【发布时间】：2017-04-10 23:36:34
【问题描述】：
我创建了一个带有以下内容的 luminus 项目
lein new luminus chess +auth +swagger +cljs
我正在尝试使用 google datastore api，但遇到了这个问题
Can't call public method of non-public class: public (Google gcloud library)
尝试从 clojure 调用 api 时。所以我试图将我对 api 的使用包装在我自己的 Java 代码中，然后我从我的 Clojure 代码中调用。
导入我的 java 代码的代码如下，它甚至还没有从 gcloud 导入中调用代码。
(ns chess.routes.home
(:require [chess.layout :as layout]
[compojure.core :refer [defroutes GET]]
[ring.util.http-response :as response]
[clojure.java.io :as io])
(:import [gcloud GCloud]))
(defn home-page []
(layout/render "home.html"))
(defroutes home-routes
(GET "/" []
(home-page))
(GET "/docs" []
(-> (response/ok (-> "docs/docs.md" io/resource slurp))
(response/header "Content-Type" "text/plain; charset=utf-8"))))
而我的java代码只是
package gcloud;
public class GCloud {
public static void put() {
System.out.println("sdfsd");
}
}
然而，当我执行 lein javac 时，它会失败，如下所示。如果我从 clojure 代码中删除 gcloud 导入，那么 lein javac 会成功地在目标目录中为我的 java 代码输出一个类文件。但是为什么 lein javac 甚至完全看 clojure 代码而不处理纯 java 呢？
$ lein javac
Exception in thread "main" java.lang.ExceptionInInitializerError
at clojure.main.<clinit>(main.java:20)
Caused by: java.lang.ClassNotFoundException: gcloud.GCloud, compiling:(chess/routes/home.clj:1:1)
at clojure.lang.Compiler.load(Compiler.java:7391)
at clojure.lang.RT.loadResourceScript(RT.java:372)
at clojure.lang.RT.loadResourceScript(RT.java:363)
at clojure.lang.RT.load(RT.java:453)
at clojure.lang.RT.load(RT.java:419)
at clojure.core$load$fn__5677.invoke(core.clj:5893)
at clojure.core$load.invokeStatic(core.clj:5892)
at clojure.core$load.doInvoke(core.clj:5876)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invokeStatic(core.clj:5697)
at clojure.core$load_one.invoke(core.clj:5692)
at clojure.core$load_lib$fn__5626.invoke(core.clj:5737)
at clojure.core$load_lib.invokeStatic(core.clj:5736)
at clojure.core$load_lib.doInvoke(core.clj:5717)
at clojure.lang.RestFn.applyTo(RestFn.java:142)
at clojure.core$apply.invokeStatic(core.clj:648)
at clojure.core$load_libs.invokeStatic(core.clj:5774)
at clojure.core$load_libs.doInvoke(core.clj:5758)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invokeStatic(core.clj:648)
at clojure.core$require.invokeStatic(core.clj:5796)
at clojure.core$require.doInvoke(core.clj:5796)
at clojure.lang.RestFn.invoke(RestFn.java:619)
at chess.handler$eval25329$loading__5569__auto____25330.invoke(handler.clj:1)
at chess.handler$eval25329.invokeStatic(handler.clj:1)
at chess.handler$eval25329.invoke(handler.clj:1)
at clojure.lang.Compiler.eval(Compiler.java:6927)
at clojure.lang.Compiler.eval(Compiler.java:6916)
at clojure.lang.Compiler.load(Compiler.java:7379)
at clojure.lang.RT.loadResourceScript(RT.java:372)
at clojure.lang.RT.loadResourceScript(RT.java:363)
at clojure.lang.RT.load(RT.java:453)
at clojure.lang.RT.load(RT.java:419)
at clojure.core$load$fn__5677.invoke(core.clj:5893)
at clojure.core$load.invokeStatic(core.clj:5892)
at clojure.core$load.doInvoke(core.clj:5876)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invokeStatic(core.clj:5697)
at clojure.core$load_one.invoke(core.clj:5692)
at clojure.core$load_lib$fn__5626.invoke(core.clj:5737)
at clojure.core$load_lib.invokeStatic(core.clj:5736)
at clojure.core$load_lib.doInvoke(core.clj:5717)
at clojure.lang.RestFn.applyTo(RestFn.java:142)
at clojure.core$apply.invokeStatic(core.clj:648)
