| Package | Description | 
|---|---|
| org.apache.solr.core | Core classes implementing Solr internals and the management of  SolrCores | 
| org.apache.solr.logging | APIs related to capturing log event info in the  LoggingHandler | 
| org.apache.solr.logging.jul | JUL based implementation of  LogWatcher | 
| org.apache.solr.logging.log4j2 | LOG4J2 based implementation of  LogWatcher | 
| Class and Description | 
|---|
| LogWatcher A Class to monitor Logging events and hold N events in memory
 
 This is abstract so we can support both JUL and Log4j2 (and other logging platforms) | 
| LogWatcherConfig Defines the configuration of a  LogWatcher | 
| Class and Description | 
|---|
| CircularList FIFO Circular List. | 
| ListenerConfig | 
| LoggerInfo Wrapper class for Logger implementations | 
| LogWatcher A Class to monitor Logging events and hold N events in memory
 
 This is abstract so we can support both JUL and Log4j2 (and other logging platforms) | 
| LogWatcherConfig Defines the configuration of a  LogWatcher | 
| Class and Description | 
|---|
| ListenerConfig | 
| LoggerInfo Wrapper class for Logger implementations | 
| LogWatcher A Class to monitor Logging events and hold N events in memory
 
 This is abstract so we can support both JUL and Log4j2 (and other logging platforms) | 
| Class and Description | 
|---|
| ListenerConfig | 
| LoggerInfo Wrapper class for Logger implementations | 
| LogWatcher A Class to monitor Logging events and hold N events in memory
 
 This is abstract so we can support both JUL and Log4j2 (and other logging platforms) | 
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