PostgreSQL JDBC Driver 42.7.2 · org.postgresql.ds.PGPoolingDataSource

Field Summary

Modifier and Type	Field and Description
private final Stack<PooledConnection>	available
private final ConnectionEventListener	connectionEventListener Notified when a pooled connection is closed, or a fatal error occurs on a pooled connection.
protected @Nullable String	dataSourceName
protected static ConcurrentMap<String, PGPoolingDataSource>	dataSources
private int	initialConnections
private boolean	initialized
private boolean	isClosed
private final ResourceLock	lock
private final Condition	lockCondition
private int	maxConnections
private @Nullable PGConnectionPoolDataSource	source
private final Stack<PooledConnection>	used

Constructor Summary

Access	Constructor and Description
public	PGPoolingDataSource()

Method Summary

Modifier and Type	Method and Description
protected void	addDataSource(String dataSourceName)
public void	close() Closes this DataSource, and all the pooled connections, whether in use or not.
protected PGConnectionPoolDataSource	Returns: appropriate ConnectionPool to use for this DataSource createConnectionPool() Creates the appropriate ConnectionPool to use for this DataSource.
public Connection	Returns: A pooled connection. getConnection(@Nullable String the database user on whose behalf the connection is being made user, @Nullable String the user's password password) Implements javax.sql.DataSource.getConnection. Gets a non-pooled connection, unless the user and password are the same as the default values for this connection pool.
public Connection	Returns: A pooled connection. getConnection() Overrides org.postgresql.ds.common.BaseDataSource.getConnection. Implements javax.sql.DataSource.getConnection. Gets a connection from the connection pool.
public static @Nullable PGPoolingDataSource	getDataSource(String name) References Deprecated `PGPoolingDataSource` is deprecated or references (maybe indirectly) at least one deprecated element.
public @Nullable String	Returns: name of this DataSource getDataSourceName() Gets the name of this DataSource.
public String	getDescription() Implements abstract org.postgresql.ds.common.BaseDataSource.getDescription. Gets a description of this DataSource.
public int	Returns: number of connections that will be created when this DataSource is initialized getInitialConnections() Gets the number of connections that will be created when this DataSource is initialized.
public int	Returns: The maximum number of pooled connection allowed, or 0 for no maximum. getMaxConnections() Gets the maximum number of connections that the pool will allow.
private Connection	getPooledConnection() Gets a connection from the pool.
public Reference	getReference() Overrides org.postgresql.ds.common.BaseDataSource.getReference. Implements javax.naming.Referenceable.getReference. Adds custom properties for this DataSource to the properties defined in the superclass.
public void	initialize() Initializes this DataSource.
protected boolean	isInitialized()
public boolean	isWrapperFor(Class<?> a Class defining an interface. iface) Implements java.sql.Wrapper.isWrapperFor. Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does.
protected void	removeStoredDataSource()
public void	setDatabaseName(@Nullable String databaseName) Ensures the DataSource properties are not changed after the DataSource has been used.
public void	setDataSourceName(String datasource name dataSourceName) Sets the name of this DataSource.
public void	setInitialConnections(int number of initial connections initialConnections) Sets the number of connections that will be created when this DataSource is initialized.
public void	setMaxConnections(int The maximum number of pooled connection to allow, or 0 for no maximum. maxConnections) Sets the maximum number of connections that the pool will allow.
public void	setPassword(@Nullable String password) Ensures the DataSource properties are not changed after the DataSource has been used.
public void	setPortNumber(int port which the PostgreSQL server is listening on for TCP/IP portNumber) Overrides org.postgresql.ds.common.BaseDataSource.setPortNumber. Ensures the DataSource properties are not changed after the DataSource has been used.
public void	setServerName(String name of the host the PostgreSQL database is running on serverName) Overrides org.postgresql.ds.common.BaseDataSource.setServerName. Ensures the DataSource properties are not changed after the DataSource has been used.
public void	setUser(@Nullable String user) Ensures the DataSource properties are not changed after the DataSource has been used.
public <T> T	unwrap(Class<T> A Class defining an interface that the result must implement. iface) Implements java.sql.Wrapper.unwrap. Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy.

