/// <summary>
/// Send a request for acknoledgement of job error
/// </summary>
/// <param name="config">The extraction routine's configuration</param>
/// <param name="error">Any error message to be passed</param>
/// <returns>True if acknoledged, false otherwise</returns>
public bool sendJobErrorRequest(ExtractorConfiguration config, ExtractorReport report)
{
//LOG.Debug("Sending the orchestrator a job error request");
MessageTO message = new MessageTO()
{
Message = "Job Error!",
//Extractor = new Extractor(extractor.HostName, extractor.ListeningPort,
// extractor.SiteCode, extractor.VistaFile, extractor.Timestamp),
Configuration = config,
ExtractorReport = report,
//Error = report.ToString(),
//HostName = extractor.HostName,
//ListeningPort = extractor.ListeningPort,
MessageType = MessageTypeTO.JobErrorRequest
};
MessageTO response = submitRequest(message);
if (response == null || response.MessageType != MessageTypeTO.JobErrorResponse)
{
////LOG.Debug("The orchestrator did not successfully acknowledge our job error request!");
return(false);
}
else
{
//LOG.Debug("The orchestrator successfully acknowledged our job error response! Better luck next time...");
return(true);
}
}
/// <summary>
/// Send a request to the server to ask if any more jobs are available on it's work stack
/// </summary>
/// <returns>Returns true if server has work items, false otherwise</returns>
public bool sendServerHasWorkRequest()
{
MessageTO message = new MessageTO();
message.MessageType = MessageTypeTO.ServerHasWorkRequest;
MessageTO response = submitRequest(message);
if (response != null)
{
//LOG.Debug("Received " + Enum.GetName(typeof(MessageTypeTO), response.MessageType) + " message type");
if (response.MessageType == MessageTypeTO.Error)
{
//LOG.Debug(response.Error);
}
//LOG.Debug("Server reported " + response.Message + " jobs");
}
int trash = 0;
// response should be server has work type, message should contain the number of items on the
// work stack, the message should be a number and the number should be > 0
if (response != null &&
response.MessageType == MessageTypeTO.ServerHasWorkResponse &&
!String.IsNullOrEmpty(response.Message) &&
Int32.TryParse(response.Message, out trash) &&
trash > 0)
{
return(true);
}
else
{
return(false);
}
}
void sendToClient(ThreadSafeStateObject state, MessageTO message)
{
BinaryFormatter serializer = new BinaryFormatter();
MemoryStream bytesToSend = new MemoryStream();
serializer.Serialize(bytesToSend, message);
//bytesToSend.WriteByte(EOT); // add EOT before setting stream position
bytesToSend.Position = 0;
NetworkStream stream = new NetworkStream(state.Socket);
byte[] header = System.Text.ASCIIEncoding.ASCII.GetBytes(String.Concat(bytesToSend.Length.ToString() + "|"));
stream.Write(header, 0, header.Length);
stream.Write(bytesToSend.GetBuffer(), 0, (Int32)bytesToSend.Length);
stream.Flush();
try
{
state.Socket.Shutdown(SocketShutdown.Both);
state.Socket.Close();
}
catch (Exception exc)
{
//LOG.Error("An exception was caught trying to shut down a background server socket", exc);
}
}
void sendToClient(ThreadSafeStateObject state, string message)
{
MessageTO messageObject = new MessageTO()
{
Message = message
};
sendToClient(state, messageObject);
}
/// <summary>
/// Submit a query to the connected socket
/// </summary>
/// <param name="request">The request string to submit</param>
/// <param name="disconnect">Will disconnect socket after query has completed if set to true</param>
/// <param name="echoRequest">Submits specially formatted request that Server class will simply send back untouched</param>
/// <returns>The response from the query</returns>
public string sendMessage(string message, bool disconnect, bool echoRequest)
{
MessageTO messageTO = query(new MessageTO()
