94 lines
2.8 KiB
C#
94 lines
2.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.IO;
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namespace MarketData.Utils
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{
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public class UpdateManager
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{
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private StreamWriter streamWriter=null;
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private FileStream fileStream=null;
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private Dictionary<String,String> entries=new Dictionary<String,String>();
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public UpdateManager()
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{
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}
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public bool Prepare(String strPathFileName)
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{
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try
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{
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String currentWorkingDirectory=Directory.GetCurrentDirectory();
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if(!File.Exists(strPathFileName)||IsExpired(strPathFileName))
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{
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if(File.Exists(strPathFileName))File.Delete(strPathFileName);
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fileStream=new FileStream(strPathFileName,FileMode.Create);
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streamWriter=new StreamWriter(fileStream);
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Console.WriteLine(String.Format("Creating session file:{0}",strPathFileName));
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}
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else
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{
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FileStream fileStream=new FileStream(strPathFileName,FileMode.Open);
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StreamReader streamReader=new StreamReader(fileStream);
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String strLine=null;
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while(null!=(strLine=streamReader.ReadLine()))
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{
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if(!entries.ContainsKey(strLine))entries.Add(strLine,strLine);
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}
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Console.WriteLine(String.Format("Loaded {0} entries from session file:{1}",entries.Count,strPathFileName));
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streamReader.Close();
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streamReader.Dispose();
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fileStream.Close();
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fileStream.Dispose();
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fileStream=new FileStream(strPathFileName,FileMode.Append);
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streamWriter=new StreamWriter(fileStream);
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}
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return true;
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}
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catch(Exception exception)
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{
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Console.WriteLine(String.Format("Exception:{0}",exception));
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return false;
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}
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}
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private bool IsExpired(String strPathFileName)
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{
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try
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{
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DateGenerator dateGenerator=new DateGenerator();
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DateTime creationTime=File.GetCreationTime(strPathFileName);
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int daysElapsed=Math.Abs(dateGenerator.DaysBetweenActual(creationTime,DateTime.Now));
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if(daysElapsed>5)
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{
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Console.WriteLine(String.Format("{0} is expired. {1} days old.",strPathFileName,daysElapsed));
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return true;
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}
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return false;
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}
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catch(Exception exception)
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{
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Console.WriteLine(String.Format("Exception:{0}",exception));
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return true;
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}
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}
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public List<String> Entries
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{
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get{return new List<String>(entries.Keys);}
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}
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public void Add(String entry)
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{
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if(null==streamWriter)return;
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streamWriter.WriteLine(entry);
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streamWriter.Flush();
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}
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public void Dispose()
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{
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if(null!=streamWriter){streamWriter.Close();streamWriter.Dispose();}
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if(null!=fileStream){fileStream.Close();fileStream.Dispose();}
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}
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}
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}
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