private <R extends Service> R initializeService(ServiceBinding<R> serviceBinding) {
	if ( log.isTraceEnabled() ) {
		log.tracev( "Initializing service [role={0}]", serviceBinding.getServiceRole().getName() );
	}

	// PHASE 1 : create service
	R service = createService( serviceBinding );
	if ( service == null ) {
		return null;
	}

	// PHASE 2 : inject service (***potentially recursive***)
	serviceBinding.getLifecycleOwner().injectDependencies( serviceBinding );

	// PHASE 3 : configure service
	serviceBinding.getLifecycleOwner().configureService( serviceBinding );

	// PHASE 4 : Start service
	serviceBinding.getLifecycleOwner().startService( serviceBinding );

	return service;
}
 

@Override
@SuppressWarnings( {"unchecked"})
public synchronized void destroy() {
	if ( active.compareAndSet( true, false ) ) {
		try {
			//First thing, make sure that the fast path read is disabled so that
			//threads not owning the synchronization lock can't get an invalid Service:
			initializedServiceByRole.clear();
			synchronized (serviceBindingList) {
				ListIterator<ServiceBinding> serviceBindingsIterator = serviceBindingList.listIterator(
						serviceBindingList.size()
				);
				while ( serviceBindingsIterator.hasPrevious() ) {
					final ServiceBinding serviceBinding = serviceBindingsIterator.previous();
					serviceBinding.getLifecycleOwner().stopService( serviceBinding );
				}
				serviceBindingList.clear();
			}
			serviceBindingMap.clear();
		}
		finally {
			parent.deRegisterChild( this );
		}
	}
}
 

/**
 * Constructs a BootstrapServiceRegistryImpl.
 *
 * Do not use directly generally speaking.  Use {@link org.hibernate.boot.registry.BootstrapServiceRegistryBuilder}
 * instead.
 *
 * @param autoCloseRegistry See discussion on
 * {@link org.hibernate.boot.registry.BootstrapServiceRegistryBuilder#disableAutoClose}
 * @param classLoaderService The ClassLoaderService to use
 * @param providedIntegrators The group of explicitly provided integrators
 *
 * @see org.hibernate.boot.registry.BootstrapServiceRegistryBuilder
 */
public BootstrapServiceRegistryImpl(
		boolean autoCloseRegistry,
		ClassLoaderService classLoaderService,
		LinkedHashSet<Integrator> providedIntegrators) {
	this.autoCloseRegistry = autoCloseRegistry;

	this.classLoaderServiceBinding = new ServiceBinding<ClassLoaderService>(
			this,
			ClassLoaderService.class,
			classLoaderService
	);

	final StrategySelectorImpl strategySelector = new StrategySelectorImpl( classLoaderService );
	this.strategySelectorBinding = new ServiceBinding<StrategySelector>(
			this,
			StrategySelector.class,
			strategySelector
	);

	this.integratorServiceBinding = new ServiceBinding<IntegratorService>(
			this,
			IntegratorService.class,
			new IntegratorServiceImpl( providedIntegrators, classLoaderService )
	);
}
 

/**
 * Constructs a BootstrapServiceRegistryImpl.
 *
 * Do not use directly generally speaking.  Use {@link org.hibernate.boot.registry.BootstrapServiceRegistryBuilder}
 * instead.
 *
 * @param autoCloseRegistry See discussion on
 * {@link org.hibernate.boot.registry.BootstrapServiceRegistryBuilder#disableAutoClose}
 * @param classLoaderService The ClassLoaderService to use
 * @param strategySelector The StrategySelector to use
 * @param integratorService The IntegratorService to use
 *
 * @see org.hibernate.boot.registry.BootstrapServiceRegistryBuilder
 */
public BootstrapServiceRegistryImpl(
		boolean autoCloseRegistry,
		ClassLoaderService classLoaderService,
		StrategySelector strategySelector,
		IntegratorService integratorService) {
	this.autoCloseRegistry = autoCloseRegistry;

