Explain the spring batch framework architecture.

Job is an entity that encapsulates the entire batch process and acts as a container for steps. A job combines multiple steps that belong logically together in a flow and allows for configuration of properties global to all steps such as restartability.

A job is wired using an XML configuration or java based configuration and it is referred as Job configuration.

The job configuration contains:

• The name of the job.
• Definition and ordering of steps.
• Whether or not the job is restartable.

JobInstance represents a logical job run. Consider a batch job that runs every night, there is a logical JobInstance running everyday.

JobParameters are set of parameters used to start a batch Job. They also distinguish JobInstance from another.

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