Package org.glassfish.admin.rest

Source Code of org.glassfish.admin.rest.LazyJerseyInit

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package org.glassfish.admin.rest;

import com.sun.grizzly.tcp.http11.GrizzlyAdapter;
import com.sun.jersey.api.container.ContainerFactory;
import com.sun.jersey.api.core.ResourceConfig;
import org.glassfish.api.container.EndpointRegistrationException;
import com.sun.grizzly.tcp.Adapter;
import com.sun.jersey.api.core.DefaultResourceConfig;
import java.util.Set;
import org.glassfish.internal.api.ServerContext;

/**
*
* @author ludovic champenois ludo@dev.java.net
*/
/**
* Class that initialize the Jersey container. It is called via introspection from RestAdapter
* so that RestAdapter does not depend on Jersey classes. This way, we gain 90ms at startup time
* and load the jersey classes only at the very last time, when needed.
* @author ludo
*/
public class LazyJerseyInit {

    LazyJerseyInit() {
    }

    /**
     * Called via introspection in the RestAdapter service() method only when the GrizzlyAdapter is not initialized
     * @param classes set of Jersey Resources classes
     * @param sc the current ServerContext, needed to finf the correct classpath
     * @return the correct GrizzlyAdapter
     * @throws EndpointRegistrationException
     */
    public static GrizzlyAdapter exposeContext(Set classes, ServerContext sc)
            throws EndpointRegistrationException {

        Adapter adapter = null;

        ResourceConfig rc = new DefaultResourceConfig(classes);

        //Use common classloader. Jersey artifacts are not visible through
        //module classloader
        ClassLoader originalContextClassLoader = Thread.currentThread().getContextClassLoader();
        try {
            ClassLoader apiClassLoader = sc.getCommonClassLoader();
            Thread.currentThread().setContextClassLoader(apiClassLoader);
            adapter = ContainerFactory.createContainer(com.sun.grizzly.tcp.Adapter.class, rc);
        } finally {
            Thread.currentThread().setContextClassLoader(originalContextClassLoader);
        }

        return (GrizzlyAdapter) adapter;
    }
}
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