js concepts and api

8/8/2019 JS Concepts and API

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Day 2 Across The Tiers with Express.js JS Concepts & APIs



File System

I/O



Node APIs

File System

I/O



Node APIs

Patterns for ManagingAsync

File System

I/O



ccessing DataSources

Node APIs


File System

I/O




rchitecture

Node APIs


File System

I/O




Express!sFrame"or#

rchitecture

Node APIs


File System

I/O




Express!sFrame"or#

$ES%ful API

rchitecture

Node APIs


File System

I/O



Filesystem I!



Filesytem " #asic I!



Filesystem " Synchrono$s %s. Asynchrono$s



how"to sample



For & Answer '$estionsDay 2 '$i( )



Async Patterns



Call*acs



+o,e API " Call*acs



+o,e API " Call*acs- The +o,e ay



Promises



/$l0lle,

&

pen,in1'

(

rejecte,

settle,)



+o,e API " Promises Instantiation



+o,e API " Promises sa1e



how"to sample



For & Answer '$estionsDay 2 '$i( 2



+o,e APIs



+o,e API " E%ent Emitter



SSE or Ser%er Sent E%ents

p$sh noti0cations



e* Socets

we* socets



realtime /ramewor

prim$s



+o,e API " Socet.io



#$3ers



4anip$lates- creates-an, cons$mes octetstreams.

5aw ,ata is store, ininstances o/ the#$3er Class.

Ja%aScript ,oesn6tspea *inary ,ata.

TCP Streams

Filesystem

#$3ers



new #$3er7si(e8

&

new #$3er7*$3er8'

(

new #$3er7array8

new #$3er7str9- enco,in1:8)



*ucs&*

*+inar**hex*

*+ase,)*

*utf-**utf(,le*

*ascii*

/or ; *it ASCII ,ata only. This enco,in1metho, is %ery /ast- an, will strip the

hi1h *it i/ set.



*ucs&*

*+inar**hex*

*+ase,)*

*utf-**utf(,le*

*ascii*

4$lti*yte enco,e, nico,e characters.4any we* pa1es an, other ,oc$ment/ormats $se TF"<.



*ucs&*

*+inar**hex*

*+ase,)*

*utf-**utf(,le*

*ascii*

2 or = *ytes- little en,ian enco,e,nico,e characters. S$rro1ate pairs7>)???? to >)?FFFF8 ares$pporte,.



*ucs&*

*+inar**hex*

*+ase,)*

*utf-**utf(,le*

*ascii*

Alias o/ @$t/)le@.



*ucs&*

*+inar**hex*

*+ase,)*

*utf-**utf(,le*

*ascii*

#ase= strin1 enco,in1.



*ucs&*

*+inar**hex*

*+ase,)*

*utf-**utf(,le*

*ascii*

A way o/ enco,in1 raw *inary ,ata intostrin1s *y $sin1 only the 0rst < *its o/each character. This enco,in1 metho,

is ,eprecate, an, sho$l, *e a%oi,e, in/a%or o/ #$3er o*jects where possi*le.This encoding will be removed infuture versions of Node.



*ucs&*

*+inar**hex*

*+ase,)*

*utf-**utf(,le*

*ascii*

Enco,e each *yte as twohexa,ecimal characters.



Streams



+o,e API " Streams



how"to sample



For & Answer '$estionsDay 2 '$i( B



Data So$rces



Connectors & So$rces



how"to sample



Alternates A..A. +oS'

,ata str$ct$res



#ey/.alue



graph



time series



,ata*ase architect$re



For & Answer '$estionsDay 2 '$i( =



Architect$re



e%ent loop



no,e cl$sterin1



4an$ally

oa, #alancin1



AS Example

oa, #alancin1



AS Example Expan,e,

oa, #alancin1



A$tomate, Testin1



4essa1e '$e$es & Cache Ser%ices



+o,e.js 4i,,leware Pattern



how"to sample



For & Answer '$estionsDay 2 '$i(



ExpressFramewor



4o,el

4C

Controlleriew



SPAs

&

(

APIs



Express.js " Installin1 & Project Set$p



Express.js " Application Generator



how"to sample



For & Answer '$estionsDay 2 '$i(



5EST/$l APIs

hat is an APIH



In we* parlance an API is a simple inter/acethat will per/orm a partic$lar action.

Ser%ice !riente, Architect$re o/ten comes tomin, with the correlation to micro"ser%icesan, relate, API ,ri%en ,esi1n i,eas.

hat is an APIH

S!A 5e%isite,H



TTP er*s



GET

&

PT'

(

P!ST

PDATE'



En, Points



P% /tic#ets/(& 0 pdates tic#et1(&

DE2E%E /tic#ets/(& 0 Deletes tic#et1(&

PA%34 /tic#ets/(& 0 Partially updatesic#et 1(&

5E% /tic#ets/(& 0 $etrie.es a speci6cic#et

POS% /tic#ets 0 3reates a ne"

ic#et

5E% /tic#ets 0 $etrie.es a list of

ic#ets



how"to sample



For & Answer '$estionsDay 2 '$i( ;

js concepts and api

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