/*
* Copyright 2006-2014 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 org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DefaultPointcutAdvisor;
import org.springframework.aop.support.NameMatchMethodPointcut;
import org.springframework.batch.core.repository.JobRepository;
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.support.PropertiesConverter;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.interceptor.TransactionInterceptor;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.springframework.util.Assert;
/**
* A {@link FactoryBean} that automates the creation of a
* {@link SimpleJobRepository}. Declares abstract methods for providing DAO
* object implementations.
*
* @see JobRepositoryFactoryBean
* @see MapJobRepositoryFactoryBean
*
* @author Ben Hale
* @author Lucas Ward
* @author Robert Kasanicky
*/
public abstract class AbstractJobRepositoryFactoryBean implements FactoryBean<JobRepository>, InitializingBean {
private PlatformTransactionManager transactionManager;
private ProxyFactory proxyFactory;
private String isolationLevelForCreate = DEFAULT_ISOLATION_LEVEL;
private boolean validateTransactionState = true;
/**
* Default value for isolation level in create* method.
*/
private static final String DEFAULT_ISOLATION_LEVEL = "ISOLATION_SERIALIZABLE";
/**
* @return fully configured {@link JobInstanceDao} implementation.
*/
protected abstract JobInstanceDao createJobInstanceDao() throws Exception;
/**
* @return fully configured {@link JobExecutionDao} implementation.
*/
protected abstract JobExecutionDao createJobExecutionDao() throws Exception;
/**
* @return fully configured {@link StepExecutionDao} implementation.
*/
protected abstract StepExecutionDao createStepExecutionDao() throws Exception;
/**
* @return fully configured {@link ExecutionContextDao} implementation.
*/
protected abstract ExecutionContextDao createExecutionContextDao() throws Exception;
/**
* The type of object to be returned from {@link #getObject()}.
*
* @return JobRepository.class
* @see org.springframework.beans.factory.FactoryBean#getObjectType()
*/
@Override
public Class<JobRepository> getObjectType() {
return JobRepository.class;
}
@Override
public boolean isSingleton() {
return true;
}
/**
* Flag to determine whether to check for an existing transaction when a
* JobExecution is created. Defaults to true because it is usually a
* mistake, and leads to problems with restartability and also to deadlocks
* in multi-threaded steps.
*
* @param validateTransactionState the flag to set
*/
public void setValidateTransactionState(boolean validateTransactionState) {
this.validateTransactionState = validateTransactionState;
}
/**
* public setter for the isolation level to be used for the transaction when
* job execution entities are initially created. The default is
* ISOLATION_SERIALIZABLE, which prevents accidental concurrent execution of
* the same job (ISOLATION_REPEATABLE_READ would work as well).
*
* @param isolationLevelForCreate the isolation level name to set
*
* @see SimpleJobRepository#createJobExecution(String,
* org.springframework.batch.core.JobParameters)
*/
public void setIsolationLevelForCreate(String isolationLevelForCreate) {
this.isolationLevelForCreate = isolationLevelForCreate;
}
/**
* Public setter for the {@link PlatformTransactionManager}.
* @param transactionManager the transactionManager to set
*/
public void setTransactionManager(PlatformTransactionManager transactionManager) {
this.transactionManager = transactionManager;
}
/**
* The transaction manager used in this factory. Useful to inject into steps
* and jobs, to ensure that they are using the same instance.
*
* @return the transactionManager
*/
public PlatformTransactionManager getTransactionManager() {
return transactionManager;
}
/**
* Convenience method for clients to grab the {@link JobRepository} without
* a cast.
* @return the {@link JobRepository} from {@link #getObject()}
* @throws Exception if the repository could not be created
* @deprecated use {@link #getObject()} instead
*/
@Deprecated
public JobRepository getJobRepository() throws Exception {
return getObject();
}
private void initializeProxy() throws Exception {
if (proxyFactory == null) {
proxyFactory = new ProxyFactory();
TransactionInterceptor advice = new TransactionInterceptor(transactionManager,
PropertiesConverter.stringToProperties("create*=PROPAGATION_REQUIRES_NEW,"
+ isolationLevelForCreate + "\ngetLastJobExecution*=PROPAGATION_REQUIRES_NEW,"
+ isolationLevelForCreate + "\n*=PROPAGATION_REQUIRED"));
if (validateTransactionState) {
DefaultPointcutAdvisor advisor = new DefaultPointcutAdvisor(new MethodInterceptor() {
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
if (TransactionSynchronizationManager.isActualTransactionActive()) {
throw new IllegalStateException(
"Existing transaction detected in JobRepository. "
+ "Please fix this and try again (e.g. remove @Transactional annotations from client).");
}
return invocation.proceed();
}
});
NameMatchMethodPointcut pointcut = new NameMatchMethodPointcut();
pointcut.addMethodName("create*");
advisor.setPointcut(pointcut);
proxyFactory.addAdvisor(advisor);
}
proxyFactory.addAdvice(advice);
proxyFactory.setProxyTargetClass(false);
proxyFactory.addInterface(JobRepository.class);
proxyFactory.setTarget(getTarget());
}
}
@Override
public void afterPropertiesSet() throws Exception {
Assert.notNull(transactionManager, "TransactionManager must not be null.");
initializeProxy();
}
private Object getTarget() throws Exception {
return new SimpleJobRepository(createJobInstanceDao(), createJobExecutionDao(), createStepExecutionDao(),
createExecutionContextDao());
}
@Override
public JobRepository getObject() throws Exception {
if (proxyFactory == null) {
afterPropertiesSet();
}
return (JobRepository) proxyFactory.getProxy(getClass().getClassLoader());
}
}