LDAP 与 MySql 连用 的JPA事物问题

本事甚是喜欢JPA简单方便明了，所以在LDAP项目要加上MYSQL数据库，但LDAP没有与jpa连用的事物处理 是一个很头疼的事，找到源码 发现里面只有2种对组合事物的支持：

ContextSourceAndDataSourceTransactionManager LDAP与JDBC的组合支持
ContextSourceAndHibernateTransactionManager LDAP与Hibernate的组合支持
如果使用这个 就是要说自己还要去封装jdbc 非常不爽，所以找到了个老外给的解决方法，自己写一个方法，来完成LDAP与JPA的组事物，下面就是 那段代码

import org.springframework.ldap.core.ContextSource;
import org.springframework.ldap.transaction.compensating.TempEntryRenamingStrategy;
import org.springframework.ldap.transaction.compensating.manager.ContextSourceTransactionManagerDelegate;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionException;
import org.springframework.transaction.TransactionSuspensionNotSupportedException;
import org.springframework.transaction.support.DefaultTransactionStatus;
public class ContextSourceAndJpaTransactionManager extends JpaTransactionManager {
private static final long serialVersionUID = 1L;
private ContextSourceTransactionManagerDelegate ldapManagerDelegate =
new ContextSourceTransactionManagerDelegate();
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#isExistingTransaction(Object)
*/
protected boolean isExistingTransaction(Object transaction)
{
ContextSourceAndJpaTransactionObject actualTransactionObject =
(ContextSourceAndJpaTransactionObject) transaction;
return super.isExistingTransaction(actualTransactionObject
.getJpaTransactionObject());
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doGetTransaction()
*/
protected Object doGetTransaction() throws TransactionException
{
Object dataSourceTransactionObject = super.doGetTransaction();
Object contextSourceTransactionObject =
ldapManagerDelegate.doGetTransaction();
return new ContextSourceAndJpaTransactionObject(
contextSourceTransactionObject, dataSourceTransactionObject
);
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doBegin(java.lang.Object,
*      org.springframework.transaction.TransactionDefinition)
*/
protected void doBegin(Object transaction, TransactionDefinition definition)
throws TransactionException
{
ContextSourceAndJpaTransactionObject actualTransactionObject =
(ContextSourceAndJpaTransactionObject) transaction;
super.doBegin(actualTransactionObject.getJpaTransactionObject(),
definition);
ldapManagerDelegate.doBegin(
actualTransactionObject.getLdapTransactionObject(),
definition
);
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doCleanupAfterCompletion(java.lang.Object)
*/
protected void doCleanupAfterCompletion(Object transaction)
{
ContextSourceAndJpaTransactionObject actualTransactionObject =
(ContextSourceAndJpaTransactionObject) transaction;
super.doCleanupAfterCompletion(actualTransactionObject
.getJpaTransactionObject());
ldapManagerDelegate.doCleanupAfterCompletion(actualTransactionObject
.getLdapTransactionObject());
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doCommit(org.springframework.transaction.support.DefaultTransactionStatus)
*/
protected void doCommit(DefaultTransactionStatus status)
throws TransactionException
{
ContextSourceAndJpaTransactionObject actualTransactionObject =
(ContextSourceAndJpaTransactionObject) status.getTransaction();
try
{
super.doCommit(new DefaultTransactionStatus(
actualTransactionObject.getJpaTransactionObject(),
status.isNewTransaction(),
status.isNewSynchronization(),
status.isReadOnly(),
status.isDebug(),
status.getSuspendedResources())
);
}
catch (TransactionException ex)
{
if (isRollbackOnCommitFailure())
{
logger.debug("Failed to commit db resource, rethrowing", ex);
// If we are to rollback on commit failure, just rethrow the
// exception - this will cause a rollback to be performed on
// both resources.
throw ex;
}
else
{
logger.warn(
"Failed to commit and resource is rollbackOnCommit not set -"
+ " proceeding to commit ldap resource.");
}
}
ldapManagerDelegate.doCommit(new DefaultTransactionStatus(
actualTransactionObject.getLdapTransactionObject(),
