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oracle.jdbc.pool
Class OracleOCIConnectionPool

java.lang.Object
oracle.jdbc.pool.OracleDataSource
oracle.jdbc.pool.OracleOCIConnectionPool

All Implemented Interfaces:

Serializable, Wrapper, Referenceable, CommonDataSource, DataSource

public class OracleOCIConnectionPool

extends OracleDataSource

A type-2 driver connection pool.

See Also:

Serialized Form

Field Summary

static String	CONNECTION_ID
static String	CONNECTION_POOL
static String	CONNPOOL_ACTIVE_SIZE
static String	CONNPOOL_ALIASED_CONNECTION
static String	CONNPOOL_CONNECTION
static String	CONNPOOL_INCREMENT
static String	CONNPOOL_IS_POOLCREATED
static String	CONNPOOL_LOGON_MODE
static String	CONNPOOL_MAX_LIMIT
static String	CONNPOOL_MIN_LIMIT
static String	CONNPOOL_NOWAIT
static String	CONNPOOL_OBJECT
static String	CONNPOOL_POOL_SIZE
static String	CONNPOOL_PROXY_CONNECTION
static String	CONNPOOL_TIMEOUT
static String	IS_CONNECTION_POOLING
oracle.jdbc.oci.OracleOCIConnection	m_connection_pool
protected int	m_stmtCacheSize
protected boolean	m_stmtClearMetaData
static String	PROXY_CERTIFICATE
static String	PROXY_DISTINGUISHED_NAME
static String	PROXY_NUM_ROLES
static String	PROXY_PASSWORD
static String	PROXY_ROLES
static String	PROXY_USER_NAME
static String	PROXYTYPE
static String	PROXYTYPE_CERTIFICATE
static String	PROXYTYPE_DISTINGUISHED_NAME
static String	PROXYTYPE_USER_NAME
static boolean	TRACE
static String	TRANSACTIONS_DISTRIBUTED

Fields inherited from class oracle.jdbc.pool.OracleDataSource

cacheManager, connCacheName, connCacheProperties, connCachingEnabled, connectionProperties, databaseName, dataSourceName, description, driver, driverType, explicitCachingEnabled, explicitCachingEnabledSet, fastConnFailover, implicitCachingEnabled, implicitCachingEnabledSet, isOracleDataSource, loginTimeout, logWriter, maxStatements, maxStatementsSet, networkProtocol, odsCache, onsConfigStr, password, portNumber, serverName, serviceName, tnsEntry, url, user

Constructor Summary

OracleOCIConnectionPool()
This will use the user-id, password and connection pool name values set using the methods setUser, setPassword, setConnectionPoolName.

OracleOCIConnectionPool(String us, String p, String url)
Deprecated.

OracleOCIConnectionPool(String us, String p, String url, Properties info)
Notes: Choose a userid and password that can act as proxy for the users in the getProxyConnection() method.

Method Summary

void	close() This will destroy the connection pool, and close all the connections opened from this data source.
void	connectionClosed(oracle.jdbc.oci.OracleOCIConnection conn)
int	getActiveSize() Return the number of active or busy connections in the connection pool Note that the count cannot be guaranteed on any invoking subsequent OracleOCIConnectionCacheImpl method.
oracle.jdbc.internal.OracleConnection	getAliasedConnection(byte[] conId) For creating aliased sessions.
Connection	getConnection() Attempt to establish a database connection.
Connection	getConnection(String us, String p) For getting a connection to the database.
protected oracle.jdbc.internal.OracleConnection	getConnectionDuringExceptionHandling()
int	getConnectionIncrement() Return the Increment for increasing the connections for the Cache.
int	getMaxLimit() Return the Max limit on Connections.
int	getMinLimit() Note: There are no individual setMin, setMax and setIncrement since that needs to be done in one call to setPoolConfig Return the minimum limit on the no of Connections.
String	getNoWait() Return the connection No-wait parameter This attribute determines if retrial for a connection has to be done when all connections in the pool are found to be busy and the number of connections already reached max.
Properties	getPoolConfig()
int	getPoolSize() Return the number of physical connections in the connection pool Note that the count cannot be guaranteed on any invoking subsequent OracleOCIConnectionCacheImpl method.
oracle.jdbc.internal.OracleConnection	getProxyConnection(String proxytype, Properties prop) For creating a proxy connection.
Reference	getReference() Inherited from referenceable
int	getStmtCacheSize() Return the size of Statement Cache.
int	getTimeout() Return the timeout The connections idle for more than this time (seconds) are terminated periodically, to maintain optimum number of open connections.This attribute can be set dynamically.
boolean	isDistributedTransEnabled()
boolean	isPoolCreated() check if the pool has been created.
boolean	isStmtCacheEnabled() Check whether Statement Caching is enabled for this pool or Not.
static void	readPoolConfig(int minLimit, int maxLimit, int increment, int timeout, boolean nowait, boolean transactionsDistributed, int[] p) read the properties into an integer array
static void	readPoolConfig(Properties info, int[] p)
void	setPoolConfig(Properties prop) (Re-)Set the pool configuration for the Cache.
void	setStmtCacheSize(int size) Set the statement cache size.
void	setStmtCacheSize(int size, boolean clearMetaData) Set the statement cache size.

