Package scriptella.driver.velocity

Class VelocityConnection

java.lang.Object

scriptella.spi.AbstractConnection

scriptella.driver.text.AbstractTextConnection

scriptella.driver.velocity.VelocityConnection

All Implemented Interfaces:

Connection

public class VelocityConnection
extends AbstractTextConnection

Represents a session to velocity engine.

Nested Class Summary

Nested classes/interfaces inherited from class scriptella.spi.AbstractConnection

AbstractConnection.StatementCounter

Field Summary

Fields inherited from class scriptella.driver.text.AbstractTextConnection

ENCODING, EOL, FLUSH, FORMAT_PREFIX, NULL_STRING, SKIP_LINES, TRIM

Fields inherited from class scriptella.spi.AbstractConnection

counter

Constructor Summary

Constructors

Constructor	Description
VelocityConnection(ConnectionParameters parameters)	Instantiates a velocity connection.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes the connection and releases all related resources.
void	executeQuery(Resource queryContent, ParametersCallback parametersCallback, QueryCallback queryCallback)	Executes a query specified by its content.
void	executeScript(Resource scriptContent, ParametersCallback parametersCallback)	Executes a script specified by its content.

Methods inherited from class scriptella.driver.text.AbstractTextConnection

getConnectionParameters, newInputReader, newOutputWriter

Methods inherited from class scriptella.spi.AbstractConnection

commit, getDialectIdentifier, getExecutedStatementsCount, isReadonly, rollback, setDialectIdentifier, toString

Methods inherited from class java.lang.Object

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

Constructor Details

VelocityConnection

public VelocityConnection(ConnectionParameters parameters)

Instantiates a velocity connection.

Parameters:

parameters - connection parameters.

Method Details

executeScript

public void executeScript(Resource scriptContent,
 ParametersCallback parametersCallback)
                   throws ProviderException

Executes a script specified by its content.

scriptContent may be used as a key for caching purposes, i.e. provider may precompile scripts and use compiled versions for subsequent executions.

This method is synchronized to to prevent multiple threads from working with the same writer. Additionally single velocityEngine and context adapter instances are used.

Parameters:

scriptContent - script content.

parametersCallback - callback to get parameter values.

Throws:

ProviderException - if script execution failed.

executeQuery

public void executeQuery(Resource queryContent,
 ParametersCallback parametersCallback,
 QueryCallback queryCallback)
                  throws ProviderException

Executes a query specified by its content.

Parameters:

queryContent - query content.

parametersCallback - callback to get parameter values.

queryCallback - callback to call for each result set element produced by this query.

Throws:

ProviderException - if query execution failed.

See Also:

• executeScript(scriptella.spi.Resource,scriptella.spi.ParametersCallback)

close

public void close()
           throws ProviderException

Closes the connection and releases all related resources.

Throws:

ProviderException - if a critical failure occured.