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Example code of darkjest/deferq

Informations about the package deferq

DeferQ

Документация на русском (README.ru.md)

Async task manager for PHP 8.4 with built-in deduplication, result caching (PSR-16), and callback notifications. Submit heavy tasks (report generation, data exports, etc.), and DeferQ will ensure each unique task runs only once, cache results for subsequent requests, and notify your application when work is done.

Installation

For Redis queue support:

For RabbitMQ queue support:

Quick Start

1. Configure DeferQ

2. Register Task Handlers

3. Dispatch a Task

4. Poll for Status

5. Run the Worker

Or use the CLI worker:

Deduplication

DeferQ prevents duplicate execution of identical tasks using fingerprinting:

  1. When you call dispatch(), DeferQ generates a SHA-256 fingerprint from the task name and canonically sorted parameters.
  2. If a result for this fingerprint already exists in cache, it returns immediately with TaskStatus::Completed.
  3. If a task with this fingerprint is already pending or running, the existing task's receipt is returned — no new task is created.
  4. Only if no cached result and no active task exist, a new task is created and queued.

This means 100 users requesting the same report simultaneously will trigger only a single execution.

Parameter key ordering does not matter — ['a' => 1, 'b' => 2] and ['b' => 2, 'a' => 1] produce the same fingerprint.

Callbacks

Callbacks are invoked by the worker after a task completes and its result is saved to cache. Implement CallbackInterface for production use:

Chain multiple callbacks with CallbackChain:

Callback failures are caught and logged — they never crash the worker.

Custom Queue Adapter

Implement QueueAdapterInterface to use any queue backend:

CLI Worker Bootstrap

Create a worker-bootstrap.php file that returns a configured Worker instance:

Then run:

Signal Handling

The CLI worker handles SIGTERM and SIGINT for graceful shutdown. When a signal is received, the worker finishes processing the current task before exiting.

Author

DarkJest

License

MIT

All versions of deferq with dependencies

PHP Build Version
Package Version
Requires php Version ^8.4
psr/simple-cache Version ^3.0
psr/log Version ^3.0
ramsey/uuid Version ^4.7
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