how to package all dependencies into a jar package and deploy the jar package successfully to an offline machine which without ai.djl cache file?

[Black200000]

@frankfliu

如何把所有依赖项都打入jar包中，将jar包成功部署到离线且无ai.djl缓存文件的机器中？

我现在只能通过提前拷贝ai.djl缓存文件的方式将所需依赖拷贝进离线机器中，请问还有更好的方法吗？求解答

项目地址: https://github.com/Black200000/DJLOfflineProblem.git

为了方便测试，以下是我在windows上的实验的内容

我有两台Win10笔记本电脑A和B，做了如下实验，以下是电脑A和B的信息
OS: Win10
java version: "1.8.0_341"

首先在电脑A上执行如下命令，
mvn package
将生成DJLOfflineProblem-win.jar包和model文件夹拷贝到电脑B中

电脑B无网络连接，执行如下运行命令 
java -jar DJLOfflineProblem-win.jar -Doffline=true

可以观察到无网络连接的电脑B的 C:\Users\Test 目录下生成.djl.ai文件夹，.djl.ai下包含pytorch\1.13.1-20221220-cpu-win-x86_64子文件夹

报错信息如下

Loading:     100% |========================================|

Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

Caused by: ai.djl.engine.EngineException: Cannot download jni files: https://publish.djl.ai/pytorch/1.13.1/jnilib/0.21.0/win-x86_64/cpu/djl_torch.dll
at ai.djl.pytorch.jni.LibUtils.downloadJniLib(LibUtils.java:507)
at ai.djl.pytorch.jni.LibUtils.findJniLibrary(LibUtils.java:248)
at ai.djl.pytorch.jni.LibUtils.loadLibrary(LibUtils.java:80)

....

我将电脑B中的1.13.1-20221220-cpu-win-x86_64文件夹
删除，将电脑A中的1.13.1-20221220-cpu-win-x86_64文件夹拷贝进电脑B中，电脑B在离线情况下可运行jar包

[frankfliu]

The best way is to create a fatjar use maven shade. The limitation is you have to package one jar for each platform:

If you want to package windows jar, you can use the following pom.xml

show pom.xml

<?xml version="1.0" encoding="UTF-8"?>

<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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>DJLOfflineProblem</artifactId>
    <version>arm64</version>
    <name>DJLOfflineProblem</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.7</maven.compiler.source>
        <maven.compiler.target>1.7</maven.compiler.target>
    </properties>

    <dependencies>
        <!--arm64-->
        <dependency>
            <groupId>ai.djl.pytorch</groupId>
            <artifactId>pytorch-native-cpu</artifactId>
            <classifier>win-x86_64</classifier>
            <scope>runtime</scope>
            <version>1.13.1</version>
        </dependency>
        <dependency>
            <groupId>ai.djl.pytorch</groupId>
            <artifactId>pytorch-jni</artifactId>
            <version>1.13.1-0.22.1</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>ai.djl</groupId>
            <artifactId>api</artifactId>
            <version>0.21.0</version>
        </dependency>
        <dependency>
            <groupId>ai.djl.pytorch</groupId>
            <artifactId>pytorch-engine</artifactId>
            <version>0.21.0</version>
            <scope>runtime</scope>
        </dependency>
        <!--pytorch结束-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.83</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.24</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-nop</artifactId>
            <version>1.7.2</version>
            <type>jar</type>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <version>3.2.2</version>
                <configuration>
                    <archive>
                        <manifest>
                            <addClasspath>true</addClasspath>
                            <mainClass>org.example.Final</mainClass> <!-- 此处为主入口-->
                        </manifest>
                    </archive>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.6.12</version>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <configuration>
                    <transformers>
                        <transformer
                                implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                    </transformers>
                </configuration>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>