persistentmessage.java

实现了Jms的服务器源码,支持多种适配器,DB,FTP,支持多种数据库

/**
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright
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 *    copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions and the
 *    following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. The name "Exolab" must not be used to endorse or promote
 *    products derived from this Software without prior written
 *    permission of Exoffice Technologies.  For written permission,
 *    please contact [e-mail].
 *
 * 4. Products derived from this Software may not be called "Exolab"
 *    nor may "Exolab" appear in their names without prior written
 *    permission of Exoffice Technologies. Exolab is a registered
 *    trademark of Exoffice Technologies.
 *
 * 5. Due credit should be given to the Exolab Project
 *    (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2000-2001,2003 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: PersistentMessage.java,v 1.9 2003/08/17 01:32:25 tanderson Exp $
 *
 * Date         Author  Changes
 */

package org.exolab.jms.persistence;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;

import javax.jms.JMSException;

import org.exolab.core.foundation.PersistentObject;
import org.exolab.jms.message.DestinationImpl;
import org.exolab.jms.message.MessageImpl;


/**
 * A wrapper to the Message Object to assist in persistency.
 *
 *
 * @version     $Revision: 1.9 $ $Date: 2003/08/17 01:32:25 $
 * @author      <a href="mailto:[e-mail]">Jim Mourikis</a>
 */
public class PersistentMessage extends PersistentObject {

    // Used for serialization
    static final long serialVersionUID = 2;

    // The message destination
    private String destination_;

    // The message id.
    private String messageId_;

    // The message type, i.e. BytesMessage, TextMessage, StreamMessage etc.
    private String messageType_;

    // The message priority.
    private int priority_;

    // The timestamp when the message was received.
    private long timeStamp_;

    // The message expiry time
    private long expiryTime_;

    // The message holder.
    private MessageImpl message_;

    // Indicates whether the message has been processed by the provider
    private boolean processed_;


    /**
     * Default constructor.
     *
     * @param MessageImpl	the message to persist
     *
     */
    public PersistentMessage() {
        super();
    }


    /**
     * Store the message to be persisted. And extract any required column
     * details.
     *
     * @param MessageImpl	the message to persist
     *
     */
    public PersistentMessage(MessageImpl message) throws JMSException {
        super();
        message_ = message;
        destination_ =
            ((DestinationImpl) message.getJMSDestination()).getDestination();
        messageId_ = message.getMessageId().getId();
        messageType_ = message.getJMSType();
        priority_ = message.getJMSPriority();
        expiryTime_ = message.getJMSExpiration();
        timeStamp_ = message.getAcceptedTime();
        processed_ = message.getProcessed();
    }

    /**
     * Set the message held by this persistent object
     *
     * @param message - the message held
     */
    public void setMessage(MessageImpl message) {
        message_ = message;
    }

    /**
     * return the held message from the persistent object.
     *
     * @return MessageImpl the held message.
     *
     */
    public MessageImpl getMessage() {
        return message_;
    }


    /**
     * Get the message as a serialized blob.
     *
     * @return String The serialized message.
     *
     */
    public byte[] getMessageBlob() {
        try {
            ByteArrayOutputStream bout = new ByteArrayOutputStream();
            ObjectOutputStream tmp = new ObjectOutputStream(bout);
            tmp.writeObject(message_);
            tmp.close();
            return bout.toByteArray();
        } catch (Exception err) {
            System.err.println
                ("Error PersistentMessage: Failed to serialize message\n"
                + err);
            return null;
        }
    }


    /**
     * Set the message from a serialized blob
     *
     * @param blob The serialized message.
     *
     */
    public void setMessageBlob(byte[] blob) {
        try {
            if (blob != null) {
                ByteArrayInputStream bin =
                    new ByteArrayInputStream(blob);
                ObjectInputStream tmpin = new ObjectInputStream(bin);
                message_ = (MessageImpl) tmpin.readObject();
                tmpin.close();
            } else {
                message_ = null;
            }
        } catch (Exception err) {
            System.err.println
                ("Error PersistentMessage: Failed to de-serialize message\n"
                + err);
            err.printStackTrace();
        }
    }

    /**
     * Get the message destination
     *
     * @return String The destination of the message
     *
     */
    public String getDestination() {
        return destination_;
    }

    /**
     * Set the message destination
     *
     * @param destination The destination of the message
     *
     */
    public void setDestination(String destination) {
        destination_ = destination;
    }

    /**
     * Get the message id
     *
     * @return the message id
     *
     */
    public String getMessageId() {
        return messageId_;
    }

    /**
     * Set the message id
     *
     * @param id The message id
     *
     */
    public void setMessageId(String id) {
        messageId_ = id;
    }

    /**
     * Get the message type
     *
     * @return String The message type
     *
     */
    public String getMessageType() {
        return messageType_;
    }

    /**
     * Set the message type
     *
     * @param messageType The message type
     *
     */
    public void setMessageType(String messageType) {
        messageType_ = messageType;
    }

    /**
     * Get the message priority
     *
     * @return int The priority
     *
     */
    public int getPriority() {
        return priority_;
    }

    /**
     * Set the message priority
     *
     * @param priority The message priority to set
     *
     */
    public void setPriority(int priority) {
        priority_ = priority;
    }

    /**
     * Get the time the message was received by the MessageMgr
     *
     * @return long The message creation time in secs since epoc
     *
     */
    public long getJMSTimeStamp() {
        return timeStamp_;
    }

    /**
     * Set the time the message was received by the MessageMgr
     *
     * @param timeStamp The message creation time in secs since epoc
     *
     */
    public void setJMSTimeStamp(long time) {
        timeStamp_ = time;
    }

    /**
     * Retrieve the message expiry time
     *
     * @return long - the time that the underlying message expires
     *
     */
    public long getExpiryTime() {
        return expiryTime_;
    }

    /**
     * Set the message expiry time.
     *
     * @param time - message expiry time in milliseconds
     *
     */
    public void setExpiryTime(long time) {
        expiryTime_ = time;
    }

    /**
     * Set the state of the processed flag
     *
     * @param value - true if message has been processed
     */
    public void setProcessed(boolean value) {
        processed_ = value;
    }

    /**
     * Return the state of the processed flag
     *
     * @return boolean - true if the message has been processed
     */
    public boolean getProcessed() {
        return processed_;
    }

    // implementation of Externalizable.writeExternal
    public void writeExternal(ObjectOutput stream) throws IOException {
        stream.writeLong(serialVersionUID);
        stream.writeObject(destination_);
        stream.writeUTF(messageId_);
        stream.writeObject(messageType_);
        stream.writeInt(priority_);
        stream.writeLong(timeStamp_);
        stream.writeLong(expiryTime_);
        stream.writeBoolean(processed_);
        stream.writeObject(message_);
        super.writeExternal(stream);
    }

    // implementation of Externalizable.writeExternal
    public void readExternal(ObjectInput stream)
        throws IOException, ClassNotFoundException {
        long version = stream.readLong();
        if (version == serialVersionUID) {
            destination_ = (String) stream.readObject();
            messageId_ = stream.readUTF();
            messageType_ = (String) stream.readObject();
            priority_ = stream.readInt();
            timeStamp_ = stream.readLong();
            expiryTime_ = stream.readLong();
            processed_ = stream.readBoolean();
            message_ = (MessageImpl) stream.readObject();
        } else {
            throw new IOException("PersistentMessage with version "
                + version + " is not supported.");
        }
        super.readExternal(stream);

    }
} //-- PersistentMessage