HazelcastAPI IMap.addIndex metodu

Giriş

İmzası şöyle

void addIndex(IndexConfig indexConfig);

default void addIndex(IndexType type, String... attributes) {
  IndexConfig config = IndexUtils.createIndexConfig(type, attributes);

  addIndex(config);
}

Örnek - Tek Index

Şöyle yaparız

IMap<String, Person> map = hzClient.getMap("map");
mapWithIndex.addIndex(new IndexConfig(IndexType.HASH, "name"));

Örnek - Key İçin Index

Şöyle yaparız

val userOrderConfig = MapConfig(Caches.USER_ORDERS)
userOrderConfig.apply {
  this.evictionConfig = EvictionConfig().setEvictionPolicy(EvictionPolicy.LRU).apply {
    this.maxSizePolicy =MaxSizePolicy.PER_NODE
    this.size = 10000
  }
  this.timeToLiveSeconds = (30*60)
}
    
userOrderConfig.addIndexConfig(IndexConfig(IndexType.SORTED, "__key"))
hzInstance.config.addMapConfig(userOrderConfig)

Örnek - İki Index

Şöyle yaparız

import com.hazelcast.query.Predicates;

IMap<String, Employee> map = instance.getMap("employees");
map.addIndex(IndexType.SORTED, "age");
map.addIndex(IndexType.HASH, "active");

Set<Map.Entry<String, Employee>> entries = map
  .entrySet(Predicates.sql("active=true and age>44"));