EntityTransaction (Java EE 5)

Java EE API

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javax.persistence Interface EntityTransaction

public interface EntityTransaction


EntityTransaction 接口，用于控制本地资源实体管理器的资源事务。getTransaction EntityManager.getTransaction() 方法返回 EntityTransaction 接口。
since
en
Java Persistence 1.0
英文文档：

The EntityTransaction interface is used to control resource transactions on resource-local entity managers. The EntityManager.getTransaction() method returns the EntityTransaction interface.

Since:
Java Persistence 1.0

Method Summary
 void begin()
          Start the resource transaction.
 void commit()
          Commit the current transaction, writing any unflushed changes to the database.
 boolean getRollbackOnly()
          Determine whether the current transaction has been marked for rollback.
 boolean isActive()
          Indicate whether a transaction is in progress.
 void rollback()
          Roll back the current transaction
 void setRollbackOnly()
          Mark the current transaction so that the only possible outcome of the transaction is for the transaction to be rolled back.
 

Method Detail

public void begin()
开始资源事务。
ThrowsIllegalStateException: 如果 #isActive() 为 true。
英文文档：

begin

void begin()
Start the resource transaction.

Throws:
IllegalStateException - if isActive() is true.

public void commit()
提交当前事务，将未刷新的更改写入数据库。
ThrowsIllegalStateException: 如果 #isActive() 为 false。
ThrowsRollbackException: 如果提交失败。
英文文档：

commit

void commit()
Commit the current transaction, writing any unflushed changes to the database.

Throws:
IllegalStateException - if isActive() is false.
RollbackException - if the commit fails.

public void rollback()
回滚当前事务
ThrowsIllegalStateException: 如果 #isActive() 为 false。
ThrowsPersistenceException: 如果遇到不可预料的错误情况。
英文文档：

rollback

void rollback()
Roll back the current transaction

Throws:
IllegalStateException - if isActive() is false.
PersistenceException - if an unexpected error condition is encountered.

public void setRollbackOnly()
标记当前的事务，使该事务最终只能被回滚。
ThrowsIllegalStateException: 如果 #isActive() 为 false。
英文文档：

setRollbackOnly

void setRollbackOnly()
Mark the current transaction so that the only possible outcome of the transaction is for the transaction to be rolled back.

Throws:
IllegalStateException - if isActive() is false.

public boolean getRollbackOnly()
确定当前事务是否标记为回滚。
ThrowsIllegalStateException: 如果 #isActive() 为 false。
英文文档：

getRollbackOnly

boolean getRollbackOnly()
Determine whether the current transaction has been marked for rollback.

Throws:
IllegalStateException - if isActive() is false.

public boolean isActive()
指示事务是否正在进行。
ThrowsPersistenceException: 如果遇到不可预料的错误情况。
英文文档：

isActive

boolean isActive()
Indicate whether a transaction is in progress.

Throws:
PersistenceException - if an unexpected error condition is encountered.
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