@noisesmith, that is really good to know! But undocumented, right?

hmm... I thought I saw it documented somewhere, let me see if I can dig it up

there are examples here and there, but I don't find anything mentioning that all the -> related macros are designed to work inside -> http://clojuredocs.org/clojure.core/as-%3E#example-568eeddae4b0f37b65a3c280

oh wow this one - I never thought of using as-> with destructuring http://clojuredocs.org/clojure.core/as-%3E#example-5b5e08e9e4b00ac801ed9e3a

I guess it's implied that nesting would work, since it isn't prohibited.

That is an interesting one with as-> and :as.

i'd like to use clojure to generate some defrecord classes (and some helper methods) that i intend to consume from Java... eg:

(ns my.core
  (:gen-class :name my.core.Support :methods [^:static [getEvents [] ...]]))

(defrecord Event [^String name ^Date date_])
(def -getEvents [] ...seq of Events...)

import my.core.Event;
import my.core.Support;
...
public static void main(String[] args) {
   events = new ArrayList<Event>(Support.getEvents()); 
   // ^^ i get ClassCastException here b/c the imported Event is loaded by AppClassLoader
   //     but the Events produced by the clojure-compiled gen-class are loaded by clojure's DynamicClassLoader
   //  ... what's the best way to do this kind of thing
}

don't you have to load Support before Event at the very least?

I've found calling Clojure via Java to be much easier with the clojure.lang.RT static methods (var, require, etc.) rather than trying to use gen-class namespaces as classes

hmm i do need to statically link/compile in my case.. .. wondering if there's a way to tell Clojure to load certain classes like these instead of dynamically complie them

you can't call the clojure API from the java code?

if you properly aot-compiled you will be able to import the classes, and the classes will in turn initialize clojure if it isn't initialized yet

oh sweet @noisesmith didn't know you could nest ->> and as-> inside a ->... feel like i'm gonna overuse this thoroughly now

(a gotcha is that with eg. lein, it assumes that your java needs to be compiled before your clojure, and here I think you really want the opposite)

that's fixed with `:prep-tasks ["javac" "compile"]` :prep-tasks ["compile" "javac"] (fixed)

@atdixon what type are you defining for getEvents to return in gen-class btw?

(I assume java.util.Collection by context)

@atdixon this compiles:

interesting thx for that noisesmith, let me try something incidentally i'm using clojure-maven-plugin not lein so let me what i can find out here

@noisesmith very cool. thank you for doing that repro. it led me to a fix... while lein excludes the .clj sources from the built target/jar files, clojure-maven-plugin (what i'm using) does not do this by default so the presence of my clj source was causing clojure to prefer loading the defrecord by dynamic compilation rather than using the .class file that the static/linker was using - so the Event loaded by the java compiled code was not the same as the Event getting dynamically produced by clojure/DynamicClassLoader anyway i'm able to configure out the clj sources so that all is getting loaded by the AppClassLoader and now i'm working---thx again !

Anyone had issues with lein deps constantly failing with something like Could not transfer artifact amazonica:amazonica:pom:0.3.123 from/to clojars (): Connection reset during docker build and remember a solution?

This particular dependency doesn't seem like the issue, it's different every time. Works fine outside of docker.

How to figure out how to mute logging for Java dependency? I use flyway and it make so huge mess in REPL by printing even debug info. In the past this was working (.setLevel (Logger/getLogger "org.flywaydb") Level/WARNING), but not today (new ver. of flyway? I guess they changed logger or something). How to deal with such situations?

Ages ago I think I saw some people talking about the http://4clojure.com site. I'd like to contribute and get it working well, e.g. this https://github.com/4clojure/4clojure/issues/309 would be good to fix.

Anyone have any pointers?

has anyone used ions in production and can vouch for it? considering using it for a small production project

Does clojure have some command-line tools which are required by some clojure projects to run?

some projects depend on leiningen

More specifically, I am trying to run 'lein repl' in one such project's root, and I get 'clojure.lang.ExceptionInfo: Could not find clojure executable {:tried-paths ["/usr/local/bin/clojure"]}' which seems to indicate I should have /usr/local/bin/clojure

/usr/local/bin/clojure is installed by homebrew on my macos system. What are you using?

its part of clojure itself

I was trying Fulcro (following this documentation here: http://book.fulcrologic.com/#_about_this_book)

So it seems it's not related to leiningen actually but how that Fulcro template is set up

I am sorry, but I don’t know.

maybe ask in #fulcro ^^!

Yeah! good idea, thanks Lennart 🙂