| /* |
| * 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 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 Log log = LogFactory.getLog(JspFactoryImpl.class); |
| |
| private static final String SPEC_VERSION = "2.0"; |
| private static final boolean USE_POOL = |
| Boolean.valueOf(System.getProperty("org.apache.jasper.runtime.JspFactoryImpl.USE_POOL", "true")).booleanValue(); |
| |
| 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; |
| } |
| } |
| } |