org.apache.commons.dbcp2

## Class BasicDataSource

- java.lang.Object
- - org.apache.commons.dbcp2.BasicDataSource

- All Implemented Interfaces:
    Wrapper, MBeanRegistration, CommonDataSource, DataSource, BasicDataSourceMXBean
  Direct Known Subclasses:
    BasicManagedDataSource

      public class BasicDataSource
      extends Object
      implements DataSource, BasicDataSourceMXBean, MBeanRegistration

  Basic implementation of `javax.sql.DataSource` that is configured via JavaBeans properties. This is not the only way to combine the commons-dbcp and commons-pool packages, but provides a "one stop shopping" solution for basic requirements.

  Since:
    2.0
  Version:
    $Revision: 1572244 $ $Date: 2014-02-26 20:38:08 +0000 (Wed, 26 Feb 2014) $
  Author:
    Glenn L. Nielsen, Craig R. McClanahan, Dirk Verbeeck

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `BasicDataSource()`

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `addConnectionProperty(String name, String value)` Add a custom connection property to the set that will be passed to our JDBC driver.
    `void` | `close()` Closes and releases all idle connections that are currently stored in the connection pool associated with this data source.
    `protected ConnectionFactory` | `createConnectionFactory()` Creates a JDBC connection factory for this datasource.
    `protected void` | `createConnectionPool(PoolableConnectionFactory factory)` Creates a connection pool for this datasource.
    `protected DataSource` | `createDataSource()` Create (if necessary) and return the internal data source we are using to manage our connections.
    `protected DataSource` | `createDataSourceInstance()` Creates the actual data source instance.
    `protected PoolableConnectionFactory` | `createPoolableConnectionFactory(ConnectionFactory driverConnectionFactory)` Creates the PoolableConnectionFactory and attaches it to the connection pool.
    `PrintWriter` | `getAbandonedLogWriter()` Gets the log writer to be used by this configuration to log information on abandoned objects.
    `boolean` | `getAbandonedUsageTracking()` If the connection pool implements `UsageTracking`, should the connection pool record a stack trace every time a method is called on a pooled connection and retain the most recent stack trace to aid debugging of abandoned connections?
    `boolean` | `getCacheState()` Returns the state caching flag.
    `Connection` | `getConnection()` Create (if necessary) and return a connection to the database.
    `Connection` | `getConnection(String user, String pass)` BasicDataSource does NOT support this method.
    `List<String>` | `getConnectionInitSqls()` Returns the list of SQL statements executed when a physical connection is first created.
    `String[]` | `getConnectionInitSqlsAsArray()` Provides the same data as `getConnectionInitSqls()` but in an array so it is accessible via JMX.
    `protected org.apache.commons.pool2.impl.GenericObjectPool<PoolableConnection>` | `getConnectionPool()`
    `Boolean` | `getDefaultAutoCommit()` Returns the default auto-commit property.
    `String` | `getDefaultCatalog()` Returns the default catalog.
    `Integer` | `getDefaultQueryTimeout()` Obtain the default query timeout that will be used for `Statement`s created from this connection.
    `Boolean` | `getDefaultReadOnly()` Returns the default readOnly property.
    `int` | `getDefaultTransactionIsolation()` Returns the default transaction isolation state of returned connections.
    `Driver` | `getDriver()` Returns the JDBC Driver that has been configured for use by this pool.
    `ClassLoader` | `getDriverClassLoader()` Returns the class loader specified for loading the JDBC driver.
    `String` | `getDriverClassName()` Returns the jdbc driver class name.
    `boolean` | `getEnableAutoCommitOnReturn()` Returns the value of the flag that controls whether or not connections being returned to the pool will checked and configured with `Connection.setAutoCommit(true)` if the auto commit setting is `false when the connection is returned.`
    `String` | `getEvictionPolicyClassName()` Gets the EvictionPolicy implementation in use with this connection pool.
    `int` | `getInitialSize()` Returns the initial size of the connection pool.
    `String` | `getJmxName()` Returns the JMX name that has been requested for this DataSource.
    `boolean` | `getLifo()` Returns the LIFO property.
    `boolean` | `getLogAbandoned()` Flag to log stack traces for application code which abandoned a Statement or Connection.
    `int` | `getLoginTimeout()` BasicDataSource does NOT support this method.
    `PrintWriter` | `getLogWriter()` Returns the log writer being used by this data source.
    `long` | `getMaxConnLifetimeMillis()` Returns the maximum permitted lifetime of a connection in milliseconds.
    `int` | `getMaxIdle()` Returns the maximum number of connections that can remain idle in the pool.
    `int` | `getMaxOpenPreparedStatements()` Gets the value of the `maxOpenPreparedStatements` property.
    `int` | `getMaxTotal()` Returns the maximum number of active connections that can be allocated at the same time.
    `long` | `getMaxWaitMillis()` Returns the maximum number of milliseconds that the pool will wait for a connection to be returned before throwing an exception.
    `long` | `getMinEvictableIdleTimeMillis()` Returns the `minEvictableIdleTimeMillis` property.
    `int` | `getMinIdle()` Returns the minimum number of idle connections in the pool.
    `int` | `getNumActive()` [Read Only] The current number of active connections that have been allocated from this data source.
    `int` | `getNumIdle()` [Read Only] The current number of idle connections that are waiting to be allocated from this data source.
    `int` | `getNumTestsPerEvictionRun()` Returns the value of the `numTestsPerEvictionRun` property.
    `Logger` | `getParentLogger()`
    `String` | `getPassword()` Returns the password passed to the JDBC driver to establish connections.
    `protected ObjectName` | `getRegisteredJmxName()`
    `boolean` | `getRemoveAbandonedOnBorrow()` Flag to remove abandoned connections if they exceed the removeAbandonedTimeout when borrowObject is invoked.
    `boolean` | `getRemoveAbandonedOnMaintenance()` Flag to remove abandoned connections if they exceed the removeAbandonedTimeout during pool maintenance.
    `int` | `getRemoveAbandonedTimeout()` Timeout in seconds before an abandoned connection can be removed.
    `boolean` | `getRollbackOnReturn()` Gets the current value of the flag that controls if a connection will be rolled back when it is returned to the pool if auto commit is not enabled and the connection is not read only.
    `long` | `getSoftMinEvictableIdleTimeMillis()` Returns the minimum amount of time a connection may sit idle in the pool before it is eligible for eviction by the idle object evictor, with the extra condition that at least "minIdle" connections remain in the pool.
    `boolean` | `getTestOnBorrow()` Returns the `testOnBorrow` property.
    `boolean` | `getTestOnCreate()` Returns the `testOnCreate` property.
    `boolean` | `getTestOnReturn()` Returns the value of the `testOnReturn` property.
    `boolean` | `getTestWhileIdle()` Returns the value of the `testWhileIdle` property.
    `long` | `getTimeBetweenEvictionRunsMillis()` Returns the value of the `timeBetweenEvictionRunsMillis` property.
