Using job parameters

In this recipe, you'll learn how to retrieve and use a job parameter value in Tasklet.

Getting ready

We'll use the job defined in the Creating a job recipe.

How to do it…

Follow these steps to use the job parameters:

1. In the Task1 class, add @StepScope to the execute() method:

   @StepScope
   public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext)
           throws Exception {
   ...

2. In the execute() method, retrieve a job parameter value by using the job parameter name:

   String test = (String)chunkContext.getStepContext().getJobParameters(). get("test")

3. Run the job with a parameter named test:

   mvn compile exec:java - Dexec.mainClass=org.springframework.batch.core.launch. support.CommandLineJobRunner - Dexec.args="com.spring_cookbook.batch.BatchConfig job1 test=hello"

How it works…

The String test will contain the hello parameter value passed on the command line. This recipe will also work if the job is launched from a controller method.