src/main/java/org/apache/accumulo/testing/continuous/CreateTable.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.continuous;

import static org.apache.accumulo.testing.TestProps.CI_COMMON_ACCUMULO_NUM_TABLETS;

import java.util.HashMap;
import java.util.Map;
import java.util.SortedSet;
import java.util.TreeSet;

import org.apache.accumulo.core.client.AccumuloClient;
import org.apache.accumulo.core.client.admin.NewTableConfiguration;
import org.apache.accumulo.testing.TestProps;
import org.apache.hadoop.io.Text;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class CreateTable {
  private static final Logger log = LoggerFactory.getLogger(CreateTable.class);

  public static void main(String[] args) throws Exception {

    try (ContinuousEnv env = new ContinuousEnv(args)) {

      AccumuloClient client = env.getAccumuloClient();
      String tableName = env.getAccumuloTableName();
      if (client.tableOperations().exists(tableName)) {
        log.error("Accumulo table {} already exists", tableName);
        System.exit(-1);
      }

      int numTablets = Integer.parseInt(env.getTestProperty(CI_COMMON_ACCUMULO_NUM_TABLETS));

      if (numTablets < 1) {
        log.error("numTablets < 1");
        System.exit(-1);
      }
      if (env.getRowMin() >= env.getRowMax()) {
        log.error("min >= max");
        System.exit(-1);
      }

      SortedSet<Text> splits = new TreeSet<>();
      int numSplits = numTablets - 1;
      long distance = ((env.getRowMax() - env.getRowMin()) / numTablets) + 1;
      long split = distance;
      for (int i = 0; i < numSplits; i++) {
        String s = String.format("%016x", split + env.getRowMin());
        while (s.charAt(s.length() - 1) == '0') {
          s = s.substring(0, s.length() - 1);
        }
        splits.add(new Text(s));
        split += distance;
      }

      NewTableConfiguration ntc = new NewTableConfiguration();
      ntc.withSplits(splits);
      ntc.setProperties(getTableProps(env));

      client.tableOperations().create(tableName, ntc);

      log.info("Created Accumulo table {} with {} tablets", tableName, numTablets);
    }
  }

  private static Map<String,String> getTableProps(ContinuousEnv env) {
    String[] props = env.getTestProperty(TestProps.CI_COMMON_ACCUMULO_TABLE_PROPS).split(" ");
    Map<String,String> tableProps = new HashMap<>();
    for (String prop : props) {
      log.debug("prop: {}", prop);
      String[] kv = prop.split("=");
      tableProps.put(kv[0], kv[1]);
    }
    return tableProps;
  }
}