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Java example source code file (Message.java)

This example Java source code file (Message.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

cdr_enc_version, fragmentmessage, giopbigendian, giopcloseconnection, giopfragment, gioplittlemagic, giopmessageheaderlength, giopversion, ioexception, little_endian_bit, message, more_fragments_bit, nio, thread_pool_to_use_mask, trailing_two_bit_byte_mask

The Message.java Java example source code

/*
 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.corba.se.impl.protocol.giopmsgheaders;

import java.io.IOException;
import java.nio.ByteBuffer;
import com.sun.corba.se.spi.ior.iiop.GIOPVersion;

/**
 * This is the base interface for different message type interfaces.
 *
 * @author Ram Jeyaraman 05/14/2000
 */

public interface Message {

    // Generic constants

    int defaultBufferSize = 1024;
    int GIOPBigEndian = 0;
    int GIOPLittleEndian = 1;
    int GIOPBigMagic =    0x47494F50;
    int GIOPLittleMagic = 0x504F4947;
    int GIOPMessageHeaderLength = 12;

    // Other useful constants

    byte LITTLE_ENDIAN_BIT = 0x01;
    byte MORE_FRAGMENTS_BIT = 0x02;
    byte FLAG_NO_FRAG_BIG_ENDIAN = 0x00;
    static final byte TRAILING_TWO_BIT_BYTE_MASK = 0x3;
    static final byte THREAD_POOL_TO_USE_MASK = 0x3F;

    // Encoding related constants

    byte CDR_ENC_VERSION = 0x00;
    byte JAVA_ENC_VERSION = 0x01;

    // Message types

    byte GIOPRequest = 0;
    byte GIOPReply = 1;
    byte GIOPCancelRequest = 2;
    byte GIOPLocateRequest = 3;
    byte GIOPLocateReply = 4;
    byte GIOPCloseConnection = 5;
    byte GIOPMessageError = 6;
    byte GIOPFragment = 7; // 1.1 & 1.2:

    // Accessor methods

    GIOPVersion getGIOPVersion();
    byte getEncodingVersion();
    boolean isLittleEndian();
    boolean moreFragmentsToFollow();
    int getType();
    int getSize();
    ByteBuffer getByteBuffer();
    int getThreadPoolToUse();

    // Mutator methods

    void read(org.omg.CORBA.portable.InputStream istream);
    void write(org.omg.CORBA.portable.OutputStream ostream);

    void setSize(ByteBuffer byteBuffer, int size);

    FragmentMessage createFragmentMessage();

    void callback(MessageHandler handler) throws IOException;

    void setByteBuffer(ByteBuffer byteBuffer);
    void setEncodingVersion(byte version);
}

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