/**
* {@inheritdoc}
*/
public function execute(Execution $execution)
{
$execution->setActive(false);
$numberExecutions = count($execution->getProcessModel()->findIncomingTransitions($execution->getNode()->getId()));
// Collect recycled executions, initialize with current execution:
$recycle = [$execution->getTransition()->getId() => $execution];
foreach ($execution->findInactiveConcurrentExecutions($execution->getNode()) as $concurrent) {
// Collect at most 1 execution per incoming transition.
$transId = $concurrent->getTransition()->getId();
if (empty($recycle[$transId]) || $concurrent->getTimestamp() < $recycle[$transId]->getTimestamp()) {
$recycle[$transId] = $concurrent;
}
}
if (count($recycle) !== $numberExecutions) {
return;
}
return $execution->takeAll(NULL, $recycle);
}
/**
* 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]);
}
}));
}
