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ClusterSeed.java
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ClusterSeed.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.convert;
import java.nio.ByteBuffer;
import java.util.Base64;
import java.util.Objects;
import org.neo4j.kernel.impl.store.StoreId;
public class ClusterSeed
{
private final StoreId before;
private final StoreId after;
private final long lastTxId;
public ClusterSeed( StoreId before, StoreId after, long lastTxId )
{
this.before = before;
this.after = after;
this.lastTxId = lastTxId;
}
public static ClusterSeed create( String rawConversionId )
{
byte[] bytes = Base64.getDecoder().decode( rawConversionId );
ByteBuffer buffer = ByteBuffer.wrap( bytes );
long txId = buffer.getLong();
StoreId before = readStoreId( buffer );
StoreId after = readStoreId( buffer );
return new ClusterSeed( before, after, txId );
}
private static StoreId readStoreId( ByteBuffer buffer )
{
long creationTime = buffer.getLong();
long randomId = buffer.getLong();
long storeVersion = buffer.getLong();
long upgradeTime = buffer.getLong();
long upgradeId = buffer.getLong();
return new StoreId( creationTime, randomId, storeVersion, upgradeTime, upgradeId );
}
public StoreId after()
{
return after;
}
public String getConversionId()
{
ByteBuffer buffer = ByteBuffer.allocate( 88 );
buffer.putLong( lastTxId );
buffer.putLong( before.getCreationTime() );
buffer.putLong( before.getRandomId() );
buffer.putLong( before.getStoreVersion() );
buffer.putLong( before.getUpgradeTime() );
buffer.putLong( before.getUpgradeId() );
buffer.putLong( after.getCreationTime() );
buffer.putLong( after.getRandomId() );
buffer.putLong( after.getStoreVersion() );
buffer.putLong( after.getUpgradeTime() );
buffer.putLong( after.getUpgradeId() );
return Base64.getEncoder().encodeToString( buffer.array() );
}
@Override
public String toString()
{
return String.format( "SourceMetadata{before=%s, after=%s, lastTxId=%d}", before, after, lastTxId );
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{
return true;
}
if ( o == null || getClass() != o.getClass() )
{
return false;
}
ClusterSeed that = (ClusterSeed) o;
return lastTxId == that.lastTxId &&
storeIdEquals( before, that.before ) &&
storeIdEquals( after, that.after );
}
@Override
public int hashCode()
{
int result = 31 + storeIdHashcode( before );
result = 31 * result + storeIdHashcode( after );
return 31 * result + Objects.hash( lastTxId );
}
private int storeIdHashcode( StoreId storeId )
{
return this.before == null ? 0 : storeId.theRealHashCode();
}
private boolean storeIdEquals( StoreId one, StoreId two)
{
return (one == two || (one != null && one.theRealEquals( two )));
}
public StoreId before()
{
return before;
}
public long lastTxId()
{
return lastTxId;
}
}