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
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Properties>
<Property name="logPath">target/cucumber-logs</Property>
<Property name="rollingFileName">cucumber</Property>
</Properties>
<Appenders>
<Console name="console" target="SYSTEM_OUT">
<PatternLayout pattern="[%highlight{%-5level}] %d{DEFAULT} %c{1}.%M() - %msg%n%throwable{short.lineNumber}" />
</Console>
<RollingFile name="rollingFile" fileName="${logPath}/${rollingFileName}.log" filePattern="${logPath}/${rollingFileName}_%d{yyyy-MM-dd}.log">
<PatternLayout pattern="[%highlight{%-5level}] %d{DEFAULT} %c{1}.%M() - %msg%n%throwable{short.lineNumber}" />
<Policies>
<!-- Causes a rollover if the log file is older than the current JVM's start time -->
<OnStartupTriggeringPolicy />
<!-- Causes a rollover once the date/time pattern no longer applies to the active file -->
<TimeBasedTriggeringPolicy interval="1" modulate="true" />
</Policies>
</RollingFile>
</Appenders>
<Loggers>
<Root level="DEBUG" additivity="false">
<AppenderRef ref="console" />
<AppenderRef ref="rollingFile" />
</Root>
</Loggers>
</Configuration>
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
.