org.apache.jasper.servlet.ServletEngine Maven / Gradle / Ivy
/*
* 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.servlet;
import javax.servlet.ServletContext;
/**
* Simple class to factor out servlet runner dependencies from the JSP
* engine. There's a few motivations here:
*
* (a) ability for the JSP engine to be able to run on multiple
* servlet engines - 2.1 and 2.2
* (b) ability for the JSP engine to take advantage of specific
* servlet engines; this is crucial from a J2EE point of
* view.
*
* @author Anil K. Vijendran
* @author Harish Prabandham
*/
public class ServletEngine {
static ServletEngine tomcat;
static ServletEngine deflt;
/**
* Get a specific ServletEngine instance for the particular servlet runner
* we are running on.
*/
static ServletEngine getServletEngine(String serverInfo) {
if (serverInfo.startsWith("Tomcat Web Server")) {
if (tomcat == null) {
try {
tomcat = (ServletEngine)
Class.forName("org.apache.jasper.runtime.TomcatServletEngine").newInstance();
} catch (Exception ex) {
return null;
}
}
return tomcat;
} else {
if (deflt == null)
deflt = new ServletEngine();
return deflt;
}
}
/**
* Get the class loader for this ServletContext object.
*/
public ClassLoader getClassLoader(ServletContext ctx) {
return null;
}
}