Package javax.xml.xquery

Interface ConnectionPoolXQDataSource

public interface ConnectionPoolXQDataSource

A factory for PooledXQConnection objects. An object that implements this interface will typically be registered with a JNDI based naming service.

Method Summary

Modifier and Type	Method	Description
int	getLoginTimeout()	Gets the maximum time in seconds that this datasource can wait while attempting to connect to a database.
java.io.PrintWriter	getLogWriter()	Retrieves the log writer for this datasource object.
PooledXQConnection	getPooledConnection()	Attempts to establish a physical connection to an XML datasource that can be used as a pooled connection.
PooledXQConnection	getPooledConnection(java.lang.String user, java.lang.String password)	Attempts to establish a physical connection to an XML datasource using the supplied username and password, that can be used as a pooled connection.
java.lang.String	getProperty(java.lang.String name)	Returns the current value of the named property if set, else null.
java.lang.String[]	getSupportedPropertyNames()	Returns an array containing the property names supported by this datasource.
void	setLoginTimeout(int seconds)	Sets the maximum time in seconds that this datasource will wait while attempting to connect to a database.
void	setLogWriter(java.io.PrintWriter out)	Sets the log writer for this datasource object to the given java.io.PrintWriter object.
void	setProperties(java.util.Properties props)	Sets the data source properties from the specified Properties instance.
void	setProperty(java.lang.String name, java.lang.String value)	Sets the named property to the specified value.

Method Detail

getPooledConnection

PooledXQConnection getPooledConnection()
                                throws XQException

Attempts to establish a physical connection to an XML datasource that can be used as a pooled connection.

Returns:

a PooledXQConnection object that is a physical connection to the XML datasource that this ConnectionPoolXQDataSource object represents

Throws:

XQException - if a datasource access error occurs

getPooledConnection

PooledXQConnection getPooledConnection(java.lang.String user,
                                       java.lang.String password)
                                throws XQException

Attempts to establish a physical connection to an XML datasource using the supplied username and password, that can be used as a pooled connection.

Parameters:

user - the user on whose behalf the connection is being made

password - the user's password

Returns:

a PooledXQConnection object that is a physical connection to the XML datasource that this ConnectionPoolXQDataSource object represents

Throws:

XQException - if a datasource access error occurs

getLoginTimeout

int getLoginTimeout()
             throws XQException

Gets the maximum time in seconds that this datasource can wait while attempting to connect to a database. A value of zero means that the timeout is the default system timeout if there is one; otherwise, it means that there is no timeout. When a datasource object is created, the login timeout is initially zero. It is implementation-defined whether the returned login timeout is actually used by the data source implementation.

Returns:

the datasource login time limit

Throws:

XQException - if a datasource access error occurs

getLogWriter

java.io.PrintWriter getLogWriter()
                          throws XQException

Retrieves the log writer for this datasource object. The log writer is a character output stream to which all logging and tracing messages for this datasource will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. When a datasource object is created, the log writer is initially null; in other words, the default is for logging to be disabled.

Returns:

the log writer for this datasource or null if logging is disabled

Throws:

XQException - if a datasource access error occurs

getSupportedPropertyNames

java.lang.String[] getSupportedPropertyNames()

Returns an array containing the property names supported by this datasource.

Returns:

String[] an array of property names supported by this implementation

setProperty

void setProperty(java.lang.String name,
                 java.lang.String value)
          throws XQException

Sets the named property to the specified value. If a property with the same name was already set, then this method will override the old value for that property with the new value.

If the implementation does not support the given property or if it can determine that the value given for this property is invalid, then an exception is thrown. If an exception is thrown, then no previous value is overwritten.

Parameters:

name - the name of the property to set

value - the value of the named property

Throws:

XQException - if (1) the given property is not recognized, or (2) the value for the given property is determined to be invalid

getProperty

java.lang.String getProperty(java.lang.String name)
                      throws XQException

Returns the current value of the named property if set, else null. If the implementation does not support the given property then an exception is raised.

Parameters:

name - the name of the property whose value is needed

Returns:

String representing the value of the required property if set, else null

Throws:

XQException - if a given property is not supported

setProperties

void setProperties(java.util.Properties props)
            throws XQException

Sets the data source properties from the specified Properties instance. Properties set before this call will still apply but those with the same name as any of these properties will be replaced. Properties set after this call also apply and may replace properties set during this call.

If the implementation does not support one or more of the given property names, or if it can determine that the value given for a specific property is invalid, then an exception is thrown. If an exception is thrown, then no previous value is overwritten. is invalid, then an exception is raised.

Parameters:

props - the list of properties to set

Throws:

XQException - if (1) a given property is not recognized, or (2) the value for a given property is determined to be invalid

setLoginTimeout

void setLoginTimeout(int seconds)
              throws XQException

Sets the maximum time in seconds that this datasource will wait while attempting to connect to a database. A value of zero specifies that the timeout is the default system timeout if there is one; otherwise, it specifies that there is no timeout. When a datasource object is created, the login timeout is initially zero. It is implementation-defined whether the specified login timeout is actually used by the data source implementation.

Parameters:

seconds - the datasource login time limit

Throws:

XQException - if a datasource access error occurs

setLogWriter

void setLogWriter(java.io.PrintWriter out)
           throws XQException

Sets the log writer for this datasource object to the given java.io.PrintWriter object. The log writer is a character output stream to which all logging and tracing messages for this datasource will be printed. This includes messages printed by the methods of this object, messages printed by methods of other objects manufactured by this object, and so on. When a datasource object is created the log writer is initially null; in other words, the default is for logging to be disabled.

Parameters:

out - the new log writer; to disable logging, set to null

Throws:

XQException - if a datasource access error occurs