001: /*
002: * The Apache Software License, Version 1.1
003: *
004: * Copyright (c) 1999 The Apache Software Foundation. All rights
005: * reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * 1. Redistributions of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: *
014: * 2. Redistributions in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * 3. The end-user documentation included with the redistribution, if
020: * any, must include the following acknowlegement:
021: * "This product includes software developed by the
022: * Apache Software Foundation (http://www.apache.org/)."
023: * Alternately, this acknowlegement may appear in the software itself,
024: * if and wherever such third-party acknowlegements normally appear.
025: *
026: * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
027: * Foundation" must not be used to endorse or promote products derived
028: * from this software without prior written permission. For written
029: * permission, please contact apache@apache.org.
030: *
031: * 5. Products derived from this software may not be called "Apache"
032: * nor may "Apache" appear in their names without prior written
033: * permission of the Apache Group.
034: *
035: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
036: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
037: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
038: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
039: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
040: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
041: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
042: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
043: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
044: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
045: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
046: * SUCH DAMAGE.
047: * ====================================================================
048: *
049: * This software consists of voluntary contributions made by many
050: * individuals on behalf of the Apache Software Foundation. For more
051: * information on the Apache Software Foundation, please see
052: * <http://www.apache.org/>.
053: *
054: */
055: package com.sun.portal.providers.jsp.jasper3.jasper.runtime;
056:
057: import javax.servlet.Servlet;
058: import javax.servlet.ServletRequest;
059: import javax.servlet.ServletResponse;
060:
061: // A@ changes for JSPProvider: we now import our own Jspfactory instead of
062: // the one from the JSP spec in order to have our own singleton
063: //import javax.servlet.jsp.JspFactory;
064: import com.sun.portal.providers.jsp.jasper3.jasper.JspFactory;
065:
066: import javax.servlet.jsp.JspEngineInfo;
067: import javax.servlet.jsp.PageContext;
068:
069: import com.sun.portal.providers.jsp.jasper3.tomcat.util.SimplePool;
070: import com.sun.portal.providers.jsp.jasper3.tomcat.logging.Logger;
071: import com.sun.portal.providers.jsp.jasper3.jasper.Constants;
072:
073: /**
074: * Implementation of JspFactory from the spec. Helps create
075: * PageContext and other animals.
076: *
077: * @author Anil K. Vijendran
078: */
079: public class JspFactoryImpl extends JspFactory {
080: private SimplePool pool = new SimplePool(100);
081: private static final boolean usePool = true;
082:
083: public PageContext getPageContext(Servlet servlet,
084: ServletRequest request, ServletResponse response,
085: String errorPageURL, boolean needsSession, int bufferSize,
086: boolean autoflush) {
087: try {
088: PageContext pc;
089: if (usePool) {
090: pc = (PageContextImpl) pool.get();
091: if (pc == null)
092: pc = new PageContextImpl(this );
093: } else {
094: pc = new PageContextImpl(this );
095: }
096:
097: // System.out.println("JspFactoryImpl.getPC" + pc);
098: pc.initialize(servlet, request, response, errorPageURL,
099: needsSession, bufferSize, autoflush);
100:
101: return pc;
102: } catch (Exception ex) {
103: Constants.jasperLog.log(Constants
104: .getString("jsp.error.pageContext.initialize"), ex,
105: Logger.ERROR);
106: return null;
107: }
108: }
109:
110: public void releasePageContext(PageContext pc) {
111: if (pc == null)
112: return;
113: pc.release();
114: if (usePool) {
115: pool.put(pc);
116: }
117: }
118:
119: static class SunJspEngineInfo extends JspEngineInfo {
120: public String getSpecificationVersion() {
121: return "1.1";
122: }
123: }
124:
125: static JspEngineInfo info = new SunJspEngineInfo();
126:
127: public JspEngineInfo getEngineInfo() {
128: return info;
129: }
130: }
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