hazelcast-master/hazelcast/src/main/java/com/hazelcast/internal/partition/membergroup/HostAwareMemberGroupFactory.java
/*
 * Copyright (c) 2008-2023, Hazelcast, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.internal.partition.membergroup;

import com.hazelcast.cluster.Member;
import com.hazelcast.cluster.impl.MemberImpl;
import com.hazelcast.cluster.Address;
import com.hazelcast.spi.partitiongroup.MemberGroup;

import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import static com.hazelcast.internal.util.MapUtil.createHashMap;

public class HostAwareMemberGroupFactory extends BackupSafeMemberGroupFactory implements MemberGroupFactory {

    @Override
    protected Set<MemberGroup> createInternalMemberGroups(Collection<? extends Member> allMembers) {
        Map<String, MemberGroup> groups = createHashMap(allMembers.size());
        for (Member member : allMembers) {
            Address address = ((MemberImpl) member).getAddress();
            MemberGroup group = groups.get(address.getHost());
            if (group == null) {
                group = new DefaultMemberGroup();
                groups.put(address.getHost(), group);
            }
            group.addMember(member);
        }
        return new HashSet<MemberGroup>(groups.values());
    }
}

