# Interface XADataSource

All Superinterfaces:
  `CommonDataSource`

public interface XADataSource extends CommonDataSource
A factory for `XAConnection` objects that is used internally. An object that implements the `XADataSource` interface is typically registered with a naming service that uses the Java Naming and Directory Interface (JNDI).

An implementation of `XADataSource` must include a public no-arg constructor.

Since:
  1.4

- ## Method Summary

  Modifier and Type
  Method
  Description
  `default XAConnectionBuilder`
  `createXAConnectionBuilder()`
  Creates a new `XAConnectionBuilder` instance
  `int`
  `getLoginTimeout()`
  Gets the maximum time in seconds that this data source can wait while attempting to connect to a database.
  `PrintWriter`
  `getLogWriter()`
  Retrieves the log writer for this `DataSource` object.
  `XAConnection`
  `getXAConnection()`
  Attempts to establish a physical database connection that can be used in a distributed transaction.
  `XAConnection`
  `getXAConnection(String user, String password)`
  Attempts to establish a physical database connection, using the given user name and password.
  `void`
  `setLoginTimeout(int seconds)`
  Sets the maximum time in seconds that this data source will wait while attempting to connect to a database.
  `void`
  `setLogWriter(PrintWriter out)`
  Sets the log writer for this `DataSource` object to the given `java.io.PrintWriter` object.

  ### Methods declared in interface CommonDataSource

  `createShardingKeyBuilder, getParentLogger`

- ## Method Details

  - ### getXAConnection

    XAConnection getXAConnection() throws SQLException
    Attempts to establish a physical database connection that can be used in a distributed transaction.
    Returns:
      an `XAConnection` object, which represents a physical connection to a data source, that can be used in a distributed transaction
    Throws:
      `SQLException` - if a database access error occurs
      `SQLFeatureNotSupportedException` - if the JDBC driver does not support this method
      `SQLTimeoutException` - when the driver has determined that the timeout value specified by the `setLoginTimeout` method has been exceeded and has at least tried to cancel the current database connection attempt
    Since:
      1.4

  - ### getXAConnection

    XAConnection getXAConnection(String user, String password) throws SQLException
    Attempts to establish a physical database connection, using the given user name and password. The connection that is returned is one that can be used in a distributed transaction.
    Parameters:
      `user` - the database user on whose behalf the connection is being made
      `password` - the user's password
    Returns:
      an `XAConnection` object, which represents a physical connection to a data source, that can be used in a distributed transaction
    Throws:
      `SQLException` - if a database access error occurs
      `SQLFeatureNotSupportedException` - if the JDBC driver does not support this method
      `SQLTimeoutException` - when the driver has determined that the timeout value specified by the `setLoginTimeout` method has been exceeded and has at least tried to cancel the current database connection attempt
    Since:
      1.4

  - ### getLogWriter

    PrintWriter getLogWriter() throws SQLException

    Retrieves the log writer for this `DataSource` object.

    The log writer is a character output stream to which all logging and tracing messages for this data source will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. Messages printed to a data source specific log writer are not printed to the log writer associated with the `java.sql.DriverManager` class. When a `DataSource` object is created, the log writer is initially null; in other words, the default is for logging to be disabled.

    Specified by:
      `getLogWriter` in interface `CommonDataSource`
    Returns:
      the log writer for this data source or null if logging is disabled
    Throws:
      `SQLException` - if a database access error occurs
    Since:
      1.4
    See Also:
      - `CommonDataSource.setLogWriter(PrintWriter)`

  - ### setLogWriter

    void setLogWriter(PrintWriter out) throws SQLException

    Sets the log writer for this `DataSource` object to the given `java.io.PrintWriter` object.

    The log writer is a character output stream to which all logging and tracing messages for this data source will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. Messages printed to a data source- specific log writer are not printed to the log writer associated with the `java.sql.DriverManager` class. When a `DataSource` object is created the log writer is initially null; in other words, the default is for logging to be disabled.

    Specified by:
      `setLogWriter` in interface `CommonDataSource`
    Parameters:
      `out` - the new log writer; to disable logging, set to null
    Throws:
      `SQLException` - if a database access error occurs
    Since:
      1.4
    See Also:
      - `CommonDataSource.getLogWriter()`

  - ### setLoginTimeout

    void setLoginTimeout(int seconds) throws SQLException

    Sets the maximum time in seconds that this data source will wait while attempting to connect to a database. A value of zero specifies that the timeout is the default system timeout if there is one; otherwise, it specifies that there is no timeout. When a `DataSource` object is created, the login timeout is initially zero.

    Specified by:
      `setLoginTimeout` in interface `CommonDataSource`
    Parameters:
      `seconds` - the data source login time limit
    Throws:
      `SQLException` - if a database access error occurs.
    Since:
      1.4
    See Also:
      - `CommonDataSource.getLoginTimeout()`

  - ### getLoginTimeout

    int getLoginTimeout() throws SQLException
    Gets the maximum time in seconds that this data source can wait while attempting to connect to a database. A value of zero means that the timeout is the default system timeout if there is one; otherwise, it means that there is no timeout. When a `DataSource` object is created, the login timeout is initially zero.
    Specified by:
      `getLoginTimeout` in interface `CommonDataSource`
    Returns:
      the data source login time limit
    Throws:
      `SQLException` - if a database access error occurs.
    Since:
      1.4
    See Also:
      - `CommonDataSource.setLoginTimeout(int)`

  - ### createXAConnectionBuilder

    default XAConnectionBuilder createXAConnectionBuilder() throws SQLException
    Creates a new `XAConnectionBuilder` instance
    Implementation Requirements:
      The default implementation will throw a `SQLFeatureNotSupportedException`.
    Returns:
      The XAConnectionBuilder instance that was created
    Throws:
      `SQLException` - if an error occurs creating the builder
      `SQLFeatureNotSupportedException` - if the driver does not support sharding
    Since:
      9
    See Also:
      - `XAConnectionBuilder`