org.apache.cassandra.diag

Interface LastEventIdBroadcasterMBean

public interface LastEventIdBroadcasterMBean

Provides a list of event types and the corresponding highest event IDs. Consumers may these IDs to determine if new data is available.

Example result

Event	Last ID
BootstrapEvent	312
CompactionEvent	a53f9338-5f24-11e8-9c2d-fa7ae01bbebc

Clients may either retrieve the current list of all events IDs, or make conditional requests for event IDs based on the timestamp of the last update (much in the sense of e.g. HTTP's If-Modified-Since semantics).

Method Summary

Modifier and Type	Method and Description
java.util.Map<java.lang.String,java.lang.Comparable>	getLastEventIds() Retrieves a list of all event types and their highest IDs.
java.util.Map<java.lang.String,java.lang.Comparable>	getLastEventIdsIfModified(long lastUpdate) Retrieves a list of all event types and their highest IDs, if updated since specified timestamp, or null.

Method Detail

getLastEventIds

java.util.Map<java.lang.String,java.lang.Comparable> getLastEventIds()

Retrieves a list of all event types and their highest IDs.

getLastEventIdsIfModified

java.util.Map<java.lang.String,java.lang.Comparable> getLastEventIdsIfModified(long lastUpdate)

Retrieves a list of all event types and their highest IDs, if updated since specified timestamp, or null.

Parameters:

lastUpdate - timestamp to use to determine if IDs have been updated