Package org.apache.flink.runtime.broadcast

Class BroadcastVariableMaterialization<T,C>

java.lang.Object

org.apache.flink.runtime.broadcast.BroadcastVariableMaterialization<T,C>

Type Parameters:

T - The type of the elements in the broadcast data set.

public class BroadcastVariableMaterialization<T,C>
extends Object

This class represents a single materialization of a broadcast variable and maintains a reference count for it. If the reference count reaches zero the variable is no longer accessible and will eventually be garbage-collected.

Constructor Summary

Constructors

Constructor	Description
BroadcastVariableMaterialization(BroadcastVariableKey key)

Method Summary

Modifier and Type	Method	Description
boolean	decrementReference(BatchTask<?,?> referenceHolder)
boolean	decrementReferenceIfHeld(BatchTask<?,?> referenceHolder)
List<T>	getVariable()
C	getVariable(org.apache.flink.api.common.functions.BroadcastVariableInitializer<T,C> initializer)
void	materializeVariable(MutableReader<?> reader, org.apache.flink.api.common.typeutils.TypeSerializerFactory<?> serializerFactory, BatchTask<?,?> referenceHolder)

Methods inherited from class java.lang.Object

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

Constructor Detail

BroadcastVariableMaterialization

public BroadcastVariableMaterialization(BroadcastVariableKey key)

Method Detail

materializeVariable

public void materializeVariable(MutableReader<?> reader,
                                org.apache.flink.api.common.typeutils.TypeSerializerFactory<?> serializerFactory,
                                BatchTask<?,?> referenceHolder)
                         throws MaterializationExpiredException,
                                IOException

Throws:

MaterializationExpiredException

IOException

decrementReference

public boolean decrementReference(BatchTask<?,?> referenceHolder)

decrementReferenceIfHeld

public boolean decrementReferenceIfHeld(BatchTask<?,?> referenceHolder)

getVariable

public List<T> getVariable()
                    throws InitializationTypeConflictException

Throws:

InitializationTypeConflictException

getVariable

public C getVariable(org.apache.flink.api.common.functions.BroadcastVariableInitializer<T,C> initializer)