/*
 * 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.kylin.engine.mr.steps;

import java.io.File;
import java.io.IOException;
import java.util.Map;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.kylin.common.util.HadoopUtil;
import org.apache.kylin.common.util.RandomUtil;
import org.apache.kylin.engine.mr.common.CubeStatsWriter;
import org.apache.kylin.measure.hllc.HLLCounter;
import org.junit.Test;

import com.google.common.collect.Maps;

/**
 */
public class FactDistinctColumnsReducerTest {

    @Test
    public void testWriteCuboidStatistics() throws IOException {

        final Configuration conf = HadoopUtil.getCurrentConfiguration();
        File tmp = File.createTempFile("cuboidstatistics", "");
        final Path outputPath = new Path(tmp.getParent().toString() + File.separator + RandomUtil.randomUUID().toString());
        if (!FileSystem.getLocal(conf).exists(outputPath)) {
            //            FileSystem.getLocal(conf).create(outputPath);
        }

        System.out.println(outputPath);
        Map<Long, HLLCounter> cuboidHLLMap = Maps.newHashMap();
        CubeStatsWriter.writeCuboidStatistics(conf, outputPath, cuboidHLLMap, 100);
        FileSystem.getLocal(conf).delete(outputPath, true);

    }
}
