使用 maven-assembly-plugin 创建两个可执行的 jar [英] Creating Two Executable Jars Using maven-assembly-plugin

问题描述

我有一个 Maven 项目，我想从中创建两个可执行的 jar 文件.一个将由用户交互使用，第二个将作为读取前者生成的日志文件的计划作业运行.最后，除了 MANIFEST.MF 文件中的 Main-Class 属性外，我希望这两个 jar 文件是相同的.

I have a Maven project and I want to create two executable jar files from it. One will be used interactively by users and a second will be run as a scheduled job that reads the log files produced by the former. In the end, I would expect the two jar files to be identical except for the Main-Class attribute in the MANIFEST.MF file.

我正在使用 maven-antrun-plugin 创建一个可执行 jar，这似乎工作正常，直到我尝试通过引入 Maven 配置文件来创建第二个 jar 文件.我的 POM 文件的相关部分如下所示:

I am using maven-antrun-plugin to create an executable jar and this seemed to be working fine until I tried to create a second jar file by introducing Maven profiles. The relevant section of my POM file looks like this:

<profiles>
    <profile>
        <id>publisher</id>
        <build>
            <finalName>${project.artifactId}</finalName>
            <plugins>
                ...
                <plugin>
                    <artifactId>maven-assembly-plugin</artifactId>
                    <version>2.4</version>
                    <configuration>
                        <appendAssemblyId>false</appendAssemblyId>
                        <finalName>${project.artifactId}</finalName>
                        <archive>
                            <manifest>
                                <mainClass>fully.qualified.path.Publisher</mainClass>
                            </manifest>
                        </archive>
                        <descriptorRefs>
                            <descriptorRef>jar-with-dependencies</descriptorRef>
                        </descriptorRefs>
                    </configuration>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>single</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>
    <profile>
        <id>logReader</id>
        <build>
            <finalName>${project.artifactId}</finalName>
            <plugins>
                ...
                <plugin>
                    <artifactId>maven-assembly-plugin</artifactId>
                    <version>2.4</version>
                    <configuration>
                        <appendAssemblyId>false</appendAssemblyId>
                        <finalName>${project.artifactId}-logReader</finalName>
                        <archive>
                            <manifest>
                                <mainClass>fully.qualified.path.LogReader</mainClass>
                            </manifest>
                        </archive>
                        <descriptorRefs>
                            <descriptorRef>jar-with-dependencies</descriptorRef>
                        </descriptorRefs>
                    </configuration>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>single</goal>
                            </goals>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>
</profiles>

实际上，两者之间的唯一区别是插件中定义的finalName"和mainClass"元素.

Really, the only difference between the two is the "finalName" and "mainClass" elements as defined within the plugin.

当我尝试在两个配置文件上执行 mvn:package 时(顺便说一下，我使用的是 IntelliJ IDEA)，我得到两个 .jar 文件，但一个是正确的，另一个是不正确的.正确"的包含所有依赖项和有效的 MANIFEST.MF 文件.不正确"的不包含任何依赖项，并且 MANIFEST.MF 文件缺少我需要的Main-Class"属性，以使其可执行.

When I try to execute mvn:package on both profiles (I'm using IntelliJ IDEA, by the way), I get two .jar files, but one is correct and the other is incorrect. The "correct" one contains all the dependencies and a valid MANIFEST.MF file. The "incorrect" one contains no dependencies and the MANIFEST.MF file lacks the "Main-Class" property that I need in order for it to be executable.

我发现，如果我只运行一个或另一个配置文件，它运行良好，但是，如果我尝试同时执行两个配置文件，它就会失败.我的日志中也有以下注释，但我必须承认我并不完全理解他们在说什么:

I have found that if I ever run just one profile or the other, that it works fine but, if I try to execute both profiles at once, it fails. I also get the following notes in my log, but I must admit that I don't completely understand what they are saying:

[INFO] Building jar: .../target/publisher.jar
...
[INFO] Building jar: .../target/publisher-logReader.jar
[WARNING] Configuration options: 'appendAssemblyId' is set to false, and 'classifier' is missing.
Instead of attaching the assembly file: .../target/publisher-logReader.jar, it will become the file for main project artifact.
NOTE: If multiple descriptors or descriptor-formats are provided for this project, the value of this file will be non-deterministic!
[WARNING] Replacing pre-existing project main-artifact file: .../target/publisher.jar with assembly file: .../target/publisher-logReader.jar

对此有什么想法吗?是否有可能以这种方式使用单个 mvn:package 生成两个 jar 文件，或者我在吠错树?

Any thoughts about this? Is it possible to produce two jar files with a single mvn:package in this way, or am I barking up the wrong tree?

谢谢！

推荐答案

所以当我发布这个的时候，我发现了这个线程:

So as soon as I posted this, I found this thread:

创建来自单个 Maven 项目的多个可运行的 jar(包括依赖项)

这使用了不同的方法，因为它不使用两个配置文件，而是使用两次执行，例如:

This uses a different approach in that it doesn't use two profiles, it uses two executions, as such:

<plugin>
    <artifactId>maven-assembly-plugin</artifactId>
    <version>2.4</version>
    <executions>
        <execution>
            <id>build-publisher</id>
            <configuration>
                <appendAssemblyId>false</appendAssemblyId>
                <archive>
                    <manifest>
                        <mainClass>fully.qualified.path.Publisher</mainClass>
                    </manifest>
                </archive>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
                <finalName>${project.artifactId}</finalName>
            </configuration>
            <phase>package</phase>
            <goals>
                <goal>single</goal>
            </goals>
        </execution>
        <execution>
            <id>build-logReader</id>
            <configuration>
                <appendAssemblyId>false</appendAssemblyId>
                <archive>
                    <manifest>
                        <mainClass>fully.qualified.path.LogReader</mainClass>
                    </manifest>
                </archive>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
                <finalName>${project.artifactId}-logReader</finalName>
            </configuration>
            <phase>package</phase>
            <goals>
                <goal>single</goal>
            </goals>
        </execution>
    </executions>
</plugin>

这似乎奏效了.这个故事的寓意似乎是我不完​​全了解配置文件或何时应该使用它们.

This seems to be working. The moral of the story seems to be that I don't completely understand profiles or when they should be used.

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