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RaftInstanceBuilder.java
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RaftInstanceBuilder.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.raft;
import java.util.function.Supplier;
import org.neo4j.coreedge.raft.log.InMemoryRaftLog;
import org.neo4j.coreedge.raft.log.RaftLog;
import org.neo4j.coreedge.raft.membership.RaftGroup;
import org.neo4j.coreedge.raft.membership.RaftMembershipManager;
import org.neo4j.coreedge.raft.net.Inbound;
import org.neo4j.coreedge.raft.net.Outbound;
import org.neo4j.coreedge.raft.replication.LeaderOnlyReplicator;
import org.neo4j.coreedge.raft.replication.shipping.RaftLogShippingManager;
import org.neo4j.coreedge.raft.state.InMemoryStateStorage;
import org.neo4j.coreedge.raft.state.StateStorage;
import org.neo4j.coreedge.raft.state.membership.RaftMembershipState;
import org.neo4j.coreedge.raft.state.term.TermState;
import org.neo4j.coreedge.raft.state.vote.VoteState;
import org.neo4j.helpers.Clock;
import org.neo4j.kernel.internal.DatabaseHealth;
import org.neo4j.kernel.monitoring.Monitors;
import org.neo4j.logging.LogProvider;
import org.neo4j.logging.NullLogProvider;
public class RaftInstanceBuilder<MEMBER>
{
private final MEMBER member;
private int expectedClusterSize;
private RaftGroup.Builder<MEMBER> memberSetBuilder;
private StateStorage<TermState> termState = new InMemoryStateStorage<>( new TermState() );
private StateStorage<VoteState<MEMBER>> voteState = new InMemoryStateStorage<>( new VoteState<>() );
private RaftLog raftLog = new InMemoryRaftLog();
private RenewableTimeoutService renewableTimeoutService = new DelayedRenewableTimeoutService( Clock.SYSTEM_CLOCK,
NullLogProvider.getInstance() );
private Inbound<RaftMessages.RaftMessage<MEMBER>> inbound = handler -> {};
private Outbound<MEMBER> outbound = ( advertisedSocketAddress, messages ) -> {};
private LogProvider logProvider = NullLogProvider.getInstance();
private Clock clock = Clock.SYSTEM_CLOCK;
private long electionTimeout = 500;
private long heartbeatInterval = 150;
private long catchupTimeout = 30000;
private long retryTimeMillis = electionTimeout / 2;
private int catchupBatchSize = 64;
private int maxAllowedShippingLag = 256;
private Supplier<DatabaseHealth> databaseHealthSupplier;
private StateStorage<RaftMembershipState<MEMBER>> raftMembership =
new InMemoryStateStorage<>( new RaftMembershipState<>() );
private Monitors monitors = new Monitors();
private RaftStateMachine raftStateMachine = new RaftStateMachine(){};
public RaftInstanceBuilder( MEMBER member, int expectedClusterSize, RaftGroup.Builder<MEMBER> memberSetBuilder )
{
this.member = member;
this.expectedClusterSize = expectedClusterSize;
this.memberSetBuilder = memberSetBuilder;
}
public RaftInstance<MEMBER> build()
{
LeaderOnlyReplicator<MEMBER, MEMBER> leaderOnlyReplicator = new LeaderOnlyReplicator<>( member, member,
outbound );
RaftMembershipManager<MEMBER> membershipManager = new RaftMembershipManager<>( leaderOnlyReplicator,
memberSetBuilder, raftLog, logProvider, expectedClusterSize, electionTimeout, clock, catchupTimeout,
raftMembership );
RaftLogShippingManager<MEMBER> logShipping = new RaftLogShippingManager<>( outbound, logProvider, raftLog,
clock, member, membershipManager, retryTimeMillis, catchupBatchSize, maxAllowedShippingLag );
return new RaftInstance<>( member, termState, voteState, raftLog, raftStateMachine, electionTimeout,
heartbeatInterval, renewableTimeoutService, inbound, outbound, logProvider,
membershipManager, logShipping, databaseHealthSupplier, monitors );
}
public RaftInstanceBuilder<MEMBER> electionTimeout( long electionTimeout )
{
this.electionTimeout = electionTimeout;
return this;
}
public RaftInstanceBuilder<MEMBER> heartbeatInterval( long heartbeatInterval )
{
this.heartbeatInterval = heartbeatInterval;
return this;
}
public RaftInstanceBuilder<MEMBER> timeoutService( RenewableTimeoutService renewableTimeoutService )
{
this.renewableTimeoutService = renewableTimeoutService;
return this;
}
public RaftInstanceBuilder<MEMBER> outbound( Outbound<MEMBER> outbound )
{
this.outbound = outbound;
return this;
}
public RaftInstanceBuilder<MEMBER> inbound( Inbound inbound )
{
this.inbound = inbound;
return this;
}
public RaftInstanceBuilder<MEMBER> raftLog( RaftLog raftLog )
{
this.raftLog = raftLog;
return this;
}
public RaftInstanceBuilder<MEMBER> stateMachine( RaftStateMachine raftStateMachine )
{
this.raftStateMachine = raftStateMachine;
return this;
}
public RaftInstanceBuilder<MEMBER> databaseHealth( final DatabaseHealth databaseHealth )
{
this.databaseHealthSupplier = () -> databaseHealth;
return this;
}
public RaftInstanceBuilder<MEMBER> monitors( Monitors monitors )
{
this.monitors = monitors;
return this;
}
}