Examples of org.apache.accumulo.core.client.ConditionalWriter

org.apache.accumulo.core.client.ConditionalWriter
ConditionalWriter provides the ability to do efficient, atomic read-modify-write operations on rows. These operations are performed on the tablet server while a row lock is held. @since 1.6.0

    conn.tableOperations().addConstraint(tableName, AlphaNumKeyConstraint.class.getName());
    conn.tableOperations().clone(tableName, tableName + "_clone", true, new HashMap<String,String>(), new HashSet<String>());


    Scanner scanner = conn.createScanner(tableName + "_clone", new Authorizations());


    ConditionalWriter cw = conn.createConditionalWriter(tableName + "_clone", new ConditionalWriterConfig());


    ConditionalMutation cm0 = new ConditionalMutation("99006+", new Condition("tx", "seq"));
    cm0.put("tx", "seq", "1");


    Assert.assertEquals(Status.VIOLATED, cw.write(cm0).getStatus());
    Assert.assertFalse(scanner.iterator().hasNext());


    ConditionalMutation cm1 = new ConditionalMutation("99006", new Condition("tx", "seq"));
    cm1.put("tx", "seq", "1");


    Assert.assertEquals(Status.ACCEPTED, cw.write(cm1).getStatus());
    Assert.assertTrue(scanner.iterator().hasNext());


    cw.close();
  }

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    scanner.setRange(new Range("ACCUMULO-1000"));
    scanner.fetchColumn(new Text("count"), new Text("comments"));


    Assert.assertEquals("3", scanner.iterator().next().getValue().toString());


    ConditionalWriter cw = conn.createConditionalWriter(tableName, new ConditionalWriterConfig());


    ConditionalMutation cm0 = new ConditionalMutation("ACCUMULO-1000", new Condition("count", "comments").setValue("3"));
    cm0.put("count", "comments", "1");
    Assert.assertEquals(Status.REJECTED, cw.write(cm0).getStatus());
    Assert.assertEquals("3", scanner.iterator().next().getValue().toString());


    ConditionalMutation cm1 = new ConditionalMutation("ACCUMULO-1000", new Condition("count", "comments").setIterators(iterConfig).setValue("3"));
    cm1.put("count", "comments", "1");
    Assert.assertEquals(Status.ACCEPTED, cw.write(cm1).getStatus());
    Assert.assertEquals("4", scanner.iterator().next().getValue().toString());


    ConditionalMutation cm2 = new ConditionalMutation("ACCUMULO-1000", new Condition("count", "comments").setValue("4"));
    cm2.put("count", "comments", "1");
    Assert.assertEquals(Status.REJECTED, cw.write(cm1).getStatus());
    Assert.assertEquals("4", scanner.iterator().next().getValue().toString());


    // run test with multiple iterators passed in same batch and condition with two iterators


    ConditionalMutation cm3 = new ConditionalMutation("ACCUMULO-1000", new Condition("count", "comments").setIterators(iterConfig).setValue("4"));
    cm3.put("count", "comments", "1");


    ConditionalMutation cm4 = new ConditionalMutation("ACCUMULO-1001", new Condition("count2", "comments").setIterators(iterConfig2).setValue("2"));
    cm4.put("count2", "comments", "1");


    ConditionalMutation cm5 = new ConditionalMutation("ACCUMULO-1002", new Condition("count2", "comments").setIterators(iterConfig2, iterConfig3).setValue("2"));
    cm5.put("count2", "comments", "1");


    Iterator<Result> results = cw.write(Arrays.asList(cm3, cm4, cm5).iterator());
    Map<String,Status> actual = new HashMap<String,Status>();


    while (results.hasNext()) {
      Result result = results.next();
      String k = new String(result.getMutation().getRow());
      Assert.assertFalse(actual.containsKey(k));
      actual.put(k, result.getStatus());
    }


