Package org.monetdb.monetdbe

Class MonetDriver

java.lang.Object
org.monetdb.monetdbe.MonetDriver
All Implemented Interfaces:
Driver
public final class MonetDriver
extends Object
implements Driver
A JDBC Driver for the embedded version of the MonetDB RDBMS. This driver will be used by the DriverManager to determine if an URL is to be handled by this driver, and if it does, then this driver will supply a Connection suitable for MonetDB-embedded.

This Driver supports in-memory databases, local file databases and connection to another MonetDB instance through its MAPI URL. Valid MonetDBe-Java URLs:

  • In-memory database: jdbc:monetdb:memory:
  • Local file database: jdbc:monetdb:file:/path/to/directory/
  • Remote database: mapi:monetdb://<host>[:<port>]/<database>
where [:<port>] denotes that a port is optional. If not given, the default (50000) will be used.

Additional connection properties can be set in the URL query, with the following format:

jdbc:monetdb:memory:?property=propertyValue Or they can be set through the Properties object passed as an argument to DriverManager.getConnection(): 

 Properties props = new Properties();
 props.setProperty("autocommit","false");
 Connection c = DriverManager.getConnection("jdbc:monetdb:memory:", props);
Available properties:
  • user - Username for remote connections
  • password - Password for remote connections
  • autocommit - Autocommit mode
  • session_timeout - Session timeout, time in seconds to terminate session
  • query_timeout - Query timeout, time in seconds to terminate single query
  • memory_limit - Memory limit in MBs
  • nr_threads - Maximum number of worker treads

  • Constructor Details

  • Method Details

    • connect

      public Connection connect​(String url, Properties info) throws SQLException
      Attempts to make a database connection to the given URL. The driver should return "null" if it realizes it is the wrong kind of driver to connect to the given URL. This will be common, as when the JDBC driver manager is asked to connect to a given URL it passes the URL to each loaded driver in turn. The driver should throw an SQLException if it is the right driver to connect to the given URL but has trouble connecting to the database. The java.util.Properties argument can be used to pass arbitrary string tag/value pairs as connection arguments. Normally at least "user" and "password" properties should be included in the Properties object.
      Specified by:
      connect in interface Driver
      Parameters:
      url - the URL of the database to which to connect
      info - a list of arbitrary string tag/value pairs as connection arguments. Normally at least a "user" and "password" property should be included
      Returns:
      a Connection object that represents a connection to the URL
      Throws:
      SQLException - if a database access error occurs

    • acceptsURL

      public boolean acceptsURL​(String url)
      Retrieves whether the driver thinks that it can open a connection to the given URL. Typically drivers will return true if they understand the subprotocol specified in the URL and false if they do not.
      Specified by:
      acceptsURL in interface Driver
      Parameters:
      url - the URL of the database
      Returns:
      true if this driver understands the given URL; false otherwise

    • getPropertyInfo

      public DriverPropertyInfo[] getPropertyInfo​(String url, Properties info)
      Gets information about the possible properties for this driver. The getPropertyInfo method is intended to allow a generic GUI tool to discover what properties it should prompt a human for in order to get enough information to connect to a database. Note that depending on the values the human has supplied so far, additional values may become necessary, so it may be necessary to iterate though several calls to the getPropertyInfo method.
      Specified by:
      getPropertyInfo in interface Driver
      Parameters:
      url - the URL of the database to which to connect
      info - a proposed list of tag/value pairs that will be sent on connect open
      Returns:
      an array of DriverPropertyInfo objects describing possible properties. This array may be an empty array if no properties are required.

    • getMajorVersion

      public int getMajorVersion()
      Retrieves the driver's major version number. Initially this should be 1.
      Specified by:
      getMajorVersion in interface Driver
      Returns:
      this driver's major version number

    • getMinorVersion

      public int getMinorVersion()
      Gets the driver's minor version number. Initially this should be 0.
      Specified by:
      getMinorVersion in interface Driver
      Returns:
      this driver's minor version number

    • getDriverVersion

      public static final String getDriverVersion()
      Gets the driver's full version number as a String.
      Returns:
      this driver's full version number

    • getDatabaseVersion

      public static final String getDatabaseVersion()
      Gets the database's full version number as a String.
      Returns:
      this database's full version number

    • jdbcCompliant

      public boolean jdbcCompliant()
      Reports whether this driver is a genuine JDBC Compliant™ driver. A driver may only report true here if it passes the JDBC compliance tests; otherwise it is required to return false.
      Specified by:
      jdbcCompliant in interface Driver
      Returns:
      true if this driver is JDBC Compliant; false otherwise

    • getParentLogger

      public Logger getParentLogger() throws SQLFeatureNotSupportedException
      Return the parent Logger of all the Loggers used by this data source (not supported).
      Specified by:
      getParentLogger in interface Driver
      Returns:
      the parent Logger for this data source
      Throws:
      SQLFeatureNotSupportedException - if the data source does not use java.util.logging