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Example code of seankndy/daemon

Informations about the package daemon

Installing

Usage overview

On each iteration of the main loop, producers are called which should provide a task to fork/run.

Producers can be callables or objects that implement SeanKndy\Daemon\Tasks\Producer. Producers should return null if there is no task to perform otherwise a SeanKndy\Daemon\Tasks\Task or callable. SeanKndy\Daemon\Tasks\Task has 3 methods:

init() - Called from parent process just before child is forked.

run() - Called from within forked process (child work)

finish(int $status) - Called from parent when process exits

So if you need to perform any initialization or teardown of as children are spawned/exiting, then you'll want to make your own task classes implementing SeanKndy\Daemon\Tasks\Task rather than using a simple closure.

There are various events you can listen for (use SeanKndy\Daemon\Daemon::addListener()):

SeanKndy\Daemon\DaemonEvent::START - When daemon starts

SeanKndy\Daemon\DaemonEvent::STOP - When daemon stops

SeanKndy\Daemon\DaemonEvent::DAEMONIZED - When daemonized (backgrounded)

SeanKndy\Daemon\DaemonEvent::LOOP_ITERATION - Called at the end of each loop iteration

SeanKndy\Daemon\Processes\Event::START - New process started

SeanKndy\Daemon\Processes\Event::EXIT - New process exited

SeanKndy\Daemon\Processes\Event::ITERATION - Every main loop iteration this is fired for each running process

Inter-process Communication example

You can use \SeanKndy\Daemon\IPC\Socket to send message from child to parent using socket pairs. Here is an example of doing that:

All versions of daemon with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
clue/socket-raw Version >=1.3
symfony/event-dispatcher Version ^4.1
psr/log Version ^3.0
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