java - Gradle 任务缺少 jar 文件的主类

Question

我一直在尝试使用 JavaExec 类型的任务来执行 jar 文件 ssr.runner、jar。但是 gradle 给了我没有指定主类的错误。我是 gradle 新手，所以如果有人能详细说明一下，那就太好了。这是我写的任务:

task executeSqlScriptRunnerBeforeTenantCreation(type:JavaExec) {
    description "Execute ssr.runner to install certificates into the device"
    doLast {
        if(scriptRunnerVariables.get('SSR_INTERSECT_MOCK') == 'true') {

            println "Executing SQL Script Runner..."
            println "Adding certificates for mocked intersect service"

            if(scriptRunnerVariables.get('SSR_DB_TYPE') == 'SQL_SERVER') {
                classpath =  file("{$workingDir}\\ssr.runner.jar")
                main =  '-jar' 
                args '-dbtype', "${scriptRunnerVariables.get('SSR_DB_TYPE')}", '-dbhost', "${scriptRunnerVariables.get('SSR_DB_HOST')}", '-dbinstance', 
                "${scriptRunnerVariables.get('SSR_DB_INSTANCE')}", '-dbname', "${scriptRunnerVariables.get('SSR_DB_NAME')}", '-dbuser', "${scriptRunnerVariables.get('SSR_DB_USER')}",
                '-dbpass', "${scriptRunnerVariables.get('SSR_DB_PASS')}", '-sqlscriptpath', "${scriptRunnerVariables.get('SSR_INTERSECT_MOCK_DB_SCRIPT')}"  
            }    
        }
    }
}

Answer 1

首先，您要混合两个阶段:执行和配置。无需为预定义任务添加 doLast。请参阅here 。那么(可能)脚本应该是这样的:

task executeSqlScriptRunnerBeforeTenantCreation(type:JavaExec) {
    description "Execute ssr.runner to install certificates into the device"

    if(scriptRunnerVariables.get('SSR_INTERSECT_MOCK') == 'true') {
        println "Configuring SQL Script Runner..."
        println "Adding certificates for mocked intersect service"

        if(scriptRunnerVariables.get('SSR_DB_TYPE') == 'SQL_SERVER') {
            main = '<FULLY QUALIFIED NAME OF CLASS YOU NEED TO RUN>' 
            classpath =  file("{$workingDir}\\ssr.runner.jar")            
            args '-dbtype', 
                 "${scriptRunnerVariables.get('SSR_DB_TYPE')}", 
                 '-dbhost', 
                 "${scriptRunnerVariables.get('SSR_DB_HOST')}", 
                 '-dbinstance', 
                 "${scriptRunnerVariables.get('SSR_DB_INSTANCE')}", 
                 '-dbname', 
                 "${scriptRunnerVariables.get('SSR_DB_NAME')}", 
                 '-dbuser', 
                 "${scriptRunnerVariables.get('SSR_DB_USER')}",
                 '-dbpass', 
                 "${scriptRunnerVariables.get('SSR_DB_PASS')}", 
                 '-sqlscriptpath', 
                 "${scriptRunnerVariables.get('SSR_INTERSECT_MOCK_DB_SCRIPT')}"  
            }
        }
    }
}

main 配置错误，应该有一个您需要运行的 java 类的完全限定(带包)名称。当然，configuration中通过classpath、main、args等配置什么仅当 if block 中的两个表达式计算结果为 true 时，em> 阶段才会在执行阶段运行。