Inherited from org.postgresql.ds.common.BaseDataSource:: createReference getAdaptiveFetch getAdaptiveFetchMaximum getAdaptiveFetchMinimum getAllowEncodingChanges getApplicationName getAssumeMinServerVersion getAuthenticationPluginClassName getAutosave getBinaryTransfer getBinaryTransferDisable getBinaryTransferEnable getCancelSignalTimeout getCleanupSavepoints getConnection getConnectTimeout getCurrentSchema getDatabaseMetadataCacheFields getDatabaseMetadataCacheFieldsMiB getDatabaseName getDefaultRowFetchSize getDisableColumnSanitiser getEscapeSyntaxCallMode getGroupStartupParameters getGssEncMode getGssLib getGssResponseTimeout getHideUnprivilegedObjects getHostRecheckSeconds getJaasApplicationName getJaasLogin getKerberosServerName getLoadBalanceHosts getLocalSocketAddress getLoggerFile getLoggerLevel getLoginTimeout getLogServerErrorDetail getLogUnclosedConnections getLogWriter getMaxResultBuffer getOptions getParentLogger getPassword getPortNumber getPortNumbers getPreferQueryMode getPreparedStatementCacheQueries getPreparedStatementCacheSizeMiB getPrepareThreshold getProperty getProperty getProtocolVersion getQuoteReturningIdentifiers getReadOnly getReadOnlyMode getReceiveBufferSize getRecvBufferSize getReplication getReWriteBatchedInserts getSendBufferSize getServerName getServerNames getSocketFactory getSocketFactoryArg getSocketTimeout getSsl getSslCert getSslcert getSslfactory getSslFactoryArg getSslfactoryarg getSslHostnameVerifier getSslhostnameverifier getSslKey getSslkey getSslMode getSslmode getSslPassword getSslpassword getSslPasswordCallback getSslpasswordcallback getSslResponseTimeout getSslRootCert getSslrootcert getSspiServiceClass getStringType getTargetServerType getTcpKeepAlive getTcpNoDelay getUnknownLength getUrl getURL getUser getUseSpNego getXmlFactoryFactory initializeFrom isAllowEncodingChanges isCleanupSavePoints isColumnSanitiserDisabled isDisableColumnSanitiser isLoadBalanceHosts isLogUnclosedConnections isReadOnly isReWriteBatchedInserts isSsl isTcpKeepAlive readBaseObject setAdaptiveFetch setAdaptiveFetchMaximum setAdaptiveFetchMinimum setAllowEncodingChanges setApplicationName setAssumeMinServerVersion setAuthenticationPluginClassName setAutosave setBinaryTransfer setBinaryTransferDisable setBinaryTransferEnable setCancelSignalTimeout setCleanupSavepoints setCleanupSavePoints setConnectTimeout setCurrentSchema setDatabaseMetadataCacheFields setDatabaseMetadataCacheFieldsMiB setDatabaseName setDefaultRowFetchSize setDisableColumnSanitiser setEscapeSyntaxCallMode setFromReference setGroupStartupParameters setGssEncMode setGssLib setGssResponseTimeout setHideUnprivilegedObjects setHostRecheckSeconds setJaasApplicationName setJaasLogin setKerberosServerName setLoadBalanceHosts setLocalSocketAddress setLoggerFile setLoggerLevel setLoginTimeout setLogServerErrorDetail setLogUnclosedConnections setLogWriter setMaxResultBuffer setOptions setPassword setPortNumbers setPreferQueryMode setPreparedStatementCacheQueries setPreparedStatementCacheSizeMiB setPrepareThreshold setProperty setProperty setProtocolVersion setQuoteReturningIdentifiers setReadOnly setReadOnlyMode setReceiveBufferSize setRecvBufferSize setReplication setReWriteBatchedInserts setSendBufferSize setServerNames setSocketFactory setSocketFactoryArg setSocketTimeout setSsl setSslCert setSslcert setSslfactory setSslFactoryArg setSslfactoryarg setSslHostnameVerifier setSslhostnameverifier setSslKey setSslkey setSslMode setSslmode setSslPassword setSslpassword setSslPasswordCallback setSslpasswordcallback setSslResponseTimeout setSslRootCert setSslrootcert setSspiServiceClass setStringType setTargetServerType setTcpKeepAlive setTcpNoDelay setUnknownLength setUrl setURL setUser setUseSpNego setXmlFactoryFactory writeBaseObject

