README

Job chains powered by cache for Laravel.

installation

composer require datashaman/job-chain

instrumentation

use Datashaman\JobChain\HasJobChain;

class MyJob
{
    use HasJobChain;

    public handle()
    {
        // do things
        $value = 'my job has run';

        $this->done($value);
    }
}

configuration

return [
    /**
     * Job chain loader will search through these paths for chain files.
     */
    'paths' => [
        base_path('chains'),
    ],

    /**
     * Cache store use for holding chain state.
     */
    'cache' => env('JOB_CHAIN_CACHE', env('CACHE_DRIVER', 'file')),

    /**
     * Cache item lifetime. This must be longer than the total expected
     * run time for any chain.
     *
     * This can overridden per chain.
     */
    'lifetime' = env('JOB_CHAIN_LIFETIME', 60 * 60 * 24),
];

usage

Given this file chains/chain1.yml:

done: jobThree

lifetime: 86400

jobs:
  jobOne:
    type: JobOne
  jobTwo:
    type: JobTwo
    params:
      documents: !job jobOne
  jobThree:
    type: JobThree
    params:
      documents: !job jobTwo

And these three test job class:

use Datashaman\JobChain\HasJobChain;

class JobOne
{
    use HasJobChain;

    public function handle()
    {
        $this->done('JobOne has run');
    }
}

class JobTwo
{
    use HasJobChain;

    public function handle()
    {
        $this->done('JobTwo has run');
    }
}

class JobThree
{
    use HasJobChain;

    public function handle()
    {
        $this->done('JobThree has run');
    }
}

When you run this code:

use JobChain;

Event::listen(function (JobChainDone $event) {
    logger()->info('Job chain done', [
        'jobChain' => $event->jobChain,
        'value' => $event->value,
    ]);
});

JobChain::run('chain1');

Execution will flow sequentially through JobOne, JobTwo and JobThree because of the dependency graph denoted by using a custom type of !job in the YAML definition.

The event listener should receive a value of JobThree has run which is the value the done job has submitted.

If the chain does not define a done job, it is assumed to be the last job in the definition.

Test build.