static void Main(string[] args)
{
// Create chunk directory
if (!Directory.Exists("chunks"))
{
Directory.CreateDirectory("chunks");
}
// Define settings, callbacks, and initialize
DedupeSettings settings = new DedupeSettings(32768, 262144, 2048, 2);
DedupeCallbacks callbacks = new DedupeCallbacks(WriteChunk, ReadChunk, DeleteChunk);
DedupeLibrary dedupe = new DedupeLibrary("test.db", settings, callbacks);
// Store objects in the index
dedupe.Write("kjv1", File.ReadAllBytes("samplefiles/kjv.txt"));
dedupe.Write("kjv2", File.ReadAllBytes("samplefiles/kjv.txt"));
dedupe.Write("kjv3", File.ReadAllBytes("samplefiles/kjv.txt"));
// Check existence and retrieve an object from the index
if (dedupe.Exists("kjv2"))
{
Console.WriteLine("Exists");
}
DedupeObject obj = dedupe.Get("kjv1");
// List all objects
Console.WriteLine(dedupe.ListObjects().ToTabularString());
// Display index statistics
Console.WriteLine(dedupe.IndexStats().ToString());
// Delete an object from the index
dedupe.Delete("kjv1");
}
/// <summary>
/// Retrieve metadata for a given object.
/// DedupeObjectMap objects returned should be ordered in ascending order based on the chunk's position or address.
/// </summary>
/// <param name="key">Object key.</param>
/// <returns>Object metadata.</returns>
public override DedupeObject GetObjectMetadata(string key)
{
if (String.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
key = DedupeCommon.SanitizeString(key);
DbExpression e = new DbExpression(
_ORM.GetColumnName <DedupeObject>(nameof(DedupeObject.Key)),
DbOperators.Equals,
key);
DedupeObject ret = _ORM.SelectFirst <DedupeObject>(e);
if (ret != null)
{
ret.Chunks = GetChunks(key);
ret.ObjectMap = GetObjectMap(key);
if (ret.ObjectMap != null && ret.ObjectMap.Count > 0)
{
ret.ObjectMap = ret.ObjectMap.OrderBy(o => o.ChunkAddress).ToList();
}
}
return(ret);
}
/// <summary>
/// Add a new object to the index.
/// </summary>
/// <param name="key">Object key.</param>
/// <param name="length">The total length of the object.</param>
public override void AddObject(string key, long length)
{
if (String.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
if (length < 1)
{
throw new ArgumentException("Length must be greater than zero.");
}
key = DedupeCommon.SanitizeString(key);
if (Exists(key))
{
throw new ArgumentException("An object with key '" + key + "' already exists.");
}
DedupeObject obj = _ORM.Insert <DedupeObject>(new DedupeObject(key, length));
}
/// <summary>
/// Retrieve the object map containing the metadata for a given address within the original object.
/// </summary>
/// <param name="key">Object key.</param>
/// <param name="position">Starting byte position.</param>
/// <returns>Dedupe object map.</returns>
public override DedupeObjectMap GetObjectMapForPosition(string key, long position)
{
if (String.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
if (position < 0)
{
throw new ArgumentOutOfRangeException("Start of range must be zero or greater.");
}
key = DedupeCommon.SanitizeString(key);
DedupeObject obj = GetObjectMetadata(key);
if (obj == null)
{
return(null);
}
string objMapTable = _ORM.GetTableName(typeof(DedupeObjectMap));
string objKeyCol = _ORM.GetColumnName <DedupeObjectMap>(nameof(DedupeObjectMap.ObjectKey));
string chunkAddrCol = _ORM.GetColumnName <DedupeObjectMap>(nameof(DedupeObjectMap.ChunkAddress));
string chunkLenCol = _ORM.GetColumnName <DedupeObjectMap>(nameof(DedupeObjectMap.ChunkLength));
string query =
"SELECT * FROM " + objMapTable + " " +
"WHERE " +
" " + objKeyCol + " = '" + obj.Key + "' " +
" AND " + chunkAddrCol + " <= " + position + " AND " + chunkAddrCol + " + " + chunkLenCol + " > " + position + " ";
DedupeObjectMap map = null;
DataTable result = _ORM.Query(query);
if (result != null && result.Rows.Count > 0)
{
map = _ORM.DataRowToObject <DedupeObjectMap>(result.Rows[0]);
}
return(map);
}
/// <summary>
/// Delete an object and dereference the associated chunks.