    `String` | `getUrl()` Returns the JDBC connection `url` property.
    `String` | `getUsername()` Returns the JDBC connection `username` property.
    `String` | `getValidationQuery()` Returns the validation query used to validate connections before returning them.
    `int` | `getValidationQueryTimeout()` Returns the validation query timeout.
    `boolean` | `isAccessToUnderlyingConnectionAllowed()` Returns the value of the accessToUnderlyingConnectionAllowed property.
    `boolean` | `isClosed()` If true, this data source is closed and no more connections can be retrieved from this datasource.
    `boolean` | `isPoolPreparedStatements()` Returns true if we are pooling statements.
    `boolean` | `isWrapperFor(Class<?> iface)`
    `protected void` | `log(String message)`
    `void` | `postDeregister()`
    `void` | `postRegister(Boolean registrationDone)`
    `void` | `preDeregister()`
    `ObjectName` | `preRegister(MBeanServer server, ObjectName name)`
    `void` | `removeConnectionProperty(String name)` Remove a custom connection property.
    `void` | `setAbandonedLogWriter(PrintWriter logWriter)` Sets the log writer to be used by this configuration to log information on abandoned objects.
    `void` | `setAbandonedUsageTracking(boolean usageTracking)` If the connection pool implements `UsageTracking`, configure whether the connection pool should record a stack trace every time a method is called on a pooled connection and retain the most recent stack trace to aid debugging of abandoned connections.
    `void` | `setAccessToUnderlyingConnectionAllowed(boolean allow)` Sets the value of the accessToUnderlyingConnectionAllowed property.
    `void` | `setCacheState(boolean cacheState)` Sets the state caching flag.
    `void` | `setConnectionInitSqls(Collection<String> connectionInitSqls)` Sets the list of SQL statements to be executed when a physical connection is first created.
    `void` | `setConnectionProperties(String connectionProperties)` Sets the connection properties passed to driver.connect(...).
    `void` | `setDefaultAutoCommit(Boolean defaultAutoCommit)` Sets default auto-commit state of connections returned by this datasource.
    `void` | `setDefaultCatalog(String defaultCatalog)` Sets the default catalog.
    `void` | `setDefaultQueryTimeout(Integer defaultQueryTimeout)` Set the default query timeout that will be used for `Statement`s created from this connection.
    `void` | `setDefaultReadOnly(Boolean defaultReadOnly)` Sets defaultReadonly property.
    `void` | `setDefaultTransactionIsolation(int defaultTransactionIsolation)` Sets the default transaction isolation state for returned connections.
    `void` | `setDriver(Driver driver)` Sets the JDBC Driver instance to use for this pool.
    `void` | `setDriverClassLoader(ClassLoader driverClassLoader)` Sets the class loader to be used to load the JDBC driver.
    `void` | `setDriverClassName(String driverClassName)` Sets the jdbc driver class name.
    `void` | `setEnableAutoCommitOnReturn(boolean enableAutoCommitOnReturn)` Sets the value of the flag that controls whether or not connections being returned to the pool will checked and configured with `Connection.setAutoCommit(true)` if the auto commit setting is `false when the connection is returned.`
    `void` | `setEvictionPolicyClassName(String evictionPolicyClassName)` Sets the EvictionPolicy implementation to use with this connection pool.
    `void` | `setInitialSize(int initialSize)` Sets the initial size of the connection pool.
    `void` | `setJmxName(String jmxName)` Sets the JMX name that has been requested for this DataSource.
    `void` | `setLifo(boolean lifo)` Sets the LIFO property.
    `void` | `setLogAbandoned(boolean logAbandoned)`
    `void` | `setLoginTimeout(int loginTimeout)` BasicDataSource does NOT support this method.
    `void` | `setLogWriter(PrintWriter logWriter)` Sets the log writer being used by this data source.
    `void` | `setMaxConnLifetimeMillis(long maxConnLifetimeMillis)` Sets the maximum permitted lifetime of a connection in milliseconds.
    `void` | `setMaxIdle(int maxIdle)` Sets the maximum number of connections that can remain idle in the pool.
    `void` | `setMaxOpenPreparedStatements(int maxOpenStatements)` Sets the value of the `maxOpenPreparedStatements` property.
    `void` | `setMaxTotal(int maxTotal)` Sets the maximum total number of idle and borrows connections that can be active at the same time.
    `void` | `setMaxWaitMillis(long maxWaitMillis)` Sets the MaxWaitMillis property.
    `void` | `setMinEvictableIdleTimeMillis(long minEvictableIdleTimeMillis)` Sets the `minEvictableIdleTimeMillis` property.
    `void` | `setMinIdle(int minIdle)` Sets the minimum number of idle connections in the pool.
    `void` | `setNumTestsPerEvictionRun(int numTestsPerEvictionRun)` Sets the value of the `numTestsPerEvictionRun` property.
    `void` | `setPassword(String password)` Sets the `password`.
    `void` | `setPoolPreparedStatements(boolean poolingStatements)` Sets whether to pool statements or not.
    `void` | `setRemoveAbandonedOnBorrow(boolean removeAbandonedOnBorrow)` Flag to remove abandoned connections if they exceed the removeAbandonedTimeout during pool maintenance.
    `void` | `setRemoveAbandonedOnMaintenance(boolean removeAbandonedOnMaintenance)` Flag to remove abandoned connections if they exceed the removeAbandonedTimeout when borrowObject is invoked.
    `void` | `setRemoveAbandonedTimeout(int removeAbandonedTimeout)` Sets the timeout in seconds before an abandoned connection can be removed.
    `void` | `setRollbackOnReturn(boolean rollbackOnReturn)` Sets the flag that controls if a connection will be rolled back when it is returned to the pool if auto commit is not enabled and the connection is not read only.
    `void` | `setSoftMinEvictableIdleTimeMillis(long softMinEvictableIdleTimeMillis)` Sets the minimum amount of time a connection may sit idle in the pool before it is eligible for eviction by the idle object evictor, with the extra condition that at least "minIdle" connections remain in the pool.
    `void` | `setTestOnBorrow(boolean testOnBorrow)` Sets the `testOnBorrow` property.
    `void` | `setTestOnCreate(boolean testOnCreate)` Sets the `testOnCreate` property.
    `void` | `setTestOnReturn(boolean testOnReturn)` Sets the `testOnReturn` property.
    `void` | `setTestWhileIdle(boolean testWhileIdle)` Sets the `testWhileIdle` property.
    `void` | `setTimeBetweenEvictionRunsMillis(long timeBetweenEvictionRunsMillis)` Sets the `timeBetweenEvictionRunsMillis` property.
    `void` | `setUrl(String url)` Sets the `url`.
    `void` | `setUsername(String username)` Sets the `username`.
    `void` | `setValidationQuery(String validationQuery)` Sets the `validationQuery`.
    `void` | `setValidationQueryTimeout(int timeout)` Sets the validation query timeout, the amount of time, in seconds, that connection validation will wait for a response from the database when executing a validation query.
    `protected void` | `startPoolMaintenance()` Starts the connection pool maintenance task, if configured.
    `<T> T` | `unwrap(Class<T> iface)`
    `protected static void` | `validateConnectionFactory(PoolableConnectionFactory connectionFactory)`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### BasicDataSource