{
Message = message
}, disconnect, echoRequest);
return(messageTO.Message);
}
public MessageTO sendPrioritizationRequest(IList <ExtractorConfiguration> configs)
{
MessageTO request = new MessageTO();
request.MessageType = MessageTypeTO.JobPrioritizationRequest;
request.Configurations = new Dictionary <string, IList <ExtractorConfiguration> >();
request.Configurations.Add("PRIORITIZE", configs);
return(submitRequest(request));
}
public MessageTO sendLogErrorRequest(string errorMessage)
{
//LOG.Debug("Sending a log error request to the orchestrator");
MessageTO message = new MessageTO()
{
Error = errorMessage,
MessageType = MessageTypeTO.LogErrorRequest
};
return(submitRequest(message));
}
public MessageTO submitRequest(MessageTO message)
{
try
{
return(query(message, true, false));
}
catch (Exception exc)
{
//LOG.Error("Unable to send message: " + message.ToString(), exc);
return(null);
}
}
/// <summary>
/// Send a request for the completion percentage of a client extractor
/// </summary>
/// <returns>A string representing the percentage complete of a client extractor</returns>
public string sendJobStatusRequest()
{
MessageTO request = new MessageTO();
request.MessageType = MessageTypeTO.JobStatusRequest;
MessageTO response = submitRequest(request);
if (response != null)
{
return(response.Message);
}
return("0");
}
public IList <Extractor> sendGetExtractorsRequest()
{
MessageTO request = new MessageTO();
request.MessageType = MessageTypeTO.ExtractorsRequest;
MessageTO response = submitRequest(request);
if (response == null || response.MessageType != MessageTypeTO.ExtractorsResponse)
{
return(null);
}
return(response.Extractors);
}
public bool sendCompressedFilesUploadRequest(Dictionary <string, byte[]> compressedFiles, ExtractorConfiguration config)
{
MessageTO message = new MessageTO
{
CompressedDataTables = compressedFiles,
MessageType = MessageTypeTO.TablesUploadRequest,
Configuration = config
};
MessageTO response = submitRequest(message);
if (response == null || response.MessageType != MessageTypeTO.TablesUploadResponse)
{
return(false);
}
return(true);
}
/// <summary>
/// Ask the orchestrator for a new extraction job
/// </summary>
/// <returns></returns>
public MessageTO sendNewJobRequest(string localHostName, Int32 listeningPort)
{
//LOG.Debug("Sending a new job request to the orchestrator");
MessageTO message = new MessageTO()
{
HostName = localHostName,
ListeningPort = listeningPort,
Message = "New Job",
MessageType = MessageTypeTO.NewJobRequest
};
message.Extractor = new Extractor(message.HostName, message.ListeningPort, "", "", new DateTime());
MessageTO response = submitRequest(message);
//LOG.Debug("Successfully received a new job response from the orchestrator!");
return(response);
}
/// <summary>
/// Send a request to either an extractor's or the orchestrator's server to stop the process
/// </summary>
/// <param name="reason">The reason for the request</param>
/// <returns>True if the request was acknoledged, false otherwise</returns>
public bool sendStopServerRequest(string reason)
{
if (String.IsNullOrEmpty(reason))
{
return(false);
}
MessageTO message = new MessageTO()
{
MessageType = MessageTypeTO.StopServerRequest,
Message = reason
};
MessageTO response = submitRequest(message);
if (response == null || response.MessageType != MessageTypeTO.StopServerResponse)
{
return(false);
}
return(true);
}
/// <summary>
/// Get a generic list of configurations from the orchestrator
/// </summary>
/// <returns></returns>
public String sendGetWorkListsRequest()
{
MessageTO request = new MessageTO()
{
MessageType = MessageTypeTO.WorkStacksRequest,
};
MessageTO response = submitRequest(request);
//if (response == null || response.Configurations == null)
//{
// return null;
//}
