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HandleDelegate.javaAPI DocGlassfish v2 API6004Fri May 04 22:35:56 BST 2007javax.ejb.spi

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".

Fields Summary
Constructors Summary
Methods Summary
public javax.ejb.EJBHomereadEJBHome(java.io.ObjectInputStream istream)
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.

param
istream The input stream.
return
The deserialized EJBHome reference.
exception
IOException The EJBHome could not be deserialized because of a system-level failure.
exception
ClassNotFoundException The EJBHome could not be deserialized because some class could not be found.

public javax.ejb.EJBObjectreadEJBObject(java.io.ObjectInputStream istream)
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.

param
istream The input stream.
return
The deserialized EJBObject reference.
exception
IOException The EJBObject could not be deserialized because of a system-level failure.
exception
ClassNotFoundException The EJBObject could not be deserialized because some class could not be found.

public voidwriteEJBHome(javax.ejb.EJBHome ejbHome, java.io.ObjectOutputStream ostream)
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.

param
ejbHome The EJBHome reference to be serialized.
param
ostream The output stream.
exception
IOException The EJBObject could not be serialized because of a system-level failure.

public voidwriteEJBObject(javax.ejb.EJBObject ejbObject, java.io.ObjectOutputStream ostream)
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.

param
ejbObject The EJBObject reference to be serialized.
param
ostream The output stream.
exception
IOException The EJBObject could not be serialized because of a system-level failure.