Examples of edu.brown.utils.PartitionSet.retainAll()

        // the prepare response once all of the PartitionExecutors have successfully
        // acknowledged that we're ready to commit
        PartitionSet partitions = new PartitionSet(request.getPartitionsList());
        assert(partitions.isEmpty() == false) :
            "Unexpected empty list of updated partitions for txn #" + txn_id;
        partitions.retainAll(hstore_site.getLocalPartitionIds());
        
        RemoteTransaction ts = this.hstore_site.getTransaction(txn_id);
        assert(ts != null) : "Unexpected null transaction handle for txn #" + txn_id;
        
        // Always create a new prepare callback because we may get multiple messages

        
        // Remove all of the estimated read partitions except for one
        PartitionSet e_read_partitions = this.costmodel.getLastEstimatedReadPartitions();
        assertNotNull(e_read_partitions);
        Set<Integer> retain = (Set<Integer>)CollectionUtil.addAll(new HashSet<Integer>(), CollectionUtil.first(e_read_partitions)); 
        e_read_partitions.retainAll(retain);
        
        // Then add all of our partitions to the actual read partitions
        PartitionSet a_read_partitions = this.costmodel.getLastActualReadPartitions();
        a_read_partitions.addAll(catalogContext.getAllPartitionIds());

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.