Interface EventHandler<T>

Type Parameters:
T - event implementation storing the data for sharing during exchange or parallel coordination of an event.
All Known Subinterfaces:
SequenceReportingEventHandler<T>
All Known Implementing Classes:
AggregateEventHandler

public interface EventHandler<T>
Callback interface to be implemented for processing events as they become available in the RingBuffer
See Also:
  • Method Summary

    Modifier and Type
    Method
    Description
    void
    onEvent(T event, long sequence, boolean endOfBatch)
    Called when a publisher has published an event to the RingBuffer.
  • Method Details

    • onEvent

      void onEvent(T event, long sequence, boolean endOfBatch) throws Exception
      Called when a publisher has published an event to the RingBuffer. The BatchEventProcessor will read messages from the RingBuffer in batches, where a batch is all of the events available to be processed without having to wait for any new event to arrive. This can be useful for event handlers that need to do slower operations like I/O as they can group together the data from multiple events into a single operation. Implementations should ensure that the operation is always performed when endOfBatch is true as the time between that message an the next one is inderminate.
      Parameters:
      event - published to the RingBuffer
      sequence - of the event being processed
      endOfBatch - flag to indicate if this is the last event in a batch from the RingBuffer
      Throws:
      Exception - if the EventHandler would like the exception handled further up the chain.