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/*
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 *
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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
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 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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 */

package com.sun.enterprise.naming.impl;

import org.omg.CORBA.ORB;

import java.rmi.Remote;
import java.rmi.RemoteException;


/**
 * This class is a facade for the remote and local SerialContextProvider The
 * need for this class arose from the fact that we wanted to have a way of
 * lazily initializing the Remote SerialContextProvider. The TransientContext
 * member field has to be shared across both remote and local
 * SerialContextProvider. It could have been a static variable but to avoid
 * issues of static variables with multiple threads, etc, this class has been
 * designed. The ORB needs to be initialized before the call to
 * initRemoteProvider()
 *
 * @author Sheetal Vartak
 */

public class ProviderManager {

    private static ProviderManager providerManager;

    private TransientContext rootContext = new TransientContext();

    private SerialContextProvider localProvider;

    // Set lazily once initRemoteProvider is called.  Only available
    // in server.
    private ORB orb;

    private ProviderManager() {}

    public synchronized static ProviderManager getProviderManager() {
	    if (providerManager  == null ) {
	        providerManager = new ProviderManager();
        }
	    return providerManager;
    }
    
    public TransientContext getTransientContext() {
        return rootContext;
    }

    public synchronized SerialContextProvider getLocalProvider() {
        if (localProvider == null) {
            localProvider = LocalSerialContextProviderImpl.initProvider(rootContext);
        }
        return localProvider;
    }

    public Remote initRemoteProvider(ORB orb) throws RemoteException {
        this.orb = orb;
        return RemoteSerialContextProviderImpl.initSerialContextProvider(orb, rootContext);
    }

    ORB getORB() {
        return orb;
    }
}