/*
* Copyright 2006-2007 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.batch.core.repository.support;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.springframework.batch.core.BatchStatus;
import org.springframework.batch.core.JobExecution;
import org.springframework.batch.core.JobInstance;
import org.springframework.batch.core.JobParameters;
import org.springframework.batch.core.StepExecution;
import org.springframework.batch.core.repository.JobExecutionAlreadyRunningException;
import org.springframework.batch.core.repository.JobInstanceAlreadyCompleteException;
import org.springframework.batch.core.repository.JobRepository;
import org.springframework.batch.core.repository.JobRestartException;
import org.springframework.batch.core.repository.dao.ExecutionContextDao;
import org.springframework.batch.core.repository.dao.JobExecutionDao;
import org.springframework.batch.core.repository.dao.JobInstanceDao;
import org.springframework.batch.core.repository.dao.StepExecutionDao;
import org.springframework.batch.item.ExecutionContext;
import org.springframework.util.Assert;
/**
*
* <p>
* Implementation of {@link JobRepository} that stores JobInstances,
* JobExecutions, and StepExecutions using the injected DAOs.
* <p>
*
* @author Lucas Ward
* @author Dave Syer
* @author Robert Kasanicky
*
* @see JobRepository
* @see JobInstanceDao
* @see JobExecutionDao
* @see StepExecutionDao
*
*/
public class SimpleJobRepository implements JobRepository {
private JobInstanceDao jobInstanceDao;
private JobExecutionDao jobExecutionDao;
private StepExecutionDao stepExecutionDao;
private ExecutionContextDao ecDao;
/**
* Provide default constructor with low visibility in case user wants to use
* use aop:proxy-target-class="true" for AOP interceptor.
*/
SimpleJobRepository() {
}
public SimpleJobRepository(JobInstanceDao jobInstanceDao, JobExecutionDao jobExecutionDao,
StepExecutionDao stepExecutionDao, ExecutionContextDao ecDao) {
super();
this.jobInstanceDao = jobInstanceDao;
this.jobExecutionDao = jobExecutionDao;
this.stepExecutionDao = stepExecutionDao;
this.ecDao = ecDao;
}
public boolean isJobInstanceExists(String jobName, JobParameters jobParameters) {
return jobInstanceDao.getJobInstance(jobName, jobParameters) != null;
}
public JobExecution createJobExecution(String jobName, JobParameters jobParameters)
throws JobExecutionAlreadyRunningException, JobRestartException, JobInstanceAlreadyCompleteException {
Assert.notNull(jobName, "Job name must not be null.");
Assert.notNull(jobParameters, "JobParameters must not be null.");
/*
* Find all jobs matching the runtime information.
*
* If this method is transactional, and the isolation level is
* REPEATABLE_READ or better, another launcher trying to start the same
* job in another thread or process will block until this transaction
* has finished.
*/
JobInstance jobInstance = jobInstanceDao.getJobInstance(jobName, jobParameters);
ExecutionContext executionContext;
// existing job instance found
if (jobInstance != null) {
List<JobExecution> executions = jobExecutionDao.findJobExecutions(jobInstance);
// check for running executions and find the last started
for (JobExecution execution : executions) {
if (execution.isRunning()) {
throw new JobExecutionAlreadyRunningException("A job execution for this job is already running: "
+ jobInstance);
}
BatchStatus status = execution.getStatus();
if (status == BatchStatus.COMPLETED || status == BatchStatus.ABANDONED) {
throw new JobInstanceAlreadyCompleteException(
"A job instance already exists and is complete for parameters=" + jobParameters
+ ". If you want to run this job again, change the parameters.");
}
}
executionContext = ecDao.getExecutionContext(jobExecutionDao.getLastJobExecution(jobInstance));
}
else {
// no job found, create one
jobInstance = jobInstanceDao.createJobInstance(jobName, jobParameters);
executionContext = new ExecutionContext();
}
JobExecution jobExecution = new JobExecution(jobInstance);
jobExecution.setExecutionContext(executionContext);
jobExecution.setLastUpdated(new Date(System.currentTimeMillis()));
// Save the JobExecution so that it picks up an ID (useful for clients