          public BasicDataSource()

  - ### Method Detail

    - #### getDefaultAutoCommit

          public Boolean getDefaultAutoCommit()

      Returns the default auto-commit property.
      Specified by:
        `getDefaultAutoCommit` in interface `BasicDataSourceMXBean`
      Returns:
        true if default auto-commit is enabled

    - #### setDefaultAutoCommit

          public void setDefaultAutoCommit(Boolean defaultAutoCommit)

      Sets default auto-commit state of connections returned by this datasource.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `defaultAutoCommit` - default auto-commit value

    - #### getDefaultReadOnly

          public Boolean getDefaultReadOnly()

      Returns the default readOnly property.
      Specified by:
        `getDefaultReadOnly` in interface `BasicDataSourceMXBean`
      Returns:
        true if connections are readOnly by default

    - #### setDefaultReadOnly

          public void setDefaultReadOnly(Boolean defaultReadOnly)

      Sets defaultReadonly property.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `defaultReadOnly` - default read-only value

    - #### getDefaultTransactionIsolation

          public int getDefaultTransactionIsolation()

      Returns the default transaction isolation state of returned connections.
      Specified by:
        `getDefaultTransactionIsolation` in interface `BasicDataSourceMXBean`
      Returns:
        the default value for transaction isolation state
      See Also:
        `Connection.getTransactionIsolation()`

    - #### setDefaultTransactionIsolation

          public void setDefaultTransactionIsolation(int defaultTransactionIsolation)

      Sets the default transaction isolation state for returned connections.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `defaultTransactionIsolation` - the default transaction isolation state
      See Also:
        `Connection.getTransactionIsolation()`

    - #### getDefaultQueryTimeout

          public Integer getDefaultQueryTimeout()

      Obtain the default query timeout that will be used for `Statement`s created from this connection. `null` means that the driver default will be used.

    - #### setDefaultQueryTimeout

          public void setDefaultQueryTimeout(Integer defaultQueryTimeout)

      Set the default query timeout that will be used for `Statement`s created from this connection. `null` means that the driver default will be used.

    - #### getDefaultCatalog

          public String getDefaultCatalog()

      Returns the default catalog.
      Specified by:
        `getDefaultCatalog` in interface `BasicDataSourceMXBean`
      Returns:
        the default catalog

    - #### setDefaultCatalog

          public void setDefaultCatalog(String defaultCatalog)

      Sets the default catalog.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `defaultCatalog` - the default catalog

    - #### getCacheState

          public boolean getCacheState()

      Returns the state caching flag.
      Specified by:
        `getCacheState` in interface `BasicDataSourceMXBean`
      Returns:
        the state caching flag

    - #### setCacheState

          public void setCacheState(boolean cacheState)

      Sets the state caching flag.
      Parameters:
        `cacheState` - The new value for the state caching flag

    - #### getDriver

          public Driver getDriver()

      Returns the JDBC Driver that has been configured for use by this pool.

      Note: This getter only returns the last value set by a call to `setDriver(Driver)`. It does not return any driver instance that may have been created from the value set via `setDriverClassName(String)`.

      Returns:
        the JDBC Driver that has been configured for use by this pool

    - #### setDriver

          public void setDriver(Driver driver)

      Sets the JDBC Driver instance to use for this pool.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `driver` -

    - #### getDriverClassName

          public String getDriverClassName()

      Returns the jdbc driver class name.

      Note: This getter only returns the last value set by a call to `setDriverClassName(String)`. It does not return the class name of any driver that may have been set via `setDriver(Driver)`.

      Specified by:
        `getDriverClassName` in interface `BasicDataSourceMXBean`
      Returns:
        the jdbc driver class name

    - #### setDriverClassName

          public void setDriverClassName(String driverClassName)

      Sets the jdbc driver class name.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `driverClassName` - the class name of the jdbc driver

    - #### getDriverClassLoader

          public ClassLoader getDriverClassLoader()

      Returns the class loader specified for loading the JDBC driver. Returns `null` if no class loader has been explicitly specified.

      Note: This getter only returns the last value set by a call to `setDriverClassLoader(ClassLoader)`. It does not return the class loader of any driver that may have been set via `setDriver(Driver)`.

    - #### setDriverClassLoader

          public void setDriverClassLoader(ClassLoader driverClassLoader)

      Sets the class loader to be used to load the JDBC driver.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `driverClassLoader` - the class loader with which to load the JDBC driver

    - #### getLifo

          public boolean getLifo()

      Returns the LIFO property.
      Specified by:
        `getLifo` in interface `BasicDataSourceMXBean`
      Returns:
        true if connection pool behaves as a LIFO queue.

