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StoreCopyClient.java
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StoreCopyClient.java
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/*
* Copyright (c) 2002-2017 "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.catchup.storecopy;
import java.io.IOException;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;
import org.neo4j.causalclustering.catchup.CatchUpClient;
import org.neo4j.causalclustering.catchup.CatchUpClientException;
import org.neo4j.causalclustering.catchup.CatchUpResponseAdaptor;
import org.neo4j.causalclustering.core.state.snapshot.TopologyLookupException;
import org.neo4j.causalclustering.discovery.TopologyService;
import org.neo4j.causalclustering.identity.MemberId;
import org.neo4j.causalclustering.identity.StoreId;
import org.neo4j.helpers.AdvertisedSocketAddress;
import org.neo4j.logging.Log;
import org.neo4j.logging.LogProvider;
import static java.lang.String.format;
public class StoreCopyClient
{
private final CatchUpClient catchUpClient;
private final Log log;
public StoreCopyClient( CatchUpClient catchUpClient, LogProvider logProvider )
{
this.catchUpClient = catchUpClient;
log = logProvider.getLog( getClass() );
}
long copyStoreFiles( AdvertisedSocketAddress from, StoreId expectedStoreId, StoreFileStreams storeFileStreams )
throws StoreCopyFailedException
{
try
{
return catchUpClient.makeBlockingRequest( from, new GetStoreRequest( expectedStoreId ),
new CatchUpResponseAdaptor<Long>()
{
private String destination;
private int requiredAlignment;
@Override
public void onFileHeader( CompletableFuture<Long> requestOutcomeSignal, FileHeader fileHeader )
{
this.destination = fileHeader.fileName();
this.requiredAlignment = fileHeader.requiredAlignment();
}
@Override
public boolean onFileContent( CompletableFuture<Long> signal, FileChunk fileChunk )
throws IOException
{
storeFileStreams.write( destination, requiredAlignment, fileChunk.bytes() );
return fileChunk.isLast();
}
@Override
public void onFileStreamingComplete( CompletableFuture<Long> signal,
StoreCopyFinishedResponse response )
{
log.info( "Finished streaming %s", destination );
signal.complete( response.lastCommittedTxBeforeStoreCopy() );
}
} );
}
catch ( CatchUpClientException e )
{
throw new StoreCopyFailedException( e );
}
}
StoreId fetchStoreId( AdvertisedSocketAddress fromAddress ) throws StoreIdDownloadFailedException
{
try
{
CatchUpResponseAdaptor<StoreId> responseHandler = new CatchUpResponseAdaptor<StoreId>()
{
@Override
public void onGetStoreIdResponse( CompletableFuture<StoreId> signal,
GetStoreIdResponse response )
{
signal.complete( response.storeId() );
}
};
return catchUpClient.makeBlockingRequest( fromAddress, new GetStoreIdRequest(), responseHandler );
}
catch ( CatchUpClientException e )
{
throw new StoreIdDownloadFailedException( e );
}
}
}