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

org.apache.hadoop.hbase.client.Get
Used to perform Get operations on a single row.
To get everything for a row, instantiate a Get object with the row to get. To further define the scope of what to get, perform additional methods as outlined below.
To get all columns from specific families, execute {@link #addFamily(byte[]) addFamily}for each family to retrieve.
To get specific columns, execute {@link #addColumn(byte[],byte[]) addColumn}for each column to retrieve.
To only retrieve columns within a specific range of version timestamps, execute {@link #setTimeRange(long,long) setTimeRange}.
To only retrieve columns with a specific timestamp, execute {@link #setTimeStamp(long) setTimestamp}.
To limit the number of versions of each column to be returned, execute {@link #setMaxVersions(int) setMaxVersions}.
To add a filter, execute {@link #setFilter(Filter) setFilter}.

    private final AtomicInteger count;
    private Exception e;


    GetTillDoneOrException(final int i, final byte[] r, final AtomicBoolean d, final AtomicInteger c) {
      super("getter." + i);
      this.g = new Get(r);
      this.done = d;
      this.count = c;
    }

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      for (Store store : region.getStores().values()) {
        maxSeqIdInStores.put(store.getColumnFamilyName().getBytes(), minSeqId - 1);
      }
      long seqId = region.replayRecoveredEditsIfAny(regiondir, maxSeqIdInStores, null, status);
      assertEquals(maxSeqId, seqId);
      Get get = new Get(row);
      Result result = region.get(get);
      for (long i = minSeqId; i <= maxSeqId; i += 10) {
        List<Cell> kvs = result.getColumnCells(family, Bytes.toBytes(i));
        assertEquals(1, kvs.size());
        assertArrayEquals(Bytes.toBytes(i), CellUtil.cloneValue(kvs.get(0)));

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      for (Store store : region.getStores().values()) {
        maxSeqIdInStores.put(store.getColumnFamilyName().getBytes(), recoverSeqId - 1);
      }
      long seqId = region.replayRecoveredEditsIfAny(regiondir, maxSeqIdInStores, null, status);
      assertEquals(maxSeqId, seqId);
      Get get = new Get(row);
      Result result = region.get(get);
      for (long i = minSeqId; i <= maxSeqId; i += 10) {
        List<Cell> kvs = result.getColumnCells(family, Bytes.toBytes(i));
        if (i < recoverSeqId) {
          assertEquals(0, kvs.size());

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      assertEquals(1, region.getStore(family).getStorefilesCount());
      files = FSUtils.listStatus(fs, tmpDir);
      assertTrue("Expected to find 0 files inside " + tmpDir, files == null || files.length == 0);


      for (long i = minSeqId; i < maxSeqId; i++) {
        Get get = new Get(Bytes.toBytes(i));
        Result result = region.get(get);
        byte[] value = result.getValue(family, Bytes.toBytes(i));
        assertArrayEquals(Bytes.toBytes(i), value);
      }
    } finally {

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      boolean res = region.checkAndMutate(row1, fam1, qf1, CompareOp.EQUAL, new BinaryComparator(
          val1), put, true);
      assertEquals(true, res);
      store.memstore.kvset.size();


      Get get = new Get(row1);
      get.addColumn(fam2, qf1);
      Cell[] actual = region.get(get).rawCells();


      Cell[] expected = { kv };


      assertEquals(expected.length, actual.length);

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      delete.deleteColumn(fam1, qf3);
      boolean res = region.checkAndMutate(row1, fam1, qf1, CompareOp.EQUAL, new BinaryComparator(
          val2), delete, true);
      assertEquals(true, res);


      Get get = new Get(row1);
      get.addColumn(fam1, qf1);
      get.addColumn(fam1, qf3);
      get.addColumn(fam2, qf2);
      Result r = region.get(get);
      assertEquals(2, r.size());
      assertArrayEquals(val1, r.getValue(fam1, qf1));
      assertArrayEquals(val2, r.getValue(fam2, qf2));


