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oracle.jdbc.pool
Class OraclePooledConnection

java.lang.Object
oracle.jdbc.pool.OraclePooledConnection

All Implemented Interfaces:

java.io.Serializable, javax.sql.PooledConnection

Direct Known Subclasses:

OracleXAConnection

public class OraclePooledConnection

extends java.lang.Object

implements javax.sql.PooledConnection, java.io.Serializable

An OraclePooledConnection object is a connection object that provides hooks for connection pool management. A PooledConnection object represents a physical connection to a data source. It implements javax.sql.PooledConnection

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Serialized Form

Field Summary

java.util.Properties	cachedConnectionAttributes
static java.lang.String	close_callback_string
int	closeOption
static java.lang.String	connect_auto_commit_string
static java.lang.String	connection_properties_string
static java.lang.String	event_listener_string
static java.lang.String	explicit_caching_enabled
static java.lang.String	ExplicitStatementCachingEnabled
static java.lang.String	implicit_caching_enabled
static java.lang.String	ImplicitStatementCachingEnabled
static java.lang.String	isClearMetaData
static java.lang.String	LoginTimeout
static java.lang.String	object_type_map
static java.lang.String	pool_auto_commit_string
static java.lang.String	private_data
static java.lang.String	sql_exception_string
static java.lang.String	statement_cache_size
static boolean	TRACE
static java.lang.String	transaction_isolation
java.util.Properties	unMatchedCachedConnAttr
static java.lang.String	url_string

Constructor Summary

OraclePooledConnection()

OraclePooledConnection(java.sql.Connection pc)
Create a Pooled Connection.

OraclePooledConnection(java.sql.Connection pc, boolean ac)
Create a Pooled Connection.

OraclePooledConnection(java.lang.String url)
Creates a PooledConnection.

OraclePooledConnection(java.lang.String url, java.lang.String user, java.lang.String passwd)
Creates a PooledConnection.

Method Summary

void	addConnectionEventListener(javax.sql.ConnectionEventListener cel) Add an event listener.
void	close() Close the physical connection.
java.sql.CallableStatement	getCallWithKey(java.lang.String key) getCallWithKey Searches the explicit cache for a match on key.
java.sql.Connection	getConnection() Create an object handle for this physical connection.
boolean	getExplicitCachingEnabled() getExplicitCachingEnabled Returns true if the explicit cache is currently enabled, false otherwise.
boolean	getImplicitCachingEnabled() getImplicitCachingEnabled Returns true if the implicit cache is currently enabled, false otherwise.
long	getLastAccessedTime() Get the last accessed time on the PooledConnection.
java.sql.Connection	getLogicalHandle() Return the logical handle to the caller.
java.sql.Connection	getPhysicalHandle()
int	getStatementCacheSize() getStatementCacheSize Returns the current size of the application cache.
java.sql.PreparedStatement	getStatementWithKey(java.lang.String key) getStatementWithKey Searches the explicit cache for a match on key.
int	getStmtCacheSize() Deprecated.
javax.transaction.xa.XAResource	getXAResource() Return an XA resource to the caller.
boolean	isStatementCacheInitialized()
void	purgeExplicitCache() purgeExplicitCache Removes all existing statements from the explicit cache, after which it will be empty.
void	purgeImplicitCache() purgeImplicitCache Removes all existing statements from the implicit cache, after which it will be empty.
void	registerImplicitCacheConnectionEventListener(javax.sql.ConnectionEventListener cel) Register an event listener for the implicit connection cache.
void	removeConnectionEventListener(javax.sql.ConnectionEventListener cel) Remove an event listener.
void	setExplicitCachingEnabled(boolean cache) setExplicitCachingEnabled Enables or disables the explicit cache.
void	setImplicitCachingEnabled(boolean cache) setImplicitCachingEnabled Enables or disables the implicit cache.
void	setLastAccessedTime(long lastAccessedTime) Set the last accessed time on the PooledConnection.
void	setProperties(java.util.Hashtable prop)
void	setStatementCacheSize(int size) setStatementCacheSize Specifies the size of the size of the application cache (which will be used by both implicit and explicit caching).
void	setStmtCacheSize(int size) Deprecated.
void	setStmtCacheSize(int size, boolean clearMetaData) Deprecated.