if (response == null || String.IsNullOrEmpty(response.Message))
{
return(null);
}
return(response.Message); // now contains JSON representation of TaggedExtractorConfigurationArrays
}
/// <summary>
/// Send a request to upload a DataTable of Vista data to the orchestrator service
/// </summary>
/// <param name="vistaData">The Vista data in a DataTable object</param>
/// <param name="config">The extractor's configuration</param>
/// <returns>Returns the file name created on the orchestrator server if successful. Returns null if there was an error</returns>
public string sendVistaDataUploadRequest(DataTable vistaData, ExtractorConfiguration config)
{
//LOG.Debug("Sending a request to upload our extraction results to the orchestrator");
MessageTO message = new MessageTO()
{
VistaData = vistaData,
MessageType = MessageTypeTO.TableUploadRequest,
Configuration = config
};
MessageTO response = submitRequest(message);
if (response.MessageType == MessageTypeTO.TableUploadResponse)
{
//LOG.Debug("Successfully uploaded our extraction results!");
return(response.Message);
}
else
{
//LOG.Debug("Uh-oh! Our upload seems to have failed...");
return(null);
}
}
public bool send7zipFileUploadRequest(string checksum, byte[] fileBytes)
{
// LOG.Debug("Sending a request to upload our zipped extraction results to the orchestrator");
MessageTO message = new MessageTO
{
Message = checksum,
ZippedFile = fileBytes,
MessageType = MessageTypeTO.ZipFileUploadRequest
};
MessageTO response = submitRequest(message);
if (response.MessageType == MessageTypeTO.ZipFileUploadResponse)
{
//LOG.Debug("Successfully uploaded our zip file!");
return(true);
}
else
{
//LOG.Debug("Uh-oh! Some unknown error occurred while uploading our zip file!");
return(false);
}
}
/// <summary>
/// Send a completed message
/// </summary>
/// <param name="config"></param>
public bool sendJobCompletedRequest(ExtractorConfiguration config, ExtractorReport report, String lastIen)
{
// LOG.Debug("Sending orchestrator a notice the job has beeen completed...");
MessageTO message = new MessageTO()
{
ExtractorReport = report,
Message = lastIen,
Configuration = config,
MessageType = MessageTypeTO.JobCompletedRequest
};
MessageTO response = submitRequest(message);
if (response == null || response.MessageType != MessageTypeTO.JobCompletedResponse)
{
//LOG.Debug("The orchestrator did not successfully acknowledge our job completed notice!");
return(false);
}
else
{
//LOG.Debug("The orchestrator got our job completed notice! We are such a good worker!");
return(true);
}
}
//void waitForData(StateObject state)
//{
// state.Socket.BeginReceive(state.Buffer, 0, StateObject.BufferSize, SocketFlags.None, new AsyncCallback(dataReceivedCallback), state);
//}
void dataReceivedCallback(IAsyncResult iar)
{
ThreadSafeStateObject state = (ThreadSafeStateObject)iar.AsyncState;
Socket worker = state.Socket;
try
{
int bytesRead = worker.EndReceive(iar);
if (bytesRead == 0 && state.getMemoryStreamLength() == 0)
{
worker.Close();
return;
}
// first get length header
int msgLength = 0;
for (int i = 0; i < bytesRead; i++)
{
if (state.Buffer[i] == '\x7c')
{
msgLength = Convert.ToInt32(System.Text.ASCIIEncoding.ASCII.GetString(state.Buffer.Take(i).ToArray()));
bytesRead = bytesRead - i - 1; // -1 for the pipe too
break;
}
}
state.Buffer = state.Buffer.Skip(msgLength.ToString().Length + 1).ToArray(); // now reset chunk to skip the header
state.addBytesToMemoryStream(state.Buffer, bytesRead);
state.Buffer = new byte[ThreadSafeStateObject.BufferSize];
while (state.getMemoryStreamLength() < msgLength) // while not EOT
{
bytesRead = worker.Receive(state.Buffer);
state.addBytesToMemoryStream(state.Buffer, bytesRead);
state.Buffer = new byte[ThreadSafeStateObject.BufferSize];
}
//state.IsEOT = false;
