core/src/main/java/org/apache/accumulo/testing/core/randomwalk/concurrent/DeleteRange.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.core.randomwalk.concurrent;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Properties;
import java.util.Random;

import org.apache.accumulo.core.client.AccumuloClient;
import org.apache.accumulo.core.client.TableNotFoundException;
import org.apache.accumulo.core.client.TableOfflineException;
import org.apache.accumulo.testing.core.randomwalk.RandWalkEnv;
import org.apache.accumulo.testing.core.randomwalk.State;
import org.apache.accumulo.testing.core.randomwalk.Test;
import org.apache.hadoop.io.Text;

public class DeleteRange extends Test {

  @Override
  public void visit(State state, RandWalkEnv env, Properties props) throws Exception {
    AccumuloClient client = env.getAccumuloClient();

    Random rand = (Random) state.get("rand");

    @SuppressWarnings("unchecked")
    List<String> tableNames = (List<String>) state.get("tables");

    String tableName = tableNames.get(rand.nextInt(tableNames.size()));

    List<Text> range = new ArrayList<>();
    do {
      range.add(new Text(String.format("%016x", rand.nextLong() & 0x7fffffffffffffffl)));
      range.add(new Text(String.format("%016x", rand.nextLong() & 0x7fffffffffffffffl)));
    } while (range.get(0).equals(range.get(1)));
    Collections.sort(range);
    if (rand.nextInt(20) == 0)
      range.set(0, null);
    if (rand.nextInt(20) == 0)
      range.set(1, null);

    try {
      client.tableOperations().deleteRows(tableName, range.get(0), range.get(1));
      log.debug("deleted rows (" + range.get(0) + " -> " + range.get(1) + "] in " + tableName);
    } catch (TableNotFoundException tne) {
      log.debug("deleted rows " + tableName + " failed, doesnt exist");
    } catch (TableOfflineException toe) {
      log.debug("deleted rows " + tableName + " failed, offline");
    }
  }
}