# Application Logs

Debug output is provided by the debug module.

The supported namespaces are:

• jagql:handler:search
• jagql:handler:find
• jagql:handler:create
• jagql:handler:delete
• jagql:handler:update
• jagql:validation:input
• jagql:validation:output
• jagql:include
• jagql:filter
• jagql:errors
• jagql:requestCounter

To view the debugging output, provide a comma separated list (or wildcarded via *) of namespaces in the DEBUG environment variable, for example:

$ DEBUG=jagql:handler:find npm test

$ DEBUG=jagql:handler:* npm test

# Integration with application logging

If you wish to integrate @jagql/framework debug output with your application's logging solution, you can override the functions that are invoked for outputting the messages for the supported namespaces by invoking the package's debugging.__overrideDebugOutput(outputFnFactory) function where the outputFnFactory parameter is a function that expects a namespace string parameter and returns an output function for the namespace.

A simple example of this functionality in action would be:

var debugging = require("@jagql/framework/lib/debugging");

var outputFnfactory = function(namespace) {
  return function(message) {
    console.log(namespace + ">>>", message);
  }
}

debugging.__overrideDebugOutput(outputFnfactory);