javax.ejb.spi.HandleDelegate Maven / Gradle / Ivy
Show all versions of javax.ejb-api Show documentation
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://oss.oracle.com/licenses/CDDL+GPL-1.1
* or LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package javax.ejb.spi;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
import javax.ejb.EJBObject;
import javax.ejb.EJBHome;
/**
* 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".
*
* @since EJB 2.0
*/
public interface HandleDelegate {
/**
* 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
* method.
*
* @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.
*/
public void writeEJBObject(EJBObject ejbObject, ObjectOutputStream ostream)
throws IOException;
/**
* Deserialize the EJBObject reference corresponding to a Handle.
*
*
The readEJBObject method 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 method. WhenreadEJBObject 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 javax.ejb.EJBObject readEJBObject(ObjectInputStream istream)
throws IOException, ClassNotFoundException;
/**
* 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 method.
*
* @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 void writeEJBHome(EJBHome ejbHome, ObjectOutputStream ostream)
throws IOException;
/**
* Deserialize the EJBHome reference corresponding to a HomeHandle.
*
*
The readEJBHome method 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 method. 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.EJBHome readEJBHome(ObjectInputStream istream)
throws IOException, ClassNotFoundException;
}