clojure-java-interop

The case doc says Unlike cond and condp, case does a constant-time dispatch... All manner of constant expressions are acceptable in case. I would like to benefit from case 's constant-time dispatch to match on Java enums. Java's switch statement works well with enums, but doing the following in Clojure: (defn foo [x] (case x java.util.concurrent.TimeUnit/MILLISECONDS "yes!")) (foo java.util.concurrent.TimeUnit/MILLISECONDS) Results in: IllegalArgumentException No matching clause: MILLISECONDS Are enums not supported in case ? Am I doing something wrong? Must I resort to cond or is there a

I am trying to parse a fairly small (< 100MB) xml file with: (require '[clojure.data.xml :as xml] '[clojure.java.io :as io]) (xml/parse (io/reader "data/small-sample.xml")) and I am getting an error: OutOfMemoryError Java heap space clojure.lang.Numbers.byte_array (Numbers.java:1216) clojure.tools.nrepl.bencode/read-bytes (bencode.clj:101) clojure.tools.nrepl.bencode/read-netstring* (bencode.clj:153) clojure.tools.nrepl.bencode/read-token (bencode.clj:244) clojure.tools.nrepl.bencode/read-bencode (bencode.clj:254) clojure.tools.nrepl.bencode/token-seq/fn--3178 (bencode.clj:295) clojure.core

We're working on a project that has some Clojure-Java interop. At this point we have a single class that has a variety of dependencies which we put into a user library in Eclipse for development, but of course that doesn't help when using Leiningen (2.x). Most of our dependencies are proprietary, so they aren't on a repository somewhere. What is the easiest/right way to do this? I've seen leiningen - how to add dependencies for local jars? , but it appears to be out of date? Update: So I made a local maven repository for my jar following these instructions and the lein deployment docs on

I have the following code: (ns test-hook.core) (defn -main [] (.addShutdownHook (Runtime/getRuntime) (Thread. #(println "shutdown"))) (println "start") (doseq [i (range 1 6)] (Thread/sleep 1000) (println i))) and the following project.clj (defproject test-hook "1.0.0-SNAPSHOT" :aot :all :main test-hook.core :description "FIXME: write description" :dependencies [[org.clojure/clojure "1.2.0"]]) when I run it with "lein run" the shutdown hook only gets executed on normal program execution, not when receiving SIGINT (Ctrl-C) the same code when ran outside of lein successfully executes the shutdown

I am trying to use the argon-jvm library for hashing in my application. By default this library uses Argon2i , However, I would like to use Argon2id . To do so, I need to pass the enum value Argon2Factory.Argon2Types.Argon2id to the overloaded create method in the Argon2Factory class. Source code for Argon2Factory.java here . From the lein repl (affter adding [de.mkammerer/argon2-jvm "2.4"] as a dependency), I can do the following: user=> (import 'de.mkammerer.argon2.Argon2Factory) de.mkammerer.argon2.Argon2Factory user=> (def argon2 (Argon2Factory/create)) #'user/argon2 user=> (def

I have a java.util.HashMap object m (a return value from a call to Java code) and I'd like to get a new map with an additional key-value pair. If m were a Clojure map, I could use: (assoc m "key" "value") But trying that on a HashMap gives: java.lang.ClassCastException: java.util.HashMap cannot be cast to clojure.lang.Associative No luck with seq either: (assoc (seq m) "key" "value") java.lang.ClassCastException: clojure.lang.IteratorSeq cannot be cast to clojure.lang.Associative The only way I managed to do it was to use HashMap 's own put , but that returns void so I have to explicitly

Is it possible to easily manage and compile native Java classes alongside Clojure in a project using leiningen? I am working at a pretty low level (with netty nio) and thinking that some of the plumbing classes would actually be easier to handle as raw java both in terms of constructing the code as well as performance. Alex Ott In Leiningen tutorial there is following statement For projects that include some Java code, you can set the :java-source-path key in project.clj to a directory containing Java files. Then the javac compiler will run before your Clojure code is AOT-compiled, or you can