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TBVclient.m
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TBVclient.m
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% TBVclient - class with methods to communicate with TBV network plugin
% The communication is performed based on java.net.Socket and
% java.nio packages
%
%
% Usage:
% >> obj = TBVclient (host, port) % open connection
%
% properties:
%
%
% Author(s): Bruno Direito <[email protected]>,
% João Lima <[email protected]>,
% Marco Simões <[email protected]>,
% Alexandre Sayal <[email protected]>
%
% Created: IBILI, 2014/05/12
%
% Revision 1.0 2015/11/24
%
classdef TBVclient < handle
properties (SetAccess = private)
host
port
rSocket
rInputReqStream
rOutputReqStream
eSocket
eInputReqStream
eOutputReqStream
inChann
buffer
array
end
methods
function obj = TBVclient(host, port) % constructor
obj.host = host;
obj.port = port;
end
function createConnection(obj)
import java.net.Socket
import java.io.*
import java.nio.*
%--------------------------
% OPEN Request Socket
%--------------------------
obj.rSocket = Socket(obj.host, obj.port);
%timeout after 1 second
obj.rSocket.setSoTimeout(2000);
% input and output stream from the socket
obj.rOutputReqStream = DataOutputStream( obj.rSocket.getOutputStream);
obj.rInputReqStream = DataInputStream( obj.rSocket.getInputStream);
obj.inChann = java.nio.channels.Channels.newChannel(obj.rInputReqStream);
%obj.inChann.ConfigureBlocking(false);
BUFFER_SIZE = 1024*1024*2; % 2MB
% create buffer to put read data into
obj.array = zeros(1,BUFFER_SIZE,'int8');
obj.buffer = java.nio.ByteBuffer.wrap(obj.array);
%[~, message] = get_message (obj.rInputReqStream);
% SEND Request --- Connect to Request Socket
rOK = obj.sendRequest('Request Socket');
[rOK, message] = obj.getMessage();
fprintf(1, ' --- request socket open: %i\n\n', rOK);
% %--------------------------
% % OPEN Execute Socket
% %--------------------------
% obj.eSocket = Socket(obj.host, obj.port);
%
% obj.eOutputReqStream = DataOutputStream(obj.eSocket.getOutputStream);
%
% obj.eInputReqStream = DataInputStream(obj.eSocket.getInputStream);
%
% pause(.5);
%
% % SEND Request --- Connect to Request Socket
% eOK = send_request (obj.eOutputReqStream, 'Execute Socket');
% %[eOK, message] = get_message (obj.eOutputReqStream);
%
% fprintf(1, ' --- execute socket open: %i\n\n', eOK);
%
% NFLogger.getLogger().log('TBV Connection opened (Request Socket)');
end
function closeConnection(obj)
obj.rSocket.close;
NFLogger.getLogger().log('TBV Connection closed');
%obj.eSocket.close;
end
function [rOK, aOK, message] = query (obj, request, outputs)
import java.net.Socket
import java.io.*
aOK = 0;
if nargin<3
outputs = [];
end
NFLogger.getLogger().log(['TBV query: ' request]);
try
% Send request
rOK = obj.sendRequest(request, outputs);
catch error
error
rOK = 0;
aOK = 0;
message = [];
end
try
% if request rOK - Wait for answer from server
if rOK
[aOK, message] = obj.getMessage();
else
fprintf(1, ' --- request %s WAS NOT sent.\n', request);
end
catch error
error
rOK = 1;
aOK = 0;
message = [];
end
end
function [rOK, aOK, message] = queryVolumeData (obj, request, outputs)
import java.net.Socket
import java.io.*
aOK = 0;
if nargin<3
outputs = [];
end
NFLogger.getLogger().log(['TBV query: ' request]);
try
% Send request
rOK = obj.sendRequest(request, outputs);
catch error
error
rOK = 0;
aOK = 0;
message = [];
end
try
% if request rOK - Wait for answer from server
if rOK
[aOK, message] = obj.getVolumeDataMessage(request);
else
fprintf(1, ' --- request %s WAS NOT sent.\n', request);
end
catch error
error
rOK = 1;
aOK = 0;
message = [];
end
end
function [ok] = sendRequest(obj, request, output)
import java.net.Socket
import java.io.*
if nargin < 3
output = [];
end
ok = 1;
try
% create message with request
% char to byte
request = uint8(request);
request(end+1) = 0;
% length of the request (4 bytes)
requestLength = numToByte( length(request), 4 );
% add request parameters
outputVar = [];
for i = 1 : numel(output)
outputVar = [outputVar numToByte(output{i}, 4)];
end
%length of the message
messageSize = numToByte( ...
length(request) ...