    Map<String,Status> expected = new HashMap<String,Status>();
    expected.put("ACCUMULO-1000", Status.ACCEPTED);
    expected.put("ACCUMULO-1001", Status.ACCEPTED);
    expected.put("ACCUMULO-1002", Status.REJECTED);


    Assert.assertEquals(expected, actual);


    // TODO test w/ table that has iterators configured


    cw.close();
  }

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    cm2.put("name", "last", cvab, "doe");
    cm2.put("name", "first", cvab, "jack");
    cm2.put("tx", "seq", cvab, "1");
    mutations.add(cm2);


    ConditionalWriter cw = conn.createConditionalWriter(tableName, new ConditionalWriterConfig().setAuthorizations(new Authorizations("A")));
    Iterator<Result> results = cw.write(mutations.iterator());
    int count = 0;
    while (results.hasNext()) {
      Result result = results.next();
      Assert.assertEquals(Status.ACCEPTED, result.getStatus());
      count++;
    }


    Assert.assertEquals(3, count);


    Scanner scanner = conn.createScanner(tableName, new Authorizations("A"));
    scanner.fetchColumn(new Text("tx"), new Text("seq"));


    for (String row : new String[] {"99006", "59056", "19059"}) {
      scanner.setRange(new Range(row));
      Assert.assertEquals("1", scanner.iterator().next().getValue().toString());
    }


    TreeSet<Text> splits = new TreeSet<Text>();
    splits.add(new Text("7"));
    splits.add(new Text("3"));
    conn.tableOperations().addSplits(tableName, splits);


    mutations.clear();


    ConditionalMutation cm3 = new ConditionalMutation("99006", new Condition("tx", "seq").setVisibility(cvab).setValue("1"));
    cm3.put("name", "last", cvab, "Doe");
    cm3.put("tx", "seq", cvab, "2");
    mutations.add(cm3);


    ConditionalMutation cm4 = new ConditionalMutation("59056", new Condition("tx", "seq").setVisibility(cvab));
    cm4.put("name", "last", cvab, "Doe");
    cm4.put("tx", "seq", cvab, "1");
    mutations.add(cm4);


    ConditionalMutation cm5 = new ConditionalMutation("19059", new Condition("tx", "seq").setVisibility(cvab).setValue("2"));
    cm5.put("name", "last", cvab, "Doe");
    cm5.put("tx", "seq", cvab, "3");
    mutations.add(cm5);


    results = cw.write(mutations.iterator());
    int accepted = 0;
    int rejected = 0;
    while (results.hasNext()) {
      Result result = results.next();
      if (new String(result.getMutation().getRow()).equals("99006")) {
        Assert.assertEquals(Status.ACCEPTED, result.getStatus());
        accepted++;
      } else {
        Assert.assertEquals(Status.REJECTED, result.getStatus());
        rejected++;
      }
    }


    Assert.assertEquals(1, accepted);
    Assert.assertEquals(2, rejected);


    for (String row : new String[] {"59056", "19059"}) {
      scanner.setRange(new Range(row));
      Assert.assertEquals("1", scanner.iterator().next().getValue().toString());
    }


    scanner.setRange(new Range("99006"));
    Assert.assertEquals("2", scanner.iterator().next().getValue().toString());


    scanner.clearColumns();
    scanner.fetchColumn(new Text("name"), new Text("last"));
    Assert.assertEquals("Doe", scanner.iterator().next().getValue().toString());


    cw.close();
  }

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      cm.put("meta", "tx", UUID.randomUUID().toString());


      cml.add(cm);
    }


    ConditionalWriter cw = conn.createConditionalWriter(tableName, new ConditionalWriterConfig());


    Iterator<Result> results = cw.write(cml.iterator());


    int count = 0;


    // TODO check got each row back
    while (results.hasNext()) {
      Result result = results.next();
      Assert.assertEquals(Status.ACCEPTED, result.getStatus());
      count++;
    }


    Assert.assertEquals(num, count);


