/src/NUnit/util/Services/ServiceManager.cs

  1// ****************************************************************
  2// Copyright 2007, Charlie Poole
  3// This is free software licensed under the NUnit license. You may
  4// obtain a copy of the license at http://nunit.org
  5// ****************************************************************
  6
  7using System;
  8using System.Collections;
  9using NUnit.Core;
 10
 11namespace NUnit.Util
 12{
 13	/// <summary>
 14	/// Summary description for ServiceManger.
 15	/// </summary>
 16	public class ServiceManager
 17	{
 18		private ArrayList services = new ArrayList();
 19		private Hashtable serviceIndex = new Hashtable();
 20
 21		private static ServiceManager defaultServiceManager = new ServiceManager();
 22
 23		static Logger log = InternalTrace.GetLogger(typeof(ServiceManager));
 24
 25		public static ServiceManager Services
 26		{
 27			get { return defaultServiceManager; }
 28		}
 29
 30		public void AddService( IService service )
 31		{
 32			services.Add( service );
 33			log.Debug( "Added " + service.GetType().Name );
 34		}
 35
 36		public IService GetService( Type serviceType )
 37		{
 38			IService theService = (IService)serviceIndex[serviceType];
 39			if ( theService == null )
 40				foreach( IService service in services )
 41				{
 42					// TODO: Does this work on Mono?
 43					if( serviceType.IsInstanceOfType( service ) )
 44					{
 45						serviceIndex[serviceType] = service;
 46						theService = service;
 47						break;
 48					}
 49				}
 50
 51			if ( theService == null )
 52				log.Error( string.Format( "Requested service {0} was not found", serviceType.FullName ) );
 53			else
 54				log.Debug( string.Format( "Request for service {0} satisfied by {1}", serviceType.Name, theService.GetType().Name ) );
 55			
 56			return theService;
 57		}
 58
 59		public void InitializeServices()
 60		{
 61			foreach( IService service in services )
 62			{
 63				log.Info( "Initializing " + service.GetType().Name );
 64                try
 65                {
 66                    service.InitializeService();
 67                }
 68                catch (Exception ex)
 69                {
 70                    log.Error("Failed to initialize service", ex);
 71                }
 72			}
 73		}
 74
 75		public void StopAllServices()
 76		{
 77			// Stop services in reverse of initialization order
 78			// TODO: Deal with dependencies explicitly
 79			int index = services.Count;
 80            while (--index >= 0)
 81            {
 82                IService service = services[index] as IService;
 83                log.Info( "Stopping " + service.GetType().Name );
 84                try
 85                {
 86                    service.UnloadService();
 87                }
 88                catch (Exception ex)
 89                {
 90                    log.Error("Failure stopping service", ex);
 91                }
 92            }
 93		}
 94
 95		public void ClearServices()
 96		{
 97            log.Info("Clearing Service list");
 98			services.Clear();
 99		}
100
101		private ServiceManager() { }
102	}
103}