channelinvocation.java

OpenJMS是一个开源的Java Message Service API 1.0.2 规范的实现,它包含有以下特性： *. 它既支持点到点（point-to-point）（PTP）模型和发布/订

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 *    please contact [e-mail].
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 *
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 * Copyright 2003-2005 (C) Exoffice Technologies Inc. All Rights Reserved.
 *
 * $Id: ChannelInvocation.java,v 1.1 2005/06/04 14:34:45 tanderson Exp $
 */
package org.exolab.jms.net.multiplexer;

import java.io.IOException;

import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;

import org.exolab.jms.net.connector.Caller;
import org.exolab.jms.net.connector.Invocation;
import org.exolab.jms.net.connector.Request;
import org.exolab.jms.net.connector.Response;
import org.exolab.jms.net.connector.InvocationHandler;


/**
 * <code>ChannelInvocation</code> is used by
 * {@link MultiplexedManagedConnection} to pass remote method invocations
 * on a {@link Channel} to an {@link InvocationHandler}.
 *
 * @author <a href="mailto:[e-mail]">Tim Anderson</a>
 * @version $Revision: 1.1 $ $Date: 2005/06/04 14:34:45 $
 */
class ChannelInvocation implements Invocation {

    /**
     * The channel to use.
     */
    private final Channel _channel;

    /**
     * The caller peforming the invocation.
     */
    private final Caller _caller;

    /**
     * The logger.
     */
    private static final Log _log = LogFactory.getLog(ChannelInvocation.class);


    /**
     * Construct a new <code>ChannelInvocation</code>.
     *
     * @param channel the channel to use
     * @param caller  the caller performing the invocation
     */
    public ChannelInvocation(Channel channel, Caller caller) {
        _channel = channel;
        _caller = caller;
    }

    /**
     * Reads the request from the channel.
     *
     * @return the request
     * @throws IOException if the request can't be read
     */
    public Request getRequest() throws IOException {
        return _channel.readRequest();
    }

    /**
     * Returns the caller performing the invocation.
     *
     * @return the caller
     */
    public Caller getCaller() {
        return _caller;
    }

    /**
     * Writes the response to the channel.
     *
     * @param response the response to write
     */
    public void setResponse(Response response) {
        try {
            _channel.writeResponse(response);
        } catch (Exception exception) {
            _log.debug(exception, exception);
        }
    }

}