// monitoring asynchronous executions):
jobExecutionDao.saveJobExecution(jobExecution);
ecDao.saveExecutionContext(jobExecution);
return jobExecution;
}
public void update(JobExecution jobExecution) {
Assert.notNull(jobExecution, "JobExecution cannot be null.");
Assert.notNull(jobExecution.getJobId(), "JobExecution must have a Job ID set.");
Assert.notNull(jobExecution.getId(), "JobExecution must be already saved (have an id assigned).");
jobExecution.setLastUpdated(new Date(System.currentTimeMillis()));
jobExecutionDao.updateJobExecution(jobExecution);
}
public void add(StepExecution stepExecution) {
validateStepExecution(stepExecution);
stepExecution.setLastUpdated(new Date(System.currentTimeMillis()));
stepExecutionDao.saveStepExecution(stepExecution);
ecDao.saveExecutionContext(stepExecution);
}
public void update(StepExecution stepExecution) {
validateStepExecution(stepExecution);
Assert.notNull(stepExecution.getId(), "StepExecution must already be saved (have an id assigned)");
stepExecution.setLastUpdated(new Date(System.currentTimeMillis()));
stepExecutionDao.updateStepExecution(stepExecution);
checkForInterruption(stepExecution);
}
private void validateStepExecution(StepExecution stepExecution) {
Assert.notNull(stepExecution, "StepExecution cannot be null.");
Assert.notNull(stepExecution.getStepName(), "StepExecution's step name cannot be null.");
Assert.notNull(stepExecution.getJobExecutionId(), "StepExecution must belong to persisted JobExecution");
}
public void updateExecutionContext(StepExecution stepExecution) {
ecDao.updateExecutionContext(stepExecution);
}
public void updateExecutionContext(JobExecution jobExecution) {
ecDao.updateExecutionContext(jobExecution);
}
public StepExecution getLastStepExecution(JobInstance jobInstance, String stepName) {
List<JobExecution> jobExecutions = jobExecutionDao.findJobExecutions(jobInstance);
List<StepExecution> stepExecutions = new ArrayList<StepExecution>(jobExecutions.size());
for (JobExecution jobExecution : jobExecutions) {
stepExecutionDao.addStepExecutions(jobExecution);
for (StepExecution stepExecution : jobExecution.getStepExecutions()) {
if (stepName.equals(stepExecution.getStepName())) {
stepExecutions.add(stepExecution);
}
}
}
StepExecution latest = null;
for (StepExecution stepExecution : stepExecutions) {
if (latest == null) {
latest = stepExecution;
}
if (latest.getStartTime().getTime() < stepExecution.getStartTime().getTime()) {
latest = stepExecution;
}
}
if (latest != null) {
ExecutionContext executionContext = ecDao.getExecutionContext(latest);
latest.setExecutionContext(executionContext);
}
return latest;
}
/**
* @return number of executions of the step within given job instance
*/
public int getStepExecutionCount(JobInstance jobInstance, String stepName) {
int count = 0;
List<JobExecution> jobExecutions = jobExecutionDao.findJobExecutions(jobInstance);
for (JobExecution jobExecution : jobExecutions) {
stepExecutionDao.addStepExecutions(jobExecution);
for (StepExecution stepExecution : jobExecution.getStepExecutions()) {
if (stepName.equals(stepExecution.getStepName())) {
count++;
}
}
}
return count;
}
/*
* Check to determine whether or not the JobExecution that is the parent of
* the provided StepExecution has been interrupted. If, after synchronizing
* the status with the database, the status has been updated to STOPPING,
* then the job has been interrupted.
*
* @param stepExecution
*/
private void checkForInterruption(StepExecution stepExecution) {
JobExecution jobExecution = stepExecution.getJobExecution();
jobExecutionDao.synchronizeStatus(jobExecution);
if (jobExecution.isStopping()) {
stepExecution.setTerminateOnly();
}
}
public JobExecution getLastJobExecution(String jobName, JobParameters jobParameters) {
JobInstance jobInstance = jobInstanceDao.getJobInstance(jobName, jobParameters);
if (jobInstance == null) {
return null;
}
JobExecution jobExecution = jobExecutionDao.getLastJobExecution(jobInstance);
if (jobExecution != null) {
jobExecution.setExecutionContext(ecDao.getExecutionContext(jobExecution));
}
return jobExecution;
}
}
|