无法调用非公共类的公共方法:public(Google gcloud 库) [英] Can't call public method of non-public class: public (Google gcloud library)

问题描述

我正在尝试使用 gcloud 库.

I am attempting to use the gcloud library.

(ns firengine.state
  (:import
   [com.google.cloud AuthCredentials]
   [com.google.cloud.datastore DatastoreOptions]))

(-> (DatastoreOptions/builder)
      (.projectId "<project_id>")
      (.authCredentials
       (AuthCredentials/createForJson
        (clojure.java.io/input-stream service-account-path)))
      .build)

以上 clojure 代码翻译自 以下代码片段(省略，点击在别处运行").

The above clojure code is translated from the following code snippet (ellided, click on "Run elsewhere").

import com.google.cloud.AuthCredentials;
import com.google.cloud.datastore.DatastoreOptions;

DatastoreOptions options = DatastoreOptions.builder()
  .projectId(PROJECT_ID)
  .authCredentials(AuthCredentials.createForJson(
    new FileInputStream(PATH_TO_JSON_KEY))).build();

当我从 Clojure REPL 调用此代码时，出现以下错误.

When I call this code from the Clojure REPL, I get the following error.

Unhandled java.lang.IllegalArgumentException
   Can't call public method of non-public class: public
   com.google.cloud.ServiceOptions$Builder
   com.google.cloud.ServiceOptions$Builder.projectId(java.lang.String)

            Reflector.java:   88  clojure.lang.Reflector/invokeMatchingMethod
            Reflector.java:   28  clojure.lang.Reflector/invokeInstanceMethod
boot.user4590132375374459695.clj:  168  firengine.state/eval17529
boot.user4590132375374459695.clj:  167  firengine.state/eval17529
             Compiler.java: 6927  clojure.lang.Compiler/eval
                              ... elided ...

com.google.cloud.datastore.DatastoreOptions 代码 可以在这里找到.

2016 年 6 月 29 日更新:根据 Schlomi 下面的建议，我想也许如果我 AOT 围绕 DatastoreOptions它会起作用.

Updated June 29, 2016: Pursuant to Schlomi's advice below, I thought that maybe if I AOT compiled my own wrapper around DatastoreOptions that it would work.

(ns firengine.datastore
  (:import
   [com.google.cloud AuthCredentials]
   [com.google.cloud.datastore Datastore DatastoreOptions Entity Key KeyFactory])
  (:gen-class
   :state state
   :init init
   :constructors {[String String] []}))

(defn -init
  [^String project-id ^String service-account-path]
  (let [service-account (clojure.java.io/input-stream service-account-path)
        credentials (AuthCredentials/createForJson service-account)
        dsoptions (-> (DatastoreOptions/builder)
                      (.projectId project-id)
                      (.authCredentials credentials)
                      .build)]
      [[] {:project-id project-id
                 :service-account-path service-account-path
                 :datastore-options dsoptions}]))

我修改了我的 boot development 任务以包含以下内容:

I modified my boot development task to include the following:

(deftask development
  "Launch Immediate Feedback Development Environment"
  []
  (comp
   (aot :namespace '#{firengine.datastore})
   (repl :port 6800)
   (reload)
   (watch)
   (cljs)
   (target :dir #{"target"})))

我试图像这样构造对象:

And I attempted to construct the object like so:

(def service-account-path (System/getenv "FIRENGINE_SERVICE_ACCOUNT_PATH"))

(def project-id (System/getenv "PROJECT_ID"))

(def datastore-options (firengine.datastore. project-id service-account-path))

不幸的是，我仍然遇到同样的错误?

Unfortunately, I still get the same error?

    clojure.lang.Compiler$CompilerException: java.lang.reflect.InvocationTargetException, compiling:(state.clj:15:1)
java.lang.reflect.InvocationTargetException: 
         java.lang.IllegalArgumentException: Can't call public method of non-public class: public com.google.cloud.ServiceOptions$Builder com.google.cloud.ServiceOptions$Builder.projectId(java.lang.String)

我真的不会编译 firengine.datastore 吗?

Am I not really aot compiling firengine.datastore?

推荐答案

是的……那个问题.你不会相信它，但它实际上是一个 jdk 中的开放错误来自……等等……1999！

Yeah.... that problem. You wouldnt believe it, but its actually an open bug in the jdk from ... wait for it ... 1999!

您可以在 clojure jira 和 google 群组.

您可能需要制作自己的 java 包装器来避免这种情况，或者 询问图书馆作者 考虑这个古老的已知 java 错误.

You might have to make your own java wrapper to avoid this, or ask the library author to take this old known java bug into consideration.

如果您不想编写自己的 java 包装器，并且作者坚持这是最好的设计，就像永远一样！"，那么您总是可以通过使用 (.setAccessible方法 true) 和一些自定义反射代码..

If you dont want to write your own java wrapper, and the author insists that "this is the best design, like, ever!", then you could always force it by setting the method accessibility with (.setAccessible method true) and some more custom reflection code..

祝你好运！

这篇关于无法调用非公共类的公共方法:public(Google gcloud 库)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！