    - #### setLifo

          public void setLifo(boolean lifo)

      Sets the LIFO property. True means the pool behaves as a LIFO queue; false means FIFO.
      Parameters:
        `lifo` - the new value for the LIFO property

    - #### getMaxTotal

          public int getMaxTotal()

      Returns the maximum number of active connections that can be allocated at the same time.

      A negative number means that there is no limit.

      Specified by:
        `getMaxTotal` in interface `BasicDataSourceMXBean`
      Returns:
        the maximum number of active connections

    - #### setMaxTotal

          public void setMaxTotal(int maxTotal)

      Sets the maximum total number of idle and borrows connections that can be active at the same time. Use a negative value for no limit.
      Parameters:
        `maxTotal` - the new value for maxTotal
      See Also:
        `getMaxTotal()`

    - #### getMaxIdle

          public int getMaxIdle()

      Returns the maximum number of connections that can remain idle in the pool. Excess idle connections are destroyed on return to the pool.

      A negative value indicates that there is no limit

      Specified by:
        `getMaxIdle` in interface `BasicDataSourceMXBean`
      Returns:
        the maximum number of idle connections

    - #### setMaxIdle

          public void setMaxIdle(int maxIdle)

      Sets the maximum number of connections that can remain idle in the pool. Excess idle connections are destroyed on return to the pool.
      Parameters:
        `maxIdle` - the new value for maxIdle
      See Also:
        `getMaxIdle()`

    - #### getMinIdle

          public int getMinIdle()

      Returns the minimum number of idle connections in the pool. The pool attempts to ensure that minIdle connections are available when the idle object evictor runs. The value of this property has no effect unless `timeBetweenEvictionRunsMillis` has a positive value.
      Specified by:
        `getMinIdle` in interface `BasicDataSourceMXBean`
      Returns:
        the minimum number of idle connections
      See Also:
        `GenericObjectPool.getMinIdle()`

    - #### setMinIdle

          public void setMinIdle(int minIdle)

      Sets the minimum number of idle connections in the pool. The pool attempts to ensure that minIdle connections are available when the idle object evictor runs. The value of this property has no effect unless `timeBetweenEvictionRunsMillis` has a positive value.
      Parameters:
        `minIdle` - the new value for minIdle
      See Also:
        `GenericObjectPool.setMinIdle(int)`

    - #### getInitialSize

          public int getInitialSize()

      Returns the initial size of the connection pool.
      Specified by:
        `getInitialSize` in interface `BasicDataSourceMXBean`
      Returns:
        the number of connections created when the pool is initialized

    - #### setInitialSize

          public void setInitialSize(int initialSize)

      Sets the initial size of the connection pool.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `initialSize` - the number of connections created when the pool is initialized

    - #### getMaxWaitMillis

          public long getMaxWaitMillis()

      Returns the maximum number of milliseconds that the pool will wait for a connection to be returned before throwing an exception. A value less than or equal to zero means the pool is set to wait indefinitely.
      Specified by:
        `getMaxWaitMillis` in interface `BasicDataSourceMXBean`
      Returns:
        the maxWaitMillis property value

    - #### setMaxWaitMillis

          public void setMaxWaitMillis(long maxWaitMillis)

      Sets the MaxWaitMillis property. Use -1 to make the pool wait indefinitely.
      Parameters:
        `maxWaitMillis` - the new value for MaxWaitMillis
      See Also:
        `getMaxWaitMillis()`

    - #### isPoolPreparedStatements

          public boolean isPoolPreparedStatements()

      Returns true if we are pooling statements.
      Specified by:
        `isPoolPreparedStatements` in interface `BasicDataSourceMXBean`
      Returns:
        true if prepared and callable statements are pooled

    - #### setPoolPreparedStatements

          public void setPoolPreparedStatements(boolean poolingStatements)

      Sets whether to pool statements or not.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `poolingStatements` - pooling on or off

    - #### getMaxOpenPreparedStatements

          public int getMaxOpenPreparedStatements()

      Gets the value of the `maxOpenPreparedStatements` property.
      Specified by:
        `getMaxOpenPreparedStatements` in interface `BasicDataSourceMXBean`
      Returns:
        the maximum number of open statements

    - #### setMaxOpenPreparedStatements

          public void setMaxOpenPreparedStatements(int maxOpenStatements)

      Sets the value of the `maxOpenPreparedStatements` property.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `maxOpenStatements` - the new maximum number of prepared statements

    - #### getTestOnCreate

          public boolean getTestOnCreate()

      Returns the `testOnCreate` property.
      Specified by:
        `getTestOnCreate` in interface `BasicDataSourceMXBean`
      Returns:
        true if objects are validated immediately after they are created by the pool
      See Also:
        `testOnCreate`

    - #### setTestOnCreate

          public void setTestOnCreate(boolean testOnCreate)

      Sets the `testOnCreate` property. This property determines whether or not the pool will validate objects immediately after they are created by the pool
      Parameters:
        `testOnCreate` - new value for testOnCreate property

    - #### getTestOnBorrow

          public boolean getTestOnBorrow()

      Returns the `testOnBorrow` property.
      Specified by:
        `getTestOnBorrow` in interface `BasicDataSourceMXBean`
      Returns:
        true if objects are validated before being borrowed from the pool
      See Also:
        `testOnBorrow`

    - #### setTestOnBorrow

          public void setTestOnBorrow(boolean testOnBorrow)

      Sets the `testOnBorrow` property. This property determines whether or not the pool will validate objects before they are borrowed from the pool.
      Parameters:
        `testOnBorrow` - new value for testOnBorrow property

    - #### getTestOnReturn

          public boolean getTestOnReturn()

      Returns the value of the `testOnReturn` property.
      Returns:
        true if objects are validated before being returned to the pool
      See Also:
        `testOnReturn`

    - #### setTestOnReturn

          public void setTestOnReturn(boolean testOnReturn)

      Sets the `testOnReturn` property. This property determines whether or not the pool will validate objects before they are returned to the pool.
      Parameters:
        `testOnReturn` - new value for testOnReturn property

    - #### getTimeBetweenEvictionRunsMillis

          public long getTimeBetweenEvictionRunsMillis()

      Returns the value of the `timeBetweenEvictionRunsMillis` property.
      Specified by:
        `getTimeBetweenEvictionRunsMillis` in interface `BasicDataSourceMXBean`
      Returns:
        the time (in milliseconds) between evictor runs
      See Also:
        `timeBetweenEvictionRunsMillis`

