org.apache.flink.streaming.runtime.operators.windowing

接口 KeyMap.TraversalEvaluator<K,V>

类型参数:

K - The type of the key.

V - The type of the value.

封闭类:

KeyMap<K,V>

public static interface KeyMap.TraversalEvaluator<K,V>

A visitor for a traversal over the union of multiple hash maps. The visitor is called for each key in the union of the maps and all values associated with that key (one per map, but multiple across maps).

方法概要

限定符和类型	方法和说明
void	keyDone() Called when the traversal for the current key is complete.
void	nextValue(V value) Called for each value found for the current key.
void	startNewKey(K key) Called whenever the traversal starts with a new key.

方法详细资料

startNewKey

void startNewKey(K key)
          throws Exception

Called whenever the traversal starts with a new key.

参数:

key - The key traversed.

抛出:

Exception - Method forwards all exceptions.

nextValue

void nextValue(V value)
        throws Exception

Called for each value found for the current key.

参数:

value - The next value.

抛出:

Exception - Method forwards all exceptions.

keyDone

void keyDone()
      throws Exception

Called when the traversal for the current key is complete.

抛出:

Exception - Method forwards all exceptions.