+ length(requestLength) ...
+ length(outputVar) ...
, 8);
% complete message to send @ TBVserver
toSend = [messageSize requestLength request outputVar];
% Send Message using dataOutputStream
obj.rOutputReqStream.write(toSend, 0, length(toSend));
obj.rOutputReqStream.flush();
NFLogger.getLogger().log(['TBV Request sent: ' toSend]);
catch err
err
ok = 0;
end
end
function [requestOk, response] = getMessage(obj)
import java.net.Socket
import java.io.*
HEADER_MSG_SIZE = 8;
requestOk = 1;
response = [];
counter = 0;
msgSize = [];
message = uint8([]);
pause(.01);
try
% read message size
while 1
bytesAvailable = obj.rInputReqStream.available;
if bytesAvailable > HEADER_MSG_SIZE
break
end
pause(.1);
disp('waiting...')
% breaks if too much time passed
counter = counter + 1;
if counter > 5
requestOk = 0;
return
end
end
for i=1:HEADER_MSG_SIZE
msgSize(i) = typecast(int8(obj.rInputReqStream.readByte()), 'uint8');
end
msgSize = byteToNum(msgSize);
% fprintf(1, '\n - message size - %d\n',msgSize);
% read message size
while 1
bytesAvailable = obj.rInputReqStream.available;
if bytesAvailable >= msgSize
break
end
pause(.1);
disp('waiting...')
% breaks if too much time passed
counter = counter + 1;
if counter > 5
requestOk = 0;
return
end
end
for i=1:msgSize
message(i) = typecast(int8(obj.rInputReqStream.readByte()), 'uint8');
end
% fprintf(1, '\n - message received - %s\n',message);
% the response is returned as uint8
[requestSize, request, response] = obj.decodeMessage(message);
NFLogger.getLogger().log(['TBV Response received: ' response]);
catch error
error.message
requestOk = 0;
end
end
function [requestOk, response] = getVolumeDataMessage(obj, request)
import java.net.Socket
import java.io.*
HEADER_MSG_SIZE = 8;
requestOk = 1;
response = [];
counter = 0;
msgSize = [];
message = uint8([]);
pause(.01);
try
% read message size
while 1
bytesAvailable = obj.rInputReqStream.available;
if bytesAvailable > HEADER_MSG_SIZE
break
end
pause(.1);
disp('waiting...')
% breaks if too much time passed
counter = counter + 1;
if counter > 5
requestOk = 0;
return
end
end
for i=1:HEADER_MSG_SIZE
msgSize(i) = typecast(int8(obj.rInputReqStream.readByte()), 'uint8');
end
%fprintf(1, '\n - message size - %s\n',msgSize);
msgSize = byteToNum(msgSize);
fprintf(1, '\n - message size - %d\n',msgSize);
% % read message size
% while 1
%
% bytesAvailable = obj.rInputReqStream.available;
% if bytesAvailable >= msgSize
% break
% end
%
% pause(.1);
% disp('waiting...')
%
% % breaks if too much time passed
% counter = counter + 1;
% if counter > 5
% requestOk = 0;
% return
% end
%
% end
message = [];
bytesRead = 0;
bytesReadTotal = 0;
while 1
bytesRead = obj.inChann.read(obj.buffer);
bytesReadTotal = bytesReadTotal + bytesRead;
tempMessage = obj.buffer.array;
tempMessage = tempMessage ( 1: obj.buffer.position )';
message = [message tempMessage];
obj.buffer.clear();
if bytesRead == 0 || bytesReadTotal >= msgSize
break;
end
end
% for i=1:msgSize
% message(i) = typecast(int8(obj.rInputReqStream.readByte()), 'uint8');
% end
% message = obj.buffer.array;
% message(msgSize:end) = [];
%
% the response is returned as uint8
[requestSize, request, response] = obj.decodeMessage(message);
% NFLogger.getLogger().log(['TBV Response received: ' response]);
catch error
error.message
requestOk = 0;
end
end
function [requestSize, request, response] = decodeMessage(obj, message)
requestSize = byteToNum( message(1:4) );
message(1:4) = [];
request = char( message(1:requestSize) );
message(1:requestSize) = [];
response = message;
end
end
end