我正在构建一个服务器程序来为包含照片详细信息的 mongo 数据库提供 API。从 REPL 运行它一切正常，或者如果我使用 lein run 启动它。
当我尝试运行 uberjar 时会出现问题。构建 uberjar 工作正常:
(master) photo-api: lein uberjar
Compiling photo-api.env
Compiling photo-api.config
Compiling photo-api.core
WARNING: find-keyword already refers to: #'clojure.core/find-keyword in namespace: image-lib.core, being replaced by: #'image-lib.core/find-keyword
Compiling photo-api.db.core
Compiling photo-api.handler
Compiling photo-api.layout
Compiling photo-api.middleware
Compiling photo-api.routes.home
Compiling photo-api.routes.services
Created /Users/iain/Code/Clojure/Luminus/photo-api/target/uberjar/photo-api-0.1.0-SNAPSHOT.jar
Created /Users/iain/Code/Clojure/Luminus/photo-api/target/uberjar/photo-api.jar
(master) photo-api:
但是运行jar会出现错误:
(master) photo-api: java -jar target/uberjar/photo-api.jar
WARNING: find-keyword already refers to: #'clojure.core/find-keyword in namespace: image-lib.core, being replaced by: #'image-lib.core/find-keyword
read config from resource: "config.edn"
Exception in thread "main" java.lang.RuntimeException: could not start [#'photo-api.db.core/db*] due to
at mount.core$up$fn__420.invoke(core.cljc:92)
at mount.core$up.invokeStatic(core.cljc:92)
at mount.core$up.invoke(core.cljc:90)
at mount.core$bring.invokeStatic(core.cljc:210)
at mount.core$bring.invoke(core.cljc:202)
at mount.core$start.invokeStatic(core.cljc:252)
at mount.core$start.doInvoke(core.cljc:244)
at clojure.lang.RestFn.invoke(RestFn.java:397)
at mount.core$start_with_args.invokeStatic(core.cljc:350)
at mount.core$start_with_args.doInvoke(core.cljc:346)
at clojure.lang.RestFn.invoke(RestFn.java:410)
at photo_api.core$start_app.invokeStatic(core.clj:42)
at photo_api.core$start_app.invoke(core.clj:41)
at photo_api.core$_main.invokeStatic(core.clj:50)
at photo_api.core$_main.doInvoke(core.clj:49)
at clojure.lang.RestFn.invoke(RestFn.java:397)
at clojure.lang.AFn.applyToHelper(AFn.java:152)
at clojure.lang.RestFn.applyTo(RestFn.java:132)
at photo_api.core.main(Unknown Source)
Caused by: java.lang.NullPointerException
at com.mongodb.ConnectionString.<init>(ConnectionString.java:222)
at com.mongodb.MongoClientURI.<init>(MongoClientURI.java:189)
at com.mongodb.MongoClientURI.<init>(MongoClientURI.java:171)
at monger.core$connect_via_uri.invokeStatic(core.clj:230)
at monger.core$connect_via_uri.invoke(core.clj:230)
at photo_api.db.core$fn__12620.invokeStatic(core.clj:29)
at photo_api.db.core$fn__12620.invoke(core.clj:28)
at mount.core$record_BANG_.invokeStatic(core.cljc:86)
at mount.core$record_BANG_.invoke(core.cljc:85)
at mount.core$up$fn__420.invoke(core.cljc:93)
... 18 more
或快照 jar 。
(master) photo-api: java -jar target/uberjar/photo-api-0.1.0-SNAPSHOT.jar
Exception in thread "main" java.lang.NoClassDefFoundError: clojure/lang/Var
at photo_api.core.<clinit>(Unknown Source)
Caused by: java.lang.ClassNotFoundException: clojure.lang.Var
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 1 more
(master) photo-api:
我在这里缺少什么？我猜这与开发构建和生产构建的差异有关，但我找不到任何明显的东西，而且错误消息对我没有多大帮助。
据我所知，这是项目文件，大部分直接来自原始 luminus 模板:
(defproject photo-api "0.1.0-SNAPSHOT"
:description "API for geting data from photos db"
:url "http://soulflyer.com"
:dependencies [[cider/cider-nrepl "0.14.0"]
[clj-time "0.13.0"]
[com.google.guava/guava "20.0"]
[com.novemberain/monger "3.1.0" :exclusions [com.google.guava/guava]]
[compojure "1.6.0"]
[cprop "0.1.10"]
[funcool/struct "1.0.0"]
[luminus-immutant "0.2.3"]
[luminus-nrepl "0.1.4"]
[luminus/ring-ttl-session "0.3.2"]
[markdown-clj "0.9.99"]
[metosin/compojure-api "1.1.10"]
[metosin/muuntaja "0.3.1"]
[metosin/ring-http-response "0.9.0"]
[mount "0.1.11"]
[org.clojure/clojure "1.8.0"]
[org.clojure/tools.cli "0.3.5"]
[org.clojure/tools.logging "0.4.0"]
[org.clojure/data.json "0.2.6"]
[org.webjars.bower/tether "1.4.0"]
[org.webjars/bootstrap "4.0.0-alpha.5"]
[org.webjars/font-awesome "4.7.0"]
[org.webjars/jquery "3.1.1"]
[ring-webjars "0.2.0"]
[ring/ring-core "1.6.1"]
[ring/ring-defaults "0.3.0"]
[selmer "1.10.7"]
[image-lib "0.2.1-SNAPSHOT"]]
:min-lein-version "2.0.0"
:jvm-opts ["-server" "-Dconf=.lein-env"]
:source-paths ["src/clj"]
:test-paths ["test/clj"]
:resource-paths ["resources"]
:target-path "target/%s/"
:main ^:skip-aot photo-api.core
:plugins [[lein-cprop "1.0.3"]
[org.clojars.punkisdead/lein-cucumber "1.0.5"]
[lein-immutant "2.1.0"]]
:cucumber-feature-paths ["test/clj/features"]
:profiles
{:uberjar {:omit-source true
:aot :all
:uberjar-name "photo-api.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 "1.1.4"]
[ring/ring-mock "0.3.0"]
[ring/ring-devel "1.6.1"]
[pjstadig/humane-test-output "0.8.2"]
[clj-webdriver/clj-webdriver "0.7.2"]
[org.apache.httpcomponents/httpcore "4.4"]
[org.clojure/core.cache "0.6.3"]
[org.seleniumhq.selenium/selenium-server "2.48.2"]]
:plugins [[com.jakemccrary/lein-test-refresh "0.19.0"]
[refactor-nrepl "2.3.0-SNAPSHOT"]]
:source-paths ["env/dev/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"]}
:profiles/dev {}
:profiles/test {}})
最佳答案
我认为您只是缺少必需的配置 - 至少是 Mongo 连接字符串。
在开发模式下运行时，luminus(和 cprops 配置库)使用来自您的配置文件.clj 的配置。
但是，这是 leiningen 的事情，从 uberjar 运行时它不可用。
您可以在“config.edn”文件中指定所有“生产”配置并像这样运行uberjar:
java -Dconf=config.edn -jar target/uberjar/photo-api.jar
也可以使用java系统属性一一设置配置值。
有关更多详细信息，请参阅 http://www.luminusweb.net/docs/environment.md。
关于clojure - 为 luminus clojure 项目创建可执行文件的问题，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46291988/