org.apache.nifi.cluster.event

Interface EventManager

All Known Implementing Classes:

EventManagerImpl

public interface EventManager

Manages an ordered list of events. The event history size dictates the total number of events to manage for a given source at a given time. When the size is exceeded, the oldest event for that source is evicted.

Method Summary

Modifier and Type	Method and Description
void	addEvent(Event event) Adds an event to the manager.
void	clearEventHistory(String eventSource)
int	getEventHistorySize() Returns the history size.
List<Event>	getEvents(String eventSource) Returns a list of events for a given source sorted by the event's timestamp where the most recent event is first in the list.
Event	getMostRecentEvent(String eventSource)

Method Detail

addEvent

void addEvent(Event event)

Adds an event to the manager.

Parameters:

event - an Event

getEvents

List<Event> getEvents(String eventSource)

Returns a list of events for a given source sorted by the event's timestamp where the most recent event is first in the list.

Parameters:

eventSource - the source

Returns:

the list of events

getMostRecentEvent

Event getMostRecentEvent(String eventSource)

clearEventHistory

void clearEventHistory(String eventSource)

getEventHistorySize

int getEventHistorySize()

Returns the history size.

Returns:

the history size