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Replace web.xml with GreenhouseWebAppInitializer
Pom has been upgraded to servlet-api 3.0, and web.xml has been eliminated completely in favor of Spring 3.1's new WebApplicationInitializer SPI, which builds upon Servlet 3.0's ServletContainerInitializers. See WebApplicationInitializer Javadoc for complete details.
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src/main/java/com/springsource/greenhouse/config/GreenhouseWebAppInitializer.java
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/* | ||
* Copyright 2002-2011 the original author or authors. | ||
* | ||
* 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. | ||
*/ | ||
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package com.springsource.greenhouse.config; | ||
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import java.util.Set; | ||
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import javax.servlet.ServletContext; | ||
import javax.servlet.ServletException; | ||
import javax.servlet.ServletRegistration; | ||
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import org.springframework.web.WebApplicationInitializer; | ||
import org.springframework.web.context.ContextLoaderListener; | ||
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext; | ||
import org.springframework.web.context.support.GenericWebApplicationContext; | ||
import org.springframework.web.filter.DelegatingFilterProxy; | ||
import org.springframework.web.filter.HiddenHttpMethodFilter; | ||
import org.springframework.web.flash.FlashMapFilter; | ||
import org.springframework.web.servlet.DispatcherServlet; | ||
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/** | ||
* Code-based alternative to web.xml for use within Servlet 3.0+ environments. See | ||
* {@link WebApplicationInitializer} Javadoc for complete details. | ||
* | ||
* @author Chris Beams | ||
*/ | ||
public class GreenhouseWebAppInitializer implements WebApplicationInitializer { | ||
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/** | ||
* Register and configure all Servlet container components necessary to power the | ||
* Greenhouse web application. | ||
*/ | ||
@Override | ||
public void onStartup(ServletContext sc) throws ServletException { | ||
System.out.println("GreenhouseWebAppInitializer.onStartup()"); | ||
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// Create the 'root' Spring application context | ||
AnnotationConfigWebApplicationContext root = new AnnotationConfigWebApplicationContext(); | ||
root.scan("com.springsource.greenhouse.config"); | ||
root.getEnvironment().setDefaultProfiles("embedded"); | ||
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// Manages the lifecycle of the root application context | ||
sc.addListener(new ContextLoaderListener(root)); | ||
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// Allows attributes to be accessed on the next request | ||
sc.addFilter("flashMapFilter", FlashMapFilter.class) | ||
.addMappingForUrlPatterns(null, false, "/*"); | ||
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// Enables support for DELETE and PUT request methods with web browser clients | ||
sc.addFilter("hiddenHttpMethodFilter", HiddenHttpMethodFilter.class) | ||
.addMappingForUrlPatterns(null, false, "/*"); | ||
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// Secures the application | ||
sc.addFilter("securityFilter", new DelegatingFilterProxy("springSecurityFilterChain")) | ||
.addMappingForUrlPatterns(null, false, "/*"); | ||
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// Handles requests into the application | ||
ServletRegistration.Dynamic appServlet = | ||
sc.addServlet("appServlet", new DispatcherServlet(new GenericWebApplicationContext())); | ||
appServlet.setLoadOnStartup(1); | ||
Set<String> mappingConflicts = appServlet.addMapping("/"); | ||
if (!mappingConflicts.isEmpty()) { | ||
throw new IllegalStateException("'appServlet' could not be mapped to '/' due " + | ||
"to an existing mapping. This is a known issue under Tomcat versions " + | ||
"<= 7.0.14; see https://issues.apache.org/bugzilla/show_bug.cgi?id=51278"); | ||
} | ||
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// H2 Database Console for managing the app's database | ||
ServletRegistration.Dynamic h2Servlet = | ||
sc.addServlet("H2Console", org.h2.server.web.WebServlet.class); | ||
h2Servlet.setInitParameter("webAllowOthers", "true"); | ||
h2Servlet.setLoadOnStartup(2); | ||
h2Servlet.addMapping("/admin/h2/*"); | ||
} | ||
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} |
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Here is a clean sample project demonstrating xml-free-configuration: http://pyrolistical.github.com/blog/2011/10/23/spring-without-xml/