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/**
 * SCA4J
 * Copyright (c) 2009 - 2099 Service Symphony Ltd
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 *
 * This project contains code licensed from the Apache Software Foundation under
 * the Apache License, Version 2.0 and original code from project contributors.
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package org.sca4j.spi.wire;

import org.sca4j.spi.invocation.Message;

/**
 * Synchronous, around-style mediation associated with wire.
 *
 * @version $Rev: 3021 $ $Date: 2008-03-04 03:28:04 +0000 (Tue, 04 Mar 2008) $
 */
public interface Interceptor {

    /**
     * Process a synchronous wire
     *
     * @param msg the request Message for the wire
     * @return the response Message from the wire
     */
    Message invoke(Message msg);

    /**
     * Sets the next interceptor
     *
     * @param next the next interceptor
     */
    void setNext(Interceptor next);

    /**
     * Returns the next interceptor or null
     *
     * @return he next interceptor or null
     */
    Interceptor getNext();

}