      // Family delete
      delete = new Delete(row1);
      delete.deleteFamily(fam2);
      res = region.checkAndMutate(row1, fam2, qf1, CompareOp.EQUAL, new BinaryComparator(emptyVal),
          delete, true);
      assertEquals(true, res);


      get = new Get(row1);
      r = region.get(get);
      assertEquals(1, r.size());
      assertArrayEquals(val1, r.getValue(fam1, qf1));


      // Row delete
      delete = new Delete(row1);
      res = region.checkAndMutate(row1, fam1, qf1, CompareOp.EQUAL, new BinaryComparator(val1),
          delete, true);
      assertEquals(true, res);
      get = new Get(row1);
      r = region.get(get);
      assertEquals(0, r.size());
    } finally {
      HRegion.closeHRegion(this.region);
      this.region = null;

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      Delete delete = new Delete(row1);
      delete.deleteColumn(fam1, qual);
      delete.deleteColumn(fam1, qual);
      region.delete(delete);


      Get get = new Get(row1);
      get.addFamily(fam1);
      Result r = region.get(get);
      assertEquals(0, r.size());
    } finally {
      HRegion.closeHRegion(this.region);
      this.region = null;

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      Delete delete = new Delete(row);
      delete.deleteColumns(fam, splitA);
      region.delete(delete);


      // assert some things:
      Get get = new Get(row).addColumn(fam, serverinfo);
      Result result = region.get(get);
      assertEquals(1, result.size());


      get = new Get(row).addColumn(fam, splitA);
      result = region.get(get);
      assertEquals(0, result.size());


      get = new Get(row).addColumn(fam, splitB);
      result = region.get(get);
      assertEquals(1, result.size());


      // Assert that after a delete, I can put.
      put = new Put(row);
      put.add(fam, splitA, Bytes.toBytes("reference_A"));
      region.put(put);
      get = new Get(row);
      result = region.get(get);
      assertEquals(3, result.size());


      // Now delete all... then test I can add stuff back
      delete = new Delete(row);

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      // now delete something in the present
      Delete delete = new Delete(row);
      region.delete(delete);


      // make sure we still see our data
      Get get = new Get(row).addColumn(fam, serverinfo);
      Result result = region.get(get);
      assertEquals(1, result.size());


      // delete the future row
      delete = new Delete(row, HConstants.LATEST_TIMESTAMP - 3);
      region.delete(delete);


      // make sure it is gone
      get = new Get(row).addColumn(fam, serverinfo);
      result = region.get(get);
      assertEquals(0, result.size());
    } finally {
      HRegion.closeHRegion(this.region);
      this.region = null;

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      Put put = new Put(row);
      put.add(fam, qual, HConstants.LATEST_TIMESTAMP, Bytes.toBytes("value"));
      region.put(put);


      // Make sure it shows up with an actual timestamp
      Get get = new Get(row).addColumn(fam, qual);
      Result result = region.get(get);
      assertEquals(1, result.size());
      Cell kv = result.rawCells()[0];
      LOG.info("Got: " + kv);
      assertTrue("LATEST_TIMESTAMP was not replaced with real timestamp",
          kv.getTimestamp() != HConstants.LATEST_TIMESTAMP);


      // Check same with WAL enabled (historically these took different
      // code paths, so check both)
      row = Bytes.toBytes("row2");
      put = new Put(row);
      put.add(fam, qual, HConstants.LATEST_TIMESTAMP, Bytes.toBytes("value"));
      region.put(put);


      // Make sure it shows up with an actual timestamp
      get = new Get(row).addColumn(fam, qual);
      result = region.get(get);
      assertEquals(1, result.size());
      kv = result.rawCells()[0];
      LOG.info("Got: " + kv);
      assertTrue("LATEST_TIMESTAMP was not replaced with real timestamp",

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