/// <summary>Serialize the actual read result on the wire.</summary>
/// <exception cref="System.IO.IOException"/>
internal static void WriteReadResult(OutputStream @out, DataTransferProtos.Status
statusCode)
{
((DataTransferProtos.ClientReadStatusProto)DataTransferProtos.ClientReadStatusProto
.NewBuilder().SetStatus(statusCode).Build()).WriteDelimitedTo(@out);
@out.Flush();
}
public static int CombineHeader(PipelineAck.ECN ecn, DataTransferProtos.Status status
)
{
int header = 0;
header = PipelineAck.StatusFormat.SetStatus(header, status);
header = PipelineAck.StatusFormat.SetECN(header, ecn);
return(header);
}
/// <summary>Get the timeout to be used for transmitting the OOB type</summary>
/// <returns>the timeout in milliseconds</returns>
/// <exception cref="System.IO.IOException"/>
public static long GetOOBTimeout(DataTransferProtos.Status status)
{
int index = status.GetNumber() - OobStart;
if (index >= 0 && index < NumOobTypes)
{
return(OobTimeout[index]);
}
// Not an OOB.
throw new IOException("Not an OOB status: " + status);
}
/// <exception cref="System.IO.IOException"/>
private void SendResponse(DataTransferProtos.Status status, string firstBadLink,
string message, DataOutputStream @out)
{
DataTransferProtos.BlockOpResponseProto.Builder builder = DataTransferProtos.BlockOpResponseProto
.NewBuilder().SetStatus(status);
if (firstBadLink != null)
{
builder.SetFirstBadLink(firstBadLink);
}
if (message != null)
{
builder.SetMessage(message);
}
((DataTransferProtos.BlockOpResponseProto)builder.Build()).WriteDelimitedTo(@out);
}
// in will be closed when its Socket is closed.
/// <summary>
/// When the reader reaches end of the read, it sends a status response
/// (e.g.
/// </summary>
/// <remarks>
/// When the reader reaches end of the read, it sends a status response
/// (e.g. CHECKSUM_OK) to the DN. Failure to do so could lead to the DN
/// closing our connection (which we will re-open), but won't affect
/// data correctness.
/// </remarks>
internal virtual void SendReadResult(DataTransferProtos.Status statusCode)
{
System.Diagnostics.Debug.Assert(!sentStatusCode, "already sent status code to " +
peer);
try
{
WriteReadResult(peer.GetOutputStream(), statusCode);
sentStatusCode = true;
}
catch (IOException e)
{
// It's ok not to be able to send this. But something is probably wrong.
Log.Info("Could not send read status (" + statusCode + ") to datanode " + peer.GetRemoteAddressString
() + ": " + e.Message);
}
}
public static int SetStatus(int old, DataTransferProtos.Status status)
{
return((int)PipelineAck.StatusFormat.Status.Bits.Combine(status.GetNumber(), old));
}
public static int SetStatusForHeader(int old, DataTransferProtos.Status status)
{
return(PipelineAck.StatusFormat.SetStatus(old, status));
}
/// <summary>return true if it is the restart OOB status code</summary>
public static bool IsRestartOOBStatus(DataTransferProtos.Status st)
{
return(st.Equals(DataTransferProtos.Status.OobRestart));
}