at clojure.core$load_libs.invokeStatic(core.clj:5774)
at clojure.core$load_libs.doInvoke(core.clj:5758)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invokeStatic(core.clj:648)
at clojure.core$require.invokeStatic(core.clj:5796)
at clojure.core$require.doInvoke(core.clj:5796)
at clojure.lang.RestFn.invoke(RestFn.java:551)
at chess.core$eval25323$loading__5569__auto____25324.invoke(core.clj:1)
at chess.core$eval25323.invokeStatic(core.clj:1)
at chess.core$eval25323.invoke(core.clj:1)
at clojure.lang.Compiler.eval(Compiler.java:6927)
at clojure.lang.Compiler.eval(Compiler.java:6916)
at clojure.lang.Compiler.load(Compiler.java:7379)
at clojure.lang.RT.loadResourceScript(RT.java:372)
at clojure.lang.RT.loadResourceScript(RT.java:363)
at clojure.lang.RT.load(RT.java:453)
at clojure.lang.RT.load(RT.java:419)
at clojure.core$load$fn__5677.invoke(core.clj:5893)
at clojure.core$load.invokeStatic(core.clj:5892)
at clojure.core$load.doInvoke(core.clj:5876)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core$load_one.invokeStatic(core.clj:5697)
at clojure.core$load_one.invoke(core.clj:5692)
at clojure.core$load_lib$fn__5626.invoke(core.clj:5737)
at clojure.core$load_lib.invokeStatic(core.clj:5736)
at clojure.core$load_lib.doInvoke(core.clj:5717)
at clojure.lang.RestFn.applyTo(RestFn.java:142)
at clojure.core$apply.invokeStatic(core.clj:648)
at clojure.core$load_libs.invokeStatic(core.clj:5774)
at clojure.core$load_libs.doInvoke(core.clj:5758)
at clojure.lang.RestFn.applyTo(RestFn.java:137)
at clojure.core$apply.invokeStatic(core.clj:648)
at clojure.core$require.invokeStatic(core.clj:5796)
at clojure.core$require.doInvoke(core.clj:5796)
at clojure.lang.RestFn.invoke(RestFn.java:436)
at user$eval3$loading__5569__auto____4.invoke(user.clj:1)
at user$eval3.invokeStatic(user.clj:1)
at user$eval3.invoke(user.clj:1)
at clojure.lang.Compiler.eval(Compiler.java:6927)
at clojure.lang.Compiler.eval(Compiler.java:6916)
at clojure.lang.Compiler.load(Compiler.java:7379)
at clojure.lang.RT.loadResourceScript(RT.java:372)
at clojure.lang.RT.loadResourceScript(RT.java:359)
at clojure.lang.RT.maybeLoadResourceScript(RT.java:355)
at clojure.lang.RT.doInit(RT.java:475)
at clojure.lang.RT.<clinit>(RT.java:331)
... 1 more
Caused by: java.lang.ClassNotFoundException: gcloud.GCloud
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at clojure.lang.DynamicClassLoader.findClass(DynamicClassLoader.java:69)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at clojure.lang.DynamicClassLoader.loadClass(DynamicClassLoader.java:77)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at clojure.lang.RT.classForName(RT.java:2168)
at clojure.lang.RT.classForNameNonLoading(RT.java:2181)
at chess.routes.home$eval30242$loading__5569__auto____30243.invoke(home.clj:1)
at chess.routes.home$eval30242.invokeStatic(home.clj:1)
at chess.routes.home$eval30242.invoke(home.clj:1)
at clojure.lang.Compiler.eval(Compiler.java:6927)
at clojure.lang.Compiler.eval(Compiler.java:6916)
at clojure.lang.Compiler.load(Compiler.java:7379)
... 90 more
我的项目文件
(defproject chess "0.1.0-SNAPSHOT"
:description "FIXME: write description"
:url "http://example.com/FIXME"
:dependencies [[bouncer "1.0.0"]
[buddy "1.1.0"]
[compojure "1.5.1"]
[com.google.cloud/google-cloud-datastore "0.7.0"]
[cprop "0.1.9"]
