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HazelcastClusterTopology.java
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HazelcastClusterTopology.java
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/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.coreedge.discovery;
import java.util.HashSet;
import java.util.Set;
import com.hazelcast.core.HazelcastInstance;
import com.hazelcast.core.Member;
import org.neo4j.coreedge.server.AdvertisedSocketAddress;
import org.neo4j.coreedge.server.CoreMember;
import static org.neo4j.coreedge.discovery.HazelcastServerLifecycle.TRANSACTION_SERVER;
import static org.neo4j.coreedge.discovery.HazelcastServerLifecycle.RAFT_SERVER;
public class HazelcastClusterTopology implements ClusterTopology
{
public static final String EDGE_SERVERS = "edge-servers";
private HazelcastInstance hazelcast;
public HazelcastClusterTopology( HazelcastInstance hazelcast )
{
this.hazelcast = hazelcast;
}
@Override
public boolean bootstrappable()
{
Member firstMember = hazelcast.getCluster().getMembers().iterator().next();
return firstMember.localMember();
}
@Override
public int getNumberOfCoreServers()
{
return hazelcast.getCluster().getMembers().size();
}
@Override
public Set<CoreMember> getMembers()
{
return toCoreMembers( hazelcast.getCluster().getMembers() );
}
private Set<CoreMember> toCoreMembers( Set<Member> members )
{
HashSet<CoreMember> coreMembers = new HashSet<>();
for ( Member member : members )
{
coreMembers.add( new CoreMember(
new AdvertisedSocketAddress( member.getStringAttribute( TRANSACTION_SERVER ) ),
new AdvertisedSocketAddress( member.getStringAttribute( RAFT_SERVER ) )
));
}
return coreMembers;
}
@Override
public int getNumberOfEdgeServers()
{
return hazelcast.getMap( EDGE_SERVERS ).size();
}
@Override
public AdvertisedSocketAddress firstTransactionServer()
{
Member member = hazelcast.getCluster().getMembers().iterator().next();
return new AdvertisedSocketAddress( member.getStringAttribute( TRANSACTION_SERVER ) );
}
}