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feature: write file is now on a low priority thread.

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feature: add asynchronous read file methods and event
This commit is contained in:
Jason Alborough
2022-03-24 17:50:34 -04:00
parent 7e8d88c3af
commit 33c7038d99
1 changed files with 110 additions and 25 deletions
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135
essentials-framework/Essentials Core/PepperDashEssentialsBase/File/FileIO.cs
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@@ -5,6 +5,7 @@ using System.Text;
using Crestron.SimplSharp;
using Crestron.SimplSharp.CrestronIO;
using PepperDash.Core;
using Crestron.SimplSharpPro.CrestronThread;
namespace PepperDash.Essentials.Core
{
@@ -12,6 +13,8 @@ namespace PepperDash.Essentials.Core
{
static CCriticalSection fileLock = new CCriticalSection();
public delegate void GotFileEventHandler(object sender, FileEventArgs e);
public static event GotFileEventHandler GotFileEvent;
/// <summary>
/// Get the full file info from a path/filename, can include wildcards.
@@ -100,42 +103,118 @@ namespace PepperDash.Essentials.Core
}
}
public static void ReadDataFromFileASync(string fileName)
{
try
{
ReadDataFromFileASync(GetFile(fileName));
}
catch (Exception e)
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "Error: FileIO read failed: \r{0}", e);
}
}
public static void ReadDataFromFileASync(FileInfo file)
{
try
{
CrestronInvoke.BeginInvoke(o => _ReadDataFromFileASync(file));
}
catch (Exception e)
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "Error: FileIO read failed: \r{0}", e);
}
}
private static void _ReadDataFromFileASync(FileInfo file)
{
string data;
try
{
DirectoryInfo dirInfo = new DirectoryInfo(file.Name);
Debug.Console(2, "FileIO Getting Data {0}", file.FullName);
if (File.Exists(file.FullName))
{
using (StreamReader r = new StreamReader(file.FullName))
{
data = r.ReadToEnd();
}
}
else
{
Debug.Console(2, "File {0} Does not exsist", file.FullName);
data = "";
}
GotFileEvent.Invoke(null, new FileEventArgs(data));
}
catch (Exception e)
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "Error: FileIO read failed: \r{0}", e);
data = "";
}
}
/// <summary>
///
/// </summary>
/// <param name="data"></param>
/// <param name="filePath"></param>
/// <summary>
///
/// </summary>
/// <param name="data"></param>
/// <param name="filePath"></param>
public static void WriteDataToFile(string data, string filePath)
{
Thread _WriteFileThread;
_WriteFileThread = new Thread((O) => _WriteFileMethod(data, filePath), null, Thread.eThreadStartOptions.CreateSuspended);
_WriteFileThread.Priority = Thread.eThreadPriority.LowestPriority;
_WriteFileThread.Start();
Debug.Console(0, Debug.ErrorLogLevel.Notice, "New WriteFile Thread");
}
static object _WriteFileMethod(string data, string filePath)
{
Debug.Console(0, Debug.ErrorLogLevel.Notice, "Attempting to write file: '{0}'", filePath);
try
{
if (fileLock.TryEnter())
{
using (StreamWriter sw = new StreamWriter(filePath))
{
sw.Write(data);
sw.Flush();
}
}
else
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "FileIO Unable to enter FileLock");
}
try
{
if (fileLock.TryEnter())
{
using (StreamWriter sw = new StreamWriter(filePath))
{
sw.Write(data);
sw.Flush();
}
}
catch (Exception e)
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "Error: FileIO write failed: \r{0}", e);
}
finally
{
if (fileLock != null && !fileLock.Disposed)
fileLock.Leave();
}
else
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "FileIO Unable to enter FileLock");
}
}
catch (Exception e)
{
Debug.Console(0, Debug.ErrorLogLevel.Error, "Error: FileIO write failed: \r{0}", e);
}
finally
{
if (fileLock != null && !fileLock.Disposed)
fileLock.Leave();
}
return null;
}
}
/// <summary>
@@ -163,4 +242,10 @@ namespace PepperDash.Essentials.Core
}
}
public class FileEventArgs
{
public FileEventArgs(string data) { Data = data; }
public string Data { get; private set; } // readonly
}
}