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DistributedOperation.java
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DistributedOperation.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j Enterprise Edition. The included source
* code can be redistributed and/or modified under the terms of the
* GNU AFFERO GENERAL PUBLIC LICENSE Version 3
* (http://www.fsf.org/licensing/licenses/agpl-3.0.html) with the
* Commons Clause, as found in the associated LICENSE.txt file.
*
* 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.
*
* Neo4j object code can be licensed independently from the source
* under separate terms from the AGPL. Inquiries can be directed to:
* licensing@neo4j.com
*
* More information is also available at:
* https://neo4j.com/licensing/
*/
package org.neo4j.causalclustering.core.replication;
import java.io.IOException;
import java.util.Objects;
import java.util.UUID;
import org.neo4j.causalclustering.core.replication.session.GlobalSession;
import org.neo4j.causalclustering.core.replication.session.LocalOperationId;
import org.neo4j.causalclustering.identity.MemberId;
import org.neo4j.causalclustering.messaging.EndOfStreamException;
import org.neo4j.causalclustering.messaging.marshalling.ByteBufAwareMarshal;
import org.neo4j.causalclustering.messaging.marshalling.ContentBuilder;
import org.neo4j.storageengine.api.ReadableChannel;
/**
* A uniquely identifiable operation.
*/
public class DistributedOperation implements ReplicatedContent
{
private final ReplicatedContent content;
private final GlobalSession globalSession;
private final LocalOperationId operationId;
public DistributedOperation( ReplicatedContent content, GlobalSession globalSession, LocalOperationId operationId )
{
this.content = content;
this.globalSession = globalSession;
this.operationId = operationId;
}
public GlobalSession globalSession()
{
return globalSession;
}
public LocalOperationId operationId()
{
return operationId;
}
public ReplicatedContent content()
{
return content;
}
@Override
public boolean hasSize()
{
return content.hasSize();
}
@Override
public long size()
{
return content.size();
}
/**
* This this consumer ignores the content which is handles by its own serializer.
*
* @return Consumer with instructions for writing to channel.
*/
public ByteBufAwareMarshal serialize()
{
return ByteBufAwareMarshal.simple( channel1 ->
{
channel1.putLong( globalSession().sessionId().getMostSignificantBits() );
channel1.putLong( globalSession().sessionId().getLeastSignificantBits() );
new MemberId.Marshal().marshal( globalSession().owner(), channel1 );
channel1.putLong( operationId.localSessionId() );
channel1.putLong( operationId.sequenceNumber() );
} );
}
public static ContentBuilder<ReplicatedContent> deserialize( ReadableChannel channel ) throws IOException, EndOfStreamException
{
long mostSigBits = channel.getLong();
long leastSigBits = channel.getLong();
MemberId owner = new MemberId.Marshal().unmarshal( channel );
GlobalSession globalSession = new GlobalSession( new UUID( mostSigBits, leastSigBits ), owner );
long localSessionId = channel.getLong();
long sequenceNumber = channel.getLong();
LocalOperationId localOperationId = new LocalOperationId( localSessionId, sequenceNumber );
return ContentBuilder.unfinished( subContent -> new DistributedOperation( subContent, globalSession, localOperationId ) );
}
@Override
public String toString()
{
return "DistributedOperation{" +
"content=" + content +
", globalSession=" + globalSession +
", operationId=" + operationId +
'}';
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{
return true;
}
if ( o == null || getClass() != o.getClass() )
{
return false;
}
DistributedOperation that = (DistributedOperation) o;
return Objects.equals( content, that.content ) && Objects.equals( globalSession, that.globalSession ) &&
Objects.equals( operationId, that.operationId );
}
@Override
public int hashCode()
{
return Objects.hash( content, globalSession, operationId );
}
}