org.springframework.batch.core.repository
Interface JobRepository

All Known Implementing Classes:

SimpleJobRepository

public interface JobRepository

Repository responsible for persistence of batch meta-data entities.

Author:

Lucas Ward, Dave Syer, Robert Kasanicky

See Also:

JobInstance, JobExecution, StepExecution

Method Summary

void	add(StepExecution stepExecution) Save the StepExecution and its ExecutionContext.
JobExecution	createJobExecution(String jobName, JobParameters jobParameters) Create a JobExecution for a given Job and JobParameters.
JobExecution	getLastJobExecution(String jobName, JobParameters jobParameters)
StepExecution	getLastStepExecution(JobInstance jobInstance, String stepName)
int	getStepExecutionCount(JobInstance jobInstance, String stepName)
boolean	isJobInstanceExists(String jobName, JobParameters jobParameters) Check if an instance of this job already exists with the parameters provided.
void	update(JobExecution jobExecution) Update the JobExecution (but not its ExecutionContext).
void	update(StepExecution stepExecution) Update the StepExecution (but not its ExecutionContext).
void	updateExecutionContext(JobExecution jobExecution) Persist the updated ExecutionContext of the given JobExecution.
void	updateExecutionContext(StepExecution stepExecution) Persist the updated ExecutionContexts of the given StepExecution.

Method Detail

isJobInstanceExists

boolean isJobInstanceExists(String jobName,
                            JobParameters jobParameters)

Check if an instance of this job already exists with the parameters provided.

Parameters:

jobName - the name of the job

jobParameters - the parameters to match

Returns:

true if a JobInstance already exists for this job name and job parameters

createJobExecution

JobExecution createJobExecution(String jobName,
                                JobParameters jobParameters)
                                throws JobExecutionAlreadyRunningException,
                                       JobRestartException,
                                       JobInstanceAlreadyCompleteException

Create a JobExecution for a given Job and JobParameters. If matching JobInstance already exists, the job must be restartable and it's last JobExecution must *not* be completed. If matching JobInstance does not exist yet it will be created.

If this method is run in a transaction (as it normally would be) with isolation level at Isolation.REPEATABLE_READ or better, then this method should block if another transaction is already executing it (for the same JobParameters and job name). The first transaction to complete in this scenario obtains a valid JobExecution, and others throw JobExecutionAlreadyRunningException (or timeout). There are no such guarantees if the JobInstanceDao and JobExecutionDao do not respect the transaction isolation levels (e.g. if using a non-relational data-store, or if the platform does not support the higher isolation levels).

Parameters:

jobName - the name of the job that is to be executed

jobParameters - the runtime parameters for the job

Returns:

a valid JobExecution for the arguments provided

Throws:

JobExecutionAlreadyRunningException - if there is a JobExecution already running for the job instance with the provided job and parameters.

JobRestartException - if one or more existing JobInstances is found with the same parameters and Job.isRestartable() is false.

JobInstanceAlreadyCompleteException - if a JobInstance is found and was already completed successfully.

update

void update(JobExecution jobExecution)

Update the JobExecution (but not its ExecutionContext). Preconditions: JobExecution must contain a valid JobInstance and be saved (have an id assigned).

Parameters:

jobExecution -

add

void add(StepExecution stepExecution)

Save the StepExecution and its ExecutionContext. ID will be assigned - it is not permitted that an ID be assigned before calling this method. Instead, it should be left blank, to be assigned by a JobRepository. Preconditions: StepExecution must have a valid Step.

Parameters:

stepExecution -

update

void update(StepExecution stepExecution)

Update the StepExecution (but not its ExecutionContext). Preconditions: StepExecution must be saved (have an id assigned).

Parameters:

stepExecution -

updateExecutionContext

void updateExecutionContext(StepExecution stepExecution)

Persist the updated ExecutionContexts of the given StepExecution.

Parameters:

stepExecution -

updateExecutionContext

void updateExecutionContext(JobExecution jobExecution)

Persist the updated ExecutionContext of the given JobExecution.

Parameters:

jobExecution -

getLastStepExecution

StepExecution getLastStepExecution(JobInstance jobInstance,
                                   String stepName)

Parameters:

stepName - the name of the step execution that might have run.

Returns:

the last execution of step for the given job instance.

getStepExecutionCount

int getStepExecutionCount(JobInstance jobInstance,
                          String stepName)

Parameters:

stepName - the name of the step execution that might have run.

Returns:

the execution count of the step within the given job instance.

getLastJobExecution

JobExecution getLastJobExecution(String jobName,
                                 JobParameters jobParameters)

Parameters:

jobName - the name of the job that might have run

jobParameters - parameters identifying the JobInstance

Returns:

the last execution of job if exists, null otherwise