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hazelcasthazelcast-imap

Hazelcast query to get Map based on keyset and predicate

I have a hazelcast IMAP which looks like

IMAP = key -> val1, val2, val3

indexed on val1, val2 I am trying to get say key->val2 given the set of Keys

hzObj.getMap("testMap").getAll(keys.toSet.asJava)
which returns the key->val1, val2, val3

Need help to write predicate which says to return only key->val2 Please help

Solution

  • @nocturnal, please see example usage below:

    imap.project(Projections.singleAttribute("val2"), Predicates.in("__key", new String[]{"key1, key2"}));

    One important note, that'll require you to define an index on key as well.

    Since this will be using query threads, you can also use imap.getAll(Set keys) instead & then just convert it to Collection of val2.