org.apache.samza.logging.log4j
Class JmxAppender

java.lang.Object
  org.apache.log4j.AppenderSkeleton
      org.apache.samza.logging.log4j.JmxAppender

All Implemented Interfaces:

org.apache.log4j.Appender, org.apache.log4j.spi.OptionHandler

public class JmxAppender
extends org.apache.log4j.AppenderSkeleton

JmxAppender is a simple class that exposes Log4J's getLevel and setLevel APIs through a JMX MBean. To enable this MBean, simply include the appender in log4j.xml:

<appender name="jmx" class="org.apache.samza.logging.log4j.JmxAppender"/>

And then enable it as a root logger:

<root> <!-- ...other stuff... --> <appender-ref ref="jmx" /> </root>

Nested Class Summary

static class	JmxAppender.JmxLog4J An implementation of JmxLog4JMBean that calls getLevel and setLevel on the root logger.
static interface	JmxAppender.JmxLog4JMBean An MBean to expose Log4J's getLevel and setLevel APIs.

Field Summary

static java.lang.String	JMX_OBJECT_DOMAIN
static java.lang.String	JMX_OBJECT_NAME
static java.lang.String	JMX_OBJECT_TYPE

Fields inherited from class org.apache.log4j.AppenderSkeleton

closed, errorHandler, headFilter, layout, name, tailFilter, threshold

Constructor Summary

JmxAppender()

JmxAppender(javax.management.MBeanServer mbeanServer)
Calling the default constructor causes this appender to register JmxLog4J as a JMX MBean.

Method Summary

protected void	append(org.apache.log4j.spi.LoggingEvent event)
void	close()
boolean	requiresLayout()

Methods inherited from class org.apache.log4j.AppenderSkeleton

activateOptions, addFilter, clearFilters, doAppend, finalize, getErrorHandler, getFilter, getFirstFilter, getLayout, getName, getThreshold, isAsSevereAsThreshold, setErrorHandler, setLayout, setName, setThreshold

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

JMX_OBJECT_DOMAIN

public static final java.lang.String JMX_OBJECT_DOMAIN

JMX_OBJECT_TYPE

public static final java.lang.String JMX_OBJECT_TYPE

See Also:

Constant Field Values

JMX_OBJECT_NAME

public static final java.lang.String JMX_OBJECT_NAME

See Also:

Constant Field Values

Constructor Detail

JmxAppender

public JmxAppender()

JmxAppender

public JmxAppender(javax.management.MBeanServer mbeanServer)

Calling the default constructor causes this appender to register JmxLog4J as a JMX MBean.

Parameters:

mbeanServer - to be injected for unit testing.

Method Detail

close

public void close()

requiresLayout

public boolean requiresLayout()

append

protected void append(org.apache.log4j.spi.LoggingEvent event)

Specified by:

append in class org.apache.log4j.AppenderSkeleton