Examples of org.apache.hadoop.hbase.client.ResultScanner

org.apache.hadoop.hbase.client.ResultScanner
Interface for client-side scanning. Go to {@link HTable} to obtain instances.

      scan.setStartRow(startKey);
      scan.setBatch(1);
      scan.addColumn(FAMILY_NAME, COLUMN_PREV);


      long t1 = System.currentTimeMillis();
      ResultScanner scanner = table.getScanner(scan);
      Result result = scanner.next();
      long t2 = System.currentTimeMillis();
      scanner.close();


      if ( result != null) {
        CINode node = getCINode(result, new CINode());
        System.out.printf("FSR %d %s\n", t2 - t1, Bytes.toStringBinary(node.key));
        return node;

View Full Code Here

  }


  public synchronized NavigableSet<NamespaceDescriptor> list() throws IOException {
    NavigableSet<NamespaceDescriptor> ret =
        Sets.newTreeSet(NamespaceDescriptor.NAMESPACE_DESCRIPTOR_COMPARATOR);
    ResultScanner scanner = getNamespaceTable().getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES);
    try {
      for(Result r : scanner) {
        byte[] val = CellUtil.cloneValue(r.getColumnLatestCell(
          HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES,
          HTableDescriptor.NAMESPACE_COL_DESC_BYTES));
        ret.add(ProtobufUtil.toNamespaceDescriptor(
            HBaseProtos.NamespaceDescriptor.parseFrom(val)));
      }
    } finally {
      scanner.close();
    }
    return ret;
  }

View Full Code Here

        }
        if (get(nsTable, NamespaceDescriptor.SYSTEM_NAMESPACE.getName()) == null) {
          create(nsTable, NamespaceDescriptor.SYSTEM_NAMESPACE);
        }


        ResultScanner scanner = nsTable.getScanner(HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES);
        try {
          for (Result result : scanner) {
            byte[] val =  CellUtil.cloneValue(result.getColumnLatest(
                HTableDescriptor.NAMESPACE_FAMILY_INFO_BYTES,
                HTableDescriptor.NAMESPACE_COL_DESC_BYTES));
            NamespaceDescriptor ns =
                ProtobufUtil.toNamespaceDescriptor(
                    HBaseProtos.NamespaceDescriptor.parseFrom(val));
            zkNamespaceManager.update(ns);
          }
        } finally {
          scanner.close();
        }
        initialized = true;
        return true;
      } catch (IOException ie) {
        LOG.warn("Caught exception in initializing namespace table manager", ie);

View Full Code Here

      cluster.getRegionServer(0).abort("Aborting");
      // Without patch for HBASE-6046 this test case will always timeout
      // with patch the test case should pass.
      Scan scan = new Scan();
      int numberOfRows = 0;
      ResultScanner scanner = table.getScanner(scan);
      Result[] result = scanner.next(1);
      while (result != null && result.length > 0) {
        numberOfRows++;
        result = scanner.next(1);
      }
      assertEquals("Number of rows should be equal to number of puts.", numberOfPuts,
        numberOfRows);
    } finally {
      if (table != null) table.close();

View Full Code Here

    put = new Put(ROW_4);
    put.add(COLUMN_1, QUALIFIER_1, VALUE_1);
    puts.add(put);
    remoteTable.put(puts);


    ResultScanner scanner = remoteTable.getScanner(new Scan());


