zhengbuqian commented on code in PR #23491:
URL: https://github.com/apache/beam/pull/23491#discussion_r1029950941
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runners/core-java/src/main/java/org/apache/beam/runners/core/InMemoryStateInternals.java:
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@@ -463,6 +476,116 @@ public InMemoryBag<T> copy() {
}
}
+ /** An {@link InMemoryState} implementation of {@link MultimapState}. */
+ public static final class InMemoryMultimap<K, V>
+ implements MultimapState<K, V>, InMemoryState<InMemoryMultimap<K, V>> {
+ private final Coder<K> keyCoder;
+ private final Coder<V> valueCoder;
+ private Multimap<K, V> contents = ArrayListMultimap.create();
+
+ public InMemoryMultimap(Coder<K> keyCoder, Coder<V> valueCoder) {
+ this.keyCoder = keyCoder;
+ this.valueCoder = valueCoder;
+ }
+
+ @Override
+ public void clear() {
+ contents = ArrayListMultimap.create();
+ }
+
+ @Override
+ public void put(K key, V value) {
+ contents.put(key, value);
+ }
+
+ @Override
+ public void remove(K key) {
+ contents.removeAll(key);
+ }
+
+ @Override
+ public @UnknownKeyFor @NonNull @Initialized ReadableState<Iterable<V>>
get(K key) {
Review Comment:
No they are not, do we have a way of auto generating annotations?
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