Examples of org.apache.accumulo.core.client.IteratorSetting$Column

org.apache.accumulo.core.client.IteratorSetting
A convenience class for passing column family and column qualifiers to iterator configuration methods.

    BatchWriter bw = conn.createBatchWriter("table1", new BatchWriterConfig());


    for (Mutation m : createMutations()) {
      bw.addMutation(m);
    }
    IteratorSetting is = new IteratorSetting(40, SummingRowFilter.class);
    conn.tableOperations().attachIterator("table1", is);


    Scanner scanner = conn.createScanner("table1", Constants.NO_AUTHS);
    assertEquals(new HashSet<String>(Arrays.asList("2", "3")), getRows(scanner));

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    conn.tableOperations().create("chained_row_filters");
    BatchWriter bw = conn.createBatchWriter("chained_row_filters", new BatchWriterConfig());
    for (Mutation m : createMutations()) {
      bw.addMutation(m);
    }
    conn.tableOperations().attachIterator("chained_row_filters", new IteratorSetting(40, "trueFilter1", TrueFilter.class));
    conn.tableOperations().attachIterator("chained_row_filters", new IteratorSetting(41, "trueFilter2", TrueFilter.class));
    Scanner scanner = conn.createScanner("chained_row_filters", Constants.NO_AUTHS);
    assertEquals(new HashSet<String>(Arrays.asList("0", "1", "2", "3", "4")), getRows(scanner));
  }

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    conn.tableOperations().create("filter_conjunction");
    BatchWriter bw = conn.createBatchWriter("filter_conjunction", new BatchWriterConfig());
    for (Mutation m : createMutations()) {
      bw.addMutation(m);
    }
    conn.tableOperations().attachIterator("filter_conjunction", new IteratorSetting(40, "rowZeroOrOne", RowZeroOrOneFilter.class));
    conn.tableOperations().attachIterator("filter_conjunction", new IteratorSetting(41, "rowOneOrTwo", RowOneOrTwoFilter.class));
    Scanner scanner = conn.createScanner("filter_conjunction", Constants.NO_AUTHS);
    assertEquals(new HashSet<String>(Arrays.asList("1")), getRows(scanner));
  }

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    conn.securityOperations().createLocalUser("user1", new PasswordToken("pass1"));
    conn.securityOperations().changeUserAuthorizations("user1", new Authorizations("A", "B"));
    conn.securityOperations().grantTablePermission("user1", "table1", TablePermission.WRITE);
    conn.securityOperations().grantTablePermission("user1", "table1", TablePermission.READ);
    
    IteratorSetting is = new IteratorSetting(10, SummingCombiner.class);
    SummingCombiner.setEncodingType(is, LongCombiner.Type.STRING);
    SummingCombiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("META", "COUNT")));
    
    conn.tableOperations().attachIterator("table1", is);

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    FileUtils.copyURLToFile(this.getClass().getResource("/FooFilter.jar"), jarFile);
    jarFile.deleteOnExit();
    
    conn.instanceOperations().setProperty(Property.VFS_CONTEXT_CLASSPATH_PROPERTY.getKey() + "cx1", jarFile.toURI().toString());
    conn.tableOperations().setProperty("table2", Property.TABLE_CLASSPATH.getKey(), "cx1");
    conn.tableOperations().attachIterator("table2", new IteratorSetting(100, "foocensor", "org.apache.accumulo.test.FooFilter"));
    
    BatchWriter bw = conn.createBatchWriter("table2", new BatchWriterConfig());
    
    Mutation m1 = new Mutation("foo");
    m1.put("cf1", "cq1", "v2");

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    CombinerTest.nkv(tm1, 1, 1, 1, 1, false, new BigDecimal(2), encoder);
    CombinerTest.nkv(tm1, 1, 1, 1, 2, false, new BigDecimal(2.3), encoder);
    CombinerTest.nkv(tm1, 1, 1, 1, 3, false, new BigDecimal(-1.4E1), encoder);
    