Field Detail

available	back to summary
private final Stack<PooledConnection> available

connectionEventListener	back to summary
private final ConnectionEventListener connectionEventListener Notified when a pooled connection is closed, or a fatal error occurs on a pooled connection. This is the only way connections are marked as unused.

dataSourceName	back to summary
protected @Nullable String dataSourceName

dataSources	back to summary
protected static ConcurrentMap<String, PGPoolingDataSource> dataSources

initialConnections	back to summary
private int initialConnections

initialized	back to summary
private boolean initialized

isClosed	back to summary
private boolean isClosed

lock	back to summary
private final ResourceLock lock

lockCondition	back to summary
private final Condition lockCondition

maxConnections	back to summary
private int maxConnections

source	back to summary
private @Nullable PGConnectionPoolDataSource source

used	back to summary
private final Stack<PooledConnection> used

Constructor Detail

PGPoolingDataSource	back to summary
public PGPoolingDataSource()

Method Detail

addDataSource	back to summary
protected void addDataSource(String dataSourceName)

close	back to summary
public void close() Closes this DataSource, and all the pooled connections, whether in use or not.

createConnectionPool	back to summary
protected PGConnectionPoolDataSource createConnectionPool() Creates the appropriate ConnectionPool to use for this DataSource. Returns:PGConnectionPoolDataSource appropriate ConnectionPool to use for this DataSource

createConnectionPool

back to summary

protected PGConnectionPoolDataSource createConnectionPool()

Creates the appropriate ConnectionPool to use for this DataSource.

Returns:PGConnectionPoolDataSource: appropriate ConnectionPool to use for this DataSource

getConnection	back to summary
public Connection getConnection(@Nullable String user, @Nullable String password) throws SQLException Implements javax.sql.DataSource.getConnection. Gets a non-pooled connection, unless the user and password are the same as the default values for this connection pool. Parameters user:@Nullable String Doc from javax.sql.DataSource.getConnection. the database user on whose behalf the connection is being made password:@Nullable String Doc from javax.sql.DataSource.getConnection. the user's password Returns:Connection A pooled connection. Annotations @Override Exceptions SQLException: Occurs when no pooled connection is available, and a new physical connection cannot be created.

getConnection

back to summary

public Connection getConnection(@Nullable String user, @Nullable String password) throws SQLException

Implements javax.sql.DataSource.getConnection.

Gets a non-pooled connection, unless the user and password are the same as the default values for this connection pool.

Parameters

user:@Nullable String

Doc from javax.sql.DataSource.getConnection.

the database user on whose behalf the connection is being made

password:@Nullable String

Doc from javax.sql.DataSource.getConnection.

the user's password

Returns:Connection

A pooled connection.

Annotations

@Override

Exceptions

SQLException:: Occurs when no pooled connection is available, and a new physical connection cannot be created.

getConnection	back to summary
public Connection getConnection() throws SQLException Overrides org.postgresql.ds.common.BaseDataSource.getConnection. Implements javax.sql.DataSource.getConnection. Gets a connection from the connection pool. Returns:Connection A pooled connection. Annotations @Override Exceptions SQLException: Occurs when no pooled connection is available, and a new physical connection cannot be created.

getConnection

back to summary

public Connection getConnection() throws SQLException

Overrides org.postgresql.ds.common.BaseDataSource.getConnection.

Implements javax.sql.DataSource.getConnection.

Gets a connection from the connection pool.

Returns:Connection

A pooled connection.

Annotations

@Override

Exceptions

SQLException:: Occurs when no pooled connection is available, and a new physical connection cannot be created.

getDataSource	back to summary
public static @Nullable PGPoolingDataSource getDataSource(String name) References Deprecated `PGPoolingDataSource` is deprecated or references (maybe indirectly) at least one deprecated element. See corresponding docs for further information.

getDataSourceName	back to summary
public @Nullable String getDataSourceName() Gets the name of this DataSource. This uniquely identifies the DataSource. You cannot use more than one DataSource in the same VM with the same name. Returns:@Nullable String name of this DataSource

getDataSourceName

back to summary

public @Nullable String getDataSourceName()

Gets the name of this DataSource. This uniquely identifies the DataSource. You cannot use more than one DataSource in the same VM with the same name.

