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package com.sun.enterprise.naming;

import java.rmi.*;

import java.util.logging.*;
import com.sun.logging.*;

/**
 * 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 {

    // This is a singleton.
    private static ProviderManager providerManager;
    private TransientContext rootContext = new TransientContext();
    private SerialContextProvider localProvider;
    private boolean initRemoteProviderDone = false;
    static Logger _logger = LogDomains.getLogger(LogDomains.JNDI_LOGGER);
  
    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.getProvider(rootContext);
	}
	return localProvider;
    }

    public synchronized void initRemoteProvider() throws RemoteException {
	if (initRemoteProviderDone == false) {	 
 	 
	    RemoteSerialContextProviderImpl.initSerialContextProvider(rootContext);
	    initRemoteProviderDone = true;
	}
    }


}