如何使用Maven插件将jar部署到Raspberry Pi 2上

2022-11-12 15:11:29

我有一个使用Pi4J的简单java类,它包含一个main方法.我想构建它并将其部署到Raspberry Pi.我在Windows 10上使用java 8,我的IDE是NetBeans 8.1.如果项目设置为普通(非Maven)Java应用程序并设置为通过NetBeans构建配置部署到Raspberry Pi,如图所示here,项目将在jar上构建普通和FTP,然后运行它没有问题.
我想做同样但使用Maven.问题是,正在运行的代码具有C代码的原生代码,而我正在使用的ARM体系结构的Maven插件似乎首先在我的本地盒子上运行jar,其中C代码将崩溃抛出异常

SEVERE: Unable to load [libpi4j.so] using path: [/lib/libpi4j.so]
java.lang.IllegalArgumentException: The path has to be absolute, but found: \lib\libpi4j.so
at com.pi4j.util.NativeLibraryLoader.loadLibraryFromClasspath(NativeLibraryLoader.java:120)
at com.pi4j.util.NativeLibraryLoader.load(NativeLibraryLoader.java:92)
at com.pi4j.wiringpi.Gpio.(Gpio.java:174)
at com.pi4j.io.gpio.RaspiGpioProvider.(RaspiGpioProvider.java:51)
at com.pi4j.io.gpio.GpioFactory.getDefaultProvider(GpioFactory.java:106)
at com.pi4j.io.gpio.impl.GpioControllerImpl.(GpioControllerImpl.java:54)
at com.pi4j.io.gpio.GpioFactory.getInstance(GpioFactory.java:89)
at com.hadronix.pi4jsample2.ControlGpioExample.main(ControlGpioExample.java:24)

Exception in thread “main” java.lang.UnsatisfiedLinkError:
com.pi4j.wiringpi.Gpio.wiringPiSetup()I at
com.pi4j.wiringpi.Gpio.wiringPiSetup(Native Method) at
com.pi4j.io.gpio.RaspiGpioProvider.(RaspiGpioProvider.java:51)
at
com.pi4j.io.gpio.GpioFactory.getDefaultProvider(GpioFactory.java:106)
at
com.pi4j.io.gpio.impl.GpioControllerImpl.(GpioControllerImpl.java:54)
at com.pi4j.io.gpio.GpioFactory.getInstance(GpioFactory.java:89) at
com.hadronix.pi4jsample2.ControlGpioExample.main(ControlGpioExample.java:24)

如果我只是做一个干净的构建,它将构建良好并创建jar.但是,如果我选择运行构建,那么崩溃发生的地方.这是我用来将jar部署到Pi的Maven插件.

<!-- OPTIONALLY DEPLOY THE FINAL JAR TO THE RASPBERRY PI -->
        <plugin>
            <artifactId>maven-antrun-plugin</artifactId>
            <executions>

                <!-- copy the compiled JAR file to the Raspberry Pi platform platform -->
                <execution>
                    <id>ControlGpioExample.jar</id>
                    <phase>install</phase>
                    <goals>
                        <goal>run</goal>
                    </goals>
                    <configuration>
                        <tasks>
                            <taskdef resource="net/sf/antcontrib/antcontrib.properties"
                                     classpathref="maven.plugin.classpath" />
                            <if>
                                <equals arg1="${pi.transfer.dev}" arg2="true" />
                                <then>
                                    <!-- ensure the target directory exists on the Raspberry Pi -->
                                    <sshexec host="${pi.host.dev}" port="${pi.port.dev}" username="${pi.user.dev}"
                                                                                     password="${pi.password.dev}" trust="true" failonerror="false"
                                                                                     verbose="true" command="mkdir --parents ${pi.dirCopyTo.dev}" />
                                    <!-- copy the JAR file to the Raspberry Pi -->
                                    <scp
                                        file="${project.build.directory}/${project.build.finalName}.jar"
                                        todir="${pi.user.dev}:${pi.password.dev}@${pi.host.dev}:${pi.dirCopyTo.dev}"
                                        port="${pi.port.dev}" trust="true" verbose="true" failonerror="true">
                                    </scp>
                                </then>
                            </if>
                        </tasks>
                    </configuration>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>org.apache.ant</groupId>
                    <artifactId>ant-jsch</artifactId>
                    <version>${ant-jsch.version}</version>
                </dependency>
                <dependency>
                    <groupId>com.jcraft</groupId>
                    <artifactId>jsch</artifactId>
                    <version>${jsch.version}</version>
                </dependency>
                <dependency>
                    <groupId>ant-contrib</groupId>
                    <artifactId>ant-contrib</artifactId>
                    <version>${ant-contrib.version}</version>
                </dependency>
            </dependencies>
        </plugin>

