org.teiid

Interface CommandContext

All Known Implementing Classes:

CommandContext

public interface CommandContext

Context information for the currently executing command. Can be used as an argument to UDFs.

Method Summary

Modifier and Type	Method and Description
void	addListener(CommandListener listener) Add a listener for command events
void	addWarning(Exception ex) Add an exception as a warning.
Map<String,DataPolicy>	getAllowedDataPolicies() Get the user's data policies, never null
Serializable	getCommandPayload() Get the current command payload
TeiidConnection	getConnection() Gets a connection to the current session.
String	getConnectionId() Get the connection id
String	getConnectionID() Deprecated. see getConnectionId()
GeneratedKeys	getGeneratedKeys() Returns the last set of generated keys or null if no keys have been generated.
double	getNextRand() Get the next random double value
double	getNextRand(long seed) Sets the seed value and returns the next random double value.
int	getProcessorBatchSize() Get the processor batch size set on the BufferManager
String	getRequestId() Get the current request id
long	getReuseCount() Get the number of times this command has been reused.
TimeZone	getServerTimeZone() Get the server TimeZone
Session	getSession() Get the current session
Object	getSessionVariable(String key) Get the session variable
Subject	getSubject() Get the current subject
String	getUserName() Get the current user name, which will just be the base user name and not include the security domain.
VDB	getVdb() Get the current vdb
ClassLoader	getVDBClassLoader() Get class loader for VDB.
String	getVdbName() Get the current vdb name
String	getVdbVersion() Get the current vdb version
boolean	isContinuous()
boolean	isReturnAutoGeneratedKeys() Whether to return the keys generated by an insert.
void	removeListener(CommandListener listener) Add a listener for command events
GeneratedKeys	returnGeneratedKeys(String[] columnNames, Class<?>[] columnDataTypes) Creates a holder for generated keys.
Object	setSessionVariable(String key, Object value) Set the session variable and return the old value if any

Method Detail

getUserName

String getUserName()

Get the current user name, which will just be the base user name and not include the security domain. See also getSession() - Session.getSecurityDomain()

Returns:

getVdbName

String getVdbName()

Get the current vdb name

Returns:

getVdbVersion

String getVdbVersion()

Get the current vdb version

Returns:

getConnectionId

String getConnectionId()

Get the connection id

Returns:

getConnectionID

String getConnectionID()

Deprecated. see getConnectionId()

Get the connection id

Returns:

getNextRand

double getNextRand()

Get the next random double value

Returns:

getNextRand

double getNextRand(long seed)

Sets the seed value and returns the next random double value. Additional calls to getNextRand() will be based upon the seed value.

Parameters:

seed -

Returns:

getProcessorBatchSize

int getProcessorBatchSize()

Get the processor batch size set on the BufferManager

Returns:

- the nominal batch size target. actual batch sizes will vary based upon the column types

getServerTimeZone

TimeZone getServerTimeZone()

Get the server TimeZone

Returns:

getSubject

Subject getSubject()

Get the current subject

Returns:

getSession

Session getSession()

Get the current session

Returns:

getCommandPayload

Serializable getCommandPayload()

Get the current command payload

Returns:

may be null if the client did not set a payload

getRequestId

String getRequestId()

Get the current request id

Returns:

getAllowedDataPolicies

Map<String,DataPolicy> getAllowedDataPolicies()

Get the user's data policies, never null

Returns:

getVdb

VDB getVdb()

Get the current vdb

Returns:

addListener

void addListener(CommandListener listener)

Add a listener for command events

Parameters:

listener -

removeListener

void removeListener(CommandListener listener)

Add a listener for command events

Parameters:

listener -

getReuseCount

long getReuseCount()

Get the number of times this command has been reused. Useful in continuous executions.

Returns:

See Also:

isContinuous()

getVDBClassLoader

ClassLoader getVDBClassLoader()

Get class loader for VDB.

Returns:

addWarning

void addWarning(Exception ex)

Add an exception as a warning. The exception will be wrapped by a TeiidSQLWarning for the client. The warnings can be consumed through the Statement.getWarnings() method.

Parameters:

ex -

isContinuous

boolean isContinuous()

Returns:

true if this is a continuous query

isReturnAutoGeneratedKeys

boolean isReturnAutoGeneratedKeys()

Whether to return the keys generated by an insert.

Returns:

returnGeneratedKeys

GeneratedKeys returnGeneratedKeys(String[] columnNames,
                                  Class<?>[] columnDataTypes)

Creates a holder for generated keys.

Parameters:

columnNames -

columnDataTypes -

Returns:

getGeneratedKeys

GeneratedKeys getGeneratedKeys()

Returns the last set of generated keys or null if no keys have been generated.

setSessionVariable

Object setSessionVariable(String key,
                          Object value)

Set the session variable and return the old value if any

Parameters:

key -

value -

Returns:

getSessionVariable

Object getSessionVariable(String key)

Get the session variable

Parameters:

key -

Returns:

getConnection

TeiidConnection getConnection()
                       throws TeiidSQLException

Gets a connection to the current session.
WARNING be careful with blocking/recursive operations.
The returned connection is considered to be derived and is not allowed to alter the transaction state or close the session.
Each call to this method will return a new connection.
Client side execution/connection properties are specific to each connection instance

Returns:

a Connection to the current session

Throws:

TeiidSQLException