有没有办法在使用maven-jlink-plugin时添加maven依赖项? [英] Is there a way to add maven dependencies while using the maven-jlink-plugin?

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问题描述

我正在使用 Github项目暴露于Java 9中的新模块化功能。我想为项目添加依赖项,并能够构建本机映像。但是,当我尝试向pom.xml添加新的依赖项,并将requires语句添加到module-info.java时,我从maven-jlink-plugin中收到以下错误:

I'm using this Github project to get exposed to the new modular features in Java 9. I would like to add dependencies to the project and be able to build a native image. However, when I try to add a new dependency to the pom.xml, and add the requires statement to the module-info.java, I get a the following error from the maven-jlink-plugin:

Error: module-info.class not found for joda.time module

我正在尝试使用它作为概念证明,我可以使用新的链接阶段部署图像,但自然我需要能够具有外部依赖性,我需要使用maven (工作约束)。

I'm trying to use this as a proof of concept that I can deploy images using the new linking phase, but naturally I need to be able to have external dependencies and I need to use maven (work constraint).

对mod-jar / pom.xml的更改

Changes to mod-jar/pom.xml

...
 <dependencies>
    <dependency>
      <groupId>joda-time</groupId>
      <artifactId>joda-time</artifactId>
      <version>2.9.9</version>
    </dependency>
  </dependencies>
...

mod-jar / module-info.java

mod-jar/module-info.java

module com.soebes.nine.jar {
  requires java.base;
  requires joda.time;
  exports com.soebes.example.nine.jar;
}

日志:

[INFO] --- maven-jlink-plugin:3.0.0-alpha-1:jlink (default-jlink) @ mod-jlink ---
[INFO] Toolchain in maven-jlink-plugin: jlink [ /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home/bin/jlink ]
[INFO] The following dependencies will be linked into the runtime image:
[INFO]  -> module: com.soebes.nine.one ( /Users/sebastianrestrepo/Projects/jdk9-jlink-jmod-example/maven-example/mod-1/target/jmods/com.soebes.nine.one.jmod )
[INFO]  -> module: com.soebes.nine.two ( /Users/sebastianrestrepo/Projects/jdk9-jlink-jmod-example/maven-example/mod-2/target/jmods/com.soebes.nine.two.jmod )
[INFO]  -> module: com.soebes.nine.jar ( /Users/sebastianrestrepo/Projects/jdk9-jlink-jmod-example/maven-example/mod-jar/target/com.soebes.nine.jar-1.0-SNAPSHOT.jar )
[INFO]  -> module: joda.time ( /Users/sebastianrestrepo/.m2/repository/joda-time/joda-time/2.9.9/joda-time-2.9.9.jar )
[ERROR] 
Error: module-info.class not found for joda.time module
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] parent ............................................. SUCCESS [  1.460 s]
[INFO] com.soebes.nine.one ................................ SUCCESS [  2.022 s]
[INFO] com.soebes.nine.two ................................ SUCCESS [  1.392 s]
[INFO] com.soebes.nine.jar ................................ SUCCESS [  1.388 s]
[INFO] mod-jlink .......................................... FAILURE [  1.061 s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7.911 s
[INFO] Finished at: 2017-11-03T15:27:35-04:00
[INFO] Final Memory: 26M/981M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-jlink-plugin:3.0.0-alpha-1:jlink (default-jlink) on project mod-jlink: 

我真的很感激任何帮助。谢谢。

I would really appreciate any help. Thanks.

推荐答案

这有与我相信的插件没什么关系。模块 joda.time 在您的情况下似乎是自动模块

This has not much to do with the plugin I believe. Module joda.time in your case seems to be an automatic module.

jlink 工具不支持链接自动模块因为它们可以依赖类路径的任意内容,这违背了自我的想法包含Java运行时。

The jlink tool does not support linking of automatic modules because they can rely on the arbitrary content of the classpath, which goes against the idea of a self-contained Java runtime.

所以有两种方法可以解决这个问题: -

So there are two ways to fix this probably :-


  • (你不拥有jar)暂时继续创建 module-info.java [你可以使用 jdeps 工具并更新jar [使用 jar tool],带有相应的编译类,如Java 9中的项目。

  • (you don't own the jar) Temporarily go ahead create a module-info.java[you could use jdeps tool for it] and update the jar[using jar tool] with the corresponding compiled class as in projects under Java 9.

(你拥有依赖项)永久地将jar迁移到Java 9本身,在编译和打包后,它将由 module-info.class 组成。

(you own the dependency) Permanently migrate the jar to Java 9 itself, where it would consist of the module-info.class by itself after being compiled and packaged.

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