[luminus-immutant "0.2.2"]
[luminus-nrepl "0.1.4"]
[markdown-clj "0.9.90"]
[metosin/compojure-api "1.1.9"]
[metosin/ring-http-response "0.8.0"]
[mount "0.1.10"]
[org.clojure/clojure "1.8.0"]
[org.clojure/clojurescript "1.9.293" :scope "provided"]
[org.clojure/tools.cli "0.3.5"]
[org.clojure/tools.logging "0.3.1"]
[org.webjars.bower/tether "1.3.7"]
[org.webjars/bootstrap "4.0.0-alpha.5"]
[org.webjars/font-awesome "4.6.3"]
[org.webjars/webjars-locator-jboss-vfs "0.1.0"]
[reagent "0.5.1"]
[ring-middleware-format "0.7.0"]
[ring-webjars "0.1.1"]
[ring/ring-defaults "0.2.1"]
[selmer "1.10.0"]]
:min-lein-version "2.0.0"
:jvm-opts ["-server" "-Dconf=.lein-env"]
:source-paths ["src/clj" "src/cljc"]
:java-source-paths ["src/java"]
:resource-paths ["resources" "target/cljsbuild"]
:target-path "target/%s/"
:main chess.core
:plugins [[lein-cprop "1.0.1"]
[lein-cljsbuild "1.1.4"]
[lein-immutant "2.1.0"]]
:clean-targets ^{:protect false}
[:target-path [:cljsbuild :builds :app :compiler :output-dir] [:cljsbuild :builds :app :compiler :output-to]]
:figwheel
{:http-server-root "public"
:nrepl-port 7002
:css-dirs ["resources/public/css"]
:nrepl-middleware [cemerick.piggieback/wrap-cljs-repl]}
:profiles
{:uberjar {:omit-source true
:prep-tasks ["compile" ["cljsbuild" "once" "min"]]
:cljsbuild
{:builds
{:min
{:source-paths ["src/cljc" "src/cljs" "env/prod/cljs"]
:compiler
{:output-to "target/cljsbuild/public/js/app.js"
:externs ["react/externs/react.js"]
:optimizations :advanced
:pretty-print false
:closure-warnings
{:externs-validation :off :non-standard-jsdoc :off}}}}}
:aot :all
:uberjar-name "chess.jar"
:source-paths ["env/prod/clj"]
:resource-paths ["env/prod/resources"]}
:dev [:project/dev :profiles/dev]
:test [:project/dev :project/test :profiles/test]
:project/dev {:dependencies [[prone "1.1.2"]
[ring/ring-mock "0.3.0"]
[ring/ring-devel "1.5.0"]
[pjstadig/humane-test-output "0.8.1"]
[binaryage/devtools "0.8.2"]
[com.cemerick/piggieback "0.2.2-SNAPSHOT"]
[doo "0.1.7"]
[figwheel-sidecar "0.5.8"]]
:plugins [[com.jakemccrary/lein-test-refresh "0.14.0"]
[lein-doo "0.1.7"]
[lein-figwheel "0.5.8"]
[org.clojure/clojurescript "1.9.293"]]
:cljsbuild
{:builds
{:app
{:source-paths ["src/cljs" "src/cljc" "env/dev/cljs"]
:compiler
{:main "chess.app"
:asset-path "/js/out"
:output-to "target/cljsbuild/public/js/app.js"
:output-dir "target/cljsbuild/public/js/out"
:source-map true
:optimizations :none
:pretty-print true}}}}
:doo {:build "test"}
:source-paths ["env/dev/clj" "test/clj"]
:resource-paths ["env/dev/resources"]
:repl-options {:init-ns user}
:injections [(require 'pjstadig.humane-test-output)
(pjstadig.humane-test-output/activate!)]}
:project/test {:resource-paths ["env/test/resources"]
:cljsbuild
{:builds
{:test
{:source-paths ["src/cljc" "src/cljs" "test/cljs"]
:compiler
{:output-to "target/test.js"
:main "chess.doo-runner"
:optimizations :whitespace
:pretty-print true}}}}
}
:profiles/dev {}
:profiles/test {}})
【问题讨论】：
-
请分享您的“project.clj”文件。确保您已正确设置
:java-source-paths。 -
嗯，这是一个很好的大小
project.clj:) 我会尝试通过有一个空的project clj，只有:java-source-paths，你的java类和一个调用它的clojure文件来查明问题.似乎在查找您的类时遇到了一些问题，这通常是项目配置或文件系统布局的问题。 -
@Shlomi 如果我删除 :profiles 键及其值（全部位于底部），那么奇怪的是 lein javac 有效。所以不知何故，那里的价值导致clojure代码被编译？？？
-
您使用的确切的 lein 逗号是什么？尝试将默认配置文件添加到您的命令中，例如
lein with-profile default javac，看看是否有帮助，我前段时间也遇到过这个问题，但不记得我做了什么。