BinaryFormatter bf = new BinaryFormatter();
//state.BytesInMemory.Position = 0; // set position in stream to zero so deserialization succeeds
byte[] bytes = state.getMemoryStream();
Stream memStream = new MemoryStream(bytes);
memStream.Position = 0;
MessageTO messageTO = (MessageTO)(bf.Deserialize(memStream));
sendToClient(state, RequestHandler.getInstance().handleRequest(messageTO, this)); // pass this because some methods use the properties and requesthandler is a singleton and not unique among threads
// this is our hook for thread safety mentioned in RequestHandler
// before returning check to see if shutdown signal was set
if (messageTO.MessageType == MessageTypeTO.StopServerRequest) // this.ServiceState != null && this.ServiceState.Status == ServiceStatus.STOPPED)
{
if (state.ServiceState != null)
{
state.ServiceState.Status = ServiceStatus.STOPPED;
}
stopListener();
}
}
catch (Exception)
{
//LOG.Error("An unrecoverable error occurred while sending/receiving data", exc);
try
{
worker.Shutdown(SocketShutdown.Both);
worker.Close();
}
catch (Exception) { }
}
}
/// <summary>
/// Serialize the MessageTO and send it to the connected socket
/// </summary>
/// <param name="messageTO"></param>
/// <param name="disconnect"></param>
/// <param name="echoRequest"></param>
/// <returns>The MessageTO received as a response to the MessageTO sent</returns>
internal MessageTO query(MessageTO messageTO, bool disconnect, bool echoRequest)
{
try
{
if (_connection == null || !_connection.Connected)
{
connect(_serverIp.ToString(), _serverPort);
}
if (messageTO == null)
{
throw new ArgumentNullException("Must supply a message to send");
}
if (echoRequest)
{
messageTO.Message = "<ECHO>" + messageTO.Message + "</ECHO>";
}
NetworkStream writer = _connection.GetStream();
BinaryFormatter bf = new BinaryFormatter();
MemoryStream bytesToSend = new MemoryStream();
bf.Serialize(bytesToSend, messageTO);
//byte EOT = System.Text.Encoding.ASCII.GetBytes("\x04")[0];
//bytesToSend.WriteByte(EOT); // add EOT
String lengthHeader = String.Concat(bytesToSend.Length.ToString(), "|");
writer.Write(System.Text.ASCIIEncoding.ASCII.GetBytes(lengthHeader), 0, lengthHeader.Length); // write length and a pipe as header first
writer.Write(bytesToSend.GetBuffer(), 0, (Int32)bytesToSend.Length); // then write the rest
writer.Flush();
// sent message - now receive response
int responseBufferSize = 8192; // create a buffer the size of the expected read - never expect big messages from server so this should be ok
byte[] chunk = new byte[responseBufferSize];
NetworkStream reader = _connection.GetStream();
#if RELEASE
reader.ReadTimeout = 300000; // give client 5 minutes to send the data and receive a response
#endif
MemoryStream responseBytes = new MemoryStream();
int bytesRead = reader.Read(chunk, 0, responseBufferSize);
// first get length header
int msgLength = 0;
for (int i = 0; i < bytesRead; i++)
{
if (chunk[i] == '\x7c')
{
msgLength = Convert.ToInt32(System.Text.ASCIIEncoding.ASCII.GetString(chunk.Take(i).ToArray()));
bytesRead = bytesRead - i - 1; // -1 for the pipe too
break;
}
}
chunk = chunk.Skip(msgLength.ToString().Length + 1).ToArray(); // now reset chunk to skip the header
responseBytes.Write(chunk, 0, bytesRead);
while (responseBytes.Length < msgLength)
{
chunk = new byte[responseBufferSize];
bytesRead = reader.Read(chunk, 0, responseBufferSize);
responseBytes.Write(chunk, 0, bytesRead);
}
if (disconnect)
{
this.disconnect();
}
bf = new BinaryFormatter();
responseBytes.Position = 0; // reset memory stream position for deserialization
MessageTO responseTO = (MessageTO)bf.Deserialize(responseBytes);
return(responseTO);
}
catch (Exception exc)
{
return(new MessageTO
{
MessageType = MessageTypeTO.Error,
Error = exc.ToString()
});
}
}
