/*
* $Header: /home/cvs/jakarta-tomcat-jasper/jasper2/src/share/org/apache/jasper/runtime/JspFactoryImpl.java,v 1.4 2003/09/02 20:41:00 luehe Exp $
* $Revision: 1.4 $
* $Date: 2003/09/02 20:41:00 $
*
* ====================================================================
*
* 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"
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* 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.jasper.runtime;
import java.security.AccessController;
import java.security.PrivilegedAction;
import javax.servlet.Servlet;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.jsp.JspFactory;
import javax.servlet.jsp.JspEngineInfo;
import javax.servlet.jsp.PageContext;
import org.apache.jasper.util.SimplePool;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Implementation of JspFactory.
*
* @author Anil K. Vijendran
*/
public class JspFactoryImpl extends JspFactory {
// Logger
private static Log log = LogFactory.getLog(JspFactoryImpl.class);
private static final String SPEC_VERSION = "2.0";
private static final boolean USE_POOL = true;
private SimplePool pool = new SimplePool( 100 );
public PageContext getPageContext(Servlet servlet,
ServletRequest request,
ServletResponse response,
String errorPageURL,
boolean needsSession,
int bufferSize,
boolean autoflush) {
if( System.getSecurityManager() != null ) {
PrivilegedGetPageContext dp = new PrivilegedGetPageContext(
(JspFactoryImpl)this, servlet, request, response, errorPageURL,
needsSession, bufferSize, autoflush);
return (PageContext)AccessController.doPrivileged(dp);
} else {
return internalGetPageContext(servlet, request, response,
errorPageURL, needsSession,
bufferSize, autoflush);
}
}
public void releasePageContext(PageContext pc) {
if( pc == null )
return;
if( System.getSecurityManager() != null ) {
PrivilegedReleasePageContext dp = new PrivilegedReleasePageContext(
(JspFactoryImpl)this,pc);
AccessController.doPrivileged(dp);
} else {
internalReleasePageContext(pc);
}
}
public JspEngineInfo getEngineInfo() {
return new JspEngineInfo() {
public String getSpecificationVersion() {
return SPEC_VERSION;
}
};
}
private PageContext internalGetPageContext(Servlet servlet,
ServletRequest request,
ServletResponse response,
String errorPageURL,
boolean needsSession,
int bufferSize,
boolean autoflush) {
try {
PageContext pc;
if( USE_POOL ) {
pc = (PageContext) pool.get();
if( pc == null ) {
pc= new PageContextImpl(this);
}
} else {
pc = new PageContextImpl(this);
}
pc.initialize(servlet, request, response, errorPageURL,
needsSession, bufferSize, autoflush);
return pc;
} catch (Throwable ex) {
/* FIXME: need to do something reasonable here!! */
log.fatal("Exception initializing page context", ex);
return null;
}
}
private void internalReleasePageContext(PageContext pc) {
pc.release();
if (USE_POOL && (pc instanceof PageContextImpl)) {
pool.put( pc );
}
}
private class PrivilegedGetPageContext implements PrivilegedAction {
private JspFactoryImpl factory;
private Servlet servlet;
private ServletRequest request;
private ServletResponse response;
private String errorPageURL;
private boolean needsSession;
private int bufferSize;
private boolean autoflush;
PrivilegedGetPageContext(JspFactoryImpl factory,
Servlet servlet,
ServletRequest request,
ServletResponse response,
String errorPageURL,
boolean needsSession,
int bufferSize,
boolean autoflush) {
this.factory = factory;
this.servlet = servlet;
this.request = request;
this.response = response;
this.errorPageURL = errorPageURL;
this.needsSession = needsSession;
this.bufferSize = bufferSize;
this.autoflush = autoflush;
}
public Object run() {
return factory.internalGetPageContext(servlet,
request,
response,
errorPageURL,
needsSession,
bufferSize,
autoflush);
}
}
private class PrivilegedReleasePageContext implements PrivilegedAction {
private JspFactoryImpl factory;
private PageContext pageContext;
PrivilegedReleasePageContext(JspFactoryImpl factory,
PageContext pageContext) {
this.factory = factory;
this.pageContext = pageContext;
}
public Object run() {
factory.internalReleasePageContext(pageContext);
return null;
}
}
}