regex on key hazelcast

Question

I am storing data using map data structure in Hazelcast. This will get stored like below:

key1 valueforKey1
key2 valueforkey2
key11 valueforKey11
key22 valueforKey22
key123 valueforKey123
key33 valueforKey33

Now I want to fetch data on the basis of key from hazelcast, e.g I want all records whose key starts with key1*.

How can I do this in hazelcast?

Note: At value I am storing some string.

Answer 1

Just by using the Hazelcast Criteria API http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#criteria-api

Either with like or regex directives.

edit:

Here's a complete example:

public class Test {
  public static void main(String[] args) {
    HazelcastInstance hazelcastInstance = Hazelcast.newHazelcastInstance();
    IMap<String, String> map = hazelcastInstance.getMap("map-name");

    map.put("key1", "value-1");
    map.put("key21", "value-21");
    map.put("key11", "value-key11");

    SqlPredicate predicate = new SqlPredicate("__key REGEX '^key1.*$'");
    System.out.println(map.values(predicate));
  }
}