software.amazon.jdbc.util.events

Interface EventSubscriber

All Known Subinterfaces:

ClusterTopologyMonitor, HostMonitor

All Known Implementing Classes:

ClusterTopologyMonitorImpl, GlobalAuroraTopologyMonitor, HostMonitorV1Impl, HostMonitorV2Impl, MonitorServiceImpl, NodeResponseTimeMonitor

public interface EventSubscriber

An event subscriber. Subscribers can subscribe to a publisher's events using EventPublisher.subscribe(EventSubscriber, Set). Subscribers will typically be stored in a HashSet to prevent duplicate subscriptions, so classes implementing this interface should consider whether they need to override Object.equals(Object) and Object.hashCode().

All implementations of this interface MUST be immutable or use both the default Object.equals(java.lang.Object) and Object.hashCode() implementations, as instances will be used as keys in hash-based collections. Mutable implementations may cause undefined behavior when used as Map keys or Set elements.

See Also:

EventPublisher

Method Summary

Modifier and Type	Method and Description
void	processEvent(Event event) Processes an event.

Method Detail

processEvent

void processEvent(Event event)

Processes an event. This method will only be called on this subscriber if it has subscribed to the event class via EventPublisher.subscribe(software.amazon.jdbc.util.events.EventSubscriber, java.util.Set<java.lang.Class<? extends software.amazon.jdbc.util.events.Event>>).

Parameters:

event - the event to process.