Returns:@Nullable String: name of this DataSource

getDescription	back to summary
public String getDescription() Implements abstract org.postgresql.ds.common.BaseDataSource.getDescription. Gets a description of this DataSource. Returns:String Doc from org.postgresql.ds.common.BaseDataSource.getDescription. description of this DataSource-ish thing Annotations @Override

getDescription

back to summary

public String getDescription()

Implements abstract org.postgresql.ds.common.BaseDataSource.getDescription.

Gets a description of this DataSource.

Returns:String

Doc from org.postgresql.ds.common.BaseDataSource.getDescription.

description of this DataSource-ish thing

Annotations

@Override

getInitialConnections	back to summary
public int getInitialConnections() Gets the number of connections that will be created when this DataSource is initialized. If you do not call initialize explicitly, it will be initialized the first time a connection is drawn from it. Returns:int number of connections that will be created when this DataSource is initialized

getInitialConnections

back to summary

public int getInitialConnections()

Gets the number of connections that will be created when this DataSource is initialized. If you do not call initialize explicitly, it will be initialized the first time a connection is drawn from it.

Returns:int: number of connections that will be created when this DataSource is initialized

getMaxConnections	back to summary
public int getMaxConnections() Gets the maximum number of connections that the pool will allow. If a request comes in and this many connections are in use, the request will block until a connection is available. Note that connections for a user other than the default user will not be pooled and don't count against this limit. Returns:int The maximum number of pooled connection allowed, or 0 for no maximum.

getMaxConnections

back to summary

public int getMaxConnections()

Gets the maximum number of connections that the pool will allow. If a request comes in and this many connections are in use, the request will block until a connection is available. Note that connections for a user other than the default user will not be pooled and don't count against this limit.

Returns:int: The maximum number of pooled connection allowed, or 0 for no maximum.

getPooledConnection	back to summary
private Connection getPooledConnection() throws SQLException Gets a connection from the pool. Will get an available one if present, or create a new one if under the max limit. Will block if all used and a new one would exceed the max.

getReference	back to summary
public Reference getReference() throws NamingException Overrides org.postgresql.ds.common.BaseDataSource.getReference. Implements javax.naming.Referenceable.getReference. Adds custom properties for this DataSource to the properties defined in the superclass. Returns:Reference Doc from javax.naming.Referenceable.getReference. The non-null Reference of this object. Annotations @Override Exceptions NamingException: Doc from javax.naming.Referenceable.getReference. If a naming exception was encountered while retrieving the reference.

getReference

back to summary

public Reference getReference() throws NamingException

Overrides org.postgresql.ds.common.BaseDataSource.getReference.

Implements javax.naming.Referenceable.getReference.

Adds custom properties for this DataSource to the properties defined in the superclass.

Returns:Reference

Doc from javax.naming.Referenceable.getReference.

The non-null Reference of this object.

Annotations

@Override

Exceptions

NamingException:

Doc from javax.naming.Referenceable.getReference.

If a naming exception was encountered while retrieving the reference.

initialize	back to summary
public void initialize() throws SQLException Initializes this DataSource. If the initialConnections is greater than zero, that number of connections will be created. After this method is called, the DataSource properties cannot be changed. If you do not call this explicitly, it will be called the first time you get a connection from the DataSource. Exceptions SQLException: Occurs when the initialConnections is greater than zero, but the DataSource is not able to create enough physical connections.

initialize

back to summary

public void initialize() throws SQLException

Initializes this DataSource. If the initialConnections is greater than zero, that number of connections will be created. After this method is called, the DataSource properties cannot be changed. If you do not call this explicitly, it will be called the first time you get a connection from the DataSource.

Exceptions

SQLException:: Occurs when the initialConnections is greater than zero, but the DataSource is not able to create enough physical connections.

isInitialized	back to summary
protected boolean isInitialized()

isWrapperFor back to summary

isWrapperFor	back to summary
public boolean isWrapperFor(Class<?> iface) throws SQLException Implements java.sql.Wrapper.isWrapperFor. Doc from java.sql.Wrapper.isWrapperFor. Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does. Returns false otherwise. If this implements the interface then return true, else if this is a wrapper then return the result of recursively calling `isWrapperFor` on the wrapped object. If this does not implement the interface and is not a wrapper, return false. This method should be implemented as a low-cost operation compared to `unwrap` so that callers can use this method to avoid expensive `unwrap` calls that may fail. If this method returns true then calling `unwrap` with the same argument should succeed. Parameters iface:Class<?> a Class defining an interface. Returns:boolean true if this implements the interface or directly or indirectly wraps an object that does. Annotations @Override Exceptions SQLException: if an error occurs while determining whether this is a wrapper for an object with the given interface.

