tzulitai commented on a change in pull request #8122: [FLINK-12121] [State
Backends] Use composition instead of inheritance for the InternalKeyContext
logic in backend
URL: https://github.com/apache/flink/pull/8122#discussion_r273795301
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/state/heap/StateTable.java
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@@ -52,13 +52,22 @@
protected RegisteredKeyValueStateBackendMetaInfo<N, S> metaInfo;
/**
- *
- * @param keyContext the key context provides the key scope for all
put/get/delete operations.
- * @param metaInfo the meta information, including the type serializer
for state copy-on-write.
+ * The serializer of the key.
+ */
+ protected final TypeSerializer<K> keySerializer;
+
+ /**
+ * @param keyContext the key context provides the key scope for all
put/get/delete operations.
+ * @param metaInfo the meta information, including the type
serializer for state copy-on-write.
+ * @param keySerializer the serializer of the key.
*/
- public StateTable(InternalKeyContext<K> keyContext,
RegisteredKeyValueStateBackendMetaInfo<N, S> metaInfo) {
+ public StateTable(
+ InternalKeyContext<K> keyContext,
+ RegisteredKeyValueStateBackendMetaInfo<N, S> metaInfo,
+ TypeSerializer<K> keySerializer) {
this.keyContext = Preconditions.checkNotNull(keyContext);
this.metaInfo = Preconditions.checkNotNull(metaInfo);
+ this.keySerializer = keySerializer;
Review comment:
`this.keySerializer = Preconditions.checkNotNull(keySerializer)`
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