docs/server_interface.md
Server modules are Node.js [modules][nodemods] that receive metrics for StatsD. Server interfaces can be distributed and installed via systems such as NPM.
Each server module should export the following initialization function:
start(config, callback): This method is invoked from StatsD to initialize
and start the server module listening for metrics. It accepts two
parameters: config is the parsed config file hash and callback is a
function to call with metrics data, when it's available.
The callback function accepts two parameters: packet contains one or more
metrics separated by the \n character, and rinfo contains remote address
information.
The server module should return true from start() to indicate
success. A return of false indicates a failure to load the module
(missing configuration?) and will cause StatsD to exit.