com.sun.jersey.spi.spring.container.servlet.SpringServlet Maven / Gradle / Ivy
/*
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*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
*
* The contents of this file are subject to the terms of the Common Development
* and Distribution License("CDDL") (the "License"). You may not use this file
* except in compliance with the License.
*
* You can obtain a copy of the License at:
* https://jersey.dev.java.net/license.txt
* See the License for the specific language governing permissions and
* limitations under the License.
*
* When distributing the Covered Code, include this CDDL Header Notice in each
* file and include the License file at:
* https://jersey.dev.java.net/license.txt
* If applicable, add the following below this CDDL Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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package com.sun.jersey.spi.spring.container.servlet;
import com.sun.jersey.spi.spring.container.SpringComponentProviderFactory;
import com.sun.jersey.api.core.DefaultResourceConfig;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.web.context.ConfigurableWebApplicationContext;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
import org.springframework.web.context.support.XmlWebApplicationContext;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.core.spi.component.ioc.IoCComponentProviderFactory;
import com.sun.jersey.spi.container.WebApplication;
import com.sun.jersey.spi.container.servlet.ServletContainer;
import com.sun.jersey.spi.container.servlet.WebConfig;
import java.util.Map;
import javax.servlet.ServletException;
/**
* A servlet or filter for deploying root resource classes with Spring
* integration.
*
* This class extends {@link ServletContainer} and initiates the
* {@link WebApplication} with a Spring-based {@link IoCComponentProviderFactory},
* {@link SpringComponentProviderFactory}, such that instances of resource and
* provider classes declared and managed by Spring can be obtained.
*
* Classes of Spring beans declared using XML-based configuration or
* auto-wire-based confguration will be automatically registered if such
* classes are root resource classes or provider classes. It is not necessary
* to provide initialization parameters for declaring classes in the web.xml
* unless a mixture of Spring-managed and Jersey-managed classes is required.
*
* The servlet supports configuration of child applicationContexts,
* see {@link #CONTEXT_CONFIG_LOCATION}.
*
*
* @author Martin Grotzke
* @author [email protected]
* @author [email protected]
*/
public class SpringServlet extends ServletContainer {
private static final long serialVersionUID = 5686655395749077671L;
private static final Logger LOGGER = Logger.getLogger(SpringServlet.class.getName());
/**
* The context configuration location initialization parameter for declaring
* that a child context should be used for bean definitions. This feature
* can be used when configuration multiple Jersey/Spring servlets that
* contain different SPring-managed resources.
*
* The parameter name is the String "contextConfigLocation".
*
* A parameter value is a reference to one more spring configuration files
* separated by commas, semicolons or whitespace.
*
* distinct locations separated by commas, semicolons or whitespace
*
* If this parameter is absent then the default application context
* configuration is utilized.
*/
public static final String CONTEXT_CONFIG_LOCATION = "contextConfigLocation";
@Override
protected ResourceConfig getDefaultResourceConfig(Map props,
WebConfig webConfig) throws ServletException {
return new DefaultResourceConfig();
}
@Override
protected void initiate(ResourceConfig rc, WebApplication wa) {
try {
wa.initiate(rc, new SpringComponentProviderFactory(rc, getContext()));
} catch (RuntimeException e) {
LOGGER.log(Level.SEVERE, "Exception occurred when intialization", e);
throw e;
}
}
private ConfigurableApplicationContext getContext() {
final String contextConfigLocation = getWebConfig().getInitParameter(CONTEXT_CONFIG_LOCATION);
if (contextConfigLocation == null) {
LOGGER.info("Using default applicationContext");
return getDefaultContext();
} else {
LOGGER.info("Creating new child context from " + contextConfigLocation);
return getChildContext(contextConfigLocation);
}
}
private ConfigurableApplicationContext getChildContext(String contextConfigLocation) {
final ConfigurableWebApplicationContext ctx = new XmlWebApplicationContext();
ctx.setParent(getDefaultContext());
ctx.setServletContext(getServletContext());
ctx.setConfigLocation(contextConfigLocation);
ctx.refresh();
return ctx;
}
private ConfigurableApplicationContext getDefaultContext() {
final WebApplicationContext springWebContext =
WebApplicationContextUtils.getRequiredWebApplicationContext(getServletContext());
final ConfigurableApplicationContext springContext =
(ConfigurableApplicationContext) springWebContext;
return springContext;
}
}