我试图弄清楚如何更改此插件,以便不在我的本地计算机上首先执行代码.我只是想让它假设jar是构建的,ssh到远程Pi并复制jar然后在那里运行它.此外,如果有人在使用Maven时有更好的方法,那么我愿意接受建议.任何帮助都会很棒！

这里是我正在使用的作为参考的链接
link 1

提前致谢.

解决方法:

解决：这个pom文件将构建一个Pi4J示例用例的可执行JAR.然后它会将JAR传输到Raspberry Pi然后执行它.在netbeans中,这是通过build命令完成的.所以一个按钮来构建,部署和运行！

我不喜欢的一件事是它将依赖项作为包而不是原始JAR.它还会在构建时创建2个JAR;一个有一个没有依赖.打开罐子,看看可以做些什么来改善结构.随意优化并提供反馈.

此外,为了简单起见,我在这个pom文件中放入了我的RASPBERRY PI PROPERTIES.但是,这些应该位于settings.xml文件中的受控用户主位置或其他位置.

注意：Pi4J具有C代码本机ARM依赖性,这使其无法在非ARM体系结构上运行,必须发送到Pi.

<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>com.company</groupId>
<artifactId>Swarm</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>jar</packaging>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>

    <!-- DEFAULT RASPBERRY PI PROPERTIES -->
    <pi.host>192.168.1.20</pi.host>
    <pi.port>22</pi.port>
    <pi.user>root</pi.user>
    <pi.password>root</pi.password>
    <pi.deployDirectory>/home/pi/artifacts</pi.deployDirectory>
    <pi.main.class>com.company.test.ControlGpioExample</pi.main.class>

</properties>

<dependencies>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>3.8.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.pi4j</groupId>
        <artifactId>pi4j-core</artifactId>
        <version>1.0</version>
    </dependency>
</dependencies>

<build>
    <plugins>

        <!-- This plugin will generate JAR MANIFEST file inside the JAR in order to make our applicationeasily runnable -->
        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <configuration>
                <archive>
                    <manifest>
                        <addClasspath>true</addClasspath>
                        <mainClass>${pi.main.class}</mainClass>
                    </manifest>
                </archive>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
            </configuration>
            <executions>
                <execution>
                    <id>make-my-jar-with-dependencies</id>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>

        <!--This plugin will Transfer the executable JAR file to the Pi and runs it -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>1.8</version>
            <executions>
                <execution>
                    <phase>install</phase>
                    <goals>
                        <goal>run</goal>
                    </goals>
                    <configuration>
                        <tasks>
                            <!-- ensure the target directory exists on the Raspberry Pi -->
                            <sshexec host="${pi.host}" port="${pi.port}" username="${pi.user}" password="${pi.password}" 
                                     trust="true" failonerror="false" verbose="true" 
                                     command="mkdir --parents ${pi.deployDirectory}"/>

                            <!-- copy the JAR file to the Raspberry Pi -->
                            <scp
                                file="${project.build.directory}/${project.build.finalName}-jar-with-dependencies.jar"
                                todir="${pi.user}:${pi.password}@${pi.host}:${pi.deployDirectory}"
                                port="${pi.port}" trust="true" verbose="true" failonerror="true">
                            </scp> 

                            <!-- run the JAR file on the Raspberry Pi -->
                            <sshexec host="${pi.host}" port="${pi.port}" username="${pi.user}"
                                     password="${pi.password}" trust="true" failonerror="false"
                                     verbose="true" 
                                     command="java -jar ${pi.deployDirectory}/${project.build.finalName}-jar-with-dependencies.jar"/>
                        </tasks>
                    </configuration>
                </execution>
            </executions>
            <dependencies>
                <dependency>
                    <groupId>org.apache.ant</groupId>
                    <artifactId>ant-jsch</artifactId>
                    <version>1.9.6</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>
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