如何更改根日志记录级别编程如何更改根日志记录级别编程(How to change root logg

我有以下logback.xml文件：

<configuration debug="true"> 

<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender"> 
<encoder>
  <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>

<root level="debug">
  <appender-ref ref="STDOUT" />
</root>
</configuration>

现在，在特定事件的发生，我想以编程方式更改根记录器从调试到错误的水平。 我不能使用变量替换，它是强制性的，我这样做的代码中。

怎么做到呢 ？ 谢谢。

Answer 1:

试试这个：

import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;

Logger root = (Logger)LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
root.setLevel(Level.INFO);

请注意，您也可以告诉的logback定期扫描您的配置文件是这样的：

<configuration scan="true" scanPeriod="30 seconds" > 
  ...
</configuration> 

Answer 2:

我假设你正在使用的logback（从配置文件）。

从的logback手册 ，我看

Logger rootLogger = LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);

或许，这可以帮助你改变的价值？

Answer 3:

使用的logback 1.1.3我不得不做以下（Scala代码）：

import ch.qos.logback.classic.Logger
import org.slf4j.LoggerFactory    
...
val root: Logger = LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME).asInstanceOf[Logger]

Answer 4:

正如其他人所指出的，你只需创建mockAppender ，然后创建一个LoggingEvent基本上监听注册/内发生的日志事件实例mockAppender 。

这里是如何看起来像测试：

import org.slf4j.LoggerFactory;
import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.Logger;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.classic.spi.LoggingEvent;
import ch.qos.logback.core.Appender;

@RunWith(MockitoJUnitRunner.class)
public class TestLogEvent {

// your Logger
private Logger log = (Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);

// here we mock the appender
@Mock
private Appender<ILoggingEvent> mockAppender;

// Captor is generic-ised with ch.qos.logback.classic.spi.LoggingEvent
@Captor
private ArgumentCaptor<LoggingEvent> captorLoggingEvent;

/**
 * set up the test, runs before each test
 */
@Before
public void setUp() {
    log.addAppender(mockAppender);
}

/**
 * Always have this teardown otherwise we can stuff up our expectations. 
 * Besides, it's good coding practise
 */
@After
public void teardown() {
    log.detachAppender(mockAppender);
}


// Assuming this is your method
public void yourMethod() {
    log.info("hello world");
}

@Test
public void testYourLoggingEvent() {

    //invoke your method
    yourMethod();

    // now verify our logging interaction
    // essentially appending the event to mockAppender
    verify(mockAppender, times(1)).doAppend(captorLoggingEvent.capture());

    // Having a generic captor means we don't need to cast
    final LoggingEvent loggingEvent = captorLoggingEvent.getValue();

    // verify that info log level is called
    assertThat(loggingEvent.getLevel(), is(Level.INFO));

    // Check the message being logged is correct
    assertThat(loggingEvent.getFormattedMessage(), containsString("hello world"));
}
}

Answer 5:

我认为你可以使用MDC以编程方式更改日志记录级别。 下面的代码是改变当前线程记录级别的例子。 这种方法不会产生依赖性的logback实现（SLF4J API包含MDC）。

<configuration>
  <turboFilter class="ch.qos.logback.classic.turbo.DynamicThresholdFilter">
    <Key>LOG_LEVEL</Key>
    <DefaultThreshold>DEBUG</DefaultThreshold>
    <MDCValueLevelPair>
      <value>TRACE</value>
      <level>TRACE</level>
    </MDCValueLevelPair>
    <MDCValueLevelPair>
      <value>DEBUG</value>
      <level>DEBUG</level>
    </MDCValueLevelPair>
    <MDCValueLevelPair>
      <value>INFO</value>
      <level>INFO</level>
    </MDCValueLevelPair>
    <MDCValueLevelPair>
      <value>WARN</value>
      <level>WARN</level>
    </MDCValueLevelPair>
    <MDCValueLevelPair>
      <value>ERROR</value>
      <level>ERROR</level>
    </MDCValueLevelPair>
  </turboFilter>
  ......
</configuration>

MDC.put("LOG_LEVEL", "INFO");

Answer 6:

我似乎有做成功

org.jboss.logmanager.Logger logger = org.jboss.logmanager.Logger.getLogger("");
logger.setLevel(java.util.logging.Level.ALL);

然后从网状获得详细的日志记录，下面已经做了

org.slf4j.impl.SimpleLogger.setLevel(org.slf4j.impl.SimpleLogger.TRACE);

文章来源: How to change root logging level programmatically