org.apache.struts2.dispatcher.servlet.StrutsServlet Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.struts2.dispatcher.servlet;
import org.apache.struts2.dispatcher.Dispatcher;
import org.apache.struts2.dispatcher.mapper.ActionMapping;
import org.apache.struts2.dispatcher.ExecuteOperations;
import org.apache.struts2.dispatcher.InitOperations;
import org.apache.struts2.dispatcher.PrepareOperations;
import org.apache.struts2.dispatcher.servlet.ServletHostConfig;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* Servlet dispatcher for Struts. The preferred way to use Struts is as a filter via the
* {@link org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter} and its variants. This servlet dispatcher
* is only for those that really know what they are doing as it may not support every feature of Struts, particularly
* static resource serving.
*/
public class StrutsServlet extends HttpServlet {
private PrepareOperations prepare;
private ExecuteOperations execute;
@Override
public void init(ServletConfig filterConfig) throws ServletException {
InitOperations init = new InitOperations();
Dispatcher dispatcher = null;
try {
ServletHostConfig config = new ServletHostConfig(filterConfig);
init.initLogging(config);
dispatcher = init.initDispatcher(config);
init.initStaticContentLoader(config, dispatcher);
prepare = new PrepareOperations(dispatcher);
execute = new ExecuteOperations(dispatcher);
} finally {
if (dispatcher != null) {
dispatcher.cleanUpAfterInit();
}
init.cleanup();
}
}
@Override
public void service(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
try {
prepare.createActionContext(request, response);
prepare.assignDispatcherToThread();
prepare.setEncodingAndLocale(request, response);
request = prepare.wrapRequest(request);
ActionMapping mapping = prepare.findActionMapping(request, response);
if (mapping == null) {
boolean handled = execute.executeStaticResourceRequest(request, response);
if (!handled)
throw new ServletException("Resource loading not supported, use the StrutsPrepareAndExecuteFilter instead.");
} else {
execute.executeAction(request, response, mapping);
}
} finally {
prepare.cleanupRequest(request);
}
}
@Override
public void destroy() {
prepare.cleanupDispatcher();
}
}