gradle:将默认端口从5005更改为 [英] gradle: change default port from 5005

问题描述

我想调试一些同时运行的JVM实例.我知道我可以使用--debug-jvm运行gradle，以便JVM将等到我启动IDE调试器后才能连接到JVM，但默认情况下使用端口5005.这对于调试一个JVM实例很好.但是，如果我要调试多个实例，则需要定义一个与5005不同的端口.如何使用gradle实现此目的?

I want to debug some JVM instances that are running at the same time. I know that I can run gradle using --debug-jvm so that the JVM will wait until I start the IDE debugger so that it connects to the JVM but it uses port 5005 by default. That's fine for debugging one instance of JVM... but if I want to debug more than one instance, I'll need to define a different port from 5005. How can I achieve this with gradle?

推荐答案

就我而言，我想调试特定文件，因此在build.gradle中包含了以下代码:

In my case I wanted to debug a specific file, so I included the following code in build.gradle:

task execFile(type: JavaExec) {
    main = mainClass

    classpath = sourceSets.main.runtimeClasspath

    if (System.getProperty('debug', 'false') == 'true') {
        jvmArgs "-Xdebug", "-agentlib:jdwp=transport=dt_socket,address=8787,server=y,suspend=y"
    }

    systemProperties System.getProperties()
}

我可以运行:

gradle execFile -PmainClass=com.MyClass -Dmyprop=somevalue -Ddebug=true

自定义execFile任务收到:

• -PmainClass=com.MyClass:具有要执行的主要方法的类(在脚本中，main = mainClass)
• -Dmyprop=somevalue:一个属性，该属性的值可以在调用System.getProperty("myprop")的应用程序中进行检索(在脚本中，为此需要systemProperties System.getProperties())
• -Ddebug=true:一个用于在端口8787上启用调试的标志(在脚本中，请参见if条件，以及address=8787，但可以更改端口，并且也可以更改此标志名称).使用suspend=y，执行将被挂起，直到调试器连接到端口为止(如果您不希望这种行为，则可以使用suspend=n)

• -PmainClass=com.MyClass: the class with the main method I want to execute (in the script, main = mainClass)
• -Dmyprop=somevalue: a property whose value be retrieved in the application calling System.getProperty("myprop") (in the script, systemProperties System.getProperties() was needed for that)
• -Ddebug=true: a flag to enable debugging on port 8787 (in the script, see the if condition, and also address=8787, but the port could be changed, and this flag name also could be changed). Using suspend=y the execution is suspended until the debugger is attached to the port (if you don't want this behaviour, you could use suspend=n)

对于您的用例，您可以尝试将jvmArgs ...行后面的逻辑应用于特定任务(或使用tasks.withType(JavaExec) { ... }应用于所有此类任务).

For your use case, you could try to apply the logic behind the line jvmArgs ... to your specific task (or use tasks.withType(JavaExec) { ... } to apply to all tasks of this type).

使用此解决方案时，请勿使用--debug-jvm选项，因为您可能会收到有关属性jdwp被定义两次的错误.

Using this solution, don't use the --debug-jvm option because you may receive an error about the property jdwp being defined twice.

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