    - #### setTimeBetweenEvictionRunsMillis

          public void setTimeBetweenEvictionRunsMillis(long timeBetweenEvictionRunsMillis)

      Sets the `timeBetweenEvictionRunsMillis` property.
      Parameters:
        `timeBetweenEvictionRunsMillis` - the new time between evictor runs
      See Also:
        `timeBetweenEvictionRunsMillis`

    - #### getNumTestsPerEvictionRun

          public int getNumTestsPerEvictionRun()

      Returns the value of the `numTestsPerEvictionRun` property.
      Specified by:
        `getNumTestsPerEvictionRun` in interface `BasicDataSourceMXBean`
      Returns:
        the number of objects to examine during idle object evictor runs
      See Also:
        `numTestsPerEvictionRun`

    - #### setNumTestsPerEvictionRun

          public void setNumTestsPerEvictionRun(int numTestsPerEvictionRun)

      Sets the value of the `numTestsPerEvictionRun` property.
      Parameters:
        `numTestsPerEvictionRun` - the new `numTestsPerEvictionRun` value
      See Also:
        `numTestsPerEvictionRun`

    - #### getMinEvictableIdleTimeMillis

          public long getMinEvictableIdleTimeMillis()

      Returns the `minEvictableIdleTimeMillis` property.
      Specified by:
        `getMinEvictableIdleTimeMillis` in interface `BasicDataSourceMXBean`
      Returns:
        the value of the `minEvictableIdleTimeMillis` property
      See Also:
        `minEvictableIdleTimeMillis`

    - #### setMinEvictableIdleTimeMillis

          public void setMinEvictableIdleTimeMillis(long minEvictableIdleTimeMillis)

      Sets the `minEvictableIdleTimeMillis` property.
      Parameters:
        `minEvictableIdleTimeMillis` - the minimum amount of time an object may sit idle in the pool
      See Also:
        `minEvictableIdleTimeMillis`

    - #### setSoftMinEvictableIdleTimeMillis

          public void setSoftMinEvictableIdleTimeMillis(long softMinEvictableIdleTimeMillis)

      Sets the minimum amount of time a connection may sit idle in the pool before it is eligible for eviction by the idle object evictor, with the extra condition that at least "minIdle" connections remain in the pool.
      Parameters:
        `softMinEvictableIdleTimeMillis` - minimum amount of time a connection may sit idle in the pool before it is eligible for eviction, assuming there are minIdle idle connections in the pool.
      See Also:
        `getSoftMinEvictableIdleTimeMillis()`

    - #### getSoftMinEvictableIdleTimeMillis

          public long getSoftMinEvictableIdleTimeMillis()

      Returns the minimum amount of time a connection may sit idle in the pool before it is eligible for eviction by the idle object evictor, with the extra condition that at least "minIdle" connections remain in the pool.

      When `miniEvictableIdleTimeMillis` is set to a positive value, miniEvictableIdleTimeMillis is examined first by the idle connection evictor - i.e. when idle connections are visited by the evictor, idle time is first compared against `minEvictableIdleTimeMillis` (without considering the number of idle connections in the pool) and then against `softMinEvictableIdleTimeMillis`, including the `minIdle`, constraint.

      Specified by:
        `getSoftMinEvictableIdleTimeMillis` in interface `BasicDataSourceMXBean`
      Returns:
        minimum amount of time a connection may sit idle in the pool before it is eligible for eviction, assuming there are minIdle idle connections in the pool

    - #### getEvictionPolicyClassName

          public String getEvictionPolicyClassName()

      Gets the EvictionPolicy implementation in use with this connection pool.

    - #### setEvictionPolicyClassName

          public void setEvictionPolicyClassName(String evictionPolicyClassName)

      Sets the EvictionPolicy implementation to use with this connection pool.
      Parameters:
        `evictionPolicyClassName` - The fully qualified class name of the EvictionPolicy implementation

    - #### getTestWhileIdle

          public boolean getTestWhileIdle()

      Returns the value of the `testWhileIdle` property.
      Specified by:
        `getTestWhileIdle` in interface `BasicDataSourceMXBean`
      Returns:
        true if objects examined by the idle object evictor are validated
      See Also:
        `testWhileIdle`

    - #### setTestWhileIdle

          public void setTestWhileIdle(boolean testWhileIdle)

      Sets the `testWhileIdle` property. This property determines whether or not the idle object evictor will validate connections.
      Parameters:
        `testWhileIdle` - new value for testWhileIdle property

    - #### getNumActive

          public int getNumActive()

      [Read Only] The current number of active connections that have been allocated from this data source.
      Specified by:
        `getNumActive` in interface `BasicDataSourceMXBean`
      Returns:
        the current number of active connections

    - #### getNumIdle

          public int getNumIdle()

      [Read Only] The current number of idle connections that are waiting to be allocated from this data source.
      Specified by:
        `getNumIdle` in interface `BasicDataSourceMXBean`
      Returns:
        the current number of idle connections

    - #### getPassword

          public String getPassword()

      Returns the password passed to the JDBC driver to establish connections.
      Specified by:
        `getPassword` in interface `BasicDataSourceMXBean`
      Returns:
        the connection password

    - #### setPassword

          public void setPassword(String password)

      Sets the `password`.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `password` - new value for the password

    - #### getUrl

          public String getUrl()

      Returns the JDBC connection `url` property.
      Specified by:
        `getUrl` in interface `BasicDataSourceMXBean`
      Returns:
        the `url` passed to the JDBC driver to establish connections

    - #### setUrl

          public void setUrl(String url)

      Sets the `url`.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `url` - the new value for the JDBC connection url

    - #### getUsername

          public String getUsername()

      Returns the JDBC connection `username` property.
      Specified by:
        `getUsername` in interface `BasicDataSourceMXBean`
      Returns:
        the `username` passed to the JDBC driver to establish connections

    - #### setUsername

          public void setUsername(String username)

      Sets the `username`.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `username` - the new value for the JDBC connection username

    - #### getValidationQuery

          public String getValidationQuery()

      Returns the validation query used to validate connections before returning them.
      Specified by:
        `getValidationQuery` in interface `BasicDataSourceMXBean`
      Returns:
        the SQL validation query
      See Also:
        `validationQuery`

    - #### setValidationQuery

          public void setValidationQuery(String validationQuery)

      Sets the `validationQuery`.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `validationQuery` - the new value for the validation query

    - #### getValidationQueryTimeout

          public int getValidationQueryTimeout()

      Returns the validation query timeout.
      Specified by:
        `getValidationQueryTimeout` in interface `BasicDataSourceMXBean`
      Returns:
        the timeout in seconds before connection validation queries fail.