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

Implements java.sql.Wrapper.isWrapperFor.

Doc from java.sql.Wrapper.isWrapperFor.

Returns true if this either implements the interface argument or is directly or indirectly a wrapper for an object that does. Returns false otherwise. If this implements the interface then return true, else if this is a wrapper then return the result of recursively calling isWrapperFor on the wrapped object. If this does not implement the interface and is not a wrapper, return false. This method should be implemented as a low-cost operation compared to unwrap so that callers can use this method to avoid expensive unwrap calls that may fail. If this method returns true then calling unwrap with the same argument should succeed.

Parameters

iface:Class<?>: a Class defining an interface.

Returns:boolean

true if this implements the interface or directly or indirectly wraps an object that does.

Annotations

@Override

Exceptions

SQLException:: if an error occurs while determining whether this is a wrapper for an object with the given interface.

removeStoredDataSource	back to summary
protected void removeStoredDataSource()

setDatabaseName	back to summary
public void setDatabaseName(@Nullable String databaseName) Ensures the DataSource properties are not changed after the DataSource has been used. Annotations @Override Exceptions IllegalStateException: The Database Name cannot be changed after the DataSource has been used.

setDatabaseName

back to summary

public void setDatabaseName(@Nullable String databaseName)

Ensures the DataSource properties are not changed after the DataSource has been used.

Annotations

@Override

Exceptions

IllegalStateException:: The Database Name cannot be changed after the DataSource has been used.

setDataSourceName	back to summary
public void setDataSourceName(String dataSourceName) Sets the name of this DataSource. This is required, and uniquely identifies the DataSource. You cannot create or use more than one DataSource in the same VM with the same name. Parameters dataSourceName:String datasource name Exceptions IllegalStateException: The Data Source Name cannot be changed after the DataSource has been used. IllegalArgumentException: Another PoolingDataSource with the same dataSourceName already exists.

setDataSourceName

back to summary

public void setDataSourceName(String dataSourceName)

Sets the name of this DataSource. This is required, and uniquely identifies the DataSource. You cannot create or use more than one DataSource in the same VM with the same name.

Parameters

dataSourceName:String: datasource name

Exceptions

IllegalStateException:: The Data Source Name cannot be changed after the DataSource has been used.
IllegalArgumentException:: Another PoolingDataSource with the same dataSourceName already exists.

setInitialConnections	back to summary
public void setInitialConnections(int initialConnections) Sets the number of connections that will be created when this DataSource is initialized. If you do not call initialize explicitly, it will be initialized the first time a connection is drawn from it. Parameters initialConnections:int number of initial connections Exceptions IllegalStateException: The Initial Connections cannot be changed after the DataSource has been used.

setInitialConnections

back to summary

public void setInitialConnections(int initialConnections)

Sets the number of connections that will be created when this DataSource is initialized. If you do not call initialize explicitly, it will be initialized the first time a connection is drawn from it.

Parameters

initialConnections:int: number of initial connections

Exceptions

IllegalStateException:: The Initial Connections cannot be changed after the DataSource has been used.

setMaxConnections	back to summary
public void setMaxConnections(int maxConnections) Sets the maximum number of connections that the pool will allow. If a request comes in and this many connections are in use, the request will block until a connection is available. Note that connections for a user other than the default user will not be pooled and don't count against this limit. Parameters maxConnections:int The maximum number of pooled connection to allow, or 0 for no maximum. Exceptions IllegalStateException: The Maximum Connections cannot be changed after the DataSource has been used.

setMaxConnections

back to summary

public void setMaxConnections(int maxConnections)

Sets the maximum number of connections that the pool will allow. If a request comes in and this many connections are in use, the request will block until a connection is available. Note that connections for a user other than the default user will not be pooled and don't count against this limit.

Parameters

maxConnections:int: The maximum number of pooled connection to allow, or 0 for no maximum.

Exceptions

IllegalStateException:: The Maximum Connections cannot be changed after the DataSource has been used.

setPassword	back to summary
public void setPassword(@Nullable String password) Ensures the DataSource properties are not changed after the DataSource has been used. Annotations @Override Exceptions IllegalStateException: The Password cannot be changed after the DataSource has been used.

setPassword

back to summary

public void setPassword(@Nullable String password)

Ensures the DataSource properties are not changed after the DataSource has been used.

