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javax.sql.PooledConnection

An object that provides hooks for connection pool management. A PooledConnection object represents a physical connection to a data source. The connection can be recycled rather than being closed when an application is finished with it, thus reducing the number of connections that need to be made.

An application programmer does not use the PooledConnection interface directly; rather, it is used by a middle tier infrastructure that manages the pooling of connections.

When an application calls the method DataSource.getConnection, it gets back a Connection object. If connection pooling is being done, that Connection object is actually a handle to a PooledConnection object, which is a physical connection.

The connection pool manager, typically the application server, maintains a pool of PooledConnection objects. If there is a PooledConnection object available in the pool, the connection pool manager returns a Connection object that is a handle to that physical connection. If no PooledConnection object is available, the connection pool manager calls the ConnectionPoolDataSource method getPoolConnection to create a new physical connection. The JDBC driver implementing ConnectionPoolDataSource creates a new PooledConnection object and returns a handle to it.

When an application closes a connection, it calls the Connection method close. When connection pooling is being done, the connection pool manager is notified because it has registered itself as a ConnectionEventListener object using the ConnectionPool method addConnectionEventListener. The connection pool manager deactivates the handle to the PooledConnection object and returns the PooledConnection object to the pool of connections so that it can be used again. Thus, when an application closes its connection, the underlying physical connection is recycled rather than being closed.

The physical connection is not closed until the connection pool manager calls the PooledConnection method close. This method is generally called to have an orderly shutdown of the server or if a fatal error has made the connection unusable.

A connection pool manager is often also a statement pool manager, maintaining a pool of PreparedStatement objects. When an application closes a prepared statement, it calls the PreparedStatement method close. When Statement pooling is being done, the pool manager is notified because it has registered itself as a StatementEventListener object using the ConnectionPool method addStatementEventListener. Thus, when an application closes its PreparedStatement, the underlying prepared statement is recycled rather than being closed.

An object that provides hooks for connection pool management.
A PooledConnection object
represents a physical connection to a data source.  The connection
can be recycled rather than being closed when an application is
finished with it, thus reducing the number of connections that
need to be made.

An application programmer does not use the PooledConnection
interface directly; rather, it is used by a middle tier infrastructure
that manages the pooling of connections.

When an application calls the method DataSource.getConnection,
it gets back a Connection object.  If connection pooling is
being done, that Connection object is actually a handle to
a PooledConnection object, which is a physical connection.

The connection pool manager, typically the application server, maintains
a pool of PooledConnection objects.  If there is a
PooledConnection object available in the pool, the
connection pool manager returns a Connection object that
is a handle to that physical connection.
If no PooledConnection object is available, the
connection pool manager calls the ConnectionPoolDataSource
method getPoolConnection to create a new physical connection.  The
 JDBC driver implementing ConnectionPoolDataSource creates a
 new PooledConnection object and returns a handle to it.

When an application closes a connection, it calls the Connection
method close. When connection pooling is being done,
the connection pool manager is notified because it has registered itself as
a ConnectionEventListener object using the
ConnectionPool method addConnectionEventListener.
The connection pool manager deactivates the handle to
the PooledConnection object and  returns the
PooledConnection object to the pool of connections so that
it can be used again.  Thus, when an application closes its connection,
the underlying physical connection is recycled rather than being closed.

The physical connection is not closed until the connection pool manager
calls the PooledConnection method close.
This method is generally called to have an orderly shutdown of the server or
if a fatal error has made the connection unusable.


A connection pool manager is often also a statement pool manager, maintaining
 a pool of PreparedStatement objects.
 When an application closes a prepared statement, it calls the
 PreparedStatement
method close. When Statement pooling is being done,
the pool manager is notified because it has registered itself as
a StatementEventListener object using the
ConnectionPool method addStatementEventListener.
 Thus, when an application closes its  PreparedStatement,
the underlying prepared statement is recycled rather than being closed.
raw docstring

add-connection-event-listenerclj

(add-connection-event-listener this listener)

Registers the given event listener so that it will be notified when an event occurs on this PooledConnection object.

listener - a component, usually the connection pool manager, that has implemented the ConnectionEventListener interface and wants to be notified when the connection is closed or has an error - javax.sql.ConnectionEventListener

Registers the given event listener so that it will be notified
 when an event occurs on this PooledConnection object.

listener - a component, usually the connection pool manager, that has implemented the ConnectionEventListener interface and wants to be notified when the connection is closed or has an error - `javax.sql.ConnectionEventListener`
raw docstring

add-statement-event-listenerclj

(add-statement-event-listener this listener)

Registers a StatementEventListener with this PooledConnection object. Components that wish to be notified when PreparedStatements created by the connection are closed or are detected to be invalid may use this method to register a StatementEventListener with this PooledConnection object.

listener - an component which implements the StatementEventListener interface that is to be registered with this PooledConnection object - javax.sql.StatementEventListener

Registers a StatementEventListener with this PooledConnection object.  Components that
 wish to be notified when  PreparedStatements created by the
 connection are closed or are detected to be invalid may use this method
 to register a StatementEventListener with this PooledConnection object.

listener - an component which implements the StatementEventListener interface that is to be registered with this PooledConnection object - `javax.sql.StatementEventListener`
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closeclj

(close this)

Closes the physical connection that this PooledConnection object represents. An application never calls this method directly; it is called by the connection pool module, or manager.

See the interface description for more information.

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

Closes the physical connection that this PooledConnection
 object represents.  An application never calls this method directly;
 it is called by the connection pool module, or manager.

 See the interface description for more
 information.

throws: java.sql.SQLException - if a database access error occurs
raw docstring

get-connectionclj

(get-connection this)

Creates and returns a Connection object that is a handle for the physical connection that this PooledConnection object represents. The connection pool manager calls this method when an application has called the method DataSource.getConnection and there are no PooledConnection objects available. See the interface description for more information.

returns: a Connection object that is a handle to this PooledConnection object - java.sql.Connection

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

Creates and returns a Connection object that is a handle
 for the physical connection that
 this PooledConnection object represents.
 The connection pool manager calls this method when an application has
 called the method DataSource.getConnection and there are
 no PooledConnection objects available. See the
 interface description for more information.

returns: a Connection object that is a handle to
          this PooledConnection object - `java.sql.Connection`

throws: java.sql.SQLException - if a database access error occurs
raw docstring

remove-connection-event-listenerclj

(remove-connection-event-listener this listener)

Removes the given event listener from the list of components that will be notified when an event occurs on this PooledConnection object.

listener - a component, usually the connection pool manager, that has implemented the ConnectionEventListener interface and been registered with this PooledConnection object as a listener - javax.sql.ConnectionEventListener

Removes the given event listener from the list of components that
 will be notified when an event occurs on this
 PooledConnection object.

listener - a component, usually the connection pool manager, that has implemented the ConnectionEventListener interface and been registered with this PooledConnection object as a listener - `javax.sql.ConnectionEventListener`
raw docstring

remove-statement-event-listenerclj

(remove-statement-event-listener this listener)

Removes the specified StatementEventListener from the list of components that will be notified when the driver detects that a PreparedStatement has been closed or is invalid.

listener - the component which implements the StatementEventListener interface that was previously registered with this PooledConnection object - javax.sql.StatementEventListener

Removes the specified StatementEventListener from the list of
 components that will be notified when the driver detects that a
 PreparedStatement has been closed or is invalid.

listener - the component which implements the StatementEventListener interface that was previously registered with this PooledConnection object - `javax.sql.StatementEventListener`
raw docstring

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