Package org.apache.druid.java.util.emitter.core

Interface Emitter

All Superinterfaces:
AutoCloseable, Closeable, Flushable
All Known Implementing Classes:
ComposingEmitter, HttpPostEmitter, LoggingEmitter, NoopEmitter, ParametrizedUriEmitter, ServiceEmitter, SwitchingEmitter
public interface Emitter extends Closeable, Flushable

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    close()
     
    void
    emit(Event event)
    Emit an event.
    void
    flush()
     
    void
    start()
     

  • Method Details

    • start

      void start()

    • emit

      void emit(Event event)
      Emit an event. This method must not throw exceptions or block. If an implementation receives too many events and internal queues fill up, it should drop events rather than blocking or consuming excessive memory. If an implementation receives input it considers to be invalid, or has an internal problem, it should deal with that by logging a warning rather than throwing an exception. Implementations that log warnings should consider throttling warnings to avoid excessive logs, since a busy Druid cluster can emit a high volume of metric events.

    • flush

      void flush() throws IOException
      Specified by:
      flush in interface Flushable
      Throws:
      IOException

    • close

      void close() throws IOException
      Specified by:
      close in interface AutoCloseable
      Specified by:
      close in interface Closeable
      Throws:
      IOException