node.js: zápisky z fronty

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zápisky z fronty Lukáš @almadcz Linhart

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Historie webu (stručná a nepřesná)

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Web ’95

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Web 27.8.2001

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Web ’05

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Web ’12

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Server push je standard

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Chtěl jsi se odhlásit?

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Více datových zdrojů

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Y U NO ORM object?

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Data z jiných služeb

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haters gonna hate

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Smyčka

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JavaScript

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...všude...

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Kafe pomáhá

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Neblokující I/O

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Existující komunita

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Streamování

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Estetika

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tail -‐f /var/log/messages | coﬀee logserver.coﬀee

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Stream & pipes

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Problémy

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“Než začít s node, to se radši oženim a pořídim si děti” -- Ondřej Baláž, system bachelor, Oracle Zvyk je železná košile

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CPU

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Funkce getData = -‐> “mock data”

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Změna zdroje dat getData = (cb) -‐> Model.ﬁndOne() (m) -‐> cb m.data

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Chybějící callback

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Přestínění

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newFunction = -‐> log = 'abc' newFunction = function() { var log; return log = 'abc'; };

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log = require './log' newFunction = -‐> log = 'abc' log = require('./log'); newFunction = function() { return log = 'abc'; };

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API je pro konzervy

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Výjimky zabíjí

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“The guys that are getting paid the big bucks to deliver scalable solutions aren’t up at night feverishly rewriting their systems in Node. They’re doing what they’ve always done: measuring, testing, benchmarking, thinking hard, keeping up with the academic literature that pertains to their problems. That’s what scaling in the large necessitates.” -‐-‐ Alex Payne Škálování

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Concurrency lock-‐in

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Kam s ním?

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The Way of Node • Node is a platform. • Node is JavaScript. • Node is callbacks & Streams. • Node is not pretending it is blocking when it is not. • Node is not going to include that module. • Node is for building. • Node is a community. • Node is faster. • Node is fun. -‐-‐ Mikeal Rogers

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Thank You • http://pinkie.ponychan.net/chan/files/src/133479594662.png • http://www.flickr.com/photos/sukanto_debnath/519690623/sizes/o/in/photostream/ • http://www.flickr.com/photos/nicholasro/4784567537/sizes/z/in/photostream/ • http://www.flickr.com/photos/7989285@N07/1794265047/sizes/z/in/photostream/ • http://www.flickr.com/photos/28157757@N05/5715697350/sizes/l/in/photostream/ • http://www.flickr.com/photos/oskay/265899784/sizes/l/in/photostream/ • http://www.flickr.com/photos/tambako/4831699383/sizes/l/in/photostream/ • http://www.flickr.com/photos/astragony/4852775794/sizes/l/in/photostream/ • http://www.flickr.com/photos/albertoalerigi/2886157131/sizes/l/in/photostream/ • http://www.flickr.com/photos/tambako/2361526167/sizes/l/in/photostream/ • http://www.flickr.com/photos/jam343/4952338/sizes/o/in/photostream/ • http://www.flickr.com/photos/stolensnapshot/3333052115/sizes/l/in/photostream/ • http://www.flickr.com/photos/seeminglee/601883302/sizes/o/in/photostream/ • http://www.flickr.com/photos/yakobusan/2995035580/sizes/o/in/photostream/ • http://www.flickr.com/photos/striatic/2191404675/sizes/z/in/photostream/ • http://www.flickr.com/photos/boltron/4461019149/ • http://www.flickr.com/photos/olibac/3462198490/sizes/o/in/photostream/ • http://www.flickr.com/photos/anieto2k/5401318057/sizes/l/in/photostream/ • http://www.flickr.com/photos/68387408@N00/2661844560/ • http://www.flickr.com/photos/raindrift/7095243379/in/set-‐72157629492908038/ • http://www.flickr.com/photos/13589188@N00/3164471672/ • http://www.flickr.com/photos/67471595@N00/1353578358/ • http://www.flickr.com/photos/26063220@N00/3480359060/ Everything under CC commercial on flickr through compfights -- thanks you too! (aka Credits)