Methods inherited from class java.lang.Object

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

Field Detail

url_string

public static final java.lang.String url_string

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Constant Field Values

pool_auto_commit_string

public static final java.lang.String pool_auto_commit_string

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Constant Field Values

object_type_map

public static final java.lang.String object_type_map

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Constant Field Values

transaction_isolation

public static final java.lang.String transaction_isolation

See Also:

Constant Field Values

statement_cache_size

public static final java.lang.String statement_cache_size

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Constant Field Values

isClearMetaData

public static final java.lang.String isClearMetaData

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Constant Field Values

ImplicitStatementCachingEnabled

public static final java.lang.String ImplicitStatementCachingEnabled

See Also:

Constant Field Values

ExplicitStatementCachingEnabled

public static final java.lang.String ExplicitStatementCachingEnabled

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Constant Field Values

LoginTimeout

public static final java.lang.String LoginTimeout

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Constant Field Values

connect_auto_commit_string

public static final java.lang.String connect_auto_commit_string

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Constant Field Values

implicit_caching_enabled

public static final java.lang.String implicit_caching_enabled

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Constant Field Values

explicit_caching_enabled

public static final java.lang.String explicit_caching_enabled

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Constant Field Values

connection_properties_string

public static final java.lang.String connection_properties_string

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Constant Field Values

event_listener_string

public static final java.lang.String event_listener_string

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Constant Field Values

sql_exception_string

public static final java.lang.String sql_exception_string

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Constant Field Values

close_callback_string

public static final java.lang.String close_callback_string

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Constant Field Values

private_data

public static final java.lang.String private_data

See Also:

Constant Field Values

cachedConnectionAttributes

public java.util.Properties cachedConnectionAttributes

unMatchedCachedConnAttr

public java.util.Properties unMatchedCachedConnAttr

closeOption

public int closeOption

TRACE

public static final boolean TRACE

See Also:

Constant Field Values

Constructor Detail

OraclePooledConnection

public OraclePooledConnection()

OraclePooledConnection

public OraclePooledConnection(java.lang.String url)
                       throws java.sql.SQLException

Creates a PooledConnection.

Parameters:

url - URL of the physical connection.

Throws:

java.sql.SQLException

OraclePooledConnection

public OraclePooledConnection(java.lang.String url,
                              java.lang.String user,
                              java.lang.String passwd)
                       throws java.sql.SQLException

Creates a PooledConnection.

Parameters:

url - URL of the physical connection.

user - User Name

passwd - Password

Throws:

java.sql.SQLException

OraclePooledConnection

public OraclePooledConnection(java.sql.Connection pc)

Create a Pooled Connection.

Parameters:

pc - The corresponding physical connection.

OraclePooledConnection

public OraclePooledConnection(java.sql.Connection pc,
                              boolean ac)

Create a Pooled Connection.

Parameters:

pc - The corresponding physical connection

ac - autoCommit value

Method Detail

addConnectionEventListener

public void addConnectionEventListener(javax.sql.ConnectionEventListener cel)

Add an event listener.

Specified by:

addConnectionEventListener in interface javax.sql.PooledConnection

Parameters:

cel - The listener to be added

close

public void close()
           throws java.sql.SQLException

Close the physical connection.

Specified by:

close in interface javax.sql.PooledConnection

Throws:

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

getConnection

public java.sql.Connection getConnection()
                                  throws java.sql.SQLException

Create an object handle for this physical connection. The object returned is a temporary handle used by application code to refer to a physical connection that is being pooled.

Specified by:

getConnection in interface javax.sql.PooledConnection

Returns:

a Connection object

Throws:

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

getLogicalHandle

public java.sql.Connection getLogicalHandle()
                                     throws java.sql.SQLException

Return the logical handle to the caller. This logical handle refers to the physical connection that is pooled.

Returns:

a Connection object

Throws:

java.sql.SQLException

getPhysicalHandle

public java.sql.Connection getPhysicalHandle()
                                      throws java.sql.SQLException

Throws:

java.sql.SQLException

setLastAccessedTime

public void setLastAccessedTime(long lastAccessedTime)
                         throws java.sql.SQLException

Set the last accessed time on the PooledConnection. This is used by the inactivity timeout thread

Parameters:

lastAccessedTime, - last accessed time in milliseconds

Throws:

java.sql.SQLException

getLastAccessedTime

public long getLastAccessedTime()
                         throws java.sql.SQLException

Get the last accessed time on the PooledConnection. This is used by the inactivity timeout thread

Returns:

long (milliseconds)

Throws:

java.sql.SQLException

removeConnectionEventListener

public void removeConnectionEventListener(javax.sql.ConnectionEventListener cel)

Remove an event listener.

Specified by:

removeConnectionEventListener in interface javax.sql.PooledConnection

Parameters:

cel - The listener to be removed.

registerImplicitCacheConnectionEventListener

public void registerImplicitCacheConnectionEventListener(javax.sql.ConnectionEventListener cel)

Register an event listener for the implicit connection cache.

Parameters:

cel - The listener to be registered

setStmtCacheSize

public void setStmtCacheSize(int size)
                      throws java.sql.SQLException

Deprecated.

Set the statement cache size. Default is 0. You cannot call this for logicalhandles obtained from PooledConnections.

If more than <it> size </it> cursors are already cached than they will be closed. By default the meta data of the cursor will be saved. Only data and the state will be cleared. You need to call this first to enable either type of Statement caching. When both types of Statement caching are enabled, the <it> size </size> is the total number of cursors cached for both the schemes together.

