OClock

Explore the details of scheduled events in a Laravel application.

What is this?

There are times when you have too many schedules registered to run at different times, be it in the same application or multiple applications, i.e. in a micro-services architecture where multiple services have their work scheduled to perform different events at different times, it becomes crucial to have one central place that can navigate these scheduled events from across the different applications (services, projects, etc.). The way OClock achieves this is as follows:

Definitions

• Source: The application/project where the events have been defined and scheduled.
• Event: Is a scheduled event that includes the command and Cron expression that defines its running schedule.
• Session: A single run of a scheduled Event. i.e. if an Event is scheduled to run every five minutes each of these runs throughout the day is a Session.
• Schedule: A collection of Events with their Source information.

1. Send the session output to a file where we can read them later
2. Set the before hook on each of the events to store their session information in the database every time they start.
3. Set the after hook on each of the events to:
   • update their session information and mark the session as done, meanwhile the running status flag is_running will be marked as true.
   • Read the session output from the file and add it to the Session record in the database
   • Remove the file

Requirements

• MongoDB Extension

Installation

composer require vinelab/oclock

Configuration

• Add the service provider OClock\OClockServiceProvider::class, to the providers array in config/app.php
• Add the mongodb configuration to config/database.php as follows:

'default' => env('DB_CONNECTION', 'mongodb'),

'connections' => [

    'mongodb' => [
        'driver'   => 'mongodb',
        'host'     => env('DB_HOST', 'localhost'),
        'port'     => env('DB_PORT', 27017),
        'database' => env('DB_DATABASE', 'logs'),
        'username' => env('DB_USERNAME'),
        'password' => env('DB_PASSWORD'),
        'options' => [
            'database' => 'admin' // sets the authentication database required by mongo 3
        ]
    ],
]

• Update .env file with the correct parameters

# MongoDB
DB_HOST=localhost
DB_PORT=27017
DB_DATABASE=logs
DB_USERNAME=
DB_PASSWORD=

Usage

Setup

• In the schedule method of app/Console/Kernel.php add the following to the bottom (after all the schedules have been defined):

protected function schedule(Schedule $schedule)
{
    // register schedules here

    // ...

    OClock::register($schedule);
}

Make sure you import the facade by adding use OClock; to the top of the file.

Methods

• OClock::sessions: Get all the stored sessions
• OClock::sessionsByDay: Get all the sessions grouped by day
• OClock::sessionsForEvent($eventId): Get the sessions for the given event