Chapter 7: Filters

Have lots of ideas and throw away the bad ones. You aren not going to have good ideas unless you have lots of ideas and some sort of principle of selection. —LINUS PAULING In the preceding chapters, the basic selection rule, which lies at the heart of logback-classic, has been presented. In this chapter, additional filtering methods will be introduced. Logback filters are based on ternary logic al

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"We refer to such Java language boolean expressions as "evaluation expressions". Evaluation expressions enable great flexibility in event filtering. JaninoEventEvaluator requires the Janino library."