/// </summary>
/// <param name="key">Object key.</param>
/// <returns>List of chunk keys that should be garbage collected.</returns>
public override List <string> Delete(string key)
{
if (String.IsNullOrEmpty(key))
{
throw new ArgumentNullException(nameof(key));
}
List <string> ret = new List <string>();
key = DedupeCommon.SanitizeString(key);
DedupeObject obj = GetObjectMetadata(key);
if (obj == null)
{
throw new KeyNotFoundException("Key '" + key + "' not found.");
}
List <DedupeObjectMap> maps = GetObjectMap(key);
if (maps != null && maps.Count > 0)
{
foreach (DedupeObjectMap map in maps)
{
if (DecrementChunkRefcount(map.ChunkKey))
{
ret.Add(map.ChunkKey);
}
}
}
DbExpression e = new DbExpression(
_ORM.GetColumnName <DedupeObjectMap>(nameof(DedupeObjectMap.ObjectKey)),
DbOperators.Equals,
key);
_ORM.DeleteMany <DedupeObjectMap>(e);
// chunks to GC
return(ret);
}
static void Main(string[] args)
{
bool runForever = true;
string filename = "";
string key = "";
List <Chunk> chunks = new List <Chunk>();
DedupeObject obj = null;
Initialize();
while (runForever)
{
Console.Write("Command [? for help] > ");
string userInput = Console.ReadLine();
if (String.IsNullOrEmpty(userInput))
{
continue;
}
switch (userInput)
{
case "?":
Console.WriteLine("Available commands:");
Console.WriteLine(" q quit");
Console.WriteLine(" cls clear the screen");
Console.WriteLine(" write store an object");
Console.WriteLine(" get retrieve an object");
Console.WriteLine(" del delete an object");
Console.WriteLine(" md retrieve object metadata");
Console.WriteLine(" list list 100 objects in the index");
Console.WriteLine(" listp paginated list objects");
Console.WriteLine(" exists check if object exists in the index");
Console.WriteLine(" stats list index stats");
Console.WriteLine("");
break;
case "q":
case "Q":
runForever = false;
break;
case "cls":
Console.Clear();
break;
case "write":
filename = InputString("Input filename:", null, false);
key = InputString("Object key:", null, false);
long contentLength = GetContentLength(filename);
using (FileStream fs = new FileStream(filename, FileMode.Open))
{
_Dedupe.Write(key, contentLength, fs);
}
break;
case "get":
key = InputString("Object key:", null, false);
filename = InputString("Output filename:", null, false);
obj = _Dedupe.Get(key);
if (obj != null)
{
if (obj.Length > 0)
{
using (FileStream fs = new FileStream(filename, FileMode.OpenOrCreate))
{
int bytesRead = 0;
long bytesRemaining = obj.Length;
byte[] readBuffer = new byte[65536];
while (bytesRemaining > 0)
{
bytesRead = obj.DataStream.Read(readBuffer, 0, readBuffer.Length);
if (bytesRead > 0)
{
fs.Write(readBuffer, 0, bytesRead);
bytesRemaining -= bytesRead;
}
}
}
Console.WriteLine("Success");
}
else
{
Console.WriteLine("Success, (no data)");
}
}
else
{
Console.WriteLine("Failed");
}
break;
case "del":
key = InputString("Object key:", null, false);
_Dedupe.Delete(key);
break;
case "md":
key = InputString("Object key:", null, false);
obj = _Dedupe.GetMetadata(key);
if (obj != null)
{
Console.WriteLine("Success");
Console.WriteLine(obj.ToString());
}
else
{
Console.WriteLine("Failed");
}
break;
case "list":
_EnumResult = _Dedupe.ListObjects();
if (_EnumResult == null)
{
Console.WriteLine("No objects");
}
else
{
Console.WriteLine(_EnumResult.ToTabularString());
}
break;
case "exists":
key = InputString("Object key:", null, false);
if (_Dedupe.Exists(key))
{
Console.WriteLine("Object exists");
}
else
{
Console.WriteLine("Object does not exist");
}
break;
case "stats":
_Stats = _Dedupe.IndexStats();
if (_Stats != null)
{
Console.WriteLine("Statistics:");
Console.WriteLine(" Number of objects : " + _Stats.Objects);
Console.WriteLine(" Number of chunks : " + _Stats.Chunks);
Console.WriteLine(" Logical bytes : " + _Stats.LogicalBytes + " bytes");
Console.WriteLine(" Physical bytes : " + _Stats.PhysicalBytes + " bytes");
Console.WriteLine(" Dedupe ratio : " + DecimalToString(_Stats.RatioX) + "X, " + DecimalToString(_Stats.RatioPercent) + "%");
Console.WriteLine("");
}
else
{
Console.WriteLine("Failed");
}
break;
default:
break;
}
}
}
static void Main(string[] args)
{
try
{
#region Parse-Arguments
if (args == null || args.Length < 2)
{
Usage("No arguments specified");
return;
}
_IndexFile = args[0];
_Command = args[1];
for (int i = 2; i < args.Length; i++)
{
if (String.IsNullOrEmpty(args[i]))
{
continue;
}
if (args[i].StartsWith("--chunks=") && args[i].Length > 9)
