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Informations about the package queue
Journey Queue
Queue is a simple, hierarchical action-test-callback queue written in php. The php thread waits however long is necessary in order to complete the entire queue (using Journey\Daemon).
Install
Use composer to install it and load it.
Use
The queue is made up of a registry of QueueItem objects. Each QueueItem has 3 elements:
- Action
__construct(Callable)setAction(Callable)
- Check
unitl(Callable)succeedWhen(Callable)
- Callback
then(Callable)after(Callable)
The queue first performs the action. The queue will then call the check to determine if the action has completed until it receives a truthy value. Finally the queue will call the callback after the check passes.
To create hierarchy, simply add another QueueItem in the success callback (then() in the above example). $queue->add(new QueueItem...)
Note: The check methods also support a second parameter (optional) $interval = 0 which defines how frequently each check should wait before being called again (non-blocking). An example of how this would be useful is if you are calling a request-limited API for a status and you only want to check ever 30 seconds rather than 30 times a second