	this.classLoaderServiceBinding = new ServiceBinding<ClassLoaderService>(
			this,
			ClassLoaderService.class,
			classLoaderService
	);

	this.strategySelectorBinding = new ServiceBinding<StrategySelector>(
			this,
			StrategySelector.class,
			strategySelector
	);

	this.integratorServiceBinding = new ServiceBinding<IntegratorService>(
			this,
			IntegratorService.class,
			integratorService
	);
}
 

protected <R extends Service> void createServiceBinding(ProvidedService<R> providedService) {
	ServiceBinding<R> binding = locateServiceBinding( providedService.getServiceRole(), false );
	if ( binding == null ) {
		binding = new ServiceBinding<R>( this, providedService.getServiceRole(), providedService.getService() );
		serviceBindingMap.put( providedService.getServiceRole(), binding );
	}
	registerService( binding, providedService.getService() );
}
 

@Override
public <R extends Service> R getService(Class<R> serviceRole) {
	// TODO: should an exception be thrown if active == false???
	R service = serviceRole.cast( initializedServiceByRole.get( serviceRole ) );
	if ( service != null ) {
		return service;
	}

	//Any service initialization needs synchronization
	synchronized ( this ) {
		// Check again after having acquired the lock:
		service = serviceRole.cast( initializedServiceByRole.get( serviceRole ) );
		if ( service != null ) {
			return service;
		}

		final ServiceBinding<R> serviceBinding = locateServiceBinding( serviceRole );
		if ( serviceBinding == null ) {
			throw new UnknownServiceException( serviceRole );
		}
		service = serviceBinding.getService();
		if ( service == null ) {
			service = initializeService( serviceBinding );
		}
		if ( service != null ) {
			// add the service only after it is completely initialized
			initializedServiceByRole.put( serviceRole, service );
		}
		return service;
	}
}
 

@Override
public <R extends Service> void injectDependencies(ServiceBinding<R> serviceBinding) {
	final R service = serviceBinding.getService();

	applyInjections( service );

	if ( ServiceRegistryAwareService.class.isInstance( service ) ) {
		( (ServiceRegistryAwareService) service ).injectServices( this );
	}
}
 

@Override
@SuppressWarnings({ "unchecked" })
public <R extends Service> void startService(ServiceBinding<R> serviceBinding) {
	if ( Startable.class.isInstance( serviceBinding.getService() ) ) {
		( (Startable) serviceBinding.getService() ).start();
	}

	if ( Manageable.class.isInstance( serviceBinding.getService() ) ) {
		getService( JmxService.class ).registerService(
				(Manageable) serviceBinding.getService(),
				serviceBinding.getServiceRole()
		);
	}
}
 

@Override
public <R extends Service> void stopService(ServiceBinding<R> binding) {
	final Service service = binding.getService();
	if ( Stoppable.class.isInstance( service ) ) {
		try {
			( (Stoppable) service ).stop();
		}
		catch ( Exception e ) {
			log.unableToStopService( service.getClass(), e.toString() );
		}
	}
}
 

@Override
@SuppressWarnings( {"unchecked"})
public <R extends Service> ServiceBinding<R> locateServiceBinding(Class<R> serviceRole) {
	if ( ClassLoaderService.class.equals( serviceRole ) ) {
		return (ServiceBinding<R>) classLoaderServiceBinding;
	}
	else if ( StrategySelector.class.equals( serviceRole) ) {
		return (ServiceBinding<R>) strategySelectorBinding;
	}
	else if ( IntegratorService.class.equals( serviceRole ) ) {
		return (ServiceBinding<R>) integratorServiceBinding;
	}

	return null;
}
 

@Override
public <R extends Service> void stopService(ServiceBinding<R> binding) {
	final Service service = binding.getService();
	if ( Stoppable.class.isInstance( service ) ) {
		try {
			( (Stoppable) service ).stop();
		}
		catch ( Exception e ) {
			LOG.unableToStopService( service.getClass(), e.toString() );
		}
	}
}
 

