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StepExecutor iterates over Chunks:

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feedback to throttle input

concurrent StepExecutor

Database

StepExecutor

feedback to signal completion

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concurrent StepExecutor

Database

Database

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tracks progressand manage restart data

En

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stor

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or

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Database

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stor

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concurrent StepExecutor

Database

Database

Database

tracks progressand manage restart data

Ent

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ntity

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StepExecutor

Step 1 Step 2

Step 2

Par

titio

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JobConfiguration

StepConfiguration

*

JobExecutor

StepExecutor

locates

RepeatOperations

CompletionPolicy

usesExceptionHandler

uses

requires 2: inner and outer loop

executes

other infrastructure dependencies

Application Developer

configures

JobExecutorFacade

controls

JobConfiguration

StepConfiguration

*

Tasklet

ItemProviderItemProcessor

uses

ExceptionHandler

StepExecutor concerns

uses

implementsApplication Developer

configures

RepeatOperations

JobConfiguration

StepConfiguration

*

JobExecutor

StepExecutor

locates

Infrastructure dependencies

executes

Application Developer

configures

JobLauncher

JobExecutorFacade

starts and stops

JobIdentifier

JobInstance

StepInstance

*

Database

stored in

recipe for

uses to identify and manage jobs

uses to construct jobs

executes

JobConfiguration

StepConfiguration*

JobExecutor

StepExecutor

locates

RepeatOperations

CompletionPolicy

usesExceptionHandler

uses

requires 2: inner and outer loop

executes

other implementations, e.g. partitioning, pipeline

JobLauncher

JobExecutorFacade

starts and stops

JobIdentifier

JobInstance

StepInstance

*

recipe for

uses to identify and manage jobs

uses to construct jobs

executesJobExecution

StepExecution

*

*

recipe for

SimpleStepExecutor

in-process implementation