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PhabricatorWorkerTrigger.php
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Sun, Aug 4, 09:14

PhabricatorWorkerTrigger.php
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<?php
final class PhabricatorWorkerTrigger
extends PhabricatorWorkerDAO
implements
PhabricatorDestructibleInterface,
PhabricatorPolicyInterface {
protected $triggerVersion;
protected $clockClass;
protected $clockProperties;
protected $actionClass;
protected $actionProperties;
private $action = self::ATTACHABLE;
private $clock = self::ATTACHABLE;
private $event = self::ATTACHABLE;
protected function getConfiguration() {
return array(
self::CONFIG_TIMESTAMPS => false,
self::CONFIG_AUX_PHID => true,
self::CONFIG_SERIALIZATION => array(
'clockProperties' => self::SERIALIZATION_JSON,
'actionProperties' => self::SERIALIZATION_JSON,
),
self::CONFIG_COLUMN_SCHEMA => array(
'triggerVersion' => 'uint32',
'clockClass' => 'text64',
'actionClass' => 'text64',
),
self::CONFIG_KEY_SCHEMA => array(
'key_trigger' => array(
'columns' => array('triggerVersion'),
'unique' => true,
),
),
) + parent::getConfiguration();
}
public function save() {
$conn_w = $this->establishConnection('w');
$this->openTransaction();
$next_version = LiskDAO::loadNextCounterValue(
$conn_w,
PhabricatorTriggerDaemon::COUNTER_VERSION);
$this->setTriggerVersion($next_version);
$result = parent::save();
$this->saveTransaction();
return $this;
}
public function generatePHID() {
return PhabricatorPHID::generateNewPHID(
PhabricatorWorkerTriggerPHIDType::TYPECONST);
}
/**
* Return the next time this trigger should execute.
*
* This method can be called either after the daemon executed the trigger
* successfully (giving the trigger an opportunity to reschedule itself
* into the future, if it is a recurring event) or after the trigger itself
* is changed (usually because of an application edit). The `$is_reschedule`
* parameter distinguishes between these cases.
*
* @param int|null Epoch of the most recent successful event execution.
* @param bool `true` if we're trying to reschedule the event after
* execution; `false` if this is in response to a trigger update.
* @return int|null Return an epoch to schedule the next event execution,
* or `null` to stop the event from executing again.
*/
public function getNextEventEpoch($last_epoch, $is_reschedule) {
return $this->getClock()->getNextEventEpoch($last_epoch, $is_reschedule);
}
/**
* Execute the event.
*
* @param int|null Epoch of previous execution, or null if this is the first
* execution.
* @param int Scheduled epoch of this execution. This may not be the same
* as the current time.
* @return void
*/
public function executeTrigger($last_event, $this_event) {
return $this->getAction()->execute($last_event, $this_event);
}
public function getEvent() {
return $this->assertAttached($this->event);
}
public function attachEvent(PhabricatorWorkerTriggerEvent $event = null) {
$this->event = $event;
return $this;
}
public function setAction(PhabricatorTriggerAction $action) {
$this->actionClass = get_class($action);
$this->actionProperties = $action->getProperties();
return $this->attachAction($action);
}
public function getAction() {
return $this->assertAttached($this->action);
}
public function attachAction(PhabricatorTriggerAction $action) {
$this->action = $action;
return $this;
}
public function setClock(PhabricatorTriggerClock $clock) {
$this->clockClass = get_class($clock);
$this->clockProperties = $clock->getProperties();
return $this->attachClock($clock);
}
public function getClock() {
return $this->assertAttached($this->clock);
}
public function attachClock(PhabricatorTriggerClock $clock) {
$this->clock = $clock;
return $this;
}
/**
* Predict the epoch at which this trigger will next fire.
*
* @return int|null Epoch when the event will next fire, or `null` if it is
* not planned to trigger.
*/
public function getNextEventPrediction() {
// NOTE: We're basically echoing the database state here, so this won't
// necessarily be accurate if the caller just updated the object but has
// not saved it yet. That's a weird use case and would require more
// gymnastics, so don't bother trying to get it totally correct for now.
if ($this->getEvent()) {
return $this->getEvent()->getNextEventEpoch();
} else {
return $this->getNextEventEpoch(null, $is_reschedule = false);
}
}
/* -( PhabricatorDestructibleInterface )----------------------------------- */
public function destroyObjectPermanently(
PhabricatorDestructionEngine $engine) {
$this->openTransaction();
queryfx(
$this->establishConnection('w'),
'DELETE FROM %T WHERE triggerID = %d',
id(new PhabricatorWorkerTriggerEvent())->getTableName(),
$this->getID());
$this->delete();
$this->saveTransaction();
}
/* -( PhabricatorPolicyInterface )----------------------------------------- */
// NOTE: Triggers are low-level infrastructure and do not have real
// policies, but implementing the policy interface allows us to use
// infrastructure like handles.
public function getCapabilities() {
return array(
PhabricatorPolicyCapability::CAN_VIEW,
);
}
public function getPolicy($capability) {
return PhabricatorPolicies::getMostOpenPolicy();
}
public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
return true;
}
public function describeAutomaticCapability($capability) {
return null;
}
}

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