org.apache.cassandra.diag.store

Interface DiagnosticEventStore<T extends java.lang.Comparable<T>>

Type Parameters:

T - type of key that is used to reference an event

All Known Implementing Classes:

DiagnosticEventMemoryStore

public interface DiagnosticEventStore<T extends java.lang.Comparable<T>>

Enables storing and retrieving DiagnosticEvents.

Method Summary

Modifier and Type	Method and Description
T	getLastEventId() Returns the greatest event ID that can be used to fetch events via scan(Comparable, int).
void	load() Initializes the store.
java.util.NavigableMap<T,DiagnosticEvent>	scan(T key, int limit) Returns a view on all events with a key greater than the provided value (inclusive) up to the specified number of results.
void	store(DiagnosticEvent event) Stores provided event and returns the new associated store key for it.

Method Detail

load

void load()

Initializes the store.

store

void store(DiagnosticEvent event)

Stores provided event and returns the new associated store key for it.

scan

java.util.NavigableMap<T,DiagnosticEvent> scan(T key,
                                               int limit)

Returns a view on all events with a key greater than the provided value (inclusive) up to the specified number of results. Events may be added or become unavailable over time. Keys must be unique, sortable and monotonically incrementing. Returns an empty map in case no events could be found.

getLastEventId

T getLastEventId()

Returns the greatest event ID that can be used to fetch events via scan(Comparable, int).