Spring Batch - Difference between Step, Chunk and Tasklet
A Step is a domain object that encapsulates an independent, sequential phase of a batch job and contains all of the information necessary to define and control the actual batch processing.Spring Batch - Table Of Contents
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Steps can be processed in either of the following two ways.
- Chunk
- Tasklet
| Parameter | Tasklet | Chunk |
|---|---|---|
| When to use | Suppose the job to be run a single granular task then Tasklet processing is used. | Suppose the job to be run is complex and involves executing of tasks involving reads, processing and writes the we use chunk oriented processing |
| How it works | No aggregation, just the task gets executed. | It involves reading an input, processing it based on the business logic and then aggregating it till the commit-interval is reached and finally writing out the chunk of data output to a file or database table. |
| Usage | Its not used commonly. | Its the most common way of executing a Step. |
| Use Case | Usually Used in scenarios invloving a single task like deleting a resource or executing a query . | Usually used in scenarios where multiple aggregated steps need to be run like copying, processing and transferring of data . |
| Example | <job id="taskletJob">
<step id="callingStoredProc">
<tasklet ref="callProc"/>
</step>
</job> Spring Batch Tasklet Example |
<job id="sampleJob" job-repository="jobRepository">
<step id="step1">
<tasklet transaction-manager="transactionManager">
<chunk reader="itemReader" writer="itemWriter" commit-interval="10"/>
</tasklet>
</step>
</job> Spring Batch Chunk Processing Example |
| Parameter | Chunk |
|---|---|
| When to use | Suppose the job to be run is complex and involves executing of tasks involving reads, processing and writes the we use chunk oriented processing |
| How it works | It involves reading an input, processing it based on the business logic and then aggregating it till the commit-interval is reached and finally writing out the chunk of data output to a file or database table. |
| Usage | Its the most common way of executing a Step. |
| Use Case | Usually used in scenarios where multiple aggregated steps need to be run like copying, processing and transferring of data . |
| Example | <job id="sampleJob" job-repository="jobRepository">
<step id="step1">
<tasklet transaction-manager="transactionManager">
<chunk reader="itemReader" writer="itemWriter" commit-interval="10"/>
</tasklet>
</step>
</job> Spring Batch Chunk Processing Example |
See Also
Spring Batch Main Menu