    ArrayList<ConditionalMutation> cml2 = new ArrayList<ConditionalMutation>(num);


    for (int i = 0; i < num; i++) {
      ConditionalMutation cm = new ConditionalMutation(rows.get(i), new Condition("meta", "seq").setValue("1"));


      cm.put("meta", "seq", "2");
      cm.put("meta", "tx", UUID.randomUUID().toString());


      cml2.add(cm);
    }


    count = 0;


    results = cw.write(cml2.iterator());


    while (results.hasNext()) {
      Result result = results.next();
      Assert.assertEquals(Status.ACCEPTED, result.getStatus());
      count++;
    }


    Assert.assertEquals(num, count);


    cw.close();
  }

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    cm3.put("name", "last", cvaob, "doe");
    cm3.put("name", "first", cvaob, "john");
    cm3.put("tx", "seq", cvaob, "2");
    mutations.add(cm3);


    ConditionalWriter cw = conn.createConditionalWriter(tableName, new ConditionalWriterConfig().setAuthorizations(new Authorizations("A")));
    Iterator<Result> results = cw.write(mutations.iterator());
    HashSet<String> rows = new HashSet<String>();
    while (results.hasNext()) {
      Result result = results.next();
      String row = new String(result.getMutation().getRow());
      if (row.equals("19059")) {
        Assert.assertEquals(Status.ACCEPTED, result.getStatus());
      } else if (row.equals("59056")) {
        Assert.assertEquals(Status.INVISIBLE_VISIBILITY, result.getStatus());
      } else if (row.equals("99006")) {
        Assert.assertEquals(Status.VIOLATED, result.getStatus());
      } else if (row.equals("90909")) {
        Assert.assertEquals(Status.REJECTED, result.getStatus());
      }
      rows.add(row);
    }


    Assert.assertEquals(4, rows.size());


    Scanner scanner = conn.createScanner(tableName, new Authorizations("A"));
    scanner.fetchColumn(new Text("tx"), new Text("seq"));


    Iterator<Entry<Key,Value>> iter = scanner.iterator();
    Assert.assertEquals("1", iter.next().getValue().toString());
    Assert.assertFalse(iter.hasNext());


    cw.close();
  }

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    Connector conn = getConnector();
    String tableName = getUniqueNames(1)[0];


    conn.tableOperations().create(tableName);


    ConditionalWriter cw = conn.createConditionalWriter(tableName, new ConditionalWriterConfig());


    ConditionalMutation cm1 = new ConditionalMutation("r1", new Condition("tx", "seq"));
    cm1.put("tx", "seq", "1");
    cm1.put("data", "x", "a");


    Assert.assertEquals(Status.ACCEPTED, cw.write(cm1).getStatus());


    ConditionalMutation cm2 = new ConditionalMutation("r1", new Condition("tx", "seq").setValue("1"));
    cm2.put("tx", "seq", "2");
    cm2.put("data", "x", "b");


    ConditionalMutation cm3 = new ConditionalMutation("r1", new Condition("tx", "seq").setValue("1"));
    cm3.put("tx", "seq", "2");
    cm3.put("data", "x", "c");


    ConditionalMutation cm4 = new ConditionalMutation("r1", new Condition("tx", "seq").setValue("1"));
    cm4.put("tx", "seq", "2");
    cm4.put("data", "x", "d");


    Iterator<Result> results = cw.write(Arrays.asList(cm2, cm3, cm4).iterator());


    int accepted = 0;
    int rejected = 0;
    int total = 0;


    while (results.hasNext()) {
      Status status = results.next().getStatus();
      if (status == Status.ACCEPTED)
        accepted++;
      if (status == Status.REJECTED)
        rejected++;
      total++;
    }


    Assert.assertEquals(1, accepted);
    Assert.assertEquals(2, rejected);
    Assert.assertEquals(3, total);


    cw.close();
  }

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      case 2:
        conn.tableOperations().addSplits(table, nss("3", "5"));
        break;
    }


    ConditionalWriter cw = conn.createConditionalWriter(table, new ConditionalWriterConfig());


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


    for (int i = 0; i < 1000; i++) {
      rows.add(new ArrayByteSequence(FastFormat.toZeroPaddedString(abs(rand.nextLong()), 16, 16, new byte[0])));
    }


    ArrayList<ConditionalMutation> mutations = new ArrayList<ConditionalMutation>();


    for (ByteSequence row : rows)
      mutations.add(new Stats(row).toMutation());


    ArrayList<ByteSequence> rows2 = new ArrayList<ByteSequence>();
    Iterator<Result> results = cw.write(mutations.iterator());
    while (results.hasNext()) {
      Result result = results.next();
      Assert.assertEquals(Status.ACCEPTED, result.getStatus());
      rows2.add(new ArrayByteSequence(result.getMutation().getRow()));
    }

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    ConditionalMutation cm1 = new ConditionalMutation("r1", new Condition("tx", "seq"));
    cm1.put("tx", "seq", "1");
    cm1.put("data", "x", "a");


    ConditionalWriter cw1 = conn2.createConditionalWriter("sect1", new ConditionalWriterConfig());
    ConditionalWriter cw2 = conn2.createConditionalWriter("sect2", new ConditionalWriterConfig());
    ConditionalWriter cw3 = conn2.createConditionalWriter("sect3", new ConditionalWriterConfig());


    Assert.assertEquals(Status.ACCEPTED, cw3.write(cm1).getStatus());


    try {
      cw1.write(cm1).getStatus();
      Assert.assertFalse(true);
    } catch (AccumuloSecurityException ase) {

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    String table = getUniqueNames(1)[0];


    conn.tableOperations().create(table);


    ConditionalWriter cw = conn.createConditionalWriter(table, new ConditionalWriterConfig().setTimeout(1, TimeUnit.SECONDS));


    ConditionalMutation cm1 = new ConditionalMutation("r1", new Condition("tx", "seq"));
    cm1.put("tx", "seq", "1");
    cm1.put("data", "x", "a");


    Assert.assertEquals(cw.write(cm1).getStatus(), Status.ACCEPTED);


    IteratorSetting is = new IteratorSetting(5, SlowIterator.class);
    SlowIterator.setSeekSleepTime(is, 1500);


    ConditionalMutation cm2 = new ConditionalMutation("r1", new Condition("tx", "seq").setValue("1").setIterators(is));
    cm2.put("tx", "seq", "2");
    cm2.put("data", "x", "b");


    Assert.assertEquals(cw.write(cm2).getStatus(), Status.UNKNOWN);


    Scanner scanner = conn.createScanner(table, Authorizations.EMPTY);


    for (Entry<Key,Value> entry : scanner) {
      String cf = entry.getKey().getColumnFamilyData().toString();
      String cq = entry.getKey().getColumnQualifierData().toString();
      String val = entry.getValue().toString();


      if (cf.equals("tx") && cq.equals("seq"))
        Assert.assertEquals("1", val);
      else if (cf.equals("data") && cq.equals("x"))
        Assert.assertEquals("a", val);
      else
        Assert.fail();
    }


    ConditionalMutation cm3 = new ConditionalMutation("r1", new Condition("tx", "seq").setValue("1"));
    cm3.put("tx", "seq", "2");
    cm3.put("data", "x", "b");


    Assert.assertEquals(cw.write(cm3).getStatus(), Status.ACCEPTED);


    cw.close();
  }

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      Assert.assertFalse(true);
    } catch (TableNotFoundException e) {}


    conn.tableOperations().create(table);


    ConditionalWriter cw = conn.createConditionalWriter(table, new ConditionalWriterConfig());


    conn.tableOperations().delete(table);


    ConditionalMutation cm1 = new ConditionalMutation("r1", new Condition("tx", "seq"));
    cm1.put("tx", "seq", "1");
    cm1.put("data", "x", "a");


    Result result = cw.write(cm1);


    try {
      result.getStatus();
      Assert.assertFalse(true);
    } catch (AccumuloException ae) {

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