Steps with Java lambda expressions can now access external maven depe…

…ndencies on classpath (fix for issue #5)

src/clj/titanoboa/dependencies.clj

@@ -8,7 +8,8 @@
  [clojure.java.io :as io]
  [dynapath.util :as dp]
  [dynapath.dynamic-classpath :as dc]
- [compliment.utils])
+ [compliment.utils]
+ [titanoboa.exp])
  (:import (java.io File FileOutputStream)))
 
 (def dependencies-path-property "boa.server.dependencies.path")
@@ -54,7 +55,8 @@
  (when-let [i (:import ext-coordinates)]
  (log/info "Importing external classes: " i)
  (when (sequential? i) (mapv #(import %) i)))
- (compliment.utils/flush-caches)))
+ (compliment.utils/flush-caches)
+ (titanoboa.exp/init-java-lambda-factory! (.getContextClassLoader (Thread/currentThread)))))
 
  ;;TODO there might be need for retry in case the file stays locked for longer?
 (defrecord DepsWatcherComponent [deps-file-path stop-callback-fn last-content-atom]

src/clj/titanoboa/exp.clj

@@ -1,12 +1,12 @@
 (ns titanoboa.exp
  (:require [clojure.walk :as walk]
  [cognitect.transit :as transit]
+ [clojure.java.classpath :as cp]
  [clojure.tools.logging :as log]
  [cognitect.transit :as transit]
  [taoensso.nippy :as nippy]
- [titanoboa.dependencies :as deps]
  [titanoboa.singleton :as singleton])
- (:import [pl.joegreen.lambdaFromString LambdaFactory DynamicTypeReference]
+ (:import [pl.joegreen.lambdaFromString LambdaFactory DynamicTypeReference LambdaFactoryConfiguration]
  (java.io ObjectOutputStream)
  (clojure.lang PersistentArrayMap)
  (java.util Map)
@@ -16,7 +16,18 @@
 (def ^:dynamic *properties* {})
 (def ^:dynamic *jobdir* nil)
 
-(def java-lambda-factory (LambdaFactory/get))
+(def java-lambda-factory nil)
+
+(defn init-java-lambda-factory!
+ ([cl]
+ (let [c-path (reduce (fn [v i] (str v (.getCanonicalPath i) java.io.File/pathSeparatorChar)) "" (cp/classpath cl))]
+ (alter-var-root #'java-lambda-factory (constantly (LambdaFactory/get (-> (LambdaFactoryConfiguration/get)
+ (.withParentClassLoader cl)
+ (.withCompilationClassPath c-path)))))))
+ ([]
+ (init-java-lambda-factory! (.getContextClassLoader (Thread/currentThread)))))
+
+(init-java-lambda-factory!)
 
 (defrecord Expression [value type])