50 lines
1.7 KiB
PHP
50 lines
1.7 KiB
PHP
|
<?php
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Provide a way to set simple transient locks to block behaviour
|
||
|
|
* for up-to a given duration.
|
||
|
|
*
|
||
|
|
* Class ActionScheduler_OptionLock
|
||
|
|
* @since 3.0.0
|
||
|
|
*/
|
||
|
|
class ActionScheduler_OptionLock extends ActionScheduler_Lock {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set a lock using options for a given amount of time (60 seconds by default).
|
||
|
|
*
|
||
|
|
* Using an autoloaded option avoids running database queries or other resource intensive tasks
|
||
|
|
* on frequently triggered hooks, like 'init' or 'shutdown'.
|
||
|
|
*
|
||
|
|
* For example, ActionScheduler_QueueRunner->maybe_dispatch_async_request() uses a lock to avoid
|
||
|
|
* calling ActionScheduler_QueueRunner->has_maximum_concurrent_batches() every time the 'shutdown',
|
||
|
|
* hook is triggered, because that method calls ActionScheduler_QueueRunner->store->get_claim_count()
|
||
|
|
* to find the current number of claims in the database.
|
||
|
|
*
|
||
|
|
* @param string $lock_type A string to identify different lock types.
|
||
|
|
* @bool True if lock value has changed, false if not or if set failed.
|
||
|
|
*/
|
||
|
|
public function set( $lock_type ) {
|
||
|
|
return update_option( $this->get_key( $lock_type ), time() + $this->get_duration( $lock_type ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* If a lock is set, return the timestamp it was set to expiry.
|
||
|
|
*
|
||
|
|
* @param string $lock_type A string to identify different lock types.
|
||
|
|
* @return bool|int False if no lock is set, otherwise the timestamp for when the lock is set to expire.
|
||
|
|
*/
|
||
|
|
public function get_expiration( $lock_type ) {
|
||
|
|
return get_option( $this->get_key( $lock_type ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Get the key to use for storing the lock in the transient
|
||
|
|
*
|
||
|
|
* @param string $lock_type A string to identify different lock types.
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
protected function get_key( $lock_type ) {
|
||
|
|
return sprintf( 'action_scheduler_lock_%s', $lock_type );
|
||
|
|
}
|
||
|
|
}
|