org.apache.flink.runtime.broadcast

类 BroadcastVariableMaterialization<T,C>

java.lang.Object

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

类型参数:

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.

构造器概要

构造器

构造器和说明
BroadcastVariableMaterialization(BroadcastVariableKey key)

方法概要

限定符和类型	方法和说明
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)

从类继承的方法 java.lang.Object

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

构造器详细资料

BroadcastVariableMaterialization

public BroadcastVariableMaterialization(BroadcastVariableKey key)

方法详细资料

materializeVariable

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

抛出:

MaterializationExpiredException

IOException

decrementReference

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

decrementReferenceIfHeld

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

getVariable

public List<T> getVariable()
                    throws InitializationTypeConflictException

抛出:

InitializationTypeConflictException

getVariable

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