org.neo4j.coreedge.core.state.snapshot.CoreSnapshotResponseHandler Maven / Gradle / Ivy

/*
 * 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 .
 */
package org.neo4j.coreedge.core.state.snapshot;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;

import org.neo4j.coreedge.catchup.CatchUpResponseHandler;
import org.neo4j.coreedge.catchup.CatchupClientProtocol;

public class CoreSnapshotResponseHandler extends SimpleChannelInboundHandler
{
    private final CatchupClientProtocol protocol;
    private final CatchUpResponseHandler listener;

    public CoreSnapshotResponseHandler( CatchupClientProtocol protocol, CatchUpResponseHandler listener )
    {
        this.protocol = protocol;
        this.listener = listener;
    }

    @Override
    protected void channelRead0( ChannelHandlerContext ctx, final CoreSnapshot coreSnapshot ) throws Exception
    {
        if ( protocol.isExpecting( CatchupClientProtocol.State.CORE_SNAPSHOT ) )
        {
            listener.onCoreSnapshot( coreSnapshot );
            protocol.expect( CatchupClientProtocol.State.MESSAGE_TYPE );
        }
        else
        {
            ctx.fireChannelRead( coreSnapshot );
        }
    }
}