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javax.ejb Interface EJBObject
- All Superinterfaces:
- Remote
- All Known Subinterfaces:
- Management
public interface EJBObject
- extends Remote
EJBObject 接口通过所有企业 Bean 的远程接口扩展。企业 Bean 的远程接口提供 EJB 对象的远程客户端视图。企业 Bean 的远程接口定义了远程客户端可调用的业务方法。
远程接口必须扩展 javax.ejb.EJBObject 接口,并且定义企业 Bean 特有的业务方法。
企业 Bean 的远程接口由企业 Bean 提供者定义,由企业 Bean 容器实现。
The EJBObject interface is extended by all enterprise Beans' remote interfaces. An enterprise Bean's remote interface provides the remote client view of an EJB object. An enterprise Bean's remote interface defines the business methods callable by a remote client.
The remote interface must extend the javax.ejb.EJBObject interface, and define the enterprise Bean specific business methods.
The enterprise Bean's remote interface is defined by the enterprise Bean provider and implemented by the enterprise Bean container.
Method Summary | |
---|---|
EJBHome |
getEJBHome()
Obtain the enterprise Bean's remote home interface. |
Handle |
getHandle()
Obtain a handle for the EJB object. |
Object |
getPrimaryKey()
Obtain the primary key of the EJB object. |
boolean |
isIdentical(EJBObject obj)
Test if a given EJB object is identical to the invoked EJB object. |
void |
remove()
Remove the EJB object. |
Method Detail |
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public EJBHome
getEJBHome() throws java.rmi.RemoteException
获得企业 Bean 的远程 home 接口。远程 home 接口定义企业 Bean 的 create、finder、remove 和 home 业务方法。
return | 对企业 Bean 的 home 接口的引用。 |
Throws | java.rmi.RemoteException: 方法由于系统级失败而失败时抛出该异常。 |
getEJBHome
EJBHome getEJBHome() throws RemoteException
- Obtain the enterprise Bean's remote home interface. The remote home
interface defines the enterprise Bean's create, finder, remove,
and home business methods.
- Returns:
- A reference to the enterprise Bean's home interface.
- Throws:
RemoteException
- Thrown when the method failed due to a system-level failure.
public Object
getPrimaryKey() throws java.rmi.RemoteException
获得 EJB 对象的主键。
可以对实体 Bean 调用此方法。试图对会话 Bean 调用此方法将导致 RemoteException。
return | EJB 对象的主键。 |
Throws | java.rmi.RemoteException: 方法由于系统级失败而失败或对会话 Bean 调用此方法时抛出该异常。 |
getPrimaryKey
Object getPrimaryKey() throws RemoteException
- Obtain the primary key of the EJB object.
This method can be called on an entity bean. An attempt to invoke this method on a session bean will result in RemoteException.
- Returns:
- The EJB object's primary key.
- Throws:
RemoteException
- Thrown when the method failed due to a system-level failure or when invoked on a session bean.
public void
remove() throws java.rmi.RemoteException, RemoveException
移除 EJB 对象。
Throws | java.rmi.RemoteException: 方法由于系统级失败而失败时抛出该异常。 |
Throws | RemoveException: 如果企业 Bean 或容器不允许销毁该对象。 |
remove
void remove() throws RemoteException, RemoveException
- Remove the EJB object.
- Throws:
RemoteException
- Thrown when the method failed due to a system-level failure.RemoveException
- The enterprise Bean or the container does not allow destruction of the object.
public Handle
getHandle() throws java.rmi.RemoteException
获得 EJB 对象的句柄。句柄可以随后用于重新获得对 EJB 对象的引用,可能是在不同的 Java 虚拟机中。
return | EJB 对象的句柄。 |
Throws | java.rmi.RemoteException: 方法由于系统级失败而失败时抛出该异常。 |
getHandle
Handle getHandle() throws RemoteException
- Obtain a handle for the EJB object. The handle can be used at later
time to re-obtain a reference to the EJB object, possibly in a
different Java Virtual Machine.
- Returns:
- A handle for the EJB object.
- Throws:
RemoteException
- Thrown when the method failed due to a system-level failure.
public boolean
isIdentical(EJBObject obj) throws java.rmi.RemoteException
测试给定 EJB 对象与调用的 EJB 对象是否相同。
obj | 要与调用对象进行相等性测试的对象。 |
return | 如果给定 EJB 对象与调用对象相同,则返回 true;否则返回 false。 |
Throws | java.rmi.RemoteException: 方法由于系统级失败而失败时抛出该异常。 |
isIdentical
boolean isIdentical(EJBObject obj) throws RemoteException
- Test if a given EJB object is identical to the invoked EJB object.
- Parameters:
obj
- An object to test for identity with the invoked object.- Returns:
- True if the given EJB object is identical to the invoked object, false otherwise.
- Throws:
RemoteException
- Thrown when the method failed due to a system-level failure.
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