Spring Batch Intro

In this article, we’ll take a look at an introduction to Spring Batch. Spring Batch is a framework designed to process large amounts of data or batches of data.

There are three main things going on in a batch process. We read data from a source, perform some sort of processing on it, and finally, we write that data somewhere. This happens in what’s called a job.

Spring Batch Job

Spring Batch jobs enable us to write code that will perform a certain task. For example, we could have a job that sends newsletter emails to all users in a database or a job that reads data from a CSV file and writes it to a database.

We create jobs using the JobBuilderFactory. We define the name of the job by passing the name to the get method. We concatenate a random number so that we can re-run the app if this job fails. The example below shows a job that has one step.

Spring Batch Step

A Spring Batch job can have one or more steps. A step is a specific phase of a job in that we could have one functionality in the first step of a given job, and have another functionality in the next. These steps can be run in sequence…