org.jcreme.sql
Class CremeDriver

java.lang.Object
  org.jcreme.sql.CremeDriver

All Implemented Interfaces:

java.sql.Driver

public class CremeDriver

extends java.lang.Object

implements java.sql.Driver

This driver enables to use ConnectionPools to avoid useless creation and close of Connections. It also wrapped the connections in a WrappedConnection that provide fine error reporting and logging.

Version:

$Revision: 1.2 $

Author:

$Author: dbregeon $

Field Summary

protected static int	MAJOR_VERSION
protected static int	MINOR_VERSION

Constructor Summary

CremeDriver(int minPoolSize, int maxPoolSize, IsolationLevel isolationLevel)
Creates a new instance of PoolingDriver

Method Summary

boolean	acceptsURL(java.lang.String url) Retrieves whether the driver thinks that it can open a connection to the given URL.
java.sql.Connection	connect(java.lang.String url, java.util.Properties info) Attempts to make a database connection to the given URL.
int	getMajorVersion() Retrieves the driver's major version number.
int	getMinorVersion() Gets the driver's minor version number.
java.sql.DriverPropertyInfo[]	getPropertyInfo(java.lang.String url, java.util.Properties info) Gets information about the possible properties for this driver.
boolean	jdbcCompliant() Reports whether this driver is a genuine JDBC Compliant TM driver.
void	setAutoCommit(boolean autoCommit)
void	setMaximumSize(int maximumSize)
void	setMinimumSize(int minimumSize)
void	setTransactionIsolation(IsolationLevel isolationLevel)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAJOR_VERSION

protected static final int MAJOR_VERSION

See Also:

Constant Field Values

MINOR_VERSION

protected static final int MINOR_VERSION

See Also:

Constant Field Values

Constructor Detail

CremeDriver

public CremeDriver(int minPoolSize,
                   int maxPoolSize,
                   IsolationLevel isolationLevel)

Creates a new instance of PoolingDriver

Parameters:

minPoolSize - the minimum size for the pools in this Driver.

maxPoolSize - the maximum size for the pools in this Driver.

isolationLevel - the isolation level for the pools in this driver.

Method Detail

acceptsURL

public boolean acceptsURL(java.lang.String url)
                   throws java.sql.SQLException

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 java.sql.Driver

Parameters:

url - the URL of the database

Returns:

true if this driver understands the given URL; false otherwise

Throws:

java.sql.SQLException - if a database access error occurs

connect

public java.sql.Connection connect(java.lang.String url,
                                   java.util.Properties info)
                            throws java.sql.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 java.sql.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:

java.sql.SQLException - if a database access error occurs

getMajorVersion

public int getMajorVersion()

Retrieves the driver's major version number. Initially this should be 1.

Specified by:

getMajorVersion in interface java.sql.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 java.sql.Driver

Returns:

this driver's minor version number

getPropertyInfo

public java.sql.DriverPropertyInfo[] getPropertyInfo(java.lang.String url,
                                                     java.util.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 java.sql.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.

Throws:

java.sql.SQLException - if a database access error occurs

jdbcCompliant

public boolean jdbcCompliant()

Reports whether this driver is a genuine JDBC Compliant ^TM driver. A driver may only report true here if it passes the JDBC compliance tests; otherwise it is required to return false.

JDBC compliance requires full support for the JDBC API and full support for SQL 92 Entry Level. It is expected that JDBC compliant drivers will be available for all the major commercial databases.

This method is not intended to encourage the development of non-JDBC compliant drivers, but is a recognition of the fact that some vendors are interested in using the JDBC API and framework for lightweight databases that do not support full database functionality, or for special databases such as document information retrieval where a SQL implementation may not be feasible.

Specified by:

jdbcCompliant in interface java.sql.Driver

Returns:

true if this driver is JDBC Compliant; false otherwise

setTransactionIsolation

public void setTransactionIsolation(IsolationLevel isolationLevel)
                             throws java.sql.SQLException

Parameters:

isolationLevel -

Throws:

java.sql.SQLException

setMinimumSize

public void setMinimumSize(int minimumSize)
                    throws java.sql.SQLException

Parameters:

minimumSize -

Throws:

java.sql.SQLException

setMaximumSize

public void setMaximumSize(int maximumSize)
                    throws java.sql.SQLException

Parameters:

maximumSize -

Throws:

java.sql.SQLException

setAutoCommit

public void setAutoCommit(boolean autoCommit)
                   throws java.sql.SQLException

Parameters:

autoCommit -

Throws:

java.sql.SQLException