Gradle –多个启动脚本示例

很少有build.gradle示例向您展示如何创建多个启动脚本或可执行Java应用程序。

1.单启动脚本

1.1在Gradle中，您可以使用应用程序插件来创建可执行的Java应用程序：

apply plugin: 'application'

mainClassName = "com.mkyong.analyzer.run.threads.MainRunApp"

applicationName = 'mainApp'

applicationDefaultJvmArgs = ["-Xms512m", "-Xmx1024m"]

1.2使用gradle distZip命令创建可执行Java应用程序。

$ gradle :analyzer:distZip

:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:jar UP-TO-DATE
:startScripts
:distZip

1.3将在$project/build/distributions/xxx.zip创建一个zip文件。

$project/build/distributions/project.zip
--- mainApp     #*nix	  -> com.mkyong.analyzer.run.threads.MainRunApp
--- mainApp.bat #windows	-> com.mkyong.analyzer.run.threads.MainRunApp

PS或者，尝试gradle distTar创建一个Tar文件。

2.多个启动脚本

2.1要创建多个启动脚本，请创建一个自定义的CreateStartScripts类型：

apply plugin: 'application'

mainClassName = "com.mkyong.analyzer.run.threads.MainRunApp"

applicationName = 'mainApp'

applicationDefaultJvmArgs = ["-Xms512m", "-Xmx1024m"]

task createExtraRunApp(type: CreateStartScripts) {
    mainClassName = "com.mkyong.analyzer.run.UpdateHostingExtraRunApp"
    classpath = startScripts.classpath
    outputDir = startScripts.outputDir
    applicationName = 'hostingExtraApp'
    defaultJvmOpts = ["-Xms1024m", "-Xmx2048m"]
}

applicationDistribution.into("bin") {
    duplicatesStrategy= DuplicatesStrategy.EXCLUDE
    from(createExtraRunApp)
    fileMode = 0755
}

2.2该脚本将创建两个可执行的Java应用程序：

$project/build/distributions/project.zip
---mainApp    			-> com.mkyong.analyzer.run.threads.MainRunApp	 
---mainApp.bat			-> com.mkyong.analyzer.run.threads.MainRunApp
---hostingExtraApp		-> com.mkyong.analyzer.run.UpdateHostingExtraRunApp
---hostingExtraApp.bat	-> com.mkyong.analyzer.run.UpdateHostingExtraRunApp

3.多个启动脚本–再次

3.1这个build.gradle在我的项目中使用，它创建了三个可执行的Java应用程序：

apply plugin: 'application'
mainClassName = "com.hostingcompass.analyzer.run.threads.HydraRunApp"
applicationName = 'hydra'

applicationDefaultJvmArgs = ["-Dlogback.configurationFile=MY_APP_HOME/logback-hydra.xml",
                             "-Dconfig=MY_APP_HOME/config.properties", 
							"-Djava.net.preferIPv4Stack=true", "-Dapp.home=MY_APP_HOME/", "-Xms512m", "-Xmx1024m"]

startScripts {
    doLast {
        unixScript.text = unixScript.text.replace('MY_APP_HOME', '\$APP_HOME')
        windowsScript.text = windowsScript.text.replace('MY_APP_HOME', '%~dp0..')
    }
}

task updateHostingExtraRunApp(type: CreateStartScripts) {
    mainClassName = "com.hostingcompass.analyzer.run.UpdateHostingExtraRunApp"
    classpath = startScripts.classpath
    outputDir = startScripts.outputDir
    applicationName = 'hostingExtra'
    defaultJvmOpts = ["-Dlogback.configurationFile=MY_APP_HOME/logback-hosting-extra.xml",
                      "-Dconfig=MY_APP_HOME/config.properties", "-Dapp.home=MY_APP_HOME/", "-Xms512m", "-Xmx1024m"]

    updateHostingExtraRunApp {
        doLast {
            unixScript.text = unixScript.text.replace('MY_APP_HOME', '\$APP_HOME')
            windowsScript.text = windowsScript.text.replace('MY_APP_HOME', '%~dp0..')
        }
    }
}

task updateWhoisExtraRunApp(type: CreateStartScripts) {
    mainClassName = "com.hostingcompass.analyzer.run.UpdateWhoisExtraRunApp"
    classpath = startScripts.classpath
    outputDir = startScripts.outputDir
    applicationName = 'whoisExtra'
    defaultJvmOpts = ["-Dlogback.configurationFile=MY_APP_HOME/logback-whois-extra.xml",
                      "-Dconfig=MY_APP_HOME/config.properties", "-Dapp.home=MY_APP_HOME/", "-Xms512m", "-Xmx1024m"]

    updateWhoisExtraRunApp {
        doLast {
            unixScript.text = unixScript.text.replace('MY_APP_HOME', '\$APP_HOME')
            windowsScript.text = windowsScript.text.replace('MY_APP_HOME', '%~dp0..')
        }
    }
}

applicationDistribution.into("bin") {
    duplicatesStrategy= DuplicatesStrategy.EXCLUDE
    from(updateHostingExtraRunApp)
    from(updateWhoisExtraRunApp)
    fileMode = 0755
}

distZip {
    archiveName 'analyzer.zip'
}

3.2输出

$project/build/distributions/analyzer.zip
---hydra
---hydra.bat 
---hostingExtra
---hostingExtra.bat
---whoisExtra
---whoisExtra.bat

注意
记住要声明排除duplicatesStrategy以避免重复的启动脚本。

applicationDistribution.into("bin") {
    duplicatesStrategy= DuplicatesStrategy.EXCLUDE
    from(updateHostingExtraRunApp)
    from(updateWhoisExtraRunApp)
    fileMode = 0755
}

参考文献

1. Gradle –应用程序插件
2. Gradle应用程序插件– APP_HOME

翻译自: https://mkyong.com/gradle/gradle-multiple-start-script-examples/