Methods inherited from class oracle.jdbc.pool.OracleDataSource

addRefProperties, copy, getConnection, getConnection, getConnectionCacheName, getConnectionCacheProperties, getConnectionCachingEnabled, getConnectionProperties, getDatabaseName, getDataSourceName, getDescription, getDriverType, getExplicitCachingEnabled, getFastConnectionFailoverEnabled, getImplicitCachingEnabled, getLoginTimeout, getLogWriter, getMaxStatements, getNetworkProtocol, getONSConfiguration, getParentLogger, getPassword, getPhysicalConnection, getPortNumber, getServerName, getServiceName, getTNSEntryName, getURL, getUser, isWrapperFor, setConnectionCacheName, setConnectionCacheProperties, setConnectionCachingEnabled, setConnectionProperties, setDatabaseName, setDataSourceName, setDescription, setDriverType, setExplicitCachingEnabled, setFastConnectionFailoverEnabled, setImplicitCachingEnabled, setLoginTimeout, setLogWriter, setMaxStatements, setNetworkProtocol, setONSConfiguration, setPassword, setPortNumber, setServerName, setServiceName, setTNSEntryName, setURL, setUser, trace, unwrap

Methods inherited from class java.lang.Object

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

Field Detail

m_connection_pool

public oracle.jdbc.oci.OracleOCIConnection m_connection_pool

IS_CONNECTION_POOLING

public static final String IS_CONNECTION_POOLING

See Also:

Constant Field Values

CONNPOOL_OBJECT

public static final String CONNPOOL_OBJECT

See Also:

Constant Field Values

CONNPOOL_LOGON_MODE

public static final String CONNPOOL_LOGON_MODE

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Constant Field Values

CONNECTION_POOL

public static final String CONNECTION_POOL

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Constant Field Values

CONNPOOL_CONNECTION

public static final String CONNPOOL_CONNECTION

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Constant Field Values

CONNPOOL_PROXY_CONNECTION

public static final String CONNPOOL_PROXY_CONNECTION

See Also:

Constant Field Values

CONNPOOL_ALIASED_CONNECTION

public static final String CONNPOOL_ALIASED_CONNECTION

See Also:

Constant Field Values

PROXY_USER_NAME

public static final String PROXY_USER_NAME

See Also:

Constant Field Values

PROXY_DISTINGUISHED_NAME

public static final String PROXY_DISTINGUISHED_NAME

See Also:

Constant Field Values

PROXY_CERTIFICATE

public static final String PROXY_CERTIFICATE

See Also:

Constant Field Values

PROXY_ROLES

public static final String PROXY_ROLES

See Also:

Constant Field Values

PROXY_NUM_ROLES

public static final String PROXY_NUM_ROLES

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Constant Field Values

PROXY_PASSWORD

public static final String PROXY_PASSWORD

See Also:

Constant Field Values

PROXYTYPE

public static final String PROXYTYPE

See Also:

Constant Field Values

PROXYTYPE_USER_NAME

public static final String PROXYTYPE_USER_NAME

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Constant Field Values

PROXYTYPE_DISTINGUISHED_NAME

public static final String PROXYTYPE_DISTINGUISHED_NAME

See Also:

