dataprovider.cs

SharpNuke源代码

using System;
using System.Data;
using System.Collections;
using System.Reflection;
using System.Web.Caching;

using DotNetNuke.Common.Utilities;
using DotNetNuke.Services.Exceptions;
using DotNetNuke.Framework.Providers;

//
// DotNetNuke -  http://www.dotnetnuke.com
// Copyright (c) 2002-2005
// by Shaun Walker ( [e-mail] ) of Perpetual Motion Interactive Systems Inc. ( http://www.perpetualmotion.ca )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//

namespace DotNetNuke.Services.Scheduling.DNNScheduling
{
	public abstract class DataProvider
	{
		
		// provider constants - eliminates need for Reflection later
		private const string providerType = "data"; // maps to <sectionGroup> in web.config
		private const string providerNamespace = "DotNetNuke.Services.Scheduling.DNNScheduling"; // project namespace
		private const string providerAssemblyName = "DotNetNuke.DNNScheduler"; // project assemblyname
		
		public static DataProvider Instance()
		{
			
			string cacheKey = providerNamespace + "." + providerType + "provider";
			
			// Use the cache because the reflection used later is expensive
			ConstructorInfo constructor = ((ConstructorInfo) DataCache.GetCache(cacheKey));
			
			if (constructor == null)
			{
				// Get the provider configuration based on the type
				ProviderConfiguration providerConfiguration = ProviderConfiguration.GetProviderConfiguration(providerType);
				
				// The assembly should be in \bin or GAC, so we simply need to get an instance of the type
				try
				{
					// Override the typename if a ProviderName is specified ( this allows the application to load a different DataProvider assembly for custom modules )
					string typeName = providerNamespace + "." + providerConfiguration.DefaultProvider + ", " + providerAssemblyName + "." + providerConfiguration.DefaultProvider;
					
					// Use reflection to store the constructor of the class that implements DataProvider
					Type type = Type.GetType(typeName, true);
					constructor = type.GetConstructor(System.Type.EmptyTypes);
					
					// Insert the type into the cache
					DataCache.SetCache(cacheKey, constructor);
					
				}
				catch (Exception exception)
				{
					// Could not load the provider - this is likely due to binary compatibility issues
					Exceptions.Exceptions.ProcessSchedulerException(exception);
				}
			}
			return ((DataProvider) constructor.Invoke(null));
		}
		
		// all core methods defined below
		
		public abstract IDataReader GetSchedule();
		public abstract IDataReader GetSchedule(string server);
		public abstract IDataReader GetSchedule(int scheduleID);
		public abstract IDataReader GetSchedule(string typeFullName, string server);
		public abstract IDataReader GetNextScheduledTask(string server);
		
		public abstract IDataReader GetScheduleByEvent(string eventName, string server);
		public abstract IDataReader GetScheduleHistory(int scheduleID);
		
		public abstract int AddSchedule(string typeFullName, int timeLapse, string timeLapseMeasurement, int retryTimeLapse, 
			string retryTimeLapseMeasurement, int retainHistoryNum, string attachToEvent, bool catchUpEnabled, 
			bool enabled, string objectDependencies, string servers);
		public abstract void UpdateSchedule (int scheduleID, string typeFullName, int timeLapse, string TimeLapseMeasurement, 
			int retryTimeLapse, string retryTimeLapseMeasurement, int retainHistoryNum, string attachToEvent, 
			bool catchUpEnabled, bool enabled, string objectDependencies, string servers);
		public abstract void DeleteSchedule (int scheduleID);
		public abstract IDataReader GetScheduleItemSettings(int scheduleID);
		public abstract int AddScheduleHistory(int scheduleID, DateTime startDate, string server);
		public abstract void UpdateScheduleHistory (int scheduleHistoryID, DateTime endDate, bool succeeded, string logNotes, DateTime nextStart);
		public abstract void PurgeScheduleHistory ();
		
	}
	
}