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A bundle containing code of all jar-based modules that provide JAX-RS and Jersey-related features. Such a bundle is *only intended* for developers that do not use Maven's dependency system. The bundle does not include code for contributes, tests and samples.

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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.
 * 

* 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/widget * WidgetPU * * * the Jersey servlet requires an additional servlet parameter as * follows: * * * unit:WidgetPU * persistence/widget * * * 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 persistenceUnits = new HashMap(); @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() { @Override public ComponentScope getScope() { return ComponentScope.Singleton; } @Override public Injectable 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 emfHandler = new ThreadLocalNamedInvoker(jndiName); final EntityManagerFactory emf = (EntityManagerFactory) Proxy.newProxyInstance( this.getClass().getClassLoader(), new Class[] { EntityManagerFactory.class }, emfHandler); return new Injectable() { @Override public EntityManagerFactory getValue() { return emf; } }; } }); } }





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