Package com.youtube.vitess.vtgate.cursor

Examples of com.youtube.vitess.vtgate.cursor.Cursor

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  public static void waitForTablet(String tabletType, int rowCount, int attempts, TestEnv testEnv)
      throws Exception {
    String sql = "select * from vtgate_test";
    VtGate vtgate = VtGate.connect("localhost:" + testEnv.port, 0);
    for (int i = 0; i < attempts; i++) {
      Cursor cursor = vtgate.execute(new QueryBuilder(sql, testEnv.keyspace, tabletType)
          .setKeyspaceIds(testEnv.getAllKeyspaceIds()).build());
      if (cursor.getRowsAffected() >= rowCount) {
        vtgate.close();
        return;
      }
      Thread.sleep(1000);
    }
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    // Ensure empty table
    String selectSql = "select * from vtgate_test";
    Query allRowsQuery = new QueryBuilder(selectSql, testEnv.keyspace, "master").setKeyspaceIds(
        testEnv.getAllKeyspaceIds()).build();
    Cursor cursor = vtgate.execute(allRowsQuery);
    Assert.assertEquals(CursorImpl.class, cursor.getClass());
    Assert.assertEquals(0, cursor.getRowsAffected());
    Assert.assertEquals(0, cursor.getLastRowId());
    Assert.assertFalse(cursor.hasNext());
    vtgate.close();

    // Insert 10 rows
    Util.insertRows(testEnv, 1000, 10);

    vtgate = VtGate.connect("localhost:" + testEnv.port, 0);
    cursor = vtgate.execute(allRowsQuery);
    Assert.assertEquals(10, cursor.getRowsAffected());
    Assert.assertEquals(0, cursor.getLastRowId());
    Assert.assertTrue(cursor.hasNext());

    // Fetch all rows from the first shard
    KeyspaceId firstKid = testEnv.getAllKeyspaceIds().get(0);
    Query query =
        new QueryBuilder(selectSql, testEnv.keyspace, "master").addKeyspaceId(firstKid).build();
    cursor = vtgate.execute(query);

    // Check field types and values
    Row row = cursor.next();
    Cell idCell = row.next();
    Assert.assertEquals("id", idCell.getName());
    Assert.assertEquals(UnsignedLong.class, idCell.getType());
    UnsignedLong id = row.getULong(idCell.getName());

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    String allRowsSql = "select * from vtgate_test";

    for (String shardName : testEnv.shardKidMap.keySet()) {
      Query shardRows = new QueryBuilder(allRowsSql, testEnv.keyspace, "master").setKeyspaceIds(
          testEnv.getKeyspaceIds(shardName)).build();
      Cursor cursor = vtgate.execute(shardRows);
      Assert.assertEquals(10, cursor.getRowsAffected());
    }
    vtgate.close();
  }
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    Util.insertRows(testEnv, 1000, 10);
    VtGate vtgate = VtGate.connect("localhost:" + testEnv.port, 0);
    String selectSql = "select * from vtgate_test";
    Query allRowsQuery =
        new QueryBuilder(selectSql, testEnv.keyspace, "master").addKeyRange(KeyRange.ALL).build();
    Cursor cursor = vtgate.execute(allRowsQuery);
    // Verify all rows returned
    Assert.assertEquals(10, cursor.getRowsAffected());
    vtgate.close();
  }
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    String selectSql = "select * from vtgate_test";

    // Check ALL KeyRange query returns rows from both shards
    Query allRangeQuery =
        new QueryBuilder(selectSql, testEnv.keyspace, "master").addKeyRange(KeyRange.ALL).build();
    Cursor cursor = vtgate.execute(allRangeQuery);
    Assert.assertEquals(rowsPerShard * 2, cursor.getRowsAffected());

    // Check KeyRange query limited to a single shard returns 10 rows each
    for (String shardName : testEnv.shardKidMap.keySet()) {
      List<KeyspaceId> shardKids = testEnv.getKeyspaceIds(shardName);
      KeyspaceId minKid = Collections.min(shardKids);
      KeyspaceId maxKid = Collections.max(shardKids);
      KeyRange shardKeyRange = new KeyRange(minKid, maxKid);
      Query shardRangeQuery = new QueryBuilder(selectSql, testEnv.keyspace, "master").addKeyRange(
          shardKeyRange).build();
      cursor = vtgate.execute(shardRangeQuery);
      Assert.assertEquals(rowsPerShard, cursor.getRowsAffected());
    }

    // Now make a cross-shard KeyRange and check all rows are returned
    Iterator<String> shardNameIter = testEnv.shardKidMap.keySet().iterator();
    KeyspaceId kidShard1 = testEnv.getKeyspaceIds(shardNameIter.next()).get(2);
    KeyspaceId kidShard2 = testEnv.getKeyspaceIds(shardNameIter.next()).get(2);
    KeyRange crossShardKeyrange;
    if (kidShard1.compareTo(kidShard2) < 0) {
      crossShardKeyrange = new KeyRange(kidShard1, kidShard2);
    } else {
      crossShardKeyrange = new KeyRange(kidShard2, kidShard1);
    }
    Query shardRangeQuery = new QueryBuilder(selectSql, testEnv.keyspace, "master").addKeyRange(
        crossShardKeyrange).build();
    cursor = vtgate.execute(shardRangeQuery);
    Assert.assertEquals(rowsPerShard * 2, cursor.getRowsAffected());
    vtgate.close();
  }
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    // Check 40 rows exist in total
    vtgate = VtGate.connect("localhost:" + testEnv.port, 0);
    String selectSql = "select * from vtgate_test";
    Query allRowsQuery = new QueryBuilder(selectSql, testEnv.keyspace, "master").setKeyspaceIds(
        testEnv.getAllKeyspaceIds()).build();
    Cursor cursor = vtgate.execute(allRowsQuery);
    Assert.assertEquals(count * 2, cursor.getRowsAffected());

    // Check 20 rows exist per shard
    for (String shardName : testEnv.shardKidMap.keySet()) {
      Query shardRows = new QueryBuilder(selectSql, testEnv.keyspace, "master").setKeyspaceIds(
          testEnv.getKeyspaceIds(shardName)).build();
      cursor = vtgate.execute(shardRows);
      Assert.assertEquals(count, cursor.getRowsAffected());
    }

    vtgate.close();
  }
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Related Classes of com.youtube.vitess.vtgate.cursor.Cursor

  • com.youtube.vitess.vtgate.BsonifyTest
  • com.youtube.vitess.vtgate.integration.DataTypesIT
  • com.youtube.vitess.vtgate.integration.StreamingServerShutdownIT
  • com.youtube.vitess.vtgate.integration.StreamingVtGateIT
  • com.youtube.vitess.vtgate.integration.util.Util
  • com.youtube.vitess.vtgate.integration.VtGateIT
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