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CausalClusteringBackupStrategy.java
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CausalClusteringBackupStrategy.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.backup;
import java.io.File;
import org.neo4j.causalclustering.catchup.CatchupResult;
import org.neo4j.causalclustering.catchup.storecopy.StoreCopyFailedException;
import org.neo4j.causalclustering.catchup.storecopy.StoreIdDownloadFailedException;
import org.neo4j.causalclustering.identity.StoreId;
import org.neo4j.helpers.AdvertisedSocketAddress;
import org.neo4j.kernel.impl.util.OptionalHostnamePort;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
public class CausalClusteringBackupStrategy extends LifecycleAdapter implements BackupStrategy
{
private final BackupDelegator backupDelegator;
private final AddressResolutionHelper addressResolutionHelper;
CausalClusteringBackupStrategy( BackupDelegator backupDelegator, AddressResolutionHelper addressResolutionHelper )
{
this.backupDelegator = backupDelegator;
this.addressResolutionHelper = addressResolutionHelper;
}
@Override
public PotentiallyErroneousState<BackupStageOutcome> performFullBackup( File desiredBackupLocation, Config config,
OptionalHostnamePort userProvidedAddress )
{
AdvertisedSocketAddress fromAddress = addressResolutionHelper.resolveCorrectCCAddress( config, userProvidedAddress );
StoreId storeId;
try
{
storeId = backupDelegator.fetchStoreId( fromAddress );
}
catch ( StoreIdDownloadFailedException e )
{
return new PotentiallyErroneousState<>( BackupStageOutcome.WRONG_PROTOCOL, e );
}
try
{
backupDelegator.copy( fromAddress,storeId, desiredBackupLocation );
return new PotentiallyErroneousState<>( BackupStageOutcome.SUCCESS, null );
}
catch ( StoreCopyFailedException e )
{
return new PotentiallyErroneousState<>( BackupStageOutcome.FAILURE, e );
}
}
@Override
public PotentiallyErroneousState<BackupStageOutcome> performIncrementalBackup( File desiredBackupLocation, Config config,
OptionalHostnamePort userProvidedAddress )
{
AdvertisedSocketAddress fromAddress = addressResolutionHelper.resolveCorrectCCAddress( config, userProvidedAddress );
StoreId storeId;
try
{
storeId = backupDelegator.fetchStoreId( fromAddress );
}
catch ( StoreIdDownloadFailedException e )
{
return new PotentiallyErroneousState<>( BackupStageOutcome.WRONG_PROTOCOL, e );
}
return catchup( fromAddress, storeId, desiredBackupLocation );
}
@Override
public void start() throws Throwable
{
super.start();
backupDelegator.start();
}
@Override
public void stop() throws Throwable
{
backupDelegator.stop();
super.stop();
}
private PotentiallyErroneousState<BackupStageOutcome> catchup( AdvertisedSocketAddress fromAddress, StoreId storeId, File backupTarget )
{
CatchupResult catchupResult;
try
{
catchupResult = backupDelegator.tryCatchingUp( fromAddress, storeId, backupTarget );
}
catch ( StoreCopyFailedException e )
{
return new PotentiallyErroneousState<>( BackupStageOutcome.FAILURE, e );
}
if ( catchupResult == CatchupResult.SUCCESS_END_OF_STREAM )
{
return new PotentiallyErroneousState<>( BackupStageOutcome.SUCCESS, null );
}
return new PotentiallyErroneousState<>( BackupStageOutcome.FAILURE,
new StoreCopyFailedException( "End state of catchup was not a successful end of stream" ) );
}
}