alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

What this is

This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Other links

The source code

/*
 * $Header: /home/cvs/jakarta-tomcat/src/share/org/apache/jasper/runtime/JspFactoryImpl.java,v 1.17 2004/02/23 06:26:32 billbarker Exp $
 * $Revision: 1.17 $
 * $Date: 2004/02/23 06:26:32 $
 *
 *
 *  Copyright 1999-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.apache.jasper.runtime;

import javax.servlet.Servlet;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.jsp.JspEngineInfo;
import javax.servlet.jsp.JspFactory;
import javax.servlet.jsp.PageContext;

import org.apache.tomcat.util.collections.SimplePool;
import org.apache.tomcat.util.log.Log;

/**
 * Implementation of JspFactory from the spec. Helps create
 * PageContext and other animals.  
 *
 * @author Anil K. Vijendran
 */
public class JspFactoryImpl extends JspFactory {
    public static final int DEFAULT_POOL_SIZE=100;
    private SimplePool pool;
    private boolean usePool=true;
    static String lineSeparator;
    static {
	try {
	    lineSeparator =  System.getProperty("line.separator");
	} catch( RuntimeException ex ) {
	    lineSeparator="\r\n";
	}
	// This whole things allows us to set the writer line
	// separator when we init jasper, i.e. in priv. mode -
	// without it we would need a priviledged action.
	JspWriterImpl.lineSeparator=lineSeparator;
    }

    public JspFactoryImpl() {
	pool=new SimplePool( DEFAULT_POOL_SIZE );
	usePool=true;
    }

    public JspFactoryImpl( int size ) {
	if( size==0 ) {
	    pool=null;
	    usePool=false;
	} else {
	    pool=new SimplePool( size );
	}
    }
    

    Log loghelper = Log.getLog("JASPER_LOG", "JspFactoryImpl");
    
    public PageContext getPageContext(Servlet servlet, ServletRequest request,
                                      ServletResponse response, 
				      String errorPageURL, 
                                      boolean needsSession, int bufferSize, 
                                      boolean autoflush) 
    {
        try {
	    PageContext pc;
	    if( usePool ) {
		pc=(PageContext)pool.get();
		if( pc == null ) pc= new PageContextImpl(this);
	    } else {
		pc =  new PageContextImpl(this);
	    }

	    //	    System.out.println("JspFactoryImpl.getPC"  + pc);
	    pc.initialize(servlet, request, response, errorPageURL, 
                          needsSession, bufferSize, autoflush);
	    
            return pc;
        } catch (Throwable ex) {
            /* FIXME: need to do something reasonable here!! */
	    loghelper.log("Exception initializing page context", ex);
            return null;
        }
    }

    public void releasePageContext(PageContext pc) {
	if( pc==null ) return;
	pc.release();
	if( usePool) {
	    pool.put( pc );
	}
    }

    static class SunJspEngineInfo extends JspEngineInfo {
        public String getSpecificationVersion() {
            return "1.1";
        }
    }
    
    static JspEngineInfo info = new SunJspEngineInfo();

    public JspEngineInfo getEngineInfo() {
        return info;
    }
}
... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.