com.caucho.jsp.JspManager Maven / Gradle / Ivy
/*
* Copyright (c) 1998-2018 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletConfig;
import javax.servlet.SingleThreadModel;
import javax.servlet.jsp.HttpJspPage;
import javax.servlet.jsp.JspFactory;
import com.caucho.java.LineMap;
import com.caucho.jsp.cfg.JspPropertyGroup;
import com.caucho.loader.DynamicClassLoader;
import com.caucho.loader.SimpleLoader;
import com.caucho.server.http.CauchoRequest;
import com.caucho.server.http.CauchoResponse;
import com.caucho.server.webapp.WebApp;
import com.caucho.util.L10N;
import com.caucho.vfs.Path;
import com.caucho.vfs.PersistentDependency;
import com.caucho.vfs.Vfs;
/**
* Manages JSP templates.
*/
public class JspManager extends PageManager {
private final static L10N L = new L10N(JspManager.class);
private final static Logger log
= Logger.getLogger(JspManager.class.getName());
private static int _count;
private boolean _isXml;
private boolean _isLoadTldOnInit;
private boolean _precompile = true;
private DynamicClassLoader _tagsLoader;
public JspManager()
{
if (JspFactory.getDefaultFactory() == null)
JspFactory.setDefaultFactory(new QJspFactory());
}
/**
* Returns true if JSP pages are precompiled.
*/
public boolean getPrecompile()
{
return _precompile;
}
/**
* Set true if xml is default.
*/
public void setXml(boolean isXml)
{
_isXml = isXml;
}
/**
* Set true if tld should be loaded on init.
*/
public void setLoadTldOnInit(boolean isLoadOnInit)
{
_isLoadTldOnInit = isLoadOnInit;
}
public static long getCheckInterval()
{
WebApp webApp = WebApp.getCurrent();
if (webApp == null)
return -1;
JspPropertyGroup jsp = webApp.getJsp();
if (jsp != null) {
return jsp.getDependencyCheckInterval();
}
else {
return -1;
}
}
/**
* Initialize the manager.
*/
public void init()
{
WebApp app = getWebApp();
app.getJspApplicationContext().setPageManager(this);
if (_isLoadTldOnInit) {
try {
TldManager tld = TldManager.create(new AppResourceManager(app), app);
// must be initialized at startup for , e.g. JSF
tld.init();
} catch (Exception e) {
log.log(Level.WARNING, e.toString(), e);
}
}
}
/**
* Creates a JSP page. The calling servlet will execute the page by
* calling the service method.
*
* @param path path to the JSP file
* @param uri the JSP's uri
* @param uriPwd the parent of the JSP's uri
*
* @return the compiled JSP page
*/
Page createGeneratedPage(Path path, String uri, String className,
ServletConfig config,
ArrayList dependList)
throws Exception
{
return createPage(path, uri, className, config, dependList, true);
}
/**
* Creates a JSP page. The calling servlet will execute the page by
* calling the service method.
*
* @param path path to the JSP file
* @param uri the JSP's uri
* @param uriPwd the parent of the JSP's uri
*
* @return the compiled JSP page
*/
@Override
Page createPage(Path path, String uri, String className,
ServletConfig config,
ArrayList dependList)
throws Exception
{
return createPage(path, uri, className, config, dependList, false);
}
/**
* Creates a JSP page. The calling servlet will execute the page by
* calling the service method.
