using System;
using System.Threading ;
using System.Collections;

namespace WebApplication1
{
	/// <summary>
	/// 并行搜索的類
	/// </summary>
	public class parallelSearch
	{
		private ArrayList _results= null;
		private string _keyword;
		private DateTime _started;
		private DateTime _end;
		public parallelSearch()
		{
			// 
			// TODO: 在此處添加構造函數邏輯
			//
		}

		private void addResult(result thisResult)
		{
			lock(_results)
			{_results.Add(thisResult);
			}
		}

		public TimeSpan totalTime
		{
			get { return _end.Subtract(_started);  }
	
		}
		public ArrayList search(string keyword  )
		{
			if (keyword==null && keyword=="")
				return null;

			_started=DateTime.Now;
			_keyword=keyword;
			_results=new ArrayList();


			Thread ps1=new Thread (new ThreadStart (searchWebSites));
            Thread ps2=new Thread (new ThreadStart (searchDatabases));
			Thread ps3=new Thread (new ThreadStart (searchDirectoryServers));
			

			ps1.Start ();
			ps2.Start ();
			ps3.Start ();



		    ps1.Join ();
			ps2.Join ();
			ps3.Join ();

			_end=DateTime.Now;
			return _results;

		}


		private void searchDatabases()
		{
			result r = new result("符合查詢關鍵字的記錄：\""+_keyword+"\"來自數據庫服務器中");
			try
			{
				Thread.Sleep(1000);
				r.links.Add( new link("書名- 《你今天心情不好嗎？》","HHFDESKTOP"));
				Thread.Sleep(1000);
				r.links.Add( new link("書名 - 《中國機械設計大典》","HHFDESKTOP"));
				Thread.Sleep(1000);
				r.links.Add( new link("書名 - 《甲骨文獻集成》","HHFDESKTOP"));
				r.message="查詢結果：" + r.links.Count+ "項";
				r.isCompleted =true;

		
			}
			catch(ThreadAbortException tae)
			{
				r.isCompleted =false;
				r.message ="查詢結果：" + r.links.Count+ "項"+"在操作取消之前";
			}
			catch(Exception e)
			{
				r.isCompleted=false;
				r.message ="查詢結果：" + r.links.Count+ "項"+"在操作出錯之前";
          
			
			}
			finally 
			{
				addResult(r);
		
			}
	
		}

		private void searchDirectoryServers()
		{
			result r = new result("符合查詢關鍵字的記錄：\""+_keyword+"\"來自目錄服務器中");
			try
			{
				Thread.Sleep(1000);
				r.links.Add( new link("員工 -書名 張大寶","/"));
				r.links.Add( new link("員工 - 書名 劉愛山","/"));
		
				r.message="查詢結果：:" + r.links.Count+ "項";
				r.isCompleted =true;

		
			}
			catch(ThreadAbortException tae)
			{
				r.isCompleted =false;
				r.message ="查詢結果：" + r.links.Count+ "項"+"在操作取消之前";
			}
			catch(Exception e)
			{
				r.isCompleted=false;
				r.message ="查詢結果：" + r.links.Count+ "項"+"在操作出錯之前";
          
			
			}
			finally 
			{
				addResult(r);
		
			}



		}


		private void searchWebSites()
		{


			result r = new result("符合查詢關鍵字的記錄：\""+_keyword+"\"來自WEB服務器中");
			try
			{
				Thread.Sleep(2000);
				r.links.Add( new link("簡體中文網頁-書名 《國王和國后》","HTTP://WWW.163.COM"));
				Thread.Sleep(1000);
				r.links.Add( new link("簡體中文網頁 -書名 《坐井之小青蛙》","HTTP://WWW.163.COM"));
				Thread.Sleep(1000);
				r.links.Add( new link("簡體中文網頁 -書名 《激情燃燒的歲月》","HTTP://WWW.163.COM"));
				Thread.Sleep(1000);
				r.links.Add( new link("簡體中文網頁 -書名《 林海雪原》","HTTP://WWW.163.COM"));

				r.message="查詢結果：" + r.links.Count+ "項";
				r.isCompleted =true;

		
			}
			catch(ThreadAbortException tae)
			{
			    r.isCompleted =false;
				r.message ="查詢結果：" + r.links.Count+ "項"+"在操作取消之前";
			}
			catch(Exception e)
			{
				r.isCompleted=false;
				r.message ="查詢結果：" + r.links.Count+ "項"+"在操作出錯之前";
          
			
			}
			finally 
			{
				addResult(r);
		
			}
		}




	}
}