
break;
}
if (interpreter->getDataModel().evalAsBool(eventIter->until)) {
// LOG(INFO) << " -> is TRUE";
eventIter->event.name += ".postponed";
interpreter->receive(eventIter->event, true);
_postponedEvents.erase(eventIter);
break;
}
// 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(Interpreter* interpreter) {
tthread::lock_guard<tthread::recursive_mutex> lock(PostponeElement::Resubmitter::_accessLock);
if (_instances.find(interpreter) == _instances.end()) {
_instances[interpreter] = new Resubmitter(interpreter);
}
return _instances[interpreter];
}
}
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