Class DbState

java.lang.Object
fj.control.db.DbState
public final class DbState extends Object
Performs database I/O, in order to read or write the database state.

  • Field Details

    • pc

      private final Connector pc

    • terminal

      private final DB<Unit> terminal

    • rollback

      private static final DB<Unit> rollback

    • commit

      private static final DB<Unit> commit

  • Constructor Details

  • Method Details

    • driverManager

      public static Connector driverManager(String url)
      A simple connector (the default) that gets connections to the given database URL from the driver manager.
      Parameters:
      url - The database URL to connect to.
      Returns:
      A connector that generates connections to the given database.

    • reader

      public static DbState reader(String url)
      Creates a database state reader given a connection URL.
      Parameters:
      url - The connection URL to the database.
      Returns:
      A database state reader that reads the given database.

    • writer

      public static DbState writer(String url)
      Creates a database state writer given a connection URL.
      Parameters:
      url - The connection URL to the database.
      Returns:
      A database state writer that writes the given database.

    • reader

      public static DbState reader(Connector pc)
      Returns a new reader that reads the database via the given Connector.
      Parameters:
      pc - A connector with which to generate database connections.
      Returns:
      A new reader that reads the database via the given Connector.

    • writer

      public static DbState writer(Connector pc)
      Returns a new writer that writes the database via the given Connector.
      Parameters:
      pc - A connector with which to generate database connections.
      Returns:
      A new writer that writes the database via the given Connector.

    • run

      public <A> A run(DB<A> dba) throws SQLException
      Runs the given database action as a single transaction.
      Parameters:
      dba - A database action to run.
      Returns:
      The result of running the action against the database.
      Throws:
      SQLException - in case of a database error.