Annotations

@Override

Exceptions

IllegalStateException:: The Password cannot be changed after the DataSource has been used.

setPortNumber	back to summary
public void setPortNumber(int portNumber) Overrides org.postgresql.ds.common.BaseDataSource.setPortNumber. Ensures the DataSource properties are not changed after the DataSource has been used. Parameters portNumber:int Doc from org.postgresql.ds.common.BaseDataSource.setPortNumber. port which the PostgreSQL server is listening on for TCP/IP Annotations @Override Exceptions IllegalStateException: The Port Number cannot be changed after the DataSource has been used.

setPortNumber

back to summary

public void setPortNumber(int portNumber)

Overrides org.postgresql.ds.common.BaseDataSource.setPortNumber.

Ensures the DataSource properties are not changed after the DataSource has been used.

Parameters

portNumber:int

Doc from org.postgresql.ds.common.BaseDataSource.setPortNumber.

port which the PostgreSQL server is listening on for TCP/IP

Annotations

@Override

Exceptions

IllegalStateException:: The Port Number cannot be changed after the DataSource has been used.

setServerName	back to summary
public void setServerName(String serverName) Overrides org.postgresql.ds.common.BaseDataSource.setServerName. Ensures the DataSource properties are not changed after the DataSource has been used. Parameters serverName:String Doc from org.postgresql.ds.common.BaseDataSource.setServerName. name of the host the PostgreSQL database is running on Annotations @Override Exceptions IllegalStateException: The Server Name cannot be changed after the DataSource has been used.

setServerName

back to summary

public void setServerName(String serverName)

Overrides org.postgresql.ds.common.BaseDataSource.setServerName.

Ensures the DataSource properties are not changed after the DataSource has been used.

Parameters

serverName:String

Doc from org.postgresql.ds.common.BaseDataSource.setServerName.

name of the host the PostgreSQL database is running on

Annotations

@Override

Exceptions

IllegalStateException:: The Server Name cannot be changed after the DataSource has been used.

setUser	back to summary
public void setUser(@Nullable String user) Ensures the DataSource properties are not changed after the DataSource has been used. Annotations @Override Exceptions IllegalStateException: The User cannot be changed after the DataSource has been used.

setUser

back to summary

public void setUser(@Nullable String user)

Ensures the DataSource properties are not changed after the DataSource has been used.

Annotations

@Override

Exceptions

IllegalStateException:: The User cannot be changed after the DataSource has been used.

unwrap back to summary

unwrap	back to summary
public <T> T unwrap(Class<T> iface) throws SQLException Implements java.sql.Wrapper.unwrap. Doc from java.sql.Wrapper.unwrap. Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy. If the receiver implements the interface then the result is the receiver or a proxy for the receiver. If the receiver is a wrapper and the wrapped object implements the interface then the result is the wrapped object or a proxy for the wrapped object. Otherwise return the the result of calling `unwrap` recursively on the wrapped object or a proxy for that result. If the receiver is not a wrapper and does not implement the interface, then an `SQLException` is thrown. Parameters <T> the type of the class modeled by this Class object iface:Class<T> A Class defining an interface that the result must implement. Returns:T an object that implements the interface. May be a proxy for the actual implementing object. Annotations @Override Exceptions SQLException: If no object found that implements the interface

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

Implements java.sql.Wrapper.unwrap.

Doc from java.sql.Wrapper.unwrap.

Returns an object that implements the given interface to allow access to non-standard methods, or standard methods not exposed by the proxy. If the receiver implements the interface then the result is the receiver or a proxy for the receiver. If the receiver is a wrapper and the wrapped object implements the interface then the result is the wrapped object or a proxy for the wrapped object. Otherwise return the the result of calling unwrap recursively on the wrapped object or a proxy for that result. If the receiver is not a wrapper and does not implement the interface, then an SQLException is thrown.

Parameters

<T>: the type of the class modeled by this Class object
iface:Class<T>: A Class defining an interface that the result must implement.

Returns:T

an object that implements the interface. May be a proxy for the actual implementing object.

Annotations

@Override

Exceptions

SQLException:: If no object found that implements the interface

public Class PGPoolingDataSource

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail