We selectively raise this to level ALL for the packages we want to test in the last line.
The default log level is set to INFO in line 2. The latter is useful in continuous builds. In line 1 we configure the log output handlers so that the output is displayed on console and additionally written to a log file. There is a lot in this file, so let’s unpick things bit by bit. In the section that configures the Surefire plug-in, we chose a specific logging configuration file. We use the JaCoCo Maven plug-in to measure code coverage. protected void logTablesScan(final String catalogName, final String schemaName) org.jacoco jacoco-maven-plugin 0.8.3 This example shows a method from Exasol’s Virtual Schema. With the advent of Java 8, the logger class got new instance methods that take lambda expressions as message suppliers.Įverything in such a lambda expression is only evaluated, if that, at log level - or a more detailed one set by the user. More detailed log levels, though, tend to produce a lot of output. Done correctly, log messages on that level and beyond are pretty rare. To understand this, remember that the typical log level set in production environments is INFO. If you’re using loggers that support lambda expressions in log messages such as, you’re rewarded with performance gains if you don’t need to log at the highest level. Saving resources with level-aware log message creation
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