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StoreCopyResponseAdaptors.java
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StoreCopyResponseAdaptors.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.catchup.storecopy;
import java.util.concurrent.CompletableFuture;
import org.neo4j.causalclustering.catchup.CatchUpResponseAdaptor;
import org.neo4j.logging.Log;
public abstract class StoreCopyResponseAdaptors<T> extends CatchUpResponseAdaptor<T>
{
static StoreCopyResponseAdaptors<StoreCopyFinishedResponse> filesCopyAdaptor( StoreFileStreamProvider storeFileStreamProvider, Log log )
{
return new StoreFilesCopyResponseAdaptors( storeFileStreamProvider, log );
}
static StoreCopyResponseAdaptors<PrepareStoreCopyResponse> prepareStoreCopyAdaptor( StoreFileStreamProvider storeFileStreamProvider, Log log )
{
return new PrepareStoreCopyResponseAdaptors( storeFileStreamProvider, log );
}
private final StoreFileStreamProvider storeFileStreamProvider;
private final Log log;
private StoreFileStream storeFileStream;
private StoreCopyResponseAdaptors( StoreFileStreamProvider storeFileStreamProvider, Log log )
{
this.storeFileStreamProvider = storeFileStreamProvider;
this.log = log;
}
@Override
public void onFileHeader( CompletableFuture<T> requestOutcomeSignal, FileHeader fileHeader )
{
try
{
storeFileStream = storeFileStreamProvider.acquire( fileHeader.fileName(), fileHeader.requiredAlignment() );
requestOutcomeSignal.whenComplete( ( storeCopyFinishedResponse, throwable ) ->
{
try
{
storeFileStream.close();
}
catch ( Exception e )
{
log.error( "Unable to close store file stream", e );
}
} );
}
catch ( Exception e )
{
requestOutcomeSignal.completeExceptionally( e );
}
}
@Override
public boolean onFileContent( CompletableFuture<T> signal, FileChunk fileChunk )
{
try
{
storeFileStream.write( fileChunk.bytes() );
}
catch ( Exception e )
{
signal.completeExceptionally( e );
}
return fileChunk.isLast();
}
private static class PrepareStoreCopyResponseAdaptors extends StoreCopyResponseAdaptors<PrepareStoreCopyResponse>
{
PrepareStoreCopyResponseAdaptors( StoreFileStreamProvider storeFileStreamProvider, Log log )
{
super( storeFileStreamProvider, log );
}
@Override
public void onStoreListingResponse( CompletableFuture<PrepareStoreCopyResponse> signal, PrepareStoreCopyResponse response )
{
signal.complete( response );
}
}
private static class StoreFilesCopyResponseAdaptors extends StoreCopyResponseAdaptors<StoreCopyFinishedResponse>
{
StoreFilesCopyResponseAdaptors( StoreFileStreamProvider storeFileStreamProvider, Log log )
{
super( storeFileStreamProvider, log );
}
@Override
public void onFileStreamingComplete( CompletableFuture<StoreCopyFinishedResponse> signal, StoreCopyFinishedResponse response )
{
signal.complete( response );
}
}
}