Apache Logging Services

Tuesday October 11, 2016

A few more details about Apache Log4j 2.7

log4j-logo-2-7

Apache Log4j 2.7 is now out on a href="https://search.maven.org/#search%7Cga%7C1%7Cg%3A%22org.apache.logging.log4j%22">Maven Central. Here’s are the highlights.

What's new since 2.6.2

  • The RoutingAppender can be configured with scripts.
  • A new Appender, the ScriptAppenderSelector can create another Appender as specified by a Script.
  • Users can now inject context data from other sources than ThreadContext. Values can be any Object, not just Strings.
  • The SocketAppender now supports IO buffering.
  • Added the ability to generate Log4j 2 XML configuration file from a ConfigurationBuilder.
  • Hello Scala! We've added Logging APIs for Scala 2.10 and 2.11.
  • Added options to exclude stack trace from JSON, XML and YAML layouts.
  • Added Core API Configurator.shutdown(LoggerContext, long, TimeUnit).
  • FileAppender and RollingFileAppender can create files on-demand.
  • PatternLayout added a color ANSI option to %message and %xThrowable.
  • org.apache.logging.log4j.core.LoggerContext now implements Closeable.
  • Add ThreadContextMap2 interface supporting method putAll(Map<String, String>).
  • Add JUnit Rule implementations to manage the thread context.
  • The Core AbstractConfiguration and AbstractManager now track its LoggerContext; add Configuration.getLoggerContext().

Continuing the Asynchronous Epic

  • We've added support for java.util.concurrent.LinkedTransferQueue to the AsyncAppender.
  • Added optional support for the Conversant DisruptorBlockingQueue in AsyncAppender.
  • Added optional support for JCTools MPSC bounded lock-free queue in AsyncAppender.

Continuing the GC-free Epic

  • Continuing the GC-free epic, we've added support for garbage-free ThreadContext map. This is disabled by default, and users need to enable this explicitly.
  • Also in GC-free-land, we changed LogEvent's internal data structure for context data to be garbage-free. We added the method LogEvent#getContextData() and deprecated getContextMap().

Continuing the Builder Epic

  • Added Builders for the ConsoleAppender, FileAppenderRoutingAppenderSocketAppender, and ServletAppender (and deprecated factory methods).
  • Builders can be generic.
  • Builder can subclass another Builder.

And bug fixes as well, for which you can just see the Log4j site.

Happy Log4j Logging!
Gary Gregory

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