Package org.apache.solr.logging

Class LogWatcher<E>

  • Direct Known Subclasses:
    JulWatcher, Log4j2Watcher
    public abstract class LogWatcher<E>
extends Object
    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)

    • Field Detail

      • last

        protected long last

    • Constructor Detail

      • LogWatcher

        public LogWatcher()

    • Method Detail

      • getName

        public abstract String getName()
        Returns:
        The implementation name

      • getAllLevels

        public abstract List<String> getAllLevels()
        Returns:
        The valid level names for this framework

      • setLogLevel

        public abstract void setLogLevel​(String category,
                                 String level)
        Sets the log level within this framework

      • getAllLoggers

        public abstract Collection<LoggerInfo> getAllLoggers()
        Returns:
        all registered loggers

      • setThreshold

        public abstract void setThreshold​(String level)

      • getThreshold

        public abstract String getThreshold()

      • add

        public void add​(E event,
                long timstamp)

      • getLastEvent

        public long getLastEvent()

      • getHistorySize

        public int getHistorySize()

      • getTimestamp

        public abstract long getTimestamp​(E event)

      • toSolrDocument

        public abstract SolrDocument toSolrDocument​(E event)

      • registerListener

        public abstract void registerListener​(ListenerConfig cfg)

      • reset

        public void reset()

      • newRegisteredLogWatcher

        public static LogWatcher<?> newRegisteredLogWatcher​(LogWatcherConfig config,
                                                    SolrResourceLoader loader)
        Create and register a LogWatcher.

        JUL and Log4j watchers are supported out-of-the-box. You can register your own LogWatcher implementation via the plugins architecture

        Parameters:
        config - a LogWatcherConfig object, containing the configuration for this LogWatcher.
        loader - a SolrResourceLoader, to be used to load plugin LogWatcher implementations. Can be null if
        Returns:
        a LogWatcher configured for the container's logging framework