Package org.apache.flink.util

Class OutputTag<T>

java.lang.Object

org.apache.flink.util.OutputTag<T>

Type Parameters:

T - the type of elements in the side-output stream.

All Implemented Interfaces:

Serializable

@PublicEvolving
public class OutputTag<T>
extends Object
implements Serializable

An OutputTag is a typed and named tag to use for tagging side outputs of an operator.

An OutputTag must always be an anonymous inner class so that Flink can derive a TypeInformation for the generic type parameter.

Example:

 OutputTag<Tuple2<String, Long>> info = new OutputTag<Tuple2<String, Long>>("late-data"){};
 

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor	Description
OutputTag(String id)	Creates a new named OutputTag with the given id.
OutputTag(String id, TypeInformation<T> typeInfo)	Creates a new named OutputTag with the given id and output TypeInformation.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
String	getId()
TypeInformation<T>	getTypeInfo()
int	hashCode()
static boolean	isResponsibleFor(OutputTag<?> owner, OutputTag<?> other)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OutputTag

public OutputTag(String id)

Creates a new named OutputTag with the given id.

Parameters:

id - The id of the created OutputTag.

OutputTag

public OutputTag(String id,
                 TypeInformation<T> typeInfo)

Creates a new named OutputTag with the given id and output TypeInformation.

Parameters:

id - The id of the created OutputTag.

typeInfo - The TypeInformation for the side output.

Method Detail

isResponsibleFor

public static boolean isResponsibleFor(@Nullable
                                       OutputTag<?> owner,
                                       @Nonnull
                                       OutputTag<?> other)

getId

public String getId()

getTypeInfo

public TypeInformation<T> getTypeInfo()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object