    - #### setValidationQueryTimeout

          public void setValidationQueryTimeout(int timeout)

      Sets the validation query timeout, the amount of time, in seconds, that connection validation will wait for a response from the database when executing a validation query. Use a value less than or equal to 0 for no timeout.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `timeout` - new validation query timeout value in seconds

    - #### getConnectionInitSqls

          public List<String> getConnectionInitSqls()

      Returns the list of SQL statements executed when a physical connection is first created. Returns an empty list if there are no initialization statements configured.
      Returns:
        initialization SQL statements

    - #### getConnectionInitSqlsAsArray

          public String[] getConnectionInitSqlsAsArray()

      Provides the same data as `getConnectionInitSqls()` but in an array so it is accessible via JMX.
      Specified by:
        `getConnectionInitSqlsAsArray` in interface `BasicDataSourceMXBean`
      Returns:
        `getConnectionInitSqlsAsArray()`

    - #### setConnectionInitSqls

          public void setConnectionInitSqls(Collection<String> connectionInitSqls)

      Sets the list of SQL statements to be executed when a physical connection is first created.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `connectionInitSqls` - Collection of SQL statements to execute on connection creation

    - #### isAccessToUnderlyingConnectionAllowed

          public boolean isAccessToUnderlyingConnectionAllowed()

      Returns the value of the accessToUnderlyingConnectionAllowed property.
      Specified by:
        `isAccessToUnderlyingConnectionAllowed` in interface `BasicDataSourceMXBean`
      Returns:
        true if access to the underlying connection is allowed, false otherwise.

    - #### setAccessToUnderlyingConnectionAllowed

          public void setAccessToUnderlyingConnectionAllowed(boolean allow)

      Sets the value of the accessToUnderlyingConnectionAllowed property. It controls if the PoolGuard allows access to the underlying connection. (Default: false)

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

      Parameters:
        `allow` - Access to the underlying connection is granted when true.

    - #### getMaxConnLifetimeMillis

          public long getMaxConnLifetimeMillis()

      Returns the maximum permitted lifetime of a connection in milliseconds. A value of zero or less indicates an infinite lifetime.
      Specified by:
        `getMaxConnLifetimeMillis` in interface `BasicDataSourceMXBean`
      Returns:
        `getMaxConnLifetimeMillis()`

    - #### setMaxConnLifetimeMillis

          public void setMaxConnLifetimeMillis(long maxConnLifetimeMillis)

      Sets the maximum permitted lifetime of a connection in milliseconds. A value of zero or less indicates an infinite lifetime.

      Note: this method currently has no effect once the pool has been initialized. The pool is initialized the first time one of the following methods is invoked: `getConnection, setLogwriter, setLoginTimeout, getLoginTimeout, getLogWriter.`

    - #### getJmxName

          public String getJmxName()

      Returns the JMX name that has been requested for this DataSource. If the requested name is not valid, an alternative may be chosen.

    - #### setJmxName

          public void setJmxName(String jmxName)

      Sets the JMX name that has been requested for this DataSource. If the requested name is not valid, an alternative may be chosen. This DataSource will attempt to register itself using this name. If another component registers this DataSource with JMX and this name is valid this name will be used in preference to any specified by the other component.

    - #### getEnableAutoCommitOnReturn

          public boolean getEnableAutoCommitOnReturn()

      Returns the value of the flag that controls whether or not connections being returned to the pool will checked and configured with `Connection.setAutoCommit(true)` if the auto commit setting is `false when the connection is returned. It is `true` by default.`

    - #### setEnableAutoCommitOnReturn

          public void setEnableAutoCommitOnReturn(boolean enableAutoCommitOnReturn)

      Sets the value of the flag that controls whether or not connections being returned to the pool will checked and configured with `Connection.setAutoCommit(true)` if the auto commit setting is `false when the connection is returned. It is `true` by default.`

    - #### getRollbackOnReturn

          public boolean getRollbackOnReturn()

      Gets the current value of the flag that controls if a connection will be rolled back when it is returned to the pool if auto commit is not enabled and the connection is not read only.

    - #### setRollbackOnReturn

          public void setRollbackOnReturn(boolean rollbackOnReturn)

      Sets the flag that controls if a connection will be rolled back when it is returned to the pool if auto commit is not enabled and the connection is not read only.

    - #### getConnectionPool

          protected org.apache.commons.pool2.impl.GenericObjectPool<PoolableConnection> getConnectionPool()

    - #### getConnection

          public Connection getConnection()
                                   throws SQLException

      Create (if necessary) and return a connection to the database.
      Specified by:
        `getConnection` in interface `DataSource`
      Returns:
        a database connection
      Throws:
        `SQLException` - if a database access error occurs

    - #### getConnection

          public Connection getConnection(String user,
                                 String pass)
                                   throws SQLException

      BasicDataSource does NOT support this method.
      Specified by:
        `getConnection` in interface `DataSource`
      Parameters:
        `user` - Database user on whose behalf the Connection is being made
        `pass` - The database user's password
      Returns:
        nothing - always throws UnsupportedOperationException
      Throws:
        `UnsupportedOperationException`
        `SQLException` - if a database access error occurs

    - #### getLoginTimeout

          public int getLoginTimeout()
                              throws SQLException

      BasicDataSource does NOT support this method.

      Returns the login timeout (in seconds) for connecting to the database.

      Calls `createDataSource()`, so has the side effect of initializing the connection pool.

      Specified by:
        `getLoginTimeout` in interface `CommonDataSource`
      Returns:
        login timeout in seconds
      Throws:
        `SQLException` - if a database access error occurs
        `UnsupportedOperationException` - If the DataSource implementation does not support the login timeout feature.

    - #### getLogWriter

          public PrintWriter getLogWriter()
                                   throws SQLException

      Returns the log writer being used by this data source.

      Calls `createDataSource()`, so has the side effect of initializing the connection pool.