    Combiner ai = new BigDecimalCombiner.BigDecimalSummingCombiner();
    IteratorSetting is = new IteratorSetting(1, BigDecimalCombiner.BigDecimalSummingCombiner.class);
    Combiner.setColumns(is, Collections.singletonList(new IteratorSetting.Column("cf001")));


    ai.init(new SortedMapIterator(tm1), is.getOptions(), null);
    ai.seek(new Range(), EMPTY_COL_FAMS, false);
    
    assertTrue(ai.hasTop());
    assertEquals(CombinerTest.nk(1, 1, 1, 3), ai.getTopKey());
    assertEquals(-9.7, encoder.decode(ai.getTopValue().get()).doubleValue(),delta);

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    fetchedColumns.add(new Pair<Text,Text>(new Text("colf1"), new Text("colq1")));
    fetchedColumns.add(new Pair<Text,Text>(new Text("colf2"), new Text("colq2")));


    // Fake some iterators
    ArrayList<IteratorSetting> iterators = new ArrayList<IteratorSetting>();
    IteratorSetting setting = new IteratorSetting(50, SummingCombiner.class);
    setting.addOption("foo", "bar");
    iterators.add(setting);


    setting = new IteratorSetting(100, WholeRowIterator.class);
    setting.addOption("bar", "foo");
    iterators.add(setting);
    
    split.setAuths(new Authorizations("foo"));
    split.setOffline(true);
    split.setIsolatedScan(true);

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  @Test
  public void testAttachIterator() throws Exception {
    Tester t = new Tester();
    Map<String,String> empty = Collections.emptyMap();
    t.attachIterator("table", new IteratorSetting(10, "someName", "foo.bar", empty), EnumSet.of(IteratorScope.scan));
    t.check("table", new String[] {"table.iterator.scan.someName=10,foo.bar",});
    t.removeIterator("table", "someName", EnumSet.of(IteratorScope.scan));
    t.check("table", new String[] {});


    IteratorSetting setting = new IteratorSetting(10, "someName", "foo.bar");
    setting.addOptions(Collections.singletonMap("key", "value"));
    t.attachIterator("table", setting, EnumSet.of(IteratorScope.majc));
    setting = new IteratorSetting(10, "someName", "foo.bar");
    t.attachIterator("table", setting, EnumSet.of(IteratorScope.scan));
    t.check("table", new String[] {"table.iterator.majc.someName=10,foo.bar", "table.iterator.majc.someName.opt.key=value",
        "table.iterator.scan.someName=10,foo.bar",});


    t.removeIterator("table", "someName", EnumSet.of(IteratorScope.scan));
    setting = new IteratorSetting(20, "otherName", "some.classname");
    setting.addOptions(Collections.singletonMap("key", "value"));
    t.attachIterator("table", setting, EnumSet.of(IteratorScope.majc));
    setting = new IteratorSetting(20, "otherName", "some.classname");
    t.attachIterator("table", setting, EnumSet.of(IteratorScope.scan));
    Map<String,EnumSet<IteratorScope>> two = t.listIterators("table");
    Assert.assertEquals(2, two.size());
    Assert.assertTrue(two.containsKey("otherName"));
    Assert.assertTrue(two.get("otherName").size() == 2);
    Assert.assertTrue(two.get("otherName").contains(IteratorScope.majc));
    Assert.assertTrue(two.get("otherName").contains(IteratorScope.scan));
    Assert.assertTrue(two.containsKey("someName"));
    Assert.assertTrue(two.get("someName").size() == 1);
    Assert.assertTrue(two.get("someName").contains(IteratorScope.majc));
    t.removeIterator("table", "someName", EnumSet.allOf(IteratorScope.class));
    t.check("table", new String[] {"table.iterator.majc.otherName=20,some.classname", "table.iterator.majc.otherName.opt.key=value",
        "table.iterator.scan.otherName=20,some.classname",});


