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NuanceItemUpdateWorker.php
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Created
Wed, Feb 19, 23:44

NuanceItemUpdateWorker.php
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<?php
final class NuanceItemUpdateWorker
extends NuanceWorker {
protected function doWork() {
$item_phid = $this->getTaskDataValue('itemPHID');
$lock = $this->newLock($item_phid);
$lock->lock(1);
try {
$item = $this->loadItem($item_phid);
$this->updateItem($item);
$this->routeItem($item);
$this->applyCommands($item);
} catch (Exception $ex) {
$lock->unlock();
throw $ex;
}
$lock->unlock();
}
private function updateItem(NuanceItem $item) {
$impl = $item->getImplementation();
if (!$impl->canUpdateItems()) {
return null;
}
$viewer = $this->getViewer();
$impl->setViewer($viewer);
$impl->updateItem($item);
}
private function routeItem(NuanceItem $item) {
$status = $item->getStatus();
if ($status != NuanceItem::STATUS_ROUTING) {
return;
}
$source = $item->getSource();
// For now, always route items into the source's default queue.
$item
->setQueuePHID($source->getDefaultQueuePHID())
->setStatus(NuanceItem::STATUS_OPEN)
->save();
}
private function applyCommands(NuanceItem $item) {
$viewer = $this->getViewer();
$commands = id(new NuanceItemCommandQuery())
->setViewer($viewer)
->withItemPHIDs(array($item->getPHID()))
->withStatuses(
array(
NuanceItemCommand::STATUS_ISSUED,
))
->execute();
$commands = msort($commands, 'getID');
$this->executeCommandList($item, $commands);
}
public function executeCommands(NuanceItem $item, array $commands) {
if (!$commands) {
return true;
}
$item_phid = $item->getPHID();
$viewer = $this->getViewer();
$lock = $this->newLock($item_phid);
try {
$lock->lock(1);
} catch (PhutilLockException $ex) {
return false;
}
try {
$item = $this->loadItem($item_phid);
// Reload commands now that we have a lock, to make sure we don't
// execute any commands twice by mistake.
$commands = id(new NuanceItemCommandQuery())
->setViewer($viewer)
->withIDs(mpull($commands, 'getID'))
->execute();
$this->executeCommandList($item, $commands);
} catch (Exception $ex) {
$lock->unlock();
throw $ex;
}
$lock->unlock();
return true;
}
private function executeCommandList(NuanceItem $item, array $commands) {
$viewer = $this->getViewer();
$executors = NuanceCommandImplementation::getAllCommands();
foreach ($commands as $command) {
if ($command->getItemPHID() !== $item->getPHID()) {
throw new Exception(
pht('Trying to apply a command to the wrong item!'));
}
if ($command->getStatus() !== NuanceItemCommand::STATUS_ISSUED) {
// Never execute commands which have already been issued.
continue;
}
$command
->setStatus(NuanceItemCommand::STATUS_EXECUTING)
->save();
try {
$command_key = $command->getCommand();
$executor = idx($executors, $command_key);
if (!$executor) {
throw new Exception(
pht(
'Unable to execute command "%s": this command does not have '.
'a recognized command implementation.',
$command_key));
}
$executor = clone $executor;
$executor
->setActor($viewer)
->applyCommand($item, $command);
$command
->setStatus(NuanceItemCommand::STATUS_DONE)
->save();
} catch (Exception $ex) {
$command
->setStatus(NuanceItemCommand::STATUS_FAILED)
->save();
throw $ex;
}
}
}
private function newLock($item_phid) {
$hash = PhabricatorHash::digestForIndex($item_phid);
$lock_key = "nuance.item.{$hash}";
return PhabricatorGlobalLock::newLock($lock_key);
}
}

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