status.isNewTransaction(),
status.isNewSynchronization(),
status.isReadOnly(),
status.isDebug(),
status.getSuspendedResources())
);
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doRollback(org.springframework.transaction.support.DefaultTransactionStatus)
*/
protected void doRollback(DefaultTransactionStatus status) throws TransactionException
{
ContextSourceAndJpaTransactionObject actualTransactionObject =
(ContextSourceAndJpaTransactionObject) status.getTransaction();
super.doRollback(new DefaultTransactionStatus(
actualTransactionObject.getJpaTransactionObject(),
status.isNewTransaction(),
status.isNewSynchronization(),
status.isReadOnly(),
status.isDebug(),
status.getSuspendedResources())
);
ldapManagerDelegate.doRollback(new DefaultTransactionStatus(
actualTransactionObject.getLdapTransactionObject(),
status.isNewTransaction(),
status.isNewSynchronization(),
status.isReadOnly(),
status.isDebug(),
status.getSuspendedResources())
);
}
public ContextSource getContextSource()
{
return ldapManagerDelegate.getContextSource();
}
public void setContextSource(ContextSource contextSource)
{
ldapManagerDelegate.setContextSource(contextSource);
}
protected void setRenamingStrategy(TempEntryRenamingStrategy renamingStrategy)
{
ldapManagerDelegate.setRenamingStrategy(renamingStrategy);
}
private final static class ContextSourceAndJpaTransactionObject
{
private Object ldapTransactionObject;
private Object jpaTransactionObject;
public ContextSourceAndJpaTransactionObject(
Object ldapTransactionObject, Object jpaTransactionObject)
{
this.ldapTransactionObject = ldapTransactionObject;
this.jpaTransactionObject = jpaTransactionObject;
}
public Object getJpaTransactionObject()
{
return jpaTransactionObject;
}
public Object getLdapTransactionObject()
{
return ldapTransactionObject;
}
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doSuspend(java.lang.Object)
*/
protected Object doSuspend(Object transaction) throws TransactionException
{
throw new TransactionSuspensionNotSupportedException(
"Transaction manager [" + getClass().getName()
+ "] does not support transaction suspension");
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doResume(java.lang.Object, java.lang.Object)
*/
protected void doResume(Object transaction, Object suspendedResources)
throws TransactionException
{
throw new TransactionSuspensionNotSupportedException(
"Transaction manager [" + getClass().getName()
+ "] does not support transaction suspension");
}
/**
* @see org.springframework.orm.jpa.JpaTransactionManager#doSetRollbackOnly(org.springframework.transaction.support.DefaultTransactionStatus)
*/
@Override
protected void doSetRollbackOnly(DefaultTransactionStatus status)
{
super.doSetRollbackOnly(
new DefaultTransactionStatus(
((ContextSourceAndJpaTransactionObject)status.getTransaction())
.getJpaTransactionObject(),
status.isNewTransaction(),
status.isNewSynchronization(),
status.isReadOnly(),
status.isDebug(),
status.getSuspendedResources())
);
}
}

这事那人写的 一直没时间翻译 等有时间 得好好研究下 并写好注解。。。之后你的tx.xml要支持它 所以再看下我的tx.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:cache="http://www.springframework.org/schema/cache"
xmlns:jpa="http://www.springframework.org/schema/data/jpa"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache-3.1.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd" default-lazy-init="true"  default-autowire="byName">

<bean id="transactionManager" class="com.smarcloud.control.util.ContextSourceAndJpaTransactionManager">
<!-- 第一个是LDAP的 -->
<property name="contextSource" ref="contextSource"/>
<!-- 第二个是Spring-Date-Jpa的 -->
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>

<tx:annotation-driven transaction-manager="transactionManager"  />

</beans>

这样就可以了 ，非常好用的 ，对了 对于删除ldap的一个组织时，下面如果有分组，请不要家事物，否者你会发现 你并没删除掉并且还报错。
本文出自 “记下就对了” 博客，请务必保留此出处http://jueshizhanhun.blog.51cto.com/4372226/1259803