Runtime Monitoring Agent

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Originally published at Internet.com

Often while developing an application, programmer needs an information about a value of specific variable, time needed to execute a piece of code or just plain info that some function/module has been entered/exited. Most of these information can be collected using a debugger but, debugger interrupts normal program execution (critical for communication programs) and doesn't give any time related info (for example, how long does it take to execute an SQL statement or what is the time difference between sending a command and receiving a response from a device connected to a serial port). Also, once you build a release version, you lose any debugging capabilities unless they are hard-coded into the program.

Most often, programmers use dump to file as a way to collect info but it has several limitations. You cannot view info while program is running, you lose some or all data if program crashes and it's very difficult to find something in a mass of data collected in this way.

That's were Runtime Monitoring Agent (plain Agent in further text) comes in !!!

Agent is a separate, stand-alone process which uses Win32 inter process communication facilities to receive programmer defined messages coming from a client process via an Agent DLL loaded into the client process. Agent has an Explorer like user interface. One of the requirements we set for the Agent was that it can be used with programming environments other then C++ (for example, Delphi). This is the reason why the Agent is statically linked with MFC and C++ runtime library (programmer doesn't need anything else but the Agent itself to run it on a target computer). Agent DLL is a non-MFC DLL with a very small footprint. It is used for programming environments like Delphi. For convenience and for Visual C++ projects, there is also a C++ Agent LIB library which takes care of dynamically loading the Agent DLL. It is also very small and will enable a process to work even if Agent DLL is not found or Agent is not running...

Read article at Internet.com site