co.cask.cdap.messaging.cache

Interface MessageCache.Scanner<T>

Type Parameters:

T - type of the entry

All Superinterfaces:

AutoCloseable, co.cask.cdap.api.dataset.lib.CloseableIterator<T>, Iterator<T>

Enclosing class:

MessageCache<T>

public static interface MessageCache.Scanner<T>
extends co.cask.cdap.api.dataset.lib.CloseableIterator<T>

This interface is for accessing cached entries.

Method Summary

Modifier and Type	Method and Description
T	getFirstInCache() Returns the first (smallest) entry in the cache when this scanner was created.

Methods inherited from interface co.cask.cdap.api.dataset.lib.CloseableIterator

close

Methods inherited from interface java.util.Iterator

forEachRemaining, hasNext, next, remove

Method Detail

getFirstInCache

@Nullable
T getFirstInCache()

Returns the first (smallest) entry in the cache when this scanner was created.

Returns:

the first entry in the cache or null if the cache was empty