How to check if some affinity values exists in Ignite Cache?

Question

Is there any function like cache.containsAffinity(T myField) to check if such affinity value exists in the cache?

For example, I set cache config like this: <AffinityKey<String>, Object>, and write data using streamer:

streamer.addData(new AffinityKey<>(idKey1, "a"), obj)

streamer.addData(new AffinityKey<>(idKey2, "b"), obj)

streamer.addData(new AffinityKey<>(idKey3, "c"), obj)

How can I check if affinity value "a" exists in the cache and has related data entries, while affinity "f" has no related data?

Answer 1

You can just to do cache.get(new AffinityKey<>(idKey1, "a")) and check returned value