/**
 * 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.stress.operations;

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

import org.apache.cassandra.stress.Operation;
import org.apache.cassandra.stress.settings.SettingsCommandMulti;
import org.apache.cassandra.stress.util.ThriftClient;
import org.apache.cassandra.thrift.ColumnParent;
import org.apache.cassandra.thrift.SlicePredicate;
import org.apache.cassandra.thrift.SliceRange;
import org.apache.cassandra.utils.ByteBufferUtil;


public final class ThriftMultiGetter extends Operation
{

    public ThriftMultiGetter(State state, long index)
    {
        super(state, index);
    }

    public void run(final ThriftClient client) throws IOException
    {

        final SlicePredicate predicate = new SlicePredicate().setSlice_range(
                new SliceRange(
                        ByteBufferUtil.EMPTY_BYTE_BUFFER,
                        ByteBufferUtil.EMPTY_BYTE_BUFFER,
                        false,
                        state.settings.columns.maxColumnsPerKey
                )
        );

        final List<ByteBuffer> keys = getKeys(((SettingsCommandMulti) state.settings.command).keysAtOnce);

        for (final ColumnParent parent : state.columnParents)
        {
            timeWithRetry(new RunOp()
            {
                int count;
                @Override
                public boolean run() throws Exception
                {
                    return (count = client.multiget_slice(keys, parent, predicate, state.settings.command.consistencyLevel).size()) != 0;
                }

                @Override
                public String key()
                {
                    return keys.toString();
                }

                @Override
                public int keyCount()
                {
                    return count;
                }
            });
        }
    }

}