      Specified by:
        `getLogWriter` in interface `CommonDataSource`
      Returns:
        log writer in use
      Throws:
        `SQLException` - if a database access error occurs

    - #### setLoginTimeout

          public void setLoginTimeout(int loginTimeout)
                               throws SQLException

      BasicDataSource does NOT support this method.

      Set the login timeout (in seconds) for connecting to the database.

      Calls `createDataSource()`, so has the side effect of initializing the connection pool.

      Specified by:
        `setLoginTimeout` in interface `CommonDataSource`
      Parameters:
        `loginTimeout` - The new login timeout, or zero for no timeout
      Throws:
        `UnsupportedOperationException` - If the DataSource implementation does not support the login timeout feature.
        `SQLException` - if a database access error occurs

    - #### setLogWriter

          public void setLogWriter(PrintWriter logWriter)
                            throws SQLException

      Sets the log writer being used by this data source.

      Calls `createDataSource()`, so has the side effect of initializing the connection pool.

      Specified by:
        `setLogWriter` in interface `CommonDataSource`
      Parameters:
        `logWriter` - The new log writer
      Throws:
        `SQLException` - if a database access error occurs

    - #### getRemoveAbandonedOnBorrow

          public boolean getRemoveAbandonedOnBorrow()

      Flag to remove abandoned connections if they exceed the removeAbandonedTimeout when borrowObject is invoked.

      The default value is false.

      If set to true a connection is considered abandoned and eligible for removal if it has not been used for more than `removeAbandonedTimeout` seconds.

      Abandoned connections are identified and removed when `getConnection()` is invoked and the following conditions hold

      - `getRemoveAbandonedOnBorrow()` or `getRemoveAbandonedOnMaintenance()` = true
      - `getNumActive()` > `getMaxTotal()` - 3
      - `getNumIdle()` < 2
      Specified by:
        `getRemoveAbandonedOnBorrow` in interface `BasicDataSourceMXBean`
      Returns:
        `getRemoveAbandonedOnBorrow()`
      See Also:
        `getRemoveAbandonedTimeout()`

    - #### setRemoveAbandonedOnMaintenance

          public void setRemoveAbandonedOnMaintenance(boolean removeAbandonedOnMaintenance)

      Flag to remove abandoned connections if they exceed the removeAbandonedTimeout when borrowObject is invoked.

      If set to true a connection is considered abandoned and eligible for removal if it has been idle longer than the `removeAbandonedTimeout`.

      Setting this to true can recover db connections from poorly written applications which fail to close a connection.

      Parameters:
        `removeAbandonedOnMaintenance` - true means abandoned connections will be removed when borrowObject is invoked

    - #### getRemoveAbandonedOnMaintenance

          public boolean getRemoveAbandonedOnMaintenance()

      Flag to remove abandoned connections if they exceed the removeAbandonedTimeout during pool maintenance.

      The default value is false.

      If set to true a connection is considered abandoned and eligible for removal if it has not been used for more than `removeAbandonedTimeout` seconds.

      Abandoned connections are identified and removed when `getConnection()` is invoked and the following conditions hold

      - `getRemoveAbandonedOnBorrow()` or `getRemoveAbandonedOnMaintenance()` = true
      - `getNumActive()` > `getMaxTotal()` - 3
      - `getNumIdle()` < 2
      Specified by:
        `getRemoveAbandonedOnMaintenance` in interface `BasicDataSourceMXBean`
      Returns:
        `getRemoveAbandonedOnMaintenance()`
      See Also:
        `getRemoveAbandonedTimeout()`

    - #### setRemoveAbandonedOnBorrow

          public void setRemoveAbandonedOnBorrow(boolean removeAbandonedOnBorrow)

      Flag to remove abandoned connections if they exceed the removeAbandonedTimeout during pool maintenance.

      If set to true a connection is considered abandoned and eligible for removal if it has been idle longer than the `removeAbandonedTimeout`.

      Setting this to true can recover db connections from poorly written applications which fail to close a connection.

      Parameters:
        `removeAbandonedOnBorrow` - true means abandoned connections will be removed during pool maintenance

    - #### getRemoveAbandonedTimeout

          public int getRemoveAbandonedTimeout()

      Timeout in seconds before an abandoned connection can be removed.

      Creating a Statement, PreparedStatement or CallableStatement or using one of these to execute a query (using one of the execute methods) resets the lastUsed property of the parent connection.

      Abandoned connection cleanup happens when ``

      - `getRemoveAbandonedOnBorrow()` or `getRemoveAbandonedOnMaintenance()` = true
      - `numIdle` < 2
      - `numActive` > `maxTotal` - 3

      The default value is 300 seconds.

      Specified by:
        `getRemoveAbandonedTimeout` in interface `BasicDataSourceMXBean`
      Returns:
        `getRemoveAbandonedTimeout()`

    - #### setRemoveAbandonedTimeout

          public void setRemoveAbandonedTimeout(int removeAbandonedTimeout)

      Sets the timeout in seconds before an abandoned connection can be removed.

      Setting this property has no effect if `getRemoveAbandonedOnBorrow()` and `getRemoveAbandonedOnMaintenance()` are false.

      Parameters:
        `removeAbandonedTimeout` - new abandoned timeout in seconds
      See Also:
        `getRemoveAbandonedTimeout()`, `getRemoveAbandonedOnBorrow()`, `getRemoveAbandonedOnMaintenance()`

    - #### getLogAbandoned

          public boolean getLogAbandoned()

      Flag to log stack traces for application code which abandoned a Statement or Connection.

      Defaults to false.

      Logging of abandoned Statements and Connections adds overhead for every Connection open or new Statement because a stack trace has to be generated.

      Specified by:
        `getLogAbandoned` in interface `BasicDataSourceMXBean`
      Returns:
        `getLogAbandoned()`

    - #### setLogAbandoned

          public void setLogAbandoned(boolean logAbandoned)

      Parameters:
        `logAbandoned` - new logAbandoned property value

    - #### getAbandonedLogWriter

          public PrintWriter getAbandonedLogWriter()

      Gets the log writer to be used by this configuration to log information on abandoned objects.