Constant Field Values

PROXYTYPE_CERTIFICATE

public static final String PROXYTYPE_CERTIFICATE

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Constant Field Values

CONNECTION_ID

public static final String CONNECTION_ID

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Constant Field Values

CONNPOOL_MIN_LIMIT

public static final String CONNPOOL_MIN_LIMIT

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Constant Field Values

CONNPOOL_MAX_LIMIT

public static final String CONNPOOL_MAX_LIMIT

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Constant Field Values

CONNPOOL_INCREMENT

public static final String CONNPOOL_INCREMENT

See Also:

Constant Field Values

CONNPOOL_ACTIVE_SIZE

public static final String CONNPOOL_ACTIVE_SIZE

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Constant Field Values

CONNPOOL_POOL_SIZE

public static final String CONNPOOL_POOL_SIZE

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Constant Field Values

CONNPOOL_TIMEOUT

public static final String CONNPOOL_TIMEOUT

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Constant Field Values

CONNPOOL_NOWAIT

public static final String CONNPOOL_NOWAIT

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Constant Field Values

CONNPOOL_IS_POOLCREATED

public static final String CONNPOOL_IS_POOLCREATED

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Constant Field Values

TRANSACTIONS_DISTRIBUTED

public static final String TRANSACTIONS_DISTRIBUTED

See Also:

Constant Field Values

m_stmtCacheSize

protected int m_stmtCacheSize

m_stmtClearMetaData

protected boolean m_stmtClearMetaData

TRACE

public static final boolean TRACE

See Also:

Constant Field Values

Constructor Detail

OracleOCIConnectionPool

public OracleOCIConnectionPool(String us,
                               String p,
                               String url,
                               Properties info)
                        throws SQLException

Notes: Choose a userid and password that can act as proxy for the users in the getProxyConnection() method.

Parameters:

us - ConnectionPool user-id.

p - ConnectionPool password

url - This would be the full url including the database name. The database name would be the logical name of the pool.

info - Set of properties (optional) for specifying the pool configuration.

Throws:

SQLException

OracleOCIConnectionPool

public OracleOCIConnectionPool(String us,
                               String p,
                               String url)
                        throws SQLException

Deprecated.

Throws:

SQLException

OracleOCIConnectionPool

public OracleOCIConnectionPool()
                        throws SQLException

This will use the user-id, password and connection pool name values set using the methods setUser, setPassword, setConnectionPoolName.

Notes: No useful operations (like getConnection) can be performed on this class unless the methods setUser, setPassword, setConnectionPoolName are invoked. Choose a userid and password that can act as proxy for the users in the getProxyConnection() method.

Throws:

SQLException

Method Detail

getConnection

public Connection getConnection()
                         throws SQLException

Description copied from class: OracleDataSource

Attempt to establish a database connection.

Specified by:

getConnection in interface DataSource

Overrides:

getConnection in class OracleDataSource

Returns:

a Connection to the database

Throws:

SQLException - if a database-access error occurs.

getConnection

public Connection getConnection(String us,
                                String p)
                         throws SQLException

For getting a connection to the database.

Specified by:

getConnection in interface DataSource

Overrides:

getConnection in class OracleDataSource

Parameters:

us - Connection user-id

p - Connection password

Returns:

a Connection to the database

Throws:

SQLException - if a database-access error occurs.

getReference

public Reference getReference()
                       throws NamingException

Inherited from referenceable

Specified by:

getReference in interface Referenceable

Overrides:

getReference in class OracleDataSource

Returns:

Returns a reference to this OracleOCIConnectionPool instance

Throws:

NamingException

getProxyConnection

public oracle.jdbc.internal.OracleConnection getProxyConnection(String proxytype,
                                                                Properties prop)
                                                         throws SQLException

For creating a proxy connection.

Notes: The user and password used to create OracleOCIConnectionPool() must be allowed to act as proxy for user 'us'.

Parameters:

proxytype - Can be one of following types OracleOCIConnectionPool.PROXYCONNECTION_USER_NAME - This will be the normal mode of specifying the user name in proxyUser OracleOCIConnectionPool.PROXYCONNECTION_DISTINGUISHED_NAME - This will specify the distinguished name of the user in proxyUser OracleOCIConnectionPool.PROXYCONNECTION_CERTIFICATE - This will specify the proxy certificate in proxyUser

proxyUser - The user, or certificate, to be proxied against.

roles - Set of roles which this proxy connection can use

Returns:

connection object

Throws:

SQLException

getAliasedConnection

public oracle.jdbc.internal.OracleConnection getAliasedConnection(byte[] conId)
                                                           throws SQLException

For creating aliased sessions.

