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CoreStateDownloader.java
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CoreStateDownloader.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.state;
import java.io.IOException;
import org.neo4j.coreedge.catchup.storecopy.LocalDatabase;
import org.neo4j.coreedge.catchup.storecopy.StoreCopyFailedException;
import org.neo4j.coreedge.catchup.storecopy.edge.StoreFetcher;
import org.neo4j.coreedge.catchup.storecopy.edge.state.StateFetcher;
import org.neo4j.coreedge.server.AdvertisedSocketAddress;
import org.neo4j.logging.Log;
import org.neo4j.logging.LogProvider;
public class CoreStateDownloader
{
private final LocalDatabase localDatabase;
private final StoreFetcher storeFetcher;
private final StateFetcher stateFetcher;
private final Log log;
public CoreStateDownloader( LocalDatabase localDatabase, StoreFetcher storeFetcher, StateFetcher stateFetcher, LogProvider logProvider )
{
this.localDatabase = localDatabase;
this.storeFetcher = storeFetcher;
this.stateFetcher = stateFetcher;
this.log = logProvider.getLog( getClass() );
}
void downloadSnapshot( AdvertisedSocketAddress source, CoreState receiver ) throws InterruptedException, StoreCopyFailedException
{
localDatabase.stop();
try
{
log.info( "Downloading snapshot from core server at %s", source );
localDatabase.copyStoreFrom( source, storeFetcher );
stateFetcher.copyRaftState( source, receiver );
localDatabase.start();
}
catch ( StoreCopyFailedException e )
{
log.warn( "Failed to download snapshot", e );
}
catch ( IOException e )
{
localDatabase.panic( e );
}
}
}