interceptor.java

来自「提供ESB 应用mule源代码 提供ESB 应用mule源代码」· Java 代码 · 共 37 行

/*
 * $Id: Interceptor.java 12558 2008-08-25 19:09:19Z dfeist $
 * --------------------------------------------------------------------------------------
 * Copyright (c) MuleSource, Inc.  All rights reserved.  http://www.mulesource.com
 *
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */

package org.mule.api.interceptor;

import org.mule.api.MuleException;
import org.mule.api.MuleMessage;

/**
 * <code>Interceptor</code> is based on a similar concept of servlet filters and
 * works much the same way. This method is more commonally known as the interceptor
 * pattern and it allows for pre and processing of invocations on the object being
 * intercepted.
 */
public interface Interceptor
{

    /**
     * Invoked when the component should be called. The implementation can call
     * {@link Invocation#execute()} to call the component.
     * 
     * @param invocation the invocation containing info about the current message and
     *            service
     * @return A result message that may have been altered by this invocation
     * @throws org.mule.api.MuleException if the invocation fails
     */
    MuleMessage intercept(Invocation invocation) throws MuleException;

}