Clojure Meetup on 6/9

gistfile1.txt

Introduction to Pedestal --- They finally had a recruiter.

Rentpath is looking for a senior clojure and senior ruby

CareerBuilder is looking for a clojure person. They're moving a lot of stuff to clojure.

Stuart Hinson, asked about familiarity with Ring, works at RentPath
 
Aims to be simple.

They ripped out the clojurescript stuff cause react is cool yo

Currently ring ties a thread up until it's done with the request, you eventually need to collect your core async if nothing else to do the response

Interceptors handle all the middleware: Routing, errors, middleware, etc
 
Increases our thread consumption, so eventually runs out on the JVM

Why not Pedestal:

Currently doesn't do websockets

Less familiar than Rings

Can't share routing between client and server (for CLJs)  

service.clj is the data def of the app (routes, etc)

server.clj is the service 

Execute takes a context map, which is...the context of data about it, including a queue of interceptors

In enter, we transform the context through all the inteterceptor's enter functions, and apply the contexts through a stack, does the handle, then pops them off transforming the requests through backwards, as a stack would

Buuuut, if we yield a channel, it throws out the old thread, and makes a go thread. Letting you swap between them between async and sync

Having interceptors as data gives lets them play with metadata a bit easier during auth

They use this functionality at RP to make a browser repl, 

stlyeobate is hardcoded in pedestal, serverlet/ring interface info

Routing interceptor primarily makes new interceptors on a request based on the map

Primarily use the enter if you only have one way directionality, just return a response map

It does a lot of the fuzzy thread pool stuff

Pedestal does swagger some stuff that ring-swagger was not good enough to do for async stuff

Interceptors are not used for everything, we also use get and put items

They use Enlive to append the script tag, then the start the browser repl

He has a blogpost about how the browser REPL works: Stuarth.github.io