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

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 * 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
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * See the License for the specific language governing permissions and
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package org.apache.accumulo.testing.randomwalk.shard;

import java.net.InetAddress;
import java.util.Random;
import java.util.SortedSet;
import java.util.TreeSet;

import org.apache.accumulo.core.client.AccumuloClient;
import org.apache.accumulo.core.client.MultiTableBatchWriter;
import org.apache.accumulo.core.client.MutationsRejectedException;
import org.apache.accumulo.core.conf.Property;
import org.apache.accumulo.testing.randomwalk.Fixture;
import org.apache.accumulo.testing.randomwalk.RandWalkEnv;
import org.apache.accumulo.testing.randomwalk.State;
import org.apache.hadoop.io.Text;
import org.slf4j.Logger;

public class ShardFixture extends Fixture {

  static SortedSet<Text> genSplits(long max, int numTablets, String format) {

    int numSplits = numTablets - 1;
    long distance = max / numTablets;
    long split = distance;

    TreeSet<Text> splits = new TreeSet<>();

    for (int i = 0; i < numSplits; i++) {
      splits.add(new Text(String.format(format, split)));
      split += distance;
    }

    return splits;
  }

  static void createIndexTable(Logger log, State state, RandWalkEnv env, String suffix, Random rand)
      throws Exception {
    AccumuloClient client = env.getAccumuloClient();
    String name = state.get("indexTableName") + suffix;
    int numPartitions = (Integer) state.get("numPartitions");
    boolean enableCache = (Boolean) state.get("cacheIndex");
    client.tableOperations().create(name);

    String tableId = client.tableOperations().tableIdMap().get(name);
    log.info("Created index table " + name + "(id:" + tableId + ")");

    SortedSet<Text> splits = genSplits(numPartitions, rand.nextInt(numPartitions) + 1, "%06x");
    client.tableOperations().addSplits(name, splits);

    log.info("Added " + splits.size() + " splits to " + name);

    if (enableCache) {
      client.tableOperations().setProperty(name, Property.TABLE_INDEXCACHE_ENABLED.getKey(),
          "true");
      client.tableOperations().setProperty(name, Property.TABLE_BLOCKCACHE_ENABLED.getKey(),
          "true");

      log.info("Enabled caching for table " + name);
    }
  }

  @Override
  public void setUp(State state, RandWalkEnv env) throws Exception {
    String hostname = InetAddress.getLocalHost().getHostName().replaceAll("[-.]", "_");
    String pid = env.getPid();

    Random rand = new Random();

    int numPartitions = rand.nextInt(90) + 10;

    state.set("indexTableName",
        String.format("ST_index_%s_%s_%d", hostname, pid, System.currentTimeMillis()));
    state.set("docTableName",
        String.format("ST_docs_%s_%s_%d", hostname, pid, System.currentTimeMillis()));
    state.set("numPartitions", Integer.valueOf(numPartitions));
    state.set("cacheIndex", rand.nextDouble() < .5);
    state.set("rand", rand);
    state.set("nextDocID", Long.valueOf(0));

    AccumuloClient client = env.getAccumuloClient();

    createIndexTable(this.log, state, env, "", rand);

    String docTableName = (String) state.get("docTableName");
    client.tableOperations().create(docTableName);

    String tableId = client.tableOperations().tableIdMap().get(docTableName);
    log.info("Created doc table " + docTableName + " (id:" + tableId + ")");

    SortedSet<Text> splits = genSplits(0xff, rand.nextInt(32) + 1, "%02x");
    client.tableOperations().addSplits(docTableName, splits);

    log.info("Added " + splits.size() + " splits to " + docTableName);

    if (rand.nextDouble() < .5) {
      client.tableOperations().setProperty((String) state.get("docTableName"),
          Property.TABLE_BLOOM_ENABLED.getKey(), "true");
      log.info("Enabled bloom filters for table " + (String) state.get("docTableName"));
    }
  }

  @Override
  public void tearDown(State state, RandWalkEnv env) throws Exception {
    // We have resources we need to clean up
    if (env.isMultiTableBatchWriterInitialized()) {
      MultiTableBatchWriter mtbw = env.getMultiTableBatchWriter();
      try {
        mtbw.close();
      } catch (MutationsRejectedException e) {
        log.error("Ignoring mutations that weren't flushed", e);
      }

      // Reset the MTBW on the state to null
      env.resetMultiTableBatchWriter();
    }

    AccumuloClient client = env.getAccumuloClient();

    log.info("Deleting index and doc tables");

    client.tableOperations().delete((String) state.get("indexTableName"));
    client.tableOperations().delete((String) state.get("docTableName"));

    log.debug("Exiting shard test");
  }

}