    - #### setAbandonedLogWriter

          public void setAbandonedLogWriter(PrintWriter logWriter)

      Sets the log writer to be used by this configuration to log information on abandoned objects.
      Parameters:
        `logWriter` - The new log writer

    - #### getAbandonedUsageTracking

          public boolean getAbandonedUsageTracking()

      If the connection pool implements `UsageTracking`, should the connection pool record a stack trace every time a method is called on a pooled connection and retain the most recent stack trace to aid debugging of abandoned connections?
      Specified by:
        `getAbandonedUsageTracking` in interface `BasicDataSourceMXBean`
      Returns:
        `true` if usage tracking is enabled

    - #### setAbandonedUsageTracking

          public void setAbandonedUsageTracking(boolean usageTracking)

      If the connection pool implements `UsageTracking`, configure whether the connection pool should record a stack trace every time a method is called on a pooled connection and retain the most recent stack trace to aid debugging of abandoned connections.
      Parameters:
        `usageTracking` - A value of `true` will enable the recording of a stack trace on every use of a pooled connection

    - #### addConnectionProperty

          public void addConnectionProperty(String name,
                                   String value)

      Add a custom connection property to the set that will be passed to our JDBC driver. This MUST be called before the first connection is retrieved (along with all the other configuration property setters). Calls to this method after the connection pool has been initialized have no effect.
      Parameters:
        `name` - Name of the custom connection property
        `value` - Value of the custom connection property

    - #### removeConnectionProperty

          public void removeConnectionProperty(String name)

      Remove a custom connection property.
      Parameters:
        `name` - Name of the custom connection property to remove
      See Also:
        `addConnectionProperty(String, String)`

    - #### setConnectionProperties

          public void setConnectionProperties(String connectionProperties)

      Sets the connection properties passed to driver.connect(...). Format of the string must be [propertyName=property;]* NOTE - The "user" and "password" properties will be added explicitly, so they do not need to be included here.
      Parameters:
        `connectionProperties` - the connection properties used to create new connections

    - #### close

          public void close()
                     throws SQLException

      Closes and releases all idle connections that are currently stored in the connection pool associated with this data source.

      Connections that are checked out to clients when this method is invoked are not affected. When client applications subsequently invoke `Connection.close()` to return these connections to the pool, the underlying JDBC connections are closed.

      Attempts to acquire connections using `getConnection()` after this method has been invoked result in SQLExceptions.

      This method is idempotent - i.e., closing an already closed BasicDataSource has no effect and does not generate exceptions.

      Throws:
        `SQLException` - if an error occurs closing idle connections

    - #### isClosed

          public boolean isClosed()

      If true, this data source is closed and no more connections can be retrieved from this datasource.
      Specified by:
        `isClosed` in interface `BasicDataSourceMXBean`
      Returns:
        true, if the data source is closed; false otherwise

    - #### isWrapperFor

          public boolean isWrapperFor(Class<?> iface)
                               throws SQLException

      Specified by:
        `isWrapperFor` in interface `Wrapper`
      Throws:
        `SQLException`

    - #### unwrap

          public <T> T unwrap(Class<T> iface)
                   throws SQLException

      Specified by:
        `unwrap` in interface `Wrapper`
      Throws:
        `SQLException`

    - #### getParentLogger

          public Logger getParentLogger()
                                 throws SQLFeatureNotSupportedException

      Specified by:
        `getParentLogger` in interface `CommonDataSource`
      Throws:
        `SQLFeatureNotSupportedException`

    - #### createDataSource

          protected DataSource createDataSource()
                                         throws SQLException

      Create (if necessary) and return the internal data source we are using to manage our connections.

      Throws:
        `SQLException` - if the object pool cannot be created.

    - #### createConnectionFactory

          protected ConnectionFactory createConnectionFactory()
                                                       throws SQLException

      Creates a JDBC connection factory for this datasource. The JDBC driver is loaded using the following algorithm:
      1. If a Driver instance has been specified via `setDriver(Driver)` use it
      2. If no Driver instance was specified and `driverClassName` is specified that class is loaded using the `ClassLoader` of this class or, if `driverClassLoader` is set, `driverClassName` is loaded with the specified `ClassLoader`.
      3. If `driverClassName` is specified and the previous attempt fails, the class is loaded using the context class loader of the current thread.
      4. If a driver still isn't loaded one is loaded via the `DriverManager` using the specified `url`.
      This method exists so subclasses can replace the implementation class.
      Throws:
        `SQLException`

    - #### createConnectionPool

          protected void createConnectionPool(PoolableConnectionFactory factory)

      Creates a connection pool for this datasource. This method only exists so subclasses can replace the implementation class. This implementation configures all pool properties other than timeBetweenEvictionRunsMillis. Setting that property is deferred to `startPoolMaintenance()`, since setting timeBetweenEvictionRunsMillis to a positive value causes `GenericObjectPool`'s eviction timer to be started.

    - #### startPoolMaintenance

          protected void startPoolMaintenance()

      Starts the connection pool maintenance task, if configured.

    - #### createDataSourceInstance

          protected DataSource createDataSourceInstance()
                                                 throws SQLException

      Creates the actual data source instance. This method only exists so that subclasses can replace the implementation class.
      Throws:
        `SQLException` - if unable to create a datasource instance

    - #### createPoolableConnectionFactory

          protected PoolableConnectionFactory createPoolableConnectionFactory(ConnectionFactory driverConnectionFactory)
                                                                       throws SQLException

      Creates the PoolableConnectionFactory and attaches it to the connection pool. This method only exists so subclasses can replace the default implementation.
      Parameters:
        `driverConnectionFactory` - JDBC connection factory
      Throws:
        `SQLException` - if an error occurs creating the PoolableConnectionFactory

    - #### validateConnectionFactory

          protected static void validateConnectionFactory(PoolableConnectionFactory connectionFactory)
                                                   throws Exception

      Throws:
        `Exception`

    - #### log

          protected void log(String message)

    - #### preRegister

          public ObjectName preRegister(MBeanServer server,
                               ObjectName name)

      Specified by:
        `preRegister` in interface `MBeanRegistration`

    - #### postRegister

          public void postRegister(Boolean registrationDone)

      Specified by:
        `postRegister` in interface `MBeanRegistration`

    - #### preDeregister

          public void preDeregister()
                             throws Exception

      Specified by:
        `preDeregister` in interface `MBeanRegistration`
      Throws:
        `Exception`

    - #### postDeregister

          public void postDeregister()

      Specified by:
        `postDeregister` in interface `MBeanRegistration`

    - #### getRegisteredJmxName

          protected ObjectName getRegisteredJmxName()

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