@Override
public <R extends Service> ServiceBinding<R> locateServiceBinding(Class<R> serviceRole) {
    return null;
}
 

@Override
public <R extends Service> void configureService(ServiceBinding<R> serviceBinding) {
	if ( Configurable.class.isInstance( serviceBinding.getService() ) ) {
		( (Configurable) serviceBinding.getService() ).configure( getService( ConfigurationService.class ).getSettings() );
	}
}
 

@SuppressWarnings({ "unchecked" })
protected <R extends Service> void createServiceBinding(ServiceInitiator<R> initiator) {
	final ServiceBinding serviceBinding = new ServiceBinding( this, initiator );
	serviceBindingMap.put( initiator.getServiceInitiated(), serviceBinding );
}
 

protected void visitServiceBindings(Consumer<ServiceBinding> action) {
	serviceBindingList.forEach( action );
}
 

@Override
@SuppressWarnings({ "unchecked" })
public <R extends Service> ServiceBinding<R> locateServiceBinding(Class<R> serviceRole) {
	return locateServiceBinding( serviceRole, true );
}
 

@SuppressWarnings({ "unchecked" })
protected <R extends Service> ServiceBinding<R> locateServiceBinding(Class<R> serviceRole, boolean checkParent) {
	ServiceBinding<R> serviceBinding = serviceBindingMap.get( serviceRole );
	if ( serviceBinding == null && checkParent && parent != null ) {
		// look in parent
		serviceBinding = parent.locateServiceBinding( serviceRole );
	}

	if ( serviceBinding != null ) {
		return serviceBinding;
	}

	if ( !allowCrawling ) {
		return null;
	}

	// look for a previously resolved alternate registration
	final Class alternative = roleXref.get( serviceRole );
	if ( alternative != null ) {
		return serviceBindingMap.get( alternative );
	}

	// perform a crawl looking for an alternate registration
	for ( ServiceBinding binding : serviceBindingMap.values() ) {
		if ( serviceRole.isAssignableFrom( binding.getServiceRole() ) ) {
			// we found an alternate...
			log.alternateServiceRole( serviceRole.getName(), binding.getServiceRole().getName() );
			registerAlternate( serviceRole, binding.getServiceRole() );
			return binding;
		}

		if ( binding.getService() != null && serviceRole.isInstance( binding.getService() ) ) {
			// we found an alternate...
			log.alternateServiceRole( serviceRole.getName(), binding.getServiceRole().getName() );
			registerAlternate( serviceRole, binding.getServiceRole() );
			return binding;
		}
	}

	return null;
}
 

protected <R extends Service> void registerService(ServiceBinding<R> serviceBinding, R service) {
	serviceBinding.setService( service );
	synchronized ( serviceBindingList ) {
		serviceBindingList.add( serviceBinding );
	}
}
 

@Override
public <R extends Service> R getService(Class<R> serviceRole) {
	final ServiceBinding<R> binding = locateServiceBinding( serviceRole );
	return binding == null ? null : binding.getService();
}
 

private void destroy(ServiceBinding serviceBinding) {
	serviceBinding.getLifecycleOwner().stopService( serviceBinding );
}
 

@Override
public <R extends Service> void configureService(ServiceBinding<R> binding) {
	throw new ServiceException( "Boot-strap registry should only contain provided services" );
}
 

@Override
public <R extends Service> void injectDependencies(ServiceBinding<R> binding) {
	throw new ServiceException( "Boot-strap registry should only contain provided services" );
}
 

@Override
public <R extends Service> void startService(ServiceBinding<R> binding) {
	throw new ServiceException( "Boot-strap registry should only contain provided services" );
}
 

@Override
public <R extends Service> void configureService(ServiceBinding<R> serviceBinding) {
	if ( Configurable.class.isInstance( serviceBinding.getService() ) ) {
		( (Configurable) serviceBinding.getService() ).configure( configurationValues );
	}
}