org.springframework.batch.core.launch.support

Class SimpleJobOperator

java.lang.Object

org.springframework.batch.core.launch.support.SimpleJobOperator

All Implemented Interfaces:

JobOperator, org.springframework.beans.factory.InitializingBean

public class SimpleJobOperator
extends Object
implements JobOperator, org.springframework.beans.factory.InitializingBean

Simple implementation of the JobOperator interface. Due to the amount of functionality the implementation is combining, the following dependencies are required:

• JobLauncher
• JobExplorer
• JobRepository
• JobRegistry

Since:

2.0

Author:

Dave Syer, Lucas Ward

Constructor Summary

Constructors

Constructor and Description
SimpleJobOperator()

Method Summary

Methods

Modifier and Type	Method and Description
JobExecution	abandon(long jobExecutionId) Mark the JobExecution as ABANDONED.
void	afterPropertiesSet() Check mandatory properties.
List<Long>	getExecutions(long instanceId) List the JobExecutions associated with a particular JobInstance, in reverse order of creation (and therefore usually of execution).
List<Long>	getJobInstances(String jobName, int start, int count) List the JobInstances for a given job name, in reverse order of creation (and therefore usually of first execution).
Set<String>	getJobNames() List the available job names that can be launched with JobOperator.start(String, String).
String	getParameters(long executionId) Get the JobParameters as an easily readable String.
Set<Long>	getRunningExecutions(String jobName) Get the id values of all the running JobExecutions with the given job name.
Map<Long,String>	getStepExecutionSummaries(long executionId) Summarise the StepExecution instances belonging to the JobExecution with the supplied id, giving details of status, start and end times etc.
String	getSummary(long executionId) Summarise the JobExecution with the supplied id, giving details of status, start and end times etc.
Long	restart(long executionId) Restart a failed or stopped JobExecution.
void	setJobExplorer(JobExplorer jobExplorer) Public setter for the JobExplorer.
void	setJobLauncher(JobLauncher jobLauncher) Public setter for the JobLauncher.
void	setJobParametersConverter(JobParametersConverter jobParametersConverter) Public setter for the JobParametersConverter.
void	setJobRegistry(ListableJobLocator jobRegistry) Public setter for the ListableJobLocator.
void	setJobRepository(JobRepository jobRepository)
Long	start(String jobName, String parameters) Start a new instance of a job with the parameters specified.
Long	startNextInstance(String jobName) Launch the next in a sequence of JobInstance determined by the JobParametersIncrementer attached to the specified job.
boolean	stop(long executionId) Send a stop signal to the JobExecution with the supplied id.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SimpleJobOperator

public SimpleJobOperator()

Method Detail

afterPropertiesSet

public void afterPropertiesSet()
                        throws Exception

Check mandatory properties.

Specified by:

afterPropertiesSet in interface org.springframework.beans.factory.InitializingBean

Throws:

Exception

See Also:

InitializingBean.afterPropertiesSet()

setJobParametersConverter

public void setJobParametersConverter(JobParametersConverter jobParametersConverter)

Public setter for the JobParametersConverter.

Parameters:

jobParametersConverter - the JobParametersConverter to set

setJobRegistry

public void setJobRegistry(ListableJobLocator jobRegistry)

Public setter for the ListableJobLocator.

Parameters:

jobRegistry - the ListableJobLocator to set

setJobExplorer

public void setJobExplorer(JobExplorer jobExplorer)

Public setter for the JobExplorer.

Parameters:

jobExplorer - the JobExplorer to set

setJobRepository

public void setJobRepository(JobRepository jobRepository)

setJobLauncher

public void setJobLauncher(JobLauncher jobLauncher)

Public setter for the JobLauncher.

Parameters:

jobLauncher - the JobLauncher to set

getExecutions

public List<Long> getExecutions(long instanceId)
                         throws NoSuchJobInstanceException

Description copied from interface: JobOperator

List the JobExecutions associated with a particular JobInstance, in reverse order of creation (and therefore usually of execution).

Specified by:

getExecutions in interface JobOperator

Parameters:

instanceId - the id of a JobInstance

Returns:

the id values of all the JobExecutions associated with this instance

Throws:

NoSuchJobInstanceException

getJobNames

public Set<String> getJobNames()

Description copied from interface: JobOperator

List the available job names that can be launched with JobOperator.start(String, String).

Specified by:

getJobNames in interface JobOperator

Returns:

a set of job names

getJobInstances

public List<Long> getJobInstances(String jobName,
                         int start,
                         int count)
                           throws NoSuchJobException

Description copied from interface: JobOperator

List the JobInstances for a given job name, in reverse order of creation (and therefore usually of first execution).

Specified by:

getJobInstances in interface JobOperator

Parameters:

jobName - the job name that all the instances have

start - the start index of the instances

count - the maximum number of values to return

Returns:

the id values of the JobInstances

Throws:

NoSuchJobException

getParameters

public String getParameters(long executionId)
                     throws NoSuchJobExecutionException

Description copied from interface: JobOperator

Get the JobParameters as an easily readable String.

Specified by:

getParameters in interface JobOperator

Parameters:

executionId - the id of an existing JobExecution

Returns:

the job parameters that were used to launch the associated instance

Throws:

NoSuchJobExecutionException - if the id was not associated with any JobExecution

getRunningExecutions

public Set<Long> getRunningExecutions(String jobName)
                               throws NoSuchJobException

Description copied from interface: JobOperator

Get the id values of all the running JobExecutions with the given job name.

