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• Prehandler.java

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com.techempower.gemini.prehandler.Prehandler Maven / Gradle / Ivy

/*******************************************************************************
 * Copyright (c) 2018, TechEmpower, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name TechEmpower, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS 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 TECHEMPOWER, INC. 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
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 *******************************************************************************/

package com.techempower.gemini.prehandler;

import com.techempower.gemini.*;

/**
 * The Prehandler interface allows you to specify functionality to occur on 
 * each request, before the request is dispatched to the list of Handlers. 
 */
public interface Prehandler
{
  
  /**
   * Execute any code that should occur for all requests here.  Prehandlers
   * are executed for all requests, so the execution should be as quick as
   * possible.  Return true if the request has been handled and should not
   * be further dispatched to other Prehandlers and ultimately to a Handler.
   * Return false if the request has not been handled and the request should 
   * be dispatched to the remaining Prehandlers and then to a Handler as 
   * normal.
   */
  boolean prehandle(Context context);
  
}