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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cassandra.streaming;
import java.io.IOException;
import java.io.Serializable;
import java.util.UUID;
import com.google.common.base.Objects;
import org.apache.cassandra.db.TypeSizes;
import org.apache.cassandra.io.IVersionedSerializer;
import org.apache.cassandra.io.util.DataInputPlus;
import org.apache.cassandra.io.util.DataOutputPlus;
import org.apache.cassandra.net.MessagingService;
import org.apache.cassandra.utils.UUIDSerializer;
/**
* Summary of streaming.
*/
public class StreamSummary implements Serializable
{
public static final IVersionedSerializer serializer = new StreamSummarySerializer();
public final UUID cfId;
/**
* Number of files to transfer. Can be 0 if nothing to transfer for some streaming request.
*/
public final int files;
public final long totalSize;
public StreamSummary(UUID cfId, int files, long totalSize)
{
this.cfId = cfId;
this.files = files;
this.totalSize = totalSize;
}
@Override
public boolean equals(Object o)
{
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
StreamSummary summary = (StreamSummary) o;
return files == summary.files && totalSize == summary.totalSize && cfId.equals(summary.cfId);
}
@Override
public int hashCode()
{
return Objects.hashCode(cfId, files, totalSize);
}
@Override
public String toString()
{
final StringBuilder sb = new StringBuilder("StreamSummary{");
sb.append("path=").append(cfId);
sb.append(", files=").append(files);
sb.append(", totalSize=").append(totalSize);
sb.append('}');
return sb.toString();
}
public static class StreamSummarySerializer implements IVersionedSerializer
{
// arbitrary version is fine for UUIDSerializer for now...
public void serialize(StreamSummary summary, DataOutputPlus out, int version) throws IOException
{
UUIDSerializer.serializer.serialize(summary.cfId, out, MessagingService.current_version);
out.writeInt(summary.files);
out.writeLong(summary.totalSize);
}
public StreamSummary deserialize(DataInputPlus in, int version) throws IOException
{
UUID cfId = UUIDSerializer.serializer.deserialize(in, MessagingService.current_version);
int files = in.readInt();
long totalSize = in.readLong();
return new StreamSummary(cfId, files, totalSize);
}
public long serializedSize(StreamSummary summary, int version)
{
long size = UUIDSerializer.serializer.serializedSize(summary.cfId, MessagingService.current_version);
size += TypeSizes.sizeof(summary.files);
size += TypeSizes.sizeof(summary.totalSize);
return size;
}
}
}