Specified by:

getRunningExecutions in interface JobOperator

Parameters:

jobName - the name of the job to search under

Returns:

the id values of the running JobExecution instances

Throws:

NoSuchJobException - if there are no JobExecutions with that job name

getStepExecutionSummaries

public Map<Long,String> getStepExecutionSummaries(long executionId)
                                           throws NoSuchJobExecutionException

Description copied from interface: JobOperator

Summarise the StepExecution instances belonging to the JobExecution with the supplied id, giving details of status, start and end times etc.

Specified by:

getStepExecutionSummaries in interface JobOperator

Parameters:

executionId - the id of an existing JobExecution

Returns:

a map of step execution id to String summarising the state of the execution

Throws:

NoSuchJobExecutionException - if there is no JobExecution with the supplied id

getSummary

public String getSummary(long executionId)
                  throws NoSuchJobExecutionException

Description copied from interface: JobOperator

Summarise the JobExecution with the supplied id, giving details of status, start and end times etc.

Specified by:

getSummary in interface JobOperator

Parameters:

executionId - the id of an existing JobExecution

Returns:

a String summarising the state of the job execution

Throws:

NoSuchJobExecutionException - if there is no JobExecution with the supplied id

restart

public Long restart(long executionId)
             throws JobInstanceAlreadyCompleteException,
                    NoSuchJobExecutionException,
                    NoSuchJobException,
                    JobRestartException,
                    JobParametersInvalidException

Description copied from interface: JobOperator

Restart a failed or stopped JobExecution. Fails with an exception if the id provided does not exist or corresponds to a JobInstance that in normal circumstances already completed successfully.

Specified by:

restart in interface JobOperator

Parameters:

executionId - the id of a failed or stopped JobExecution

Returns:

the id of the JobExecution that was started

Throws:

JobInstanceAlreadyCompleteException - if the job was already successfully completed

NoSuchJobExecutionException - if the id was not associated with any JobExecution

NoSuchJobException - if the JobExecution was found, but its corresponding Job is no longer available for launching

JobRestartException - if there is a non-specific error with the restart (e.g. corrupt or inconsistent restart data)

JobParametersInvalidException - if the parameters are not valid for this job

start

public Long start(String jobName,
         String parameters)
           throws NoSuchJobException,
                  JobInstanceAlreadyExistsException,
                  JobParametersInvalidException

Description copied from interface: JobOperator

Start a new instance of a job with the parameters specified.

Specified by:

start in interface JobOperator

Parameters:

jobName - the name of the Job to launch

parameters - the parameters to launch it with (comma or newline separated name=value pairs)

Returns:

the id of the JobExecution that is launched

Throws:

NoSuchJobException - if there is no Job with the specified name

JobInstanceAlreadyExistsException - if a job instance with this name and parameters already exists

JobParametersInvalidException

startNextInstance

public Long startNextInstance(String jobName)
                       throws NoSuchJobException,
                              JobParametersNotFoundException,
                              UnexpectedJobExecutionException,
                              JobParametersInvalidException

Description copied from interface: JobOperator

Launch the next in a sequence of JobInstance determined by the JobParametersIncrementer attached to the specified job. If the previous instance is still in a failed state, this method should still create a new instance and run it with different parameters (as long as the JobParametersIncrementer is working).

The last three exception described below should be extremely unlikely, but cannot be ruled out entirely. It points to some other thread or process trying to use this method (or a similar one) at the same time.

Specified by:

startNextInstance in interface JobOperator

Parameters:

jobName - the name of the job to launch

Returns:

the JobExecution id of the execution created when the job is launched

Throws:

NoSuchJobException - if there is no such job definition available

JobParametersNotFoundException - if the parameters cannot be found

UnexpectedJobExecutionException

JobParametersInvalidException

stop

@Transactional
public boolean stop(long executionId)
             throws NoSuchJobExecutionException,
                    JobExecutionNotRunningException

Description copied from interface: JobOperator

Send a stop signal to the JobExecution with the supplied id. The signal is successfully sent if this method returns true, but that doesn't mean that the job has stopped. The only way to be sure of that is to poll the job execution status.

Specified by:

stop in interface JobOperator

Parameters:

executionId - the id of a running JobExecution

Returns:

true if the message was successfully sent (does not guarantee that the job has stopped)

Throws:

NoSuchJobExecutionException - if there is no JobExecution with the id supplied

JobExecutionNotRunningException - if the JobExecution is not running (so cannot be stopped)

abandon

public JobExecution abandon(long jobExecutionId)
                     throws NoSuchJobExecutionException,
                            JobExecutionAlreadyRunningException

Description copied from interface: JobOperator

Mark the JobExecution as ABANDONED. If a stop signal is ignored because the process died this is the best way to mark a job as finished with (as opposed to STOPPED). An abandoned job execution can be restarted, but a stopping one cannot.

Specified by:

abandon in interface JobOperator

Parameters:

jobExecutionId - the job execution id to abort

Returns:

the JobExecution that was aborted

Throws:

NoSuchJobExecutionException

JobExecutionAlreadyRunningException - if the job is running (it should be stopped first)