io.cdap.directives.aggregates

Class SetTransientVariable

java.lang.Object

io.cdap.directives.aggregates.SetTransientVariable

All Implemented Interfaces:

Directive, Executor<List<Row>,List<Row>>, Serializable

@Categories(categories="transient")
public class SetTransientVariable
extends Object
implements Directive

A directive that defines a transient variable who's life-expectancy is only within the record. The value set as transient variable is available to all the directives after that. But, it's not available beyond the input record.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME

Fields inherited from interface io.cdap.wrangler.api.Directive

TYPE

Constructor Summary

Constructors

Constructor and Description
SetTransientVariable()

Method Summary

Modifier and Type	Method and Description
UsageDefinition	define()
void	destroy()
List<Row>	execute(List<Row> rows, ExecutorContext context)
void	initialize(Arguments args)

Methods inherited from class java.lang.Object

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

Field Detail

NAME

public static final String NAME

See Also:

Constant Field Values

Constructor Detail

SetTransientVariable

public SetTransientVariable()

Method Detail

define

public UsageDefinition define()

Specified by:

define in interface Directive

initialize

public void initialize(Arguments args)
                throws DirectiveParseException

Specified by:

initialize in interface Executor<List<Row>,List<Row>>

Throws:

DirectiveParseException

destroy

public void destroy()

Specified by:

destroy in interface Executor<List<Row>,List<Row>>

execute

public List<Row> execute(List<Row> rows,
                         ExecutorContext context)
                  throws DirectiveExecutionException

Specified by:

execute in interface Executor<List<Row>,List<Row>>

Throws:

DirectiveExecutionException