Very simple log4j2 XML configuration file using Console and File appender

Question

I d like a very simple XML configuration file with a console and a file appender using log4j2    The Apache Website is killing me with much Information

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lt  xml version  1 0  encoding  UTF-8   gt   lt Configuration status  INFO  gt       lt Appenders gt           lt Console name  Console  target  SYSTEM OUT  gt               lt PatternLayout pattern   d HH mm ss SSS    t   -5level  logger 36  -  msg n    gt           lt  Console gt           lt File name  MyFile  fileName  all log  immediateFlush  false  append  false  gt               lt PatternLayout pattern   d yyy-MM-dd HH mm ss SSS    t   -5level  logger 36  -  msg n   gt           lt  File gt       lt  Appenders gt       lt Loggers gt           lt Root level  debug  gt               lt AppenderRef ref  Console    gt               lt AppenderRef ref  MyFile   gt           lt  Root gt       lt  Loggers gt   lt  Configuration gt    Notes    Put the following content in your configuration file  Name the configuration file log4j2 xml Put the log4j2 xml in a folder which is in the class-path  i e  your source folder  src   Use Logger logger   LogManager getLogger    to initialize your logger I did set the immediateFlush  false  since this is better for SSD lifetime  If you need the log right away in your log-file remove the parameter or set it to true

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log4j2 has a very flexible configuration system  which IMHO is more a distraction than a help   you can even use JSON  See https   logging apache org log4j 2 x manual configuration html for a reference    Personally  I just recently started using log4j2  but I m tending toward the  strict XML  configuration  that is  using attributes instead of element names   which can be schema-validated   Here is my simple example using autoconfiguration and strict mode  using a  Property  for setting the filename    lt  xml version  1 0  encoding  UTF-8   gt   lt Configuration monitorinterval  30  status  info  strict  true  gt       lt Properties gt           lt Property name  filename  gt log CelsiusConverter log lt  Property gt       lt  Properties gt       lt Appenders gt           lt Appender type  Console  name  Console  gt               lt Layout type  PatternLayout  pattern   d  p   t   m n    gt           lt  Appender gt           lt Appender type  Console  name  FLOW  gt               lt Layout type  PatternLayout  pattern   C 1   M  m  ex n    gt           lt  Appender gt           lt Appender type  File  name  File  fileName    filename   gt               lt Layout type  PatternLayout  pattern   d  p  C 1     t   m n    gt           lt  Appender gt       lt  Appenders gt       lt Loggers gt           lt Root level  debug  gt               lt AppenderRef ref  File    gt               lt AppenderRef ref  Console    gt               lt  -- Use FLOW to trace down exact method sending the msg -- gt               lt  --  lt AppenderRef ref  FLOW    gt  -- gt           lt  Root gt       lt  Loggers gt   lt  Configuration gt

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Here is my simplistic log4j2 xml that prints to console and writes to a daily rolling file      java private static final Logger LOGGER   LogManager getLogger MyClass class        log4j2 xml  lt  xml version  1 0  encoding  UTF-8   gt   lt Configuration status  WARN  gt       lt Properties gt           lt Property name  logPath  gt target cucumber-logs lt  Property gt           lt Property name  rollingFileName  gt cucumber lt  Property gt       lt  Properties gt       lt Appenders gt           lt Console name  console  target  SYSTEM OUT  gt               lt PatternLayout pattern    highlight  -5level    d DEFAULT   c 1   M   -  msg n throwable short lineNumber     gt           lt  Console gt           lt RollingFile name  rollingFile  fileName    logPath    rollingFileName  log  filePattern    logPath    rollingFileName   d yyyy-MM-dd  log  gt               lt PatternLayout pattern    highlight  -5level    d DEFAULT   c 1   M   -  msg n throwable short lineNumber     gt               lt Policies gt                   lt  -- Causes a rollover if the log file is older than the current JVM s start time -- gt                   lt OnStartupTriggeringPolicy   gt                   lt  -- Causes a rollover once the date time pattern no longer applies to the active file -- gt                   lt TimeBasedTriggeringPolicy interval  1  modulate  true    gt               lt  Policies gt           lt  RollingFile gt       lt  Appenders gt       lt Loggers gt           lt Root level  DEBUG  additivity  false  gt               lt AppenderRef ref  console    gt               lt AppenderRef ref  rollingFile    gt           lt  Root gt       lt  Loggers gt   lt  Configuration gt       TimeBasedTriggeringPolicy      interval  integer  - How often a rollover should occur based on the   most specific time unit in the date pattern  For example  with a date   pattern with hours as the most specific item and and increment of 4   rollovers would occur every 4 hours  The default value is 1       modulate  boolean  - Indicates whether the interval should be adjusted   to cause the next rollover to occur on the interval boundary  For   example  if the item is hours  the current hour is 3 am and the   interval is 4 then the first rollover will occur at 4 am and then next   ones will occur at 8 am  noon  4pm  etc       Source  https   logging apache org log4j 2 x manual appenders html   Output    INFO   2018-07-21 12 03 47 412 ScenarioHook beforeScenario   - Browser CHROME32 NOHEAD  INFO   2018-07-21 12 03 48 623 ScenarioHook beforeScenario   - Screen Resolution  WxH  1366x768  DEBUG  2018-07-21 12 03 52 125 HomePageNavigationSteps I Am At The Home Page   - Base URL http   simplydo com projector   DEBUG  2018-07-21 12 03 52 700 NetIncomeProjectorSteps I Enter My Start Balance   - Start Balance 348000   A new log file will be created daily with previous day automatically renamed to   cucumber yyyy-MM-dd log  In a Maven project  you would put the log4j2 xml in src main resources or src test resources

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There are excellent answers  but if you want to color your console logs you can use the pattern    lt PatternLayout pattern  quot  style  date DEFAULT   yellow                t   highlight  -5level  FATAL bg red  ERROR red  WARN yellow  INFO green   logger 36  -  message n quot   gt   The full log4j2 file is   lt  xml version  quot 1 0 quot  encoding  quot UTF-8 quot   gt   lt Configuration status  quot WARN quot  gt       lt Properties gt           lt Property name  quot APP LOG ROOT quot  gt  opt test log lt  Property gt       lt  Properties gt       lt Appenders gt           lt Console name  quot ConsoleAppender quot  target  quot SYSTEM OUT quot  gt               lt PatternLayout pattern  quot  style  date DEFAULT   yellow                    t   highlight  -5level  FATAL bg red  ERROR red  WARN yellow  INFO green   logger 36  -  message n quot   gt           lt  Console gt           lt RollingFile name  quot XML ROLLING FILE APPENDER quot                       fileName  quot   APP LOG ROOT  appName log quot                       filePattern  quot   APP LOG ROOT  appName- d yyyy-MM-dd - i log gz quot  gt               lt PatternLayout pattern  quot  d DEFAULT    t   -5level  logger 36  -  msg n quot   gt               lt Policies gt                   lt SizeBasedTriggeringPolicy size  quot 19500KB quot   gt               lt  Policies gt           lt  RollingFile gt       lt  Appenders gt       lt Loggers gt           lt Root level  quot error quot  gt               lt AppenderRef ref  quot ConsoleAppender quot   gt           lt  Root gt           lt Logger name  quot com compName projectName quot  level  quot debug quot  gt               lt AppenderRef ref  quot XML ROLLING FILE APPENDER quot   gt           lt  Logger gt       lt  Loggers gt   lt  Configuration gt   And the logs will look like this

[xml] Very simple log4j2 XML configuration file using Console and File appender

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