Job chaining and batching in Laravel - Mini Project: Build & Apply

Job chaining and batching in Laravel

📖 Scenario: You are building a Laravel application that processes user data in steps. You want to run jobs one after another (chaining) and also run a group of jobs together (batching) to handle tasks efficiently.

🎯 Goal: Build a Laravel job chaining and batching setup that runs three jobs in sequence and groups them into a batch.

📋 What You'll Learn

Create three Laravel job classes named FirstJob, SecondJob, and ThirdJob.

Create a job batch that contains these three jobs.

Chain the jobs so that SecondJob runs after FirstJob, and ThirdJob runs after SecondJob.

Dispatch the batch with the chained jobs.

💡 Why This Matters

🌍 Real World

Job chaining and batching help run multiple background tasks in order and as a group, such as sending emails, processing files, or updating records.

💼 Career

Understanding Laravel job chaining and batching is important for backend developers to build efficient, scalable queue-based systems.

1

Create the three job classes

Create three Laravel job classes named FirstJob, SecondJob, and ThirdJob using the php artisan make:job command or by defining empty classes that implement ShouldQueue.

Laravel

// Create three job classes: FirstJob, SecondJob, ThirdJob
// Your code here

Need a hint?

Use the php artisan make:job JobName --queued command or create classes that implement ShouldQueue with the required traits.

2

Create a batch variable with the three jobs

Create a variable called $batch that uses Bus::batch() to create a batch containing new instances of FirstJob, SecondJob, and ThirdJob.

Laravel

<?php

// Create a batch variable called $batch with the three jobs inside Bus::batch([])
// Your code here

Need a hint?

Use Bus::batch([new FirstJob(), new SecondJob(), new ThirdJob()]) and assign it to $batch.

3

Chain the jobs in the batch

Modify the batch creation so that SecondJob runs after FirstJob, and ThirdJob runs after SecondJob by using the chain() method inside Bus::batch().

Laravel

<?php

// Chain the jobs so SecondJob runs after FirstJob, and ThirdJob runs after SecondJob
// Your code here

Need a hint?

Use Bus::batch([new FirstJob()])->chain([new SecondJob(), new ThirdJob()])->dispatch() to chain jobs.

4

Dispatch the batch with chained jobs

Ensure the batch with chained jobs is dispatched by calling dispatch() at the end of the batch and chain setup.

Laravel

<?php

// Confirm the batch is dispatched with the chained jobs
// Your code here

Need a hint?

Make sure to call dispatch() at the end to start the batch with chained jobs.