/**
* Have the engine start a new process instance.
*
* @param ProcessDefinition $definition
* @param Node $startNode
* @param string $businessKey
* @param array $variables
*/
public function __construct(ProcessDefinition $definition, Node $startNode, $businessKey = NULL, array $variables = [])
{
$this->definitionId = $definition->getId();
$this->startNodeId = $startNode->getId();
$this->businessKey = $businessKey === NULL ? NULL : (string) $businessKey;
$this->variables = serialize($variables);
}
/**
* Create a new persisted event subscription.
*
* @param string $name Name of the subscription type: "signal", "message", etc.
* @param VirtualExecution $execution Target execution.
* @param string $activityId ID of the activity that created the event subscription.
* @param Node $node Target node to receive the delegated signal or NULL in order to use the activity node.
* @param boolean $boundaryEvent Is this a subscription for a boundary event?
*/
public function __construct($name, VirtualExecution $execution, $activityId, Node $node = NULL, $boundaryEvent = false)
{
$this->name = (string) $name;
$this->executionId = $execution->getId();
$this->activityId = (string) $activityId;
$this->nodeId = $node === NULL ? NULL : (string) $node->getId();
$this->boundaryEvent = $boundaryEvent ? true : false;
}
protected function isReachable(Node $source, Node $target, Execution $execution, \SplObjectStorage $visited)
{
if ($source === $target) {
return true;
}
$model = $execution->getProcessModel();
$out = $model->findOutgoingTransitions($source->getId());
$visited->attach($source);
foreach ($out as $transition) {
$tmp = $model->findNode($transition->getTo());
if (!$visited->contains($tmp) && $this->isReachable($tmp, $target, $execution, $visited)) {
return true;
}
}
return false;
}
/**
* Perform logic needed to actually execute the node's behavior.
*
* @param Node $node
* @param Execution $execution
*/
protected function executeNode(Node $node, Execution $execution)
{
$node->getBehavior()->execute($execution);
}
/**
* Take all given transitions (or every transition when given NULL) recycling the given
* executions in the process.
*
* @param array<string> $transitions
* @param array<Execution> $recycle
*
* @throws \RuntimeException When the execution has been terminated.
*/
public function takeAll(array $transitions = NULL, array $recycle = [])
{
if ($this->isTerminated()) {
throw new \RuntimeException(sprintf('Cannot take transition in terminated %s', $this));
}
$this->engine->pushCommand(new CallbackCommand(function () use($transitions, $recycle) {
if ($this->isConcurrent()) {
if (1 === count($this->findConcurrentExecutions())) {
foreach ($recycle as $rec) {
foreach ($recycle as $rec) {
if ($rec !== $this) {
$rec->terminate(false);
}
}
}
foreach ($this->findChildExecutions() as $child) {
$this->parentExecution->registerChildExecution($child);
}
$this->parentExecution->node = $this->node;
$this->parentExecution->transition = $this->transition;
$this->parentExecution->setActive(true);
$this->engine->debug('Merged concurrent {execution} into {root}', ['execution' => (string) $this, 'root' => (string) $this->parentExecution]);
$this->terminate(false);
return $this->parentExecution->takeAll($transitions);
}
}
if ($transitions === NULL) {
$transitions = $this->getProcessModel()->findOutgoingTransitions($this->node->getId());
} else {
$transitions = array_map(function ($trans) {
return $trans instanceof Transition ? $trans : $this->getProcessModel()->findTransition($trans);
}, $transitions);
}
$transitions = array_filter($transitions, function (Transition $trans) {
return $trans->isEnabled($this);
});
if (!in_array($this, $recycle, true)) {
array_unshift($recycle, $this);
}
if (empty($transitions)) {
foreach ($recycle as $rec) {
if ($rec !== $this) {
$rec->terminate(false);
}
}
if ($this->isConcurrent() && 0 == count($this->findConcurrentExecutions())) {
$this->parentExecution->setActive(true);
$this->terminate(false);
return $this->parentExecution->terminate();
}
$this->terminate();
return;
}
$root = $this->isConcurrent() ? $this->parentExecution : $this;
$merge = count($root->findChildExecutions()) == count($root->findChildExecutions($this->node));
$active = [];
foreach ($root->findChildExecutions() as $exec) {
if ($exec->isActive()) {
$active[] = $exec;
}
}
$recycle = array_filter($recycle, function (Execution $execution) use($root) {
return $execution !== $root;
});
if (count($transitions) == 1 && empty($active) && $merge) {
$terminated = 0;
foreach ($recycle as $rec) {
if (!$rec->isTerminated()) {
$rec->terminate(false);
$terminated++;
}
}
$this->setState(self::STATE_CONCURRENT, false);
$root->setNode($this->node);
$root->setActive(true);
if ($terminated > 0) {
$this->engine->debug('Merged {count} concurrent executions into {execution}', ['count' => $terminated, 'execution' => (string) $root]);
}
$this->markModified(true);
return $root->take(array_shift($transitions));
}
$outgoing = [];
while (!empty($transitions)) {
$transition = array_shift($transitions);
if (empty($recycle)) {
$exec = $root->createExecution(true);
} else {
$exec = array_shift($recycle);
}
$exec->setActive(true);
$exec->setNode($this->node);
$exec->setState(self::STATE_CONCURRENT, true);
$outgoing[] = [$exec, $transition];
}
$root->setActive(false);
foreach ($recycle as $rec) {
$rec->terminate(false);
}
foreach ($outgoing as $out) {
$out[0]->take($out[1]);
}
}));
}
/**
* Perform logic to actually signal the execution.
*
* @param Node $node
* @param Execution $execution
* @param array $vars
* @param array $delegation
*/
protected function singalExecution(Node $node, Execution $execution, array $vars, array $delegation)
{
$behavior = $node->getBehavior();
if ($behavior instanceof SignalableBehaviorInterface) {
$behavior->signal($execution, $this->signal, $vars, $delegation);
}
}