Parameters:

size - Size of the Cache

Throws:

java.sql.SQLException

setStmtCacheSize

public void setStmtCacheSize(int size,
                             boolean clearMetaData)
                      throws java.sql.SQLException

Deprecated.

Set the statement cache size. Default is 0. You cannot call this for logicalhandles obtained from PooledConnections.

If more than <it> size </it> cursors are already cached than they will be closed. By default, the meta data of the cursor will be saved. But if clearMetaData is set to true, even that will be cleared. You need to call this first to enable either type of Statement caching. When both types of Statement caching are enabled, the <it> size </size> is the total number of cursors cached for both the schemes together.

Parameters:

size - Size of the Cache

clearMetaData - Whether the state has to be cleared or not

Throws:

java.sql.SQLException

getStmtCacheSize

public int getStmtCacheSize()

Deprecated.

Return the size of Statement Cache.

Returns:

int Size of Statement Cache. If not set, the default 0 is returned.

setStatementCacheSize

public void setStatementCacheSize(int size)
                           throws java.sql.SQLException

setStatementCacheSize Specifies the size of the size of the application cache (which will be used by both implicit and explicit caching).

Parameters:

size - Requested size of the cache. If the existing cache size is less than size, statements will be purged to reduce the size.

Throws:

java.sql.SQLException - if size < 0, or if called on a logical connection.

getStatementCacheSize

public int getStatementCacheSize()
                          throws java.sql.SQLException

getStatementCacheSize Returns the current size of the application cache. This is valid on both physical and logical connections.

Throws:

java.sql.SQLException

setImplicitCachingEnabled

public void setImplicitCachingEnabled(boolean cache)
                               throws java.sql.SQLException

setImplicitCachingEnabled Enables or disables the implicit cache. Note that this is independent of the cache size, set with setStatmentCacheSize().

Parameters:

cache - If true, then implicit caching will be enabled. If false, then any existing statements will be purged and the implicit cache will be disabled.

Throws:

java.sql.SQLException - if called on a logical connection.

getImplicitCachingEnabled

public boolean getImplicitCachingEnabled()
                                  throws java.sql.SQLException

getImplicitCachingEnabled Returns true if the implicit cache is currently enabled, false otherwise. This method is valid on both logical and physical connections.

Throws:

java.sql.SQLException

setExplicitCachingEnabled

public void setExplicitCachingEnabled(boolean cache)
                               throws java.sql.SQLException

setExplicitCachingEnabled Enables or disables the explicit cache. Note that this is independent of the cache size, set with setStatmentCacheSize().

Parameters:

cache - If true, then explicit caching will be enabled. If false, then any existing statements will be purged and the explicit cache will be disabled.

Throws:

java.sql.SQLException - if called on a logical connection.

getExplicitCachingEnabled

public boolean getExplicitCachingEnabled()
                                  throws java.sql.SQLException

getExplicitCachingEnabled Returns true if the explicit cache is currently enabled, false otherwise. This method is valid on both logical and physical connections.

Throws:

java.sql.SQLException

purgeImplicitCache

public void purgeImplicitCache()
                        throws java.sql.SQLException

purgeImplicitCache Removes all existing statements from the implicit cache, after which it will be empty. This method does not affect the size of the application cache, nor the enabled/disabled status.

Throws:

java.sql.SQLException

purgeExplicitCache

public void purgeExplicitCache()
                        throws java.sql.SQLException

purgeExplicitCache Removes all existing statements from the explicit cache, after which it will be empty. This method does not affect the size of the application cache, nor the enabled/disabled status.

Throws:

java.sql.SQLException

getStatementWithKey

public java.sql.PreparedStatement getStatementWithKey(java.lang.String key)
                                               throws java.sql.SQLException

getStatementWithKey Searches the explicit cache for a match on key. If found, the statement is returned, with the paramater and define metadata identical to the last usage. If a CallableStatement is found (instead of a PreparedStatement, ORA-17125 is raised. If no match is found, or if explicit caching is not enabled, null is returned.

Parameters:

key - Specified key to search for

Throws:

java.sql.SQLException

getCallWithKey

public java.sql.CallableStatement getCallWithKey(java.lang.String key)
                                          throws java.sql.SQLException

getCallWithKey Searches the explicit cache for a match on key. If found, the statement is returned, with the paramater and define metadata identical to the last usage. If a PreparedStatement is found (instead of a CallableStatement, ORA-17125 is raised. If no match is found, or if explicit caching is not enabled, null is returned.

Parameters:

key - Specified key to search for

Throws:

java.sql.SQLException

isStatementCacheInitialized

public boolean isStatementCacheInitialized()

setProperties

public final void setProperties(java.util.Hashtable prop)

getXAResource

public javax.transaction.xa.XAResource getXAResource()
                                              throws java.sql.SQLException

Return an XA resource to the caller. This is just a placeholder. Only the one on XAConnection is meaningful.

Returns:

the XAResource (null if error occurs)

Throws:

java.sql.SQLException - if a database error occurs

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