| private OpenLargeObjectChannel ( ObjectId objId ) : ILargeObjectChannel | ||
| objId | ObjectId | |
| Результат | ILargeObjectChannel | |
internal DeveelDbLob(DeveelDbConnection connection, ObjectId objId, long size)
: this(objId, size, FileAccess.Read)
{
this.connection = connection;
lobChannel = connection.OpenLargeObjectChannel(objId);
readStream = new BufferedStream(new LobInputStream(this), (int)(size / 64));
}
internal DeveelDbLob(DeveelDbConnection connection, ObjectId objId, long size)
: this(objId, size, FileAccess.Read)
{
this.connection = connection;
lobChannel = connection.OpenLargeObjectChannel(objId);
readStream = new BufferedStream(new LobInputStream(this), (int)(size/64));
}
internal static ObjectId Upload(DeveelDbConnection connection, DeveelDbLob lob)
{
if (connection == null)
{
throw new InvalidOperationException("An open connection is required to upload the LOB");
}
var objId = connection.CreateLargeObject(lob.Length);
using (var channel = connection.OpenLargeObjectChannel(objId)) {
const int bufferSize = 2048;
var copyBuffer = new byte[bufferSize];
int readCount;
long copyOffset = 0;
lob.writeStream.Seek(0, SeekOrigin.Begin);
while ((readCount = lob.writeStream.Read(copyBuffer, 0, bufferSize)) > 0)
{
channel.PushData(copyOffset, copyBuffer, readCount);
copyOffset += readCount;
}
}
return(objId);
}
internal static ObjectId Upload(DeveelDbConnection connection, DeveelDbLob lob)
{
if (connection == null)
throw new InvalidOperationException("An open connection is required to upload the LOB");
var objId = connection.CreateLargeObject(lob.Length);
using (var channel = connection.OpenLargeObjectChannel(objId)) {
const int bufferSize = 2048;
var copyBuffer = new byte[bufferSize];
int readCount;
long copyOffset = 0;
lob.writeStream.Seek(0, SeekOrigin.Begin);
while ((readCount = lob.writeStream.Read(copyBuffer, 0, bufferSize)) > 0) {
channel.PushData(copyOffset, copyBuffer, readCount);
copyOffset += readCount;
}
}
return objId;
}