    setting = t.getIteratorSetting("table", "otherName", IteratorScope.scan);
    Assert.assertEquals(20, setting.getPriority());
    Assert.assertEquals("some.classname", setting.getIteratorClass());
    Assert.assertTrue(setting.getOptions().isEmpty());
    setting = t.getIteratorSetting("table", "otherName", IteratorScope.majc);
    Assert.assertEquals(20, setting.getPriority());
    Assert.assertEquals("some.classname", setting.getIteratorClass());
    Assert.assertFalse(setting.getOptions().isEmpty());
    Assert.assertEquals(Collections.singletonMap("key", "value"), setting.getOptions());
    t.attachIterator("table", setting, EnumSet.of(IteratorScope.minc));
    t.check("table", new String[] {"table.iterator.majc.otherName=20,some.classname", "table.iterator.majc.otherName.opt.key=value",
        "table.iterator.minc.otherName=20,some.classname", "table.iterator.minc.otherName.opt.key=value", "table.iterator.scan.otherName=20,some.classname",});


    try {
      t.attachIterator("table", setting);
      Assert.fail();
    } catch (AccumuloException e) {}
    setting.setName("thirdName");
    try {
      t.attachIterator("table", setting);
      Assert.fail();
    } catch (AccumuloException e) {}
    setting.setPriority(10);
    t.setProperty("table", "table.iterator.minc.thirdName.opt.key", "value");
    try {
      t.attachIterator("table", setting);
      Assert.fail();
    } catch (AccumuloException e) {}

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   */
  @Test
  public void testSetIterator() throws IOException {
    JobConf job = new JobConf();
    
    IteratorSetting is = new IteratorSetting(1, "WholeRow", "org.apache.accumulo.core.iterators.WholeRowIterator");
    AccumuloInputFormat.addIterator(job, is);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    is.write(new DataOutputStream(baos));
    String iterators = job.get("AccumuloInputFormat.ScanOpts.Iterators");
    assertEquals(new String(Base64.encodeBase64(baos.toByteArray())), iterators);
  }

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  @Test
  public void testAddIterator() throws IOException {
    JobConf job = new JobConf();
    
    AccumuloInputFormat.addIterator(job, new IteratorSetting(1, "WholeRow", WholeRowIterator.class));
    AccumuloInputFormat.addIterator(job, new IteratorSetting(2, "Versions", "org.apache.accumulo.core.iterators.VersioningIterator"));
    IteratorSetting iter = new IteratorSetting(3, "Count", "org.apache.accumulo.core.iterators.CountingIterator");
    iter.addOption("v1", "1");
    iter.addOption("junk", "\0omg:!\\xyzzy");
    AccumuloInputFormat.addIterator(job, iter);
    
    List<IteratorSetting> list = AccumuloInputFormat.getIterators(job);
    
    // Check the list size
    assertTrue(list.size() == 3);
    
    // Walk the list and make sure our settings are correct
    IteratorSetting setting = list.get(0);
    assertEquals(1, setting.getPriority());
    assertEquals("org.apache.accumulo.core.iterators.user.WholeRowIterator", setting.getIteratorClass());
    assertEquals("WholeRow", setting.getName());
    assertEquals(0, setting.getOptions().size());
    
    setting = list.get(1);
    assertEquals(2, setting.getPriority());
    assertEquals("org.apache.accumulo.core.iterators.VersioningIterator", setting.getIteratorClass());
    assertEquals("Versions", setting.getName());
    assertEquals(0, setting.getOptions().size());
    
    setting = list.get(2);
    assertEquals(3, setting.getPriority());
    assertEquals("org.apache.accumulo.core.iterators.CountingIterator", setting.getIteratorClass());
    assertEquals("Count", setting.getName());
    assertEquals(2, setting.getOptions().size());
    assertEquals("1", setting.getOptions().get("v1"));
    assertEquals("\0omg:!\\xyzzy", setting.getOptions().get("junk"));
  }

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