com.hazelcast.partition.membergroup.ZoneAwareMemberGroupFactory Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, 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.partition.membergroup;
import com.hazelcast.core.Member;
import com.hazelcast.spi.discovery.DiscoveryStrategy;
import com.hazelcast.spi.partitiongroup.PartitionGroupMetaData;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
/**
* ZoneAwareMemberGroupFactory is responsible for MemberGroups
* creation according to the host metadata provided by
* {@link DiscoveryStrategy#discoverLocalMetadata()}
* @since 3.7
*/
public class ZoneAwareMemberGroupFactory extends BackupSafeMemberGroupFactory implements MemberGroupFactory {
@Override
protected Set createInternalMemberGroups(Collection allMembers) {
Map groups = new HashMap();
for (Member member : allMembers) {
final String zoneInfo = member.getStringAttribute(PartitionGroupMetaData.PARTITION_GROUP_ZONE);
final String rackInfo = member.getStringAttribute(PartitionGroupMetaData.PARTITION_GROUP_RACK);
final String hostInfo = member.getStringAttribute(PartitionGroupMetaData.PARTITION_GROUP_HOST);
if (zoneInfo == null && rackInfo == null && hostInfo == null) {
throw new IllegalArgumentException("Not enough metadata information is provided. "
+ "At least one of availability zone, rack or host information must be provided "
+ "with ZONE_AWARE partition group.");
}
if (zoneInfo != null) {
MemberGroup group = groups.get(zoneInfo);
if (group == null) {
group = new DefaultMemberGroup();
groups.put(zoneInfo, group);
}
group.addMember(member);
} else {
if (rackInfo != null) {
MemberGroup group = groups.get(rackInfo);
if (group == null) {
group = new DefaultMemberGroup();
groups.put(rackInfo, group);
}
group.addMember(member);
} else {
if (hostInfo != null) {
MemberGroup group = groups.get(hostInfo);
if (group == null) {
group = new DefaultMemberGroup();
groups.put(hostInfo, group);
}
group.addMember(member);
}
}
}
}
return new HashSet(groups.values());
}
}