How to use

getMetadata

method

in

io.prestosql.spi.connector.Connector

public ConnectorTransactionMetadata(ConnectorId connectorId, Connector connector, ConnectorTransactionHandle transactionHandle)
{
  this.connectorId = requireNonNull(connectorId, "connectorId is null");
  this.connector = requireNonNull(connector, "connector is null");
  this.transactionHandle = requireNonNull(transactionHandle, "transactionHandle is null");
  this.connectorMetadata = connector.getMetadata(transactionHandle);
}

public ConnectorTransactionMetadata(ConnectorId connectorId, Connector connector, ConnectorTransactionHandle transactionHandle)
{
  this.connectorId = requireNonNull(connectorId, "connectorId is null");
  this.connector = requireNonNull(connector, "connector is null");
  this.transactionHandle = requireNonNull(transactionHandle, "transactionHandle is null");
  this.connectorMetadata = connector.getMetadata(transactionHandle);
}

private static void assertCreateConnector(String metastoreUri)
{
  HiveConnectorFactory connectorFactory = new HiveConnectorFactory(
      "hive-test",
      HiveConnector.class.getClassLoader(),
      Optional.empty());
  Map<String, String> config = ImmutableMap.<String, String>builder()
      .put("hive.metastore.uri", metastoreUri)
      .build();
  Connector connector = connectorFactory.create("hive-test", config, new TestingConnectorContext());
  ConnectorTransactionHandle transaction = connector.beginTransaction(READ_UNCOMMITTED, true);
  assertInstanceOf(connector.getMetadata(transaction), ClassLoaderSafeConnectorMetadata.class);
  assertInstanceOf(connector.getSplitManager(), ClassLoaderSafeConnectorSplitManager.class);
  assertInstanceOf(connector.getPageSourceProvider(), ConnectorPageSourceProvider.class);
  connector.commit(transaction);
}

private static void assertCreateConnector(String metastoreUri)
{
  HiveConnectorFactory connectorFactory = new HiveConnectorFactory(
      "hive-test",
      HiveConnector.class.getClassLoader(),
      Optional.empty());
  Map<String, String> config = ImmutableMap.<String, String>builder()
      .put("hive.metastore.uri", metastoreUri)
      .build();
  Connector connector = connectorFactory.create("hive-test", config, new TestingConnectorContext());
  ConnectorTransactionHandle transaction = connector.beginTransaction(READ_UNCOMMITTED, true);
  assertInstanceOf(connector.getMetadata(transaction), ClassLoaderSafeConnectorMetadata.class);
  assertInstanceOf(connector.getSplitManager(), ClassLoaderSafeConnectorSplitManager.class);
  assertInstanceOf(connector.getPageSourceProvider(), ConnectorPageSourceProvider.class);
  connector.commit(transaction);
}

@BeforeClass
public void setup()
    throws Exception
{
  EmbeddedCassandra.start();
  String keyspace = "test_connector";
  createTestTables(EmbeddedCassandra.getSession(), keyspace, DATE);
  String connectorId = "cassandra-test";
  CassandraConnectorFactory connectorFactory = new CassandraConnectorFactory(connectorId);
  Connector connector = connectorFactory.create(connectorId, ImmutableMap.of(
      "cassandra.contact-points", EmbeddedCassandra.getHost(),
      "cassandra.native-protocol-port", Integer.toString(EmbeddedCassandra.getPort())),
      new TestingConnectorContext());
  metadata = connector.getMetadata(CassandraTransactionHandle.INSTANCE);
  assertInstanceOf(metadata, CassandraMetadata.class);
  splitManager = connector.getSplitManager();
  assertInstanceOf(splitManager, CassandraSplitManager.class);
  recordSetProvider = connector.getRecordSetProvider();
  assertInstanceOf(recordSetProvider, CassandraRecordSetProvider.class);
  database = keyspace;
  table = new SchemaTableName(database, TABLE_ALL_TYPES.toLowerCase(ENGLISH));
  tableUnpartitioned = new SchemaTableName(database, "presto_test_unpartitioned");
  invalidTable = new SchemaTableName(database, "totally_invalid_table_name");
}