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RaftProtocolServerInstaller.java
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RaftProtocolServerInstaller.java
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/*
* Copyright (c) 2002-2018 "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.causalclustering.core.consensus;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInboundHandler;
import java.time.Clock;
import java.util.List;
import java.util.stream.Collectors;
import org.neo4j.causalclustering.messaging.CoreReplicatedContentMarshal;
import org.neo4j.causalclustering.messaging.marshalling.RaftMessageDecoder;
import org.neo4j.causalclustering.protocol.ModifierProtocolInstaller;
import org.neo4j.causalclustering.protocol.NettyPipelineBuilderFactory;
import org.neo4j.causalclustering.protocol.Protocol;
import org.neo4j.causalclustering.protocol.ProtocolInstaller;
import org.neo4j.causalclustering.protocol.ProtocolInstaller.Orientation;
import org.neo4j.logging.Log;
import org.neo4j.logging.LogProvider;
public class RaftProtocolServerInstaller implements ProtocolInstaller<Orientation.Server>
{
private static final Protocol.ApplicationProtocols APPLICATION_PROTOCOL = Protocol.ApplicationProtocols.RAFT_1;
public static class Factory extends ProtocolInstaller.Factory<Orientation.Server, RaftProtocolServerInstaller>
{
public Factory( ChannelInboundHandler raftMessageHandler, NettyPipelineBuilderFactory pipelineBuilderFactory, LogProvider logProvider )
{
super( APPLICATION_PROTOCOL,
modifiers -> new RaftProtocolServerInstaller( raftMessageHandler, pipelineBuilderFactory, modifiers, logProvider ) );
}
}
private final ChannelInboundHandler raftMessageHandler;
private final NettyPipelineBuilderFactory pipelineBuilderFactory;
private final List<ModifierProtocolInstaller<Orientation.Server>> modifiers;
private final Log log;
public RaftProtocolServerInstaller( ChannelInboundHandler raftMessageHandler, NettyPipelineBuilderFactory pipelineBuilderFactory,
List<ModifierProtocolInstaller<Orientation.Server>> modifiers, LogProvider logProvider )
{
this.raftMessageHandler = raftMessageHandler;
this.pipelineBuilderFactory = pipelineBuilderFactory;
this.modifiers = modifiers;
this.log = logProvider.getLog( getClass() );
}
@Override
public void install( Channel channel ) throws Exception
{
pipelineBuilderFactory.server( channel, log )
.modify( modifiers )
.addFraming()
.add( "raft_decoder", new RaftMessageDecoder( new CoreReplicatedContentMarshal(), Clock.systemUTC() ) )
.add( "raft_handler", raftMessageHandler )
.install();
}
@Override
public Protocol.ApplicationProtocol applicationProtocol()
{
return APPLICATION_PROTOCOL;
}
@Override
public List<Protocol.ModifierProtocol> modifiers()
{
return modifiers.stream().map( ModifierProtocolInstaller::protocol ).collect( Collectors.toList() );
}
}