HandleDelegate (Java EE 5 SDK)

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Java EE 5 SDK

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摘要: 嵌套 | 字段 | 构造器 | 方法

详细信息: 字段 | 构造器 | 方法

javax.ejb.spi Interface HandleDelegate

public interface HandleDelegate

The HandleDelegate interface is implemented by the EJB container. It is used by portable implementations of javax.ejb.Handle and javax.ejb.HomeHandle. It is not used by EJB components or by client components. It provides methods to serialize and deserialize EJBObject and EJBHome references to streams.

The HandleDelegate object is obtained by JNDI lookup at the reserved name "java:comp/HandleDelegate".

方法摘要
`EJBHome`	`readEJBHome(ObjectInputStream istream)` Deserialize the EJBHome reference corresponding to a HomeHandle.
`EJBObject`	`readEJBObject(ObjectInputStream istream)` Deserialize the EJBObject reference corresponding to a Handle.
`void`	`writeEJBHome(EJBHome ejbHome, ObjectOutputStream ostream)` Serialize the EJBHome reference corresponding to a HomeHandle.
`void`	`writeEJBObject(EJBObject ejbObject, ObjectOutputStream ostream)` Serialize the EJBObject reference corresponding to a Handle.

方法详细信息

writeEJBObject

void writeEJBObject(EJBObject ejbObject,
                    ObjectOutputStream ostream)
                    throws IOException

Serialize the EJBObject reference corresponding to a Handle.

This method is called from the writeObject method of portable Handle implementation classes. The ostream object is the same object that was passed in to the Handle class's writeObject.

参数:: ejbObject - The EJBObject reference to be serialized.; ostream - The output stream.
抛出异常:: IOException - The EJBObject could not be serialized because of a system-level failure.

readEJBObject

EJBObject readEJBObject(ObjectInputStream istream)
                        throws IOException,
                               ClassNotFoundException

Deserialize the EJBObject reference corresponding to a Handle.

readEJBObject is called from the readObject method of portable Handle implementation classes. The istream object is the same object that was passed in to the Handle class's readObject. When readEJBObject is called, istream must point to the location in the stream at which the EJBObject reference can be read. The container must ensure that the EJBObject reference is capable of performing invocations immediately after deserialization.

参数:: istream - The input stream.
返回:: The deserialized EJBObject reference.
抛出异常:: IOException - The EJBObject could not be deserialized because of a system-level failure.; ClassNotFoundException - The EJBObject could not be deserialized because some class could not be found.

writeEJBHome

void writeEJBHome(EJBHome ejbHome,
                  ObjectOutputStream ostream)
                  throws IOException

Serialize the EJBHome reference corresponding to a HomeHandle.

This method is called from the writeObject method of portable HomeHandle implementation classes. The ostream object is the same object that was passed in to the Handle class's writeObject.

参数:: ejbHome - The EJBHome reference to be serialized.; ostream - The output stream.
抛出异常:: IOException - The EJBObject could not be serialized because of a system-level failure.

readEJBHome

EJBHome readEJBHome(ObjectInputStream istream)
                    throws IOException,
                           ClassNotFoundException

Deserialize the EJBHome reference corresponding to a HomeHandle.

readEJBHome is called from the readObject method of portable HomeHandle implementation classes. The istream object is the same object that was passed in to the HomeHandle class's readObject. When readEJBHome is called, istream must point to the location in the stream at which the EJBHome reference can be read. The container must ensure that the EJBHome reference is capable of performing invocations immediately after deserialization.

参数:: istream - The input stream.
返回:: The deserialized EJBHome reference.
抛出异常:: IOException - The EJBHome could not be deserialized because of a system-level failure.; ClassNotFoundException - The EJBHome could not be deserialized because some class could not be found.

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