/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2010-2011 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.jersey.server.impl.container.servlet;
import com.sun.jersey.server.impl.ThreadLocalNamedInvoker;
import com.sun.jersey.api.container.ContainerException;
import com.sun.jersey.api.core.ResourceConfig;
import com.sun.jersey.spi.container.WebApplication;
import com.sun.jersey.spi.container.servlet.ServletContainer;
import com.sun.jersey.spi.inject.Injectable;
import com.sun.jersey.spi.inject.InjectableProvider;
import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.core.spi.component.ComponentScope;
import java.lang.reflect.Proxy;
import java.lang.reflect.Type;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceUnit;
import javax.servlet.ServletConfig;
/**
* A servlet container for deploying root resource classes with support
* for injecting persistence units.
* <p>
* Persistence units that may be injected must be configured in web.xml
* in the normal way plus an additional servlet parameter to enable the
* Jersey servlet to locate them in JNDI. E.g. with the following
* persistence unit configuration:
*
* <persistence-unit-ref>
* <persistence-unit-ref-name>persistence/widget</persistence-unit-ref-name>
* <persistence-unit-name>WidgetPU</persistence-unit-name>
* </persistence-unit-ref>
*
* the Jersey servlet requires an additional servlet parameter as
* follows:
*
* <init-param>
* <param-name>unit:WidgetPU</param-name>
* <param-value>persistence/widget</param-value>
* </init-param>
*
* Given the above, Jersey will inject the EntityManagerFactory found
* at java:comp/env/persistence/widget in JNDI when encountering a
* field or parameter annotated with @PersistenceUnit(unitName="WidgetPU").
*/
public class ServletAdaptor extends ServletContainer {
private Map<String, String> persistenceUnits =
new HashMap<String, String>();
@Override
protected void configure(ServletConfig servletConfig, ResourceConfig rc, WebApplication wa) {
super.configure(servletConfig, rc, wa);
/**
* Look for persistent units.
*/
for (Enumeration e = servletConfig.getInitParameterNames() ; e.hasMoreElements() ;) {
String key = (String)e.nextElement();
String value = servletConfig.getInitParameter(key);
if (key.startsWith("unit:")) {
persistenceUnits.put(key.substring(5),"java:comp/env/"+value);
}
}
rc.getSingletons().add(new InjectableProvider<PersistenceUnit, Type>() {
@Override
public ComponentScope getScope() {
return ComponentScope.Singleton;
}
@Override
public Injectable<EntityManagerFactory> getInjectable(ComponentContext ic, PersistenceUnit pu, Type c) {
if (!c.equals(EntityManagerFactory.class))
return null;
// TODO localize error message
if (!persistenceUnits.containsKey(pu.unitName()))
throw new ContainerException("Persistence unit '"+
pu.unitName()+
"' is not configured as a servlet parameter in web.xml");
String jndiName = persistenceUnits.get(pu.unitName());
ThreadLocalNamedInvoker<EntityManagerFactory> emfHandler =
new ThreadLocalNamedInvoker<EntityManagerFactory>(jndiName);
final EntityManagerFactory emf = (EntityManagerFactory) Proxy.newProxyInstance(
this.getClass().getClassLoader(),
new Class[] { EntityManagerFactory.class },
emfHandler);
return new Injectable<EntityManagerFactory>() {
@Override
public EntityManagerFactory getValue() {
return emf;
}
};
}
});
}
}