TSimulator is a program (proof of concept) made to simulate the traffic of a website trading just one stock. For the sake of simplicity, it assumes that the bids come through four connections, although this can be changed with little modification to the code. It uses a sorted list, as well as multithreading with background data synchronization. The binary could be found here.

To build the program,

$ msbuild TSimulator.sln

To run the program,

$ ./TSimulator.exe history input output stream1 stream2 stream3 stream4

history

• This file contains the sorted bids for the previous day.
• The first line contains an integer n: the number of bids in the file.
• The n following lines each contain an integer b: a bid value.
• These lines are sorted in increasing order.

input

• This is the control input file: it's an interactive file that sends commands to the program
• The possible commands are: top, end. More details below.

output

• This is the control output file: it's an interactive file where the program writes requested data

stream1, stream2, stream3, stream4

• These are the bids streams: they are interactive files that periodically receive bids

$ echo >> num >> stream_file_name

where num is the dollar amount of your bid and stream_file_name is the filename of your streaming text file. (stream1, stream2, stream3, or stream4)

$ echo >> command >> input_file_name

where command follows the syntax of a command and input_file_name is the filename entered as input in the initial program arguments.

###Commands

top numBids numOutput

where numBids is the number of bids for the program to wait for before executing the top command, and numOutput is the number of top numOutput bids for the program to output to the specified output path.

end

signifies that the trading day has finished and the program can safely exit. A history file of today's bids in ascending order is saved to the history path specified in the initial program arguments.

##Other notes

• Ensure that stream1, stream2, stream3, stream4, and input are empty files upon program execution.
• Ensure that the first line in history corresponds to the amount of lines following it.

##Issues Check the issues page for issues.