    Result[] results = scanner.next(1);
    assertNotNull(results);
    assertEquals(1, results.length);
    assertTrue(Bytes.equals(ROW_1, results[0].getRow()));


    results = scanner.next(3);
    assertNotNull(results);
    assertEquals(3, results.length);
    assertTrue(Bytes.equals(ROW_2, results[0].getRow()));
    assertTrue(Bytes.equals(ROW_3, results[1].getRow()));
    assertTrue(Bytes.equals(ROW_4, results[2].getRow()));


    results = scanner.next(1);
    assertNull(results);


    scanner.close();
  }

View Full Code Here

    HTable meta = new HTable(TEST_UTIL.getConfiguration(),
        HConstants.META_TABLE_NAME);
    int rows = 0;
    Scan scan = new Scan();
    scan.addColumn(HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER);
    ResultScanner s = meta.getScanner(scan);
    for (Result r = null; (r = s.next()) != null;) {
      byte [] b =
        r.getValue(HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER);
      if (b == null || b.length <= 0) break;
      HRegionInfo hri = Writables.getHRegionInfo(b);
      // If start key, add 'aaa'.
      byte [] row = getStartKey(hri);
      Put p = new Put(row);
      p.setWriteToWAL(false);
      p.add(getTestFamily(), getTestQualifier(), row);
      t.put(p);
      rows++;
    }
    s.close();
    Assert.assertEquals(expected, rows);
    t.close();
    meta.close();
    return rows;
  }

View Full Code Here

   */
  private static int count() throws IOException {
    HTable t = new HTable(TEST_UTIL.getConfiguration(), TABLENAME);
    int rows = 0;
    Scan scan = new Scan();
    ResultScanner s = t.getScanner(scan);
    for (Result r = null; (r = s.next()) != null;) {
      rows++;
    }
    s.close();
    LOG.info("Counted=" + rows);
    t.close();
    return rows;
  }

View Full Code Here

        "org.apache.pig.backend.hadoop.hbase.HBaseStorage('"
            + TESTCOLUMN_A + " " + TESTCOLUMN_B + " "
            + TESTCOLUMN_C + "','-caster HBaseBinaryConverter')");


    HTable table = new HTable(conf, TESTTABLE_2);
    ResultScanner scanner = table.getScanner(new Scan());
    Iterator<Result> iter = scanner.iterator();
    int i = 0;
    for (i = 0; iter.hasNext(); ++i) {
      Result result = iter.next();
      String v = i + "";
      String rowKey = Bytes.toString(result.getRow());

View Full Code Here

        "org.apache.pig.backend.hadoop.hbase.HBaseStorage('"
            + TESTCOLUMN_A + " " + TESTCOLUMN_B + " "
            + TESTCOLUMN_C + "')");


    HTable table = new HTable(conf, TESTTABLE_2);
    ResultScanner scanner = table.getScanner(new Scan());
    Iterator<Result> iter = scanner.iterator();
    int i = 0;
    for (i = 0; iter.hasNext(); ++i) {
      Result result = iter.next();
      String v = i + "";
      String rowKey = new String(result.getRow());

View Full Code Here

      scan.setCaching(caching);
    }
    scan.addFamily(HConstants.CATALOG_FAMILY);
    HTable metaTable = scanRoot?
      getRootHTable(catalogTracker): getMetaHTable(catalogTracker);
    ResultScanner scanner = metaTable.getScanner(scan);
    try {
      Result data;
      while((data = scanner.next()) != null) {
        if (data.isEmpty()) continue;
        // Break if visit returns false.
        if (!visitor.visit(data)) break;
      }
    } finally {
      scanner.close();
      metaTable.close();
    }
    return;
  }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.apache.hadoop.hbase.client.ResultScanner

co.cask.cdap.data2.dataset2.lib.table.hbase.HBaseMetricsTable

com.activequant.archive.hbase.HBaseArchiveReader

com.alibaba.wasp.meta.FMetaServicesImplWithoutRetry

com.alibaba.wasp.util.ResultInHBasePrinter

com.alibaba.wasp.WaspTestingUtility

com.salesforce.hbase.index.covered.example.TestEndToEndCoveredIndexing

com.urbanairship.datacube.EmbeddedClusterTestAbstract

com.urbanairship.datacube.HBaseBackfillerTest

com.urbanairship.statshtable.StatsHTableTest

com.yahoo.omid.TestBasicTransaction

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.