Github user yanghua commented on a diff in the pull request:
https://github.com/apache/flink/pull/6134#discussion_r193651829
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/state/KeyedStateFunction.java
---
@@ -25,13 +25,13 @@
* <p>This functionality is only available through the
* {@code BroadcastConnectedStream.process(final
KeyedBroadcastProcessFunction function)}.
*/
-public abstract class KeyedStateFunction<K, S extends State> {
+public interface KeyedStateFunction<K, S extends State> {
--- End diff --
@dawidwys can I change current usage like :
```
// valid state value via applyToAllKeys().
backend.applyToAllKeys(VoidNamespace.INSTANCE,
VoidNamespaceSerializer.INSTANCE, listStateDescriptor,
new KeyedStateFunction<Integer,
ListState<String>>() {
@Override
public void process(Integer key,
ListState<String> state) throws Exception {
assertEquals("Hello" + key,
state.get().iterator().next());
}
});
// clear state via applyToAllKeys().
backend.applyToAllKeys(VoidNamespace.INSTANCE,
VoidNamespaceSerializer.INSTANCE, listStateDescriptor,
new KeyedStateFunction<Integer,
ListState<String>>() {
@Override
public void process(Integer key,
ListState<String> state) throws Exception {
state.clear();
}
});
```
to lambda function style to verify the change?
---
