@Override
  public List<AmbryReplica> getReplicaIds() {
    return clusterManagerQueryHelper.getReplicaIdsForPartition(this);
  }
Instantiate an AmbryPartition instance.
@param id the id associated with this partition.
@param partitionClass the partition class that this partition belongs to
@param clusterManagerQueryHelper {@link HelixClusterManagerQueryHelper} to query cluster information.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/AmbryPartition.java