{
_ChunkDir = args[i].Substring(9);
if (!_ChunkDir.EndsWith("\\"))
{
_ChunkDir += "\\";
}
if (!Directory.Exists(_ChunkDir))
{
Directory.CreateDirectory(_ChunkDir);
}
}
else if (args[i].StartsWith("--key=") && args[i].Length > 6)
{
_Key = args[i].Substring(6);
}
else if (args[i].StartsWith("--idxstart=") && args[i].Length > 11)
{
if (!Int32.TryParse(args[i].Substring(11), out _IndexStart))
{
Usage("Index start must be an integer value.");
return;
}
else
{
if (_IndexStart < 0)
{
Usage("Index start must be greater than zero.");
return;
}
}
}
else if (args[i].StartsWith("--results=") && args[i].Length > 10)
{
if (!Int32.TryParse(args[i].Substring(10), out _MaxResults))
{
Usage("Max results must be an integer value.");
return;
}
else
{
if (_MaxResults < 1 || _MaxResults > 100)
{
Usage("Max results must be greater than zero and less than or equal to 100.");
return;
}
}
}
else if (args[i].StartsWith("--params=") && args[i].Length > 9)
{
_CreateParams = args[i].Substring(9);
if (new Regex(@"^\d+,\d+,\d+,\d+$").IsMatch(_CreateParams))
{
string[] currParams = _CreateParams.Split(',');
if (currParams.Length != 4)
{
Usage("Value for 'params' is invalid");
return;
}
if (!Int32.TryParse(currParams[0], out _MinChunkSize) ||
!Int32.TryParse(currParams[1], out _MaxChunkSize) ||
!Int32.TryParse(currParams[2], out _ShiftCount) ||
!Int32.TryParse(currParams[3], out _BoundaryCheckBytes)
)
{
Usage("Value for 'params' is not of the form int,int,int,int");
return;
}
}
else
{
Usage("Value for 'params' is not of the form int,int,int,int");
return;
}
}
else
{
Usage("Unknown argument: " + args[i]);
return;
}
}
#endregion
#region Verify-Values
List <string> validCommands = new List <string>()
{
"create", "stats", "write", "get", "del", "list", "exists", "md"
};
if (!validCommands.Contains(_Command))
{
Usage("Invalid command: " + _Command);
return;
}
#endregion
#region Create
if (String.Compare(_Command, "create") == 0)
{
_Settings = new DedupeSettings(_MinChunkSize, _MaxChunkSize, _ShiftCount, _BoundaryCheckBytes);
_Callbacks = new DedupeCallbacks(WriteChunk, ReadChunk, DeleteChunk);
_Dedupe = new DedupeLibrary(_IndexFile, _Settings, _Callbacks);
return;
}
#endregion
#region Initialize-Index
if (!File.Exists(_IndexFile))
{
Console.WriteLine("*** Index file " + _IndexFile + " not found");
}
_Settings = new DedupeSettings();
_Callbacks = new DedupeCallbacks(WriteChunk, ReadChunk, DeleteChunk);
_Dedupe = new DedupeLibrary(_IndexFile, _Settings, _Callbacks);
#endregion
#region Process-by-Command
switch (_Command)
{
case "stats":
_Stats = _Dedupe.IndexStats();
if (_Stats != null)
{
Console.WriteLine("Statistics:");
Console.WriteLine(" Number of objects : " + _Stats.Objects);
Console.WriteLine(" Number of chunks : " + _Stats.Chunks);
Console.WriteLine(" Logical bytes : " + _Stats.LogicalBytes + " bytes");
Console.WriteLine(" Physical bytes : " + _Stats.PhysicalBytes + " bytes");
Console.WriteLine(" Dedupe ratio : " + DecimalToString(_Stats.RatioX) + "X, " + DecimalToString(_Stats.RatioPercent) + "%");
return;
}
else
{
Console.WriteLine("Failed");
}
return;
case "get":
if (String.IsNullOrEmpty(_Key))
{
Usage("Object key must be supplied");
}
else
{
_Object = _Dedupe.Get(_Key);
if (_Object == null)
{
Console.WriteLine("Failed");
}
else
{
WriteConsoleData(_Object.Data);
}
}
return;
case "write":
if (String.IsNullOrEmpty(_Key))
{
Usage("Object key must be supplied");
}
else
{
if (_Dedupe.Exists(_Key))
{
Console.WriteLine("Already exists");
}
else
{
ReadConsoleData();
_Dedupe.Write(_Key, _Request);
}
}
return;
case "del":
if (String.IsNullOrEmpty(_Key))
{
Usage("Object key must be supplied");
}
else
{
_Dedupe.Delete(_Key);
}
return;
case "md":
if (String.IsNullOrEmpty(_Key))
{
Usage("Object key must be supplied");
}
else
{
_Object = _Dedupe.GetMetadata(_Key);
if (_Object == null)
{
Console.WriteLine("Failed");
}
else
{
Console.WriteLine(_Object.ToString());
}
}
return;
case "list":
_EnumResult = _Dedupe.ListObjects(_Key, _IndexStart, _MaxResults);
if (_EnumResult == null)
{
Console.WriteLine("No objects");
}
else
{
Console.WriteLine(_EnumResult.ToTabularString());
}
return;
case "exists":
if (String.IsNullOrEmpty(_Key))
{
Usage("Object key must be supplied");
return;
}
else
{
Console.WriteLine(_Dedupe.Exists(_Key));
}
return;
default:
Usage("Unknown command: " + _Command);
return;
}
#endregion
}
catch (Exception e)
{
ExceptionConsole("Dedupe", "Outer exception", e);
}
}
