Package org.apache.log4j.spi
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Interface Summary Interface Description Configurator Implemented by classes capable of configuring log4j using a URL.HierarchyEventListener Listen to events occurring within aHierarchy.LoggerFactory Implement this interface to create new instances of Logger or a sub-class of Logger.LoggerRepository ALoggerRepositoryis used to create and retrieveLoggers.OptionHandler  - 
Class Summary Class Description ErrorHandler Created by IntelliJ IDEA.Filter LoggingEvent