src/main/java/org/apache/accumulo/testing/randomwalk/shard/CompactFilter.java

/*
 * 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.accumulo.testing.randomwalk.shard;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Random;

import org.apache.accumulo.core.client.BatchScanner;
import org.apache.accumulo.core.client.IteratorSetting;
import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Range;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.iterators.user.RegExFilter;
import org.apache.accumulo.core.security.Authorizations;
import org.apache.accumulo.testing.randomwalk.RandWalkEnv;
import org.apache.accumulo.testing.randomwalk.State;
import org.apache.accumulo.testing.randomwalk.Test;
import org.apache.hadoop.io.Text;

/**
 * Test deleting documents by using a compaction filter iterator
 */
public class CompactFilter extends Test {

  @Override
  public void visit(State state, RandWalkEnv env, Properties props) throws Exception {
    String indexTableName = (String) state.get("indexTableName");
    String docTableName = (String) state.get("docTableName");
    Random rand = (Random) state.get("rand");

    String deleteChar = Integer.toHexString(rand.nextInt(16)) + "";
    String regex = "^[0-9a-f][" + deleteChar + "].*";

    ArrayList<IteratorSetting> documentFilters = new ArrayList<>();

    IteratorSetting is = new IteratorSetting(21, "ii", RegExFilter.class);
    RegExFilter.setRegexs(is, regex, null, null, null, false);
    RegExFilter.setNegate(is, true);
    documentFilters.add(is);

    long t1 = System.currentTimeMillis();
    env.getAccumuloClient().tableOperations().compact(docTableName, null, null, documentFilters,
        true, true);
    long t2 = System.currentTimeMillis();
    long t3 = t2 - t1;

    ArrayList<IteratorSetting> indexFilters = new ArrayList<>();

    is = new IteratorSetting(21, RegExFilter.class);
    RegExFilter.setRegexs(is, null, null, regex, null, false);
    RegExFilter.setNegate(is, true);
    indexFilters.add(is);

    t1 = System.currentTimeMillis();
    env.getAccumuloClient().tableOperations().compact(indexTableName, null, null, indexFilters,
        true, true);
    t2 = System.currentTimeMillis();

    log.debug(
        "Filtered documents using compaction iterators " + regex + " " + (t3) + " " + (t2 - t1));

    BatchScanner bscanner = env.getAccumuloClient().createBatchScanner(docTableName,
        new Authorizations(), 10);

    List<Range> ranges = new ArrayList<>();
    for (int i = 0; i < 16; i++) {
      ranges.add(Range.prefix(new Text(Integer.toHexString(i) + "" + deleteChar)));
    }

    bscanner.setRanges(ranges);
    Iterator<Entry<Key,Value>> iter = bscanner.iterator();

    if (iter.hasNext()) {
      throw new Exception("Saw unexpected document " + iter.next().getKey());
    }

    bscanner.close();
  }

}