com.ibatis.common.jdbc
Class SimpleDataSource

java.lang.Object
  com.ibatis.common.jdbc.SimpleDataSource

All Implemented Interfaces:

DataSource

public class SimpleDataSource
extends Object
implements DataSource

This is a simple, synchronous, thread-safe database connection pool.

REQUIRED PROPERTIES ------------------- JDBC.Driver JDBC.ConnectionURL JDBC.Username JDBC.Password

Pool.MaximumActiveConnections Pool.MaximumIdleConnections Pool.MaximumCheckoutTime Pool.TimeToWait Pool.PingQuery Pool.PingEnabled Pool.PingConnectionsOlderThan Pool.PingConnectionsNotUsedFor Pool.QuietMode

Nested Class Summary

static class

SimpleDataSource.SimplePooledConnection --------------------------------------------------------------------------------------- SimplePooledConnection ---------------------------------------------------------------------------------------

Constructor Summary

SimpleDataSource(Map props)
Constructor to allow passing in a map of properties for configuration

Method Summary

protected void	finalize()
void	forceCloseAll() Closes all of the connections in the pool
long	getAverageCheckoutTime() Getter for the average age of a connection checkout
long	getAverageOverdueCheckoutTime() Getter for the average age of overdue connections
long	getAverageRequestTime() Getter for the average time required to get a connection to the database
long	getAverageWaitTime() Getter for the average time spent waiting for connections that were in use
long	getBadConnectionCount() Getter for the number of invalid connections that were found in the pool
long	getClaimedOverdueConnectionCount() Getter for the number of connections that were claimed before they were returned
Connection	getConnection()
Connection	getConnection(String username, String password)
long	getHadToWaitCount() Getter for the number of requests that had to wait for connections that were in use
String	getJdbcDriver() Getter for the name of the JDBC driver class used
String	getJdbcPassword() Getter for the JDBC password used
String	getJdbcUrl() Getter of the JDBC URL used
String	getJdbcUsername() Getter for the JDBC user name used
int	getLoginTimeout()
PrintWriter	getLogWriter()
int	getPoolMaximumActiveConnections() Getter for the maximum number of active connections
int	getPoolMaximumCheckoutTime() Getter for the maximum time a connection can be used before it *may* be given away again.
int	getPoolMaximumIdleConnections() Getter for the maximum number of idle connections
int	getPoolPingConnectionsNotUsedFor() If a connection has not been used in this many milliseconds, ping the database to make sure the connection is still good.
int	getPoolPingConnectionsOlderThan() Getter for the age of connections that should be pinged before using
String	getPoolPingQuery() Getter for the query to be used to check a connection
int	getPoolTimeToWait() Getter for the time to wait before retrying to get a connection
long	getRequestCount() Getter for the number of connection requests made
String	getStatus() Returns the status of the connection pool
boolean	isPoolPingEnabled() Getter to tell if we should use the ping query
void	setLoginTimeout(int loginTimeout)
void	setLogWriter(PrintWriter logWriter)
static Connection	unwrapConnection(Connection conn) Unwraps a pooled connection to get to the 'real' connection

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleDataSource

public SimpleDataSource(Map props)

Constructor to allow passing in a map of properties for configuration

Parameters:

props - - the configuration parameters

Method Detail

getConnection

public Connection getConnection()
                         throws SQLException

Specified by:

getConnection in interface DataSource

Throws:

SQLException

See Also:

DataSource.getConnection()

getConnection

public Connection getConnection(String username,
                                String password)
                         throws SQLException

Specified by:

getConnection in interface DataSource

Throws:

SQLException

See Also:

DataSource.getConnection(java.lang.String, java.lang.String)

setLoginTimeout

public void setLoginTimeout(int loginTimeout)
                     throws SQLException

Specified by:

setLoginTimeout in interface DataSource

Throws:

SQLException

See Also:

