Access JobContext from a partitioned step in JSR 352

Question

I am trying to pass an object between packages, but I ran into a problem while trying to access the context job from a partitioned step (batch program).

According to JSR 352 specification

9.4.1.1 Life cycle and batch context context: A batch context has thread similarity and is displayed only for a batch of artifacts running on that particular thread. An incentivized batch context field may be blank if it is out of scope. Each type of context has a scale and a life cycle as follows: 1. JobContext There is one JobContext for the job. He exists for life to work. There is a separate JobContext for each substream parallel execution (for example, a partitioned step). 2. StepContext There is one StepContext action for each step. He exists for life. Step. For a partitioned step, there is one StepContext for the parent step / stream; There is a separate StepContext for each substream.

My (unsuccessful) solution was to use JobContext.setTransientUserData, but since the partitioned step uses a separate JobContext, I cannot get TransientUserData.

Is there an alternative to what I'm trying to do? Using the PartitionMapper properties is not possible because I need to pass an object, not a string, for each section.

To be clear, I need to do the following:

• NormalBatchlet → Save the object that will be used in the next step.
• PartitionedBatchlet -> Get the saved object in the previous step. This object is not a simple string, so using PartitionMapper properties is not a solution.

UPDATE

Now I use a simple Singleton EJB with a HashMap to store objects between stages and when the task is completed. I clean this card to avoid resource leakage.

, javax.batch EJB, .

Answer 1

- , .

, NormalBatchlet:

stepCtx.setPersistentUserData(mySerializableData);

, :

Long execId = jobCtx.getExecutionId();

List<StepExecution> stepExecs = jobOperator.getStepExecutions(execID);

MyPersistentUserData myData;

for (StepExecution step : stepExecs) {
    if (step.getStepName().equals("somePreviousStepX") {
        myData = (MyPersistentUserData)step.getPersistentUserData();
    }
}

//use myData

Answer 2

JobContext JobContext () . , .

Answer 3

Context - Injection. . 9.4.1.

"9.4.1

@Inject (javax.inject.Inject). , , .

:.

@Inject JobContext _jctxt;

@Inject StepContext _sctxt;

.