javascript - how can I log every method call in node.js without adding debug lines everywhere? -

i log user_id of person making request , method name of every method called javascript class. example:

35 - log_in 35 - list_of_other_users 78 - log_in 35 - send_message_to_user 35 - connect_to_redis 78 - list_of_other_users 

since async user 35 , 78 might doing stuff @ same time. want make sure each log line starts user_id can grep , see 1 user's activity @ time.

is there super clever way without adding logger statements every method?

i'm guessing web app, in case if using connect can use logger middleware logs user , url path, sufficient. otherwise, going have metaprogramming along lines of wrapping each function in wrapper function logging.

function logcall(realfunc, instance) {     return function() {       log.debug('user: ' + instance.user_id + ' method ' + realfunc.name);       return realfunc.apply(instance, arguments);     }; } 

for work, class method's must named functions, not anonymous.

function sendmessage() {     //code send message     //can use `this` access instance properties } function myclass(userid) {     this.userid = userid; //or whatever     this.sendmessage = logcall(sendmessage, this);     //repeat above line each instance method want instrumented logging }