DataSource.setLoginTimeout(int)

getLoginTimeout

public int getLoginTimeout()
                    throws SQLException

Specified by:

getLoginTimeout in interface DataSource

Throws:

SQLException

See Also:

DataSource.getLoginTimeout()

setLogWriter

public void setLogWriter(PrintWriter logWriter)
                  throws SQLException

Specified by:

setLogWriter in interface DataSource

Throws:

SQLException

See Also:

DataSource.setLogWriter(java.io.PrintWriter)

getLogWriter

public PrintWriter getLogWriter()
                         throws SQLException

Specified by:

getLogWriter in interface DataSource

Throws:

SQLException

See Also:

DataSource.getLogWriter()

getPoolPingConnectionsNotUsedFor

public int getPoolPingConnectionsNotUsedFor()

If a connection has not been used in this many milliseconds, ping the database to make sure the connection is still good.

Returns:

the number of milliseconds of inactivity that will trigger a ping

getJdbcDriver

public String getJdbcDriver()

Getter for the name of the JDBC driver class used

Returns:

The name of the class

getJdbcUrl

public String getJdbcUrl()

Getter of the JDBC URL used

Returns:

The JDBC URL

getJdbcUsername

public String getJdbcUsername()

Getter for the JDBC user name used

Returns:

The user name

getJdbcPassword

public String getJdbcPassword()

Getter for the JDBC password used

Returns:

The password

getPoolMaximumActiveConnections

public int getPoolMaximumActiveConnections()

Getter for the maximum number of active connections

Returns:

The maximum number of active connections

getPoolMaximumIdleConnections

public int getPoolMaximumIdleConnections()

Getter for the maximum number of idle connections

Returns:

The maximum number of idle connections

getPoolMaximumCheckoutTime

public int getPoolMaximumCheckoutTime()

Getter for the maximum time a connection can be used before it *may* be given away again.

Returns:

The maximum time

getPoolTimeToWait

public int getPoolTimeToWait()

Getter for the time to wait before retrying to get a connection

Returns:

The time to wait

getPoolPingQuery

public String getPoolPingQuery()

Getter for the query to be used to check a connection

Returns:

The query

isPoolPingEnabled

public boolean isPoolPingEnabled()

Getter to tell if we should use the ping query

Returns:

True if we need to check a connection before using it

getPoolPingConnectionsOlderThan

public int getPoolPingConnectionsOlderThan()

Getter for the age of connections that should be pinged before using

Returns:

The age

getRequestCount

public long getRequestCount()

Getter for the number of connection requests made

Returns:

The number of connection requests made

getAverageRequestTime

public long getAverageRequestTime()

Getter for the average time required to get a connection to the database

Returns:

The average time

getAverageWaitTime

public long getAverageWaitTime()

Getter for the average time spent waiting for connections that were in use

Returns:

The average time

getHadToWaitCount

public long getHadToWaitCount()

Getter for the number of requests that had to wait for connections that were in use

Returns:

The number of requests that had to wait

getBadConnectionCount

public long getBadConnectionCount()

Getter for the number of invalid connections that were found in the pool

Returns:

The number of invalid connections

getClaimedOverdueConnectionCount

public long getClaimedOverdueConnectionCount()

Getter for the number of connections that were claimed before they were returned

Returns:

The number of connections

getAverageOverdueCheckoutTime

public long getAverageOverdueCheckoutTime()

Getter for the average age of overdue connections

Returns:

The average age

getAverageCheckoutTime

public long getAverageCheckoutTime()

Getter for the average age of a connection checkout

Returns:

The average age

getStatus

public String getStatus()

Returns the status of the connection pool

Returns:

The status

forceCloseAll

public void forceCloseAll()

Closes all of the connections in the pool

unwrapConnection

public static Connection unwrapConnection(Connection conn)

Unwraps a pooled connection to get to the 'real' connection

Parameters:

conn - - the pooled connection to unwrap

Returns:

The 'real' connection

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable