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如何遍历KeyValueStore中的所有元素

[英]how to go through all element in KeyValueStore

原文 2017-05-03 17:54:33 3 1 java/ apache-samza

I have a KeyValueStore of type KeyValueStore>. 我有一个类型为KeyValueStore>的KeyValueStore。 I don't know the range of the keys. 我不知道键的范围。 Is there any way I can iterate through the whole keyvaluestore in samza? 有什么办法可以遍历samza中的整个keyvaluestore？ Thanks 谢谢

1 个解决方案

Sure. 当然。 Use the all() method on the KeyValueStore instance. 在KeyValueStore实例上使用all（）方法。 That will return an iterator which you can use to scan the whole store. 这将返回一个迭代器，可用于扫描整个商店。

http://samza.apache.org/learn/documentation/0.12/api/javadocs/org/apache/samza/storage/kv/KeyValueStore.html#all-- http://samza.apache.org/learn/documentation/0.12/api/javadocs/org/apache/samza/storage/kv/KeyValueStore.html#all--

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