Package org.apache.cassandra.db.index

Source Code of org.apache.cassandra.db.index.SecondaryIndexBuilder

/**
* 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.db.index;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.SortedSet;

import org.apache.cassandra.db.ColumnFamilyStore;
import org.apache.cassandra.db.DecoratedKey;
import org.apache.cassandra.db.Table;
import org.apache.cassandra.db.compaction.CompactionInfo;
import org.apache.cassandra.db.compaction.OperationType;
import org.apache.cassandra.io.sstable.ReducingKeyIterator;

/**
* Manages building an entire index from column family data
* Sent to compaction manager
*/
public class SecondaryIndexBuilder implements  CompactionInfo.Holder
{
   
    private final ColumnFamilyStore cfs;
    private final SortedSet<ByteBuffer> columns;
    private final ReducingKeyIterator iter;
   
    public SecondaryIndexBuilder(ColumnFamilyStore cfs, SortedSet<ByteBuffer> columns, ReducingKeyIterator iter)
    {
        this.cfs = cfs;
        this.columns = columns;
        this.iter = iter;
    }

    public CompactionInfo getCompactionInfo()
    {
        return new CompactionInfo(this.hashCode(),
                                  cfs.table.name,
                                  cfs.columnFamily,
                                  OperationType.INDEX_BUILD,
                                  iter.getBytesRead(),
                                  iter.getTotalBytes());
    }

    public void build()
    {
        while (iter.hasNext())
        {
            DecoratedKey<?> key = iter.next();
            Table.indexRow(key, cfs, columns);
        }

        try
        {
            iter.close();
        }
        catch (IOException e)
        {
            throw new RuntimeException(e);
        }
    }
}
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