Gradle记录输出级别

Question

在我的项目类中,我使用java.util.logging.Logger并在我的代码中添加了各种日志输出,使用各种日志级别,即.

的src /主/爪哇/ Run.java

import java.util.logging.Level;
import java.util.logging.Logger;

public class Run{


    public static void main( String args[] ){
      System.out.println("Hello World");

      logger.log(Level.CONFIG, "Just some config info");
      Logger logger = Logger.getLogger(Run.class.getName());
      logger.log(Level.INFO, "Just logging some info");
      logger.log(Level.FINE, "Fine logging");
      logger.log(Level.FINER, "Finer logging");
      logger.log(Level.WARNING, "This is a warning log!");

    }
}

目前,当我运行gradle -i test所有显示已Level.INFO定义的日志消息但没有输出配置,警告或精细消息时.

我已经尝试更新我的build.gradle文件,以便:

apply plugin: 'java'
apply plugin:'application'
mainClassName = "Run"

repositories {
    mavenCentral()
}

dependencies {
    testCompile "junit:junit:4.11"
}

run{
    systemProperties = ['java.util.logging.config.file' : 'logging.properties']
}

我已经包括:

systemProperties = ['java.util.logging.config.file' : 'logging.properties']

然后创建/src/main/resource/logging.propertiess

handlers= java.util.logging.ConsoleHandler
.level= CONFIG
java.util.logging.ConsoleHandler.level = FINER
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter

运行:

gradle run

我明白了:

:compileJava UP-TO-DATE
:processResources UP-TO-DATE
:classes UP-TO-DATE
:run
Hello World

BUILD SUCCESSFUL

当运行gradle -i run时,我得到:成功启动进程'command'/ Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/bin/java''Hello World:run(Thread [main,5,主要])完成.花了0.202秒.

BUILD SUCCESSFUL

即.没有记录信息.但是,从运行任务中注释掉system.properties并重新运行gradle -i run我得到:

Successfully started process 'command '/Library/Java/JavaVirtualMachines/jdk1.8.0_20.jdk/Contents/Home/bin/java''
Hello World
Nov 05, 2014 12:07:42 PM Run main
INFO: Just logging some info
Nov 05, 2014 12:07:42 PM Run main
WARNING: This is a warning log!
:run (Thread[main,5,main]) completed. Took 0.229 secs.

BUILD SUCCESSFUL

信息和警告级别日志,但不是精细或更精细的日志.

tldr;

如何在通用gradle java项目中获取配置,精细和更精细级别的日志以登录到控制台？

Answer 1

几个选项(我个人更喜欢选项2.2):

1)自定义logging.properties文件:

Java Logging API具有默认的日志记录配置文件<JRE_HOME>/lib/logging.properties.您可以使用自己的配置文件设置JVM属性java.util.logging.config.file.

handlers = java.util.logging.ConsoleHandler

Run.handlers = java.util.logging.ConsoleHandler
Run.level = FINER
Run.useParentHandlers = false

java.util.logging.ConsoleHandler.level = ALL
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter

您必须设置useParentHandlers = false为避免从父处理程序获取重复打印.

1.1)使用绝对路径设置上面的属性

甚至没试过;-)

1.2)按如下方式加载自定义文件 Run.java

加载如下Run.java:

    InputStream inputStream = Run.class.getResourceAsStream("mylogging.properties");
    try {
        LogManager.getLogManager().readConfiguration(inputStream);
    } catch(Exception e) {
        e.printStackTrace();
    }

2)自定义系统属性(即:logLevel)

systemProperty在您的定义中build.gradle:

run {
    systemProperty 'logLevel', System.getProperty('logLevel')
}

添加defaultLogLevel在Run.java:

public static Level defaultLevel = Level.INFO;

获得logLevel财产的价值:

String logLevel = System.getProperty("logLevel");

并在logger中设置定义的级别:

Logger logger = Logger.getLogger(Run.class.getName());
logger.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));

2.1)ConsoleHandler从父处理程序创建一个新的关闭打印

    System.out.println(Run.class.getName());
    Logger logger = Logger.getLogger(Run.class.getName());
    logger.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));

    Handler consoleHandler = new ConsoleHandler();
    consoleHandler.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));
    logger.addHandler(consoleHandler);

    logger.setUseParentHandlers(false);

2.2)查找父ConsoleHandler级并设置定义的级别

    Logger topLogger = Logger.getLogger("");

    Handler consoleHandler = null;
    for (Handler handler : topLogger.getHandlers()) {
        if (handler instanceof ConsoleHandler) {
            //found the console handler
            consoleHandler = handler;
            break;
        }
    }

    if (consoleHandler == null) {
        // not found, create a new one
        consoleHandler = new ConsoleHandler();
        topLogger.addHandler(consoleHandler);
    }
    //set the console handler level
    consoleHandler.setLevel(logLevel.isEmpty() ? defaultLevel : Level.parse(logLevel));

有了它,gradle run产生高于默认级别(INFO)的消息.同

gradle run -DlogLevel=FINE

您可以控制显示哪些消息.