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From cos...@apache.org
Subject cvs commit: jakarta-tomcat-jasper/jasper34/runtime/org/apache/jasper34/runtime RuntimeLiaison.java
Date Fri, 08 Jun 2001 05:42:59 GMT
costin      01/06/07 22:42:59

  Added:       jasper34/runtime/org/apache/jasper34/runtime
                        RuntimeLiaison.java
  Log:
  Initial prototype for the RuntimeLiaison, it will allow container to
  hook in and provide optimizations.
  
  RuntimeLiaison will be a critical piece for jasper performance, it is
  not used at this moment, I'm trying to organize it first.
  
  Revision  Changes    Path
  1.1                  jakarta-tomcat-jasper/jasper34/runtime/org/apache/jasper34/runtime/RuntimeLiaison.java
  
  Index: RuntimeLiaison.java
  ===================================================================
  /*
   * ====================================================================
   * 
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1999 The Apache Software Foundation.  All rights 
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer. 
   *
   * 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 end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:  
   *       "This product includes software developed by the 
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written 
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``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 THE APACHE SOFTWARE FOUNDATION 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */ 
  
  package org.apache.jasper34.runtime;
  
  import java.io.IOException;
  import java.io.Writer;
  
  import javax.servlet.*;
  
  // XXX This is just the first draft, to collect the likely hooks.
  // The actual interface will change as we implement it ( since
  // I have no idea what's going to be the best way to do this stuff )
  
  /**
   *  Interface between jasper runtime and the container. This allows
   *  containers to hook in and provide optimized operations.
   *
   *  A default implementation is provided and can be used for 
   *  "uncooperating" containers ( for example if JspServlet is used and
   *  we have no knowledge of the container ).
   *
   *  A container that is aware of jasper and has a Liaison will register
   *  it with jasper, and can provide special services and shortcut
   *  some layers.
   *
   *  @author Costin Manolache
   *
   */
  public abstract class RuntimeLiaison  {
      
      public RuntimeLiaison() {
      }
  
      /**
       *  Register a dependency between a servlet and a file. The
       *  default implementation will do nothing ( the checks will be
       *  done in checkExpire ).
       *
       *  A smarter implementation will use some depend manager that
       *  avoids multiple checks ( probably using the container dependency
       *  manager ).
       */
      public abstract void registerDependency( Servlet servlet, String file );
  
      /** Verify if the servlet is not expired
       */
      public abstract boolean checkExpire( Servlet servlet, String file[] );
      
      /** Send a chunk. The chunk must be registered.
       *  The default implementation will just do a
       *   out.println( chunks[id] ).
       *
       *  A smart implementation can pre-convert the String to bytes
       *  ( avoiding per/request overhead ), maintain a cache on the
       *  connector side ( avoiding communication overhead with the server),
       *
       *  XXX The interface will probably change, there are few other
       *  big things that need to be considered - for large chunks we
       *  could use a different API and a static file.
       */
      public abstract void sendChunk( Writer out, String chunks[], int id )
  	throws IOException;
  }
  
  
  

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