Package org.apache.flink.runtime.asyncprocessing.declare

Class DeclarationContext

java.lang.Object

org.apache.flink.runtime.asyncprocessing.declare.DeclarationContext

public class DeclarationContext
extends Object

A context to declare parts of process in user-defined function/operator.

Constructor Summary

Constructors

Constructor	Description
DeclarationContext(DeclarationManager manager)

Method Summary

Modifier and Type	Method	Description
<T, U, V> NamedBiFunction<T,U,V>	declare(String name, org.apache.flink.util.function.BiFunctionWithException<T,U,V,? extends Exception> callback)	Declare a callback with a name.
<T, V> NamedFunction<T,V>	declare(String name, org.apache.flink.util.function.FunctionWithException<T,V,? extends Exception> callback)	Declare a callback with a name.
<T> NamedConsumer<T>	declare(String name, org.apache.flink.util.function.ThrowingConsumer<T,? extends Exception> callback)	Declare a callback with a name.
<T, U, V> NamedBiFunction<T,U,V>	declare(org.apache.flink.util.function.BiFunctionWithException<T,U,V,? extends Exception> callback)	Declare a callback with an automatically assigned name.
<T, V> NamedFunction<T,V>	declare(org.apache.flink.util.function.FunctionWithException<T,V,? extends Exception> callback)	Declare a callback with an automatically assigned name.
<T> NamedConsumer<T>	declare(org.apache.flink.util.function.ThrowingConsumer<T,? extends Exception> callback)	Declare a callback with an automatically assigned name.
<IN> DeclarationChain<IN>.DeclarationStage<IN>	declareChain()	Declaring a processing in chain-style.
<T> ContextVariable<T>	declareVariable(Supplier<T> initializer)	Declare a variable that will keep value across callback with same context.
<T> DeclaredVariable<T>	declareVariable(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer, String name, Supplier<T> initialValue)	Declare a variable that will keep value across callback with same context.

Methods inherited from class java.lang.Object

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

Constructor Details

DeclarationContext

public DeclarationContext(DeclarationManager manager)

Method Details

declare

public <T> NamedConsumer<T> declare(String name,
 org.apache.flink.util.function.ThrowingConsumer<T,? extends Exception> callback)
                             throws DeclarationException

Declare a callback with a name.

Throws:

DeclarationException

declare

public <T,
V> NamedFunction<T,V> declare(String name,
 org.apache.flink.util.function.FunctionWithException<T,V,? extends Exception> callback)
                                 throws DeclarationException

Declare a callback with a name.

Throws:

DeclarationException

declare

public <T,
U,
V> NamedBiFunction<T,U,V> declare(String name,
 org.apache.flink.util.function.BiFunctionWithException<T,U,V,? extends Exception> callback)
                                       throws DeclarationException

Declare a callback with a name.

Throws:

DeclarationException

declare

public <T> NamedConsumer<T> declare(org.apache.flink.util.function.ThrowingConsumer<T,? extends Exception> callback)
                             throws DeclarationException

Declare a callback with an automatically assigned name.

Throws:

DeclarationException

declare

public <T,
V> NamedFunction<T,V> declare(org.apache.flink.util.function.FunctionWithException<T,V,? extends Exception> callback)
                                 throws DeclarationException

Declare a callback with an automatically assigned name.

Throws:

DeclarationException

declare

public <T,
U,
V> NamedBiFunction<T,U,V> declare(org.apache.flink.util.function.BiFunctionWithException<T,U,V,? extends Exception> callback)
                                       throws DeclarationException

Declare a callback with an automatically assigned name.

Throws:

DeclarationException

declareVariable

public <T> DeclaredVariable<T> declareVariable(org.apache.flink.api.common.typeutils.TypeSerializer<T> serializer,
 String name,
 @Nullable
 Supplier<T> initialValue)
                                        throws DeclarationException

Declare a variable that will keep value across callback with same context.

Type Parameters:

T - The type of value.

Parameters:

serializer - the serializer of variable.

name - the name.

initialValue - the initializer of variable. Can be null if no need to initialize.

Throws:

DeclarationException

declareVariable

public <T> ContextVariable<T> declareVariable(@Nullable
 Supplier<T> initializer)
                                       throws DeclarationException

Declare a variable that will keep value across callback with same context. This value cannot be serialized into checkpoint.

Type Parameters:

T - The type of value.

Parameters:

initializer - the initializer of variable. Can be null if no need to initialize.

Throws:

DeclarationException

declareChain

public <IN>
DeclarationChain<IN>.DeclarationStage<IN> declareChain()
                                                throws DeclarationException

Declaring a processing in chain-style. This method start a chain with an input type.

Type Parameters:

IN - the in type of the first block.

Returns:

the chain itself.

Throws:

DeclarationException