Notes: Once this call is issued, this connection object can't be used for any operation, as the intent for connection cloning is failover.

Parameters:

conId - - byte[] of the connection id

Throws:

SQLException

close

public void close()
           throws SQLException

This will destroy the connection pool, and close all the connections opened from this data source. Hence all the statement objects created from these connection objects will also be closed.

Overrides:

close in class OracleDataSource

Throws:

SQLException

setPoolConfig

public void setPoolConfig(Properties prop)
                   throws SQLException

(Re-)Set the pool configuration for the Cache. Note: We will not be exposing set for individual settings of the pool's configuration. Users will have to call setPoolConfig with min, max & increment in order for the pool's configuration to be changed.

Parameters:

prop -

Throws:

SQLException

readPoolConfig

public static void readPoolConfig(int minLimit,
                                  int maxLimit,
                                  int increment,
                                  int timeout,
                                  boolean nowait,
                                  boolean transactionsDistributed,
                                  int[] p)

read the properties into an integer array

readPoolConfig

public static void readPoolConfig(Properties info,
                                  int[] p)

getPoolConfig

public Properties getPoolConfig()
                         throws SQLException

Throws:

SQLException

getActiveSize

public int getActiveSize()
                  throws SQLException

Return the number of active or busy connections in the connection pool Note that the count cannot be guaranteed on any invoking subsequent OracleOCIConnectionCacheImpl method. This should be used only as estimate and perhaps for statistical analysis.

Returns:

Throws:

SQLException

getPoolSize

public int getPoolSize()
                throws SQLException

Return the number of physical connections in the connection pool Note that the count cannot be guaranteed on any invoking subsequent OracleOCIConnectionCacheImpl method. This should be used only as estimate and perhaps for statistical analysis.

Returns:

Throws:

SQLException

getTimeout

public int getTimeout()
               throws SQLException

Return the timeout The connections idle for more than this time (seconds) are terminated periodically, to maintain optimum number of open connections.This attribute can be set dynamically. If this attribute is not set, the connections are never timed out.

Returns:

Throws:

SQLException

getNoWait

public String getNoWait()
                 throws SQLException

Return the connection No-wait parameter This attribute determines if retrial for a connection has to be done when all connections in the pool are found to be busy and the number of connections already reached max. If this attribute is set, an error is thrown when all the connections are busy and no more connections can be opened. Otherwise the call waits till it gets a connection.

Returns:

Throws:

SQLException

getMinLimit

public int getMinLimit()
                throws SQLException

Note: There are no individual setMin, setMax and setIncrement since that needs to be done in one call to setPoolConfig Return the minimum limit on the no of Connections.

Returns:

minimum limit on the no of Connections.

Throws:

SQLException

getMaxLimit

public int getMaxLimit()
                throws SQLException

Return the Max limit on Connections.

Returns:

int Max no of Connections that can be opened.

Throws:

SQLException

getConnectionIncrement

public int getConnectionIncrement()
                           throws SQLException

Return the Increment for increasing the connections for the Cache.

Returns:

int Increment

Throws:

SQLException

isDistributedTransEnabled

public boolean isDistributedTransEnabled()

isPoolCreated

public boolean isPoolCreated()

check if the pool has been created. This occurs when <init> is called with user/password or getConnection() has been called

connectionClosed

public void connectionClosed(oracle.jdbc.oci.OracleOCIConnection conn)
                      throws SQLException

Throws:

SQLException

setStmtCacheSize

public void setStmtCacheSize(int size)
                      throws SQLException

Set the statement cache size. Default is 0. You cannot set this for logicalhandles obtained from this pool. 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:

SQLException

setStmtCacheSize

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

Set the statement cache size. Default is 0. You cannot set this for logicalhandles obtained from this pool. 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:

SQLException

getStmtCacheSize

public int getStmtCacheSize()

Return the size of Statement Cache.

Returns:

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

isStmtCacheEnabled

public boolean isStmtCacheEnabled()

Check whether Statement Caching is enabled for this pool or Not.

getConnectionDuringExceptionHandling

protected oracle.jdbc.internal.OracleConnection getConnectionDuringExceptionHandling()

Overrides:

getConnectionDuringExceptionHandling in class OracleDataSource

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