*
* @param path path to the JSP file
* @param uri the JSP's uri
* @param uriPwd the parent of the JSP's uri
*
* @return the compiled JSP page
*/
private Page createPage(Path path, String uri, String className,
ServletConfig config,
ArrayList dependList,
boolean isGenerated)
throws Exception
{
Page page = compile(path, uri, className, config, dependList, isGenerated);
if (page == null)
return null;
// need to load class, too
//Page page = loadPage(jspClass, parseState.getLineMap(), req);
//page = loadPage(page, config, null);
boolean alwaysModified = false;
if (alwaysModified)
page._caucho_setAlwaysModified();
return page;
}
protected void initPageManager()
{
JspCompiler compiler = new JspCompiler();
compiler.setWebApp(_webApp);
compiler.setXml(_isXml);
try {
compiler.init();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
Page compile(Path path, String uri, String className,
ServletConfig config,
ArrayList dependList,
boolean isGenerated)
throws Exception
{
WebApp webApp = getWebApp();
JspCompiler compiler = new JspCompiler();
compiler.setJspManager(this);
compiler.setWebApp(_webApp);
compiler.setXml(_isXml);
Page page = null;
try {
if (_precompile || _autoCompile) {
page = preload(className, getParentLoader(), webApp.getRootDirectory(),
config);
}
} catch (Throwable e) {
log.log(Level.WARNING, e.toString(), e);
}
if (page != null) {
if (log.isLoggable(Level.FINE))
log.fine("loading pre-compiled page for " + uri);
return page;
}
if (path == null || path.isDirectory() || ! _autoCompile)
return null;
Path jspJarPath = null;
boolean isPathReadable = path.canRead();
if (! isPathReadable) {
String resource = "META-INF/resources" + uri;
_webApp.getClassLoader().getResource(resource);
URL url = _webApp.getClassLoader().getResource(resource);
if (url != null)
jspJarPath = Vfs.lookup(url);
}
if (! isPathReadable && jspJarPath == null) {
return null;
}
if (jspJarPath != null)
path = jspJarPath;
JspCompilerInstance compilerInst =
compiler.getCompilerInstance(path, uri, className);
compilerInst.setGeneratedSource(isGenerated);
compilerInst.addDependList(dependList);
//compiler.setParentLoader(getParentLoader());
//page = compilerInst.compile();
page = compilerInst.compile();
// second set required because tag class might change
//compiler.setParentLoader(getParentLoader());
//page = compilerInst.load();
Path classPath = getClassDir().lookup(className.replace('.', '/') +
".class");
loadPage(page, config, null, uri);
if (classPath.canRead())
page._caucho_addDepend(classPath.createDepend());
return page;
}
void killPage(CauchoRequest request, CauchoResponse response, Page page)
{
}
/**
* True if the pre-load would load a valid class.
*/
Page preload(String className,
ClassLoader parentLoader,
Path appDir,
ServletConfig config)
throws Exception
{
DynamicClassLoader loader;
String fullClassName = className;
String mangledName = fullClassName.replace('.', '/');
Path classPath = getClassDir().lookup(mangledName + ".class");
/*
if (! classPath.exists())
return preloadStatic(mangledName);
*/
loader = SimpleLoader.create(parentLoader, getClassDir(), null);
Class cl = null;
// If the loading fails, remove the class because it may be corrupted
try {
cl = Class.forName(fullClassName, false, loader);
} catch (ClassNotFoundException e) {
log.finest(e.toString());
return null;
} catch (NoClassDefFoundError e) {
log.finest(e.toString());
return null;
} catch (OutOfMemoryError e) {
throw e;
} catch (Throwable e) {
log.log(Level.FINEST, e.toString(), e);
if (_autoCompile) {
try {
log.warning("removing generated file " +
classPath + " due to " + e.toString());
classPath.remove();
} catch (IOException e1) {
log.log(Level.FINE, e1.toString(), e1);
}
}
return null;
}
HttpJspPage jspPage = (HttpJspPage) cl.newInstance();
Page page = null;
if (jspPage instanceof CauchoPage) {
CauchoPage cPage = (CauchoPage) jspPage;
cPage.init(appDir);
if (cPage instanceof Page)
((Page) cPage)._caucho_setJspManager(this);
if (_autoCompile && cPage._caucho_isModified())
return null;
else if (cPage instanceof Page)
page = (Page) cPage;
else
page = new WrapperPage(jspPage);
}
else if (jspPage instanceof SingleThreadModel)
page = new SingleThreadWrapperPage((HttpJspPage) jspPage);
else
page = new WrapperPage(jspPage);
page._caucho_addDepend(classPath.createDepend());
loadPage(page, config, null, className);
return page;
}
/**
* Loads an already-compiled JSP class.
*
* @param jspClass the class object of the JSP file.
* @param lineMap the java to JSP line map.
*/
private Page loadPage(Page page, ServletConfig config, LineMap lineMap,
String servletName)
throws Exception
{
page.init(_webApp.getRootDirectory());
page._caucho_setJspManager(this);
if (config == null)
config = new JspServletConfig(_webApp, null, servletName);
page.caucho_init(config);
return page;
}
ClassLoader getParentLoader()
{
return getTagsLoader();
}
ClassLoader getTagsLoader()
{
DynamicClassLoader tagsLoader = _tagsLoader;
if (tagsLoader != null && ! tagsLoader.isModifiedNow()) {
return tagsLoader;
}
ClassLoader parentLoader = getWebApp().getClassLoader();
tagsLoader = SimpleLoader.create(parentLoader, getClassDir(),
"_jsp/_web_22dinf/_tags");
_tagsLoader = tagsLoader;
return tagsLoader;
}
void unload(Page page)
{
}
}
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