JAR Maven项目依赖于远程机器而不依赖于相关性 [英] JAR Maven project with dependencies on remote machine without dependencies

问题描述

我是 Maven 和 Java 的新手。我正试图在远程机器上运行hdfs MapReduce作业。我没有写入/编辑依赖关系文件的权限。我想知道是否可以将 JAR 我的Maven项目传递给我的MapReduce作业。这样我就不需要通过SSH连接到远程机器并改变Maven项目的依赖关系。我将使用包含远程计算机上未包含的所有所需依赖项的JAR来运行我的MapReduce作业。 您可以使用来做到这一点。

将它添加到你的POM并进行相应的配置（看看下面的示例）。
$ b 这会创建一个额外的jar，包含从命令行运行jar所需的所有依赖项，并且将使用要执行的 main（）方法标记该类（再次考虑，这可能是可选的，因为您可以在运行 java -jar 时指定主类。）

这里是（部分）我的MainJooqClass ：

 包sunshine.web.shaker.main; 
 
 //进口
 
 public class MainJooqClass {
 
 public static void main（String [] args）{
 
 // code 
 
} 
 
} 
  

以下是配置插件的POM部分：

 < project xmlns =http：//maven.apache。 org / POM / 4.0.0xmlns：xsi =http://www.w3.org/2001/XMLSchema-instance
 xsi：schemaLocation =http://maven.apache.org/POM/ 4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd\"> 
 
<！ -  ...  - > 
 
< build> 
< plugins> 
 
< plugin> 
< artifactId> maven-assembly-plugin< / artifactId> 
< version> 2.4.1< / version> 
<配置> 
< descriptorRefs> 
< descriptorRef> jar -with-dependencies< / descriptorRef> 
< / descriptorRefs> 
<档案> 
< manifest> 
< mainClass> sunshine.web.shaker.main.MainJooqClass< / mainClass> 
< / manifest> 
< / archive> 
< / configuration> 
<执行次数> 
<执行> 
< id> make-assembly< / id> 
<阶段>包< /阶段> 
<目标> 
< goal>单< / goal> 
< /目标> 
< /执行> 
< /执行次数> 
< / plugin> 
 
< / plugins> 
< / build> 
 
< dependencies /> 
 
< / project> 
  

I am new to Maven and Java. I am trying to run a hdfs MapReduce job on a remote machine. I do not have permissions to write/edit the dependencies file. I was wondering if it was possible to JAR my Maven project and pass it to my MapReduce job. That way I dont need to SSH in to the remote machine and change the maven projects dependencies. I would use the JAR that contained all the needed dependencies that are not included on the remote machine to run my MapReduce job.

解决方案

You can do that with the maven assembly plugin.

Add it to your POM and configure accordingly (have a look at my example below).

This will create an additional jar, that contains all the dependencies needed to run the jar from the command line, and will mark the class with the main() method to be executed (on second thought, this may be optional, as you can specify the main class when running java -jar).

Here's (part of) my MainJooqClass:

package sunshine.web.shaker.main;

// imports

public class MainJooqClass {

    public static void main(String[] args) {

        // code

    }

}

And here's the part of my POM that configures the plugin:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

    <!-- ... -->

    <build>
        <plugins>

            <plugin>
                <artifactId>maven-assembly-plugin</artifactId>
                <version>2.4.1</version>
                <configuration>
                    <descriptorRefs>
                        <descriptorRef>jar-with-dependencies</descriptorRef>
                    </descriptorRefs>
                    <archive>
                        <manifest>
                            <mainClass>sunshine.web.shaker.main.MainJooqClass</mainClass>
                        </manifest>
                    </archive>
                </configuration>
                <executions>
                    <execution>
                        <id>make-assembly</id>
                        <phase>package</phase>
                        <goals>
                            <goal>single</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>

        </plugins>
    </build>

    <dependencies />

</project>

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