public void TestReadFrom3Chunks()
{
string filename = "read3chunks.txt";
int chunks = 3;
int chunkSize = 256 * 1024;
int size = (256 * 1024 * chunks) - 5000;
Object id = CreateDummyFile(filename, size, chunkSize, 0);
using (GridFileStream gfs = fs.OpenRead(filename)){
int buffsize = 10240;
Byte[] buff = new Byte[buffsize];
int read = 0;
int totalRead = 0;
while ((read = gfs.Read(buff, 0, buffsize)) != 0)
{
totalRead += read;
}
Assert.AreEqual(size, totalRead, "Not all bytes read back");
}
}
public void TestRead()
{
string filename = "readme.txt";
GridFileStream gfs = fs.Create(filename);
for (int i = 1; i <= 50; i++)
{
gfs.Write(BitConverter.GetBytes(i), 0, 4);
}
gfs.Close();
gfs = fs.OpenRead(filename);
Byte[] buff = new Byte[4];
int read;
for (int i = 1; i <= 50; i++)
{
read = gfs.Read(buff, 0, 4);
Assert.AreEqual(4, read, "Not enough bytes were read");
Assert.AreEqual(i, BitConverter.ToInt32(buff, 0), "value read back was not the same as written");
}
}
public void TestWriteWithMultipleFlushes()
{
string filename = "multiflush.txt";
GridFileStream gfs = fs.Create(filename);
Object id = gfs.GridFileInfo.Id;
int size = gfs.GridFileInfo.ChunkSize * 2;
byte[] buff;
int x = 0;
for (int i = 0; i < size; i += 4)
{
buff = BitConverter.GetBytes(x);
gfs.Write(buff, 0, buff.Length);
x++;
if (i % size / 4 == 0)
{
gfs.Flush();
}
}
gfs.Close();
gfs = fs.OpenRead(filename);
int read;
int val;
buff = new byte[4];
for (int i = 0; i < size / 4; i++)
{
read = gfs.Read(buff, 0, 4);
val = BitConverter.ToInt32(buff, 0);
Assert.AreEqual(4, read, "Not enough bytes were read. Pos: " + gfs.Position);
Assert.AreEqual(i, val, "value read back was not the same as written. Pos: " + gfs.Position);
}
}
public GridFileStream Open(FileMode mode, FileAccess access)
{
switch (mode) {
case FileMode.Create:
if(gridFile.Exists(this.FileName) == true){
return this.Open(FileMode.Truncate, access);
}else{
return this.Create(FileMode.CreateNew, access);
}
case FileMode.CreateNew:
return this.Create(mode, access);
case FileMode.Open:
LoadFileData();
return new GridFileStream(this,this.gridFile.Files, this.gridFile.Chunks, access);
case FileMode.OpenOrCreate:
if(gridFile.Exists(this.FileName) == false) return this.Create(mode, access);
LoadFileData();
return new GridFileStream(this, this.gridFile.Files, this.gridFile.Chunks, access);
case FileMode.Truncate:
this.Truncate();
return new GridFileStream(this,this.gridFile.Files, this.gridFile.Chunks, access);
case FileMode.Append:
LoadFileData();
GridFileStream gfs = new GridFileStream(this,this.gridFile.Files, this.gridFile.Chunks, access);
gfs.Seek(0,SeekOrigin.End);
return gfs;
}
throw new NotImplementedException("Mode not implemented.");
}
