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August 29, 2015 14:11
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wrap caolan async.auto with logging for sub-call start/end timings
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function loggedAsyncAuto (obj, doneCb) { | |
var globalStart; | |
function time () { | |
return new Date().getTime(); | |
} | |
function elapsed (now) { | |
var s = '' + (now - globalStart); | |
return _.times(5 - s.length, function () { return ' '; }).join('') + s; | |
} | |
var keys = _.keys(obj); | |
var done = _.after(keys.length, function () { | |
console.log('finished async.auto of [' + keys.join(', ') + '] in ' + (time() - globalStart) + ' ms'); | |
}); | |
var wrappedObj = _.object(keys, _.map(obj, function (fnish, name) { | |
var fn; | |
var wrappedFn = function (cb, results) { | |
var myStart = time(); | |
if (!globalStart) { | |
globalStart = myStart; | |
console.log(elapsed(myStart) + ' starting async.auto of [' + keys.join(', ') + ']'); | |
} | |
console.log(elapsed(myStart) + ' start ' + name); | |
fn(function () { | |
var now = time(); | |
console.log(elapsed(now) + ' finish ' + name + ' in ' + (now - myStart) + ' ms'); | |
done(); | |
cb.apply(this, arguments); | |
}, results); | |
}; | |
if (_.isFunction(fnish)) { | |
fn = fnish; | |
return wrappedFn; | |
} else { | |
fn = fnish[fnish.length - 1]; | |
var rval = fnish.slice(); | |
rval[rval.length - 1] = wrappedFn; | |
return rval; | |
} | |
})); | |
async.auto(wrappedObj, doneCb); | |
} |
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