test/src/main/java/org/apache/accumulo/test/FindMaxIT.java

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 * 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
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 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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package org.apache.accumulo.test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;

import java.util.ArrayList;
import java.util.Map.Entry;

import org.apache.accumulo.core.client.Accumulo;
import org.apache.accumulo.core.client.AccumuloClient;
import org.apache.accumulo.core.client.BatchWriter;
import org.apache.accumulo.core.client.Scanner;
import org.apache.accumulo.core.data.Key;
import org.apache.accumulo.core.data.Mutation;
import org.apache.accumulo.core.data.Value;
import org.apache.accumulo.core.security.Authorizations;
import org.apache.accumulo.harness.AccumuloClusterHarness;
import org.apache.hadoop.io.Text;
import org.junit.Test;

public class FindMaxIT extends AccumuloClusterHarness {

  private static Mutation nm(byte[] row) {
    Mutation m = new Mutation(new Text(row));
    m.put("cf", "cq", "v");
    return m;
  }

  private static Mutation nm(String row) {
    Mutation m = new Mutation(row);
    m.put("cf", "cq", "v");
    return m;
  }

  @Test
  public void test1() throws Exception {
    try (AccumuloClient client = Accumulo.newClient().from(getClientProps()).build()) {
      String tableName = getUniqueNames(1)[0];

      client.tableOperations().create(tableName);

      try (BatchWriter bw = client.createBatchWriter(tableName)) {
        bw.addMutation(nm(new byte[] {0}));
        bw.addMutation(nm(new byte[] {0, 0}));
        bw.addMutation(nm(new byte[] {0, 1}));
        bw.addMutation(nm(new byte[] {0, 1, 0}));
        bw.addMutation(nm(new byte[] {1, 0}));
        bw.addMutation(nm(new byte[] {'a', 'b', 'c'}));
        bw.addMutation(nm(new byte[] {(byte) 0xff}));
        bw.addMutation(nm(new byte[] {(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff,
            (byte) 0xff, (byte) 0xff}));

        for (int i = 0; i < 1000; i += 5) {
          bw.addMutation(nm(String.format("r%05d", i)));
        }
      }

      try (Scanner scanner = client.createScanner(tableName, Authorizations.EMPTY)) {

        ArrayList<Text> rows = new ArrayList<>();

        for (Entry<Key,Value> entry : scanner) {
          rows.add(entry.getKey().getRow());
        }

        for (int i = rows.size() - 1; i > 0; i--) {
          Text max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, null, true,
              rows.get(i), false);
          assertEquals(rows.get(i - 1), max);

          max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, rows.get(i - 1),
              true, rows.get(i), false);
          assertEquals(rows.get(i - 1), max);

          max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, rows.get(i - 1),
              false, rows.get(i), false);
          assertNull(max);

          max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, null, true,
              rows.get(i), true);
          assertEquals(rows.get(i), max);

          max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, rows.get(i),
              true, rows.get(i), true);
          assertEquals(rows.get(i), max);

          max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, rows.get(i - 1),
              false, rows.get(i), true);
          assertEquals(rows.get(i), max);

        }

        Text max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, null, true,
            null, true);
        assertEquals(rows.get(rows.size() - 1), max);

        max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, null, true,
            new Text(new byte[] {0}), false);
        assertNull(max);

        max = client.tableOperations().getMaxRow(tableName, Authorizations.EMPTY, null, true,
            new Text(new byte[] {0}), true);
        assertEquals(rows.get(0), max);
      }
    }
  }
}