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

org.apache.hadoop.hbase.client.HTableInterface
Used to communicate with a single HBase table. @since 0.21.0

    /**
     * Test that the wrapped ResultScanner.next(int) works, and also ResultScanner.close()
     */
    @Test
    public void testResultScannerIteratorHasNext() throws Exception {
        HTableInterface hTable = getHTable();
        byte[] row = randomRowKey();


        Put put = new Put(row);
        put.add(cf, row, row);
        hTable.put(put);


        ResultScanner rs = hTable.getScanner(new Scan());


        Assert.assertTrue(rs.iterator().hasNext());


        rs.close();

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    /**
     * Test getScanner(byte[] family)
     */
    @Test
    public void testGetScannerCfName() throws Exception {
        HTableInterface hTable = getHTable();
        byte[] row = randomRowKey();


        Put put = new Put(row);
        put.add(cf, row, row);
        hTable.put(put);


        ResultScanner rs = hTable.getScanner(cf);


        Assert.assertNotNull(rs.next());


        assertMetricsUpdated(OpType.PUT, OpType.GET_SCANNER, OpType.RESULTSCANNER_NEXT);

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   /**
    * Test getScanner(byte[] family)
    */
   @Test
   public void testGetScannerCfAndQual() throws Exception {
       HTableInterface hTable = getHTable();
       byte[] row = randomRowKey();
       byte[] qual = randomRowKey();


       Put put = new Put(row);
       put.add(cf, qual, row);
       hTable.put(put);


       ResultScanner rs = hTable.getScanner(cf, qual);


       Assert.assertNotNull(rs.next());


       assertMetricsUpdated(OpType.PUT, OpType.GET_SCANNER, OpType.RESULTSCANNER_NEXT);

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       rs.close();
   }
   
   @Test
   public void testMultiPut() throws Exception {
       HTableInterface hTable = getHTable();
       List<byte[]> rows = getRandomRows(2); 


       Put put1 = new Put(rows.get(0));
       Put put2 = new Put(rows.get(1));
       put1.add(cf, rows.get(0), rows.get(0));
       put2.add(cf, rows.get(1), rows.get(1));
       hTable.put(ImmutableList.of(put1, put2));


       ResultScanner rs = hTable.getScanner(cf);
       Result[] results = rs.next(2);
       Assert.assertArrayEquals(rows.get(0), results[0].getRow());
       Assert.assertArrayEquals(rows.get(1), results[1].getRow());
       
       assertMetricsUpdated(OpType.MULTIPUT, OpType.RESULTSCANNER_NEXTARRAY,

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       rs.close();
   }
   
   @Test
   public void testcheckAndPut() throws Exception {
       HTableInterface hTable = getHTable();
       byte[] row = randomRowKey();
       Put put = new Put(row);
       put.add(cf, row, row);
       hTable.put(put);


       Put newPut = new Put(row);
       byte[] randBytes = randomRowKey();
       newPut.add(cf, randBytes, randBytes);
       hTable.checkAndPut(row, cf, row, row, newPut);


       Result result = hTable.get(new Get(row));
       Assert.assertEquals(2, result.list().size());
       
       assertMetricsUpdated(OpType.PUT, OpType.CHECK_AND_PUT, OpType.GET);
   }

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       assertMetricsUpdated(OpType.PUT, OpType.CHECK_AND_PUT, OpType.GET);
   }


   @Test
   public void testDelete() throws Exception {
       HTableInterface hTable = getHTable();
       byte[] row = randomRowKey();
       Put put = new Put(row);
       put.add(cf, row, row);
       hTable.put(put);


       hTable.delete(new Delete(row));
       
       Assert.assertTrue(hTable.get(new Get(row)).isEmpty());
       
       assertMetricsUpdated(OpType.PUT, OpType.GET, OpType.DELETE);
   }

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       assertMetricsUpdated(OpType.PUT, OpType.GET, OpType.DELETE);
   }
   
   @Test
   public void testMultiDelete() throws Exception {
       HTableInterface hTable = getHTable();
       
       final int ROWS_TO_INSERT = 5;
       
       List<byte[]> rows = getRandomRows(ROWS_TO_INSERT);
       for(byte[] row: rows) {
           Put put = new Put(row);
           put.add(cf, row, row);
           hTable.put(put);
       }


       ResultScanner rs = hTable.getScanner(new Scan());
       int countRows = 0;
       while(rs.next() != null) {
           countRows++;
       }
       rs.close();
       Assert.assertEquals(ROWS_TO_INSERT, countRows);
       
       List<Delete> deletes = new ArrayList<Delete>();
       for(byte[] row: rows) {
           deletes.add(new Delete(row));
       }
       hTable.delete(deletes);
       
       rs = hTable.getScanner(new Scan());
       countRows = 0;
       while(rs.next() != null) {
           countRows++;
       }
       Assert.assertEquals(0, countRows);

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   }
   
   @Test
   public void testCheckAndDelete() throws Exception {
       HTableInterface hTable = getHTable();
       byte[] row = randomRowKey();
       Put put = new Put(row);
       put.add(cf, row, row);
       hTable.put(put);


       hTable.checkAndDelete(row, cf, row, row, new Delete(row));


       Assert.assertTrue(hTable.get(new Get(row)).isEmpty());
       assertMetricsUpdated(OpType.PUT, OpType.CHECK_AND_DELETE, OpType.GET);


   }

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   }
   
   @Test
   public void testIcv() throws Exception {
       HTableInterface hTable = getHTable();
       byte[] row = randomRowKey();
       Put put = new Put(row);
       put.add(cf, row, Bytes.toBytes(10L));
       hTable.put(put);


       hTable.incrementColumnValue(row, cf, row, 5);


       Result result = hTable.get(new Get(row));
       Assert.assertEquals(15L, Bytes.toLong(result.value()));
       assertMetricsUpdated(OpType.PUT, OpType.INCREMENT, OpType.GET);


   }

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   }


   @Test
   public void testIcvWithWal() throws Exception {
       HTableInterface hTable = getHTable();
       byte[] row = randomRowKey();
       Put put = new Put(row);
       put.add(cf, row, Bytes.toBytes(10L));
       hTable.put(put);


       hTable.incrementColumnValue(row, cf, row, 5, true);


       Result result = hTable.get(new Get(row));
       Assert.assertEquals(15L, Bytes.toLong(result.value()));
       assertMetricsUpdated(OpType.PUT, OpType.INCREMENT, OpType.GET);


   }

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