ValueProvider (Google Cloud Dataflow SDK 1.9.1 API)

Google Cloud Dataflow SDK for Java, version 1.9.1

Warning: Dataflow SDK 1.x for Java is unsupported as of October 16, 2018. After August 12, 2020, you can use unsupported SDKs temporarily while you upgrade your pipelines. For more information, see Using an unsupported SDK.

For information on migrating from the 1.x SDK, see Migrating from Dataflow SDK 1.x for Java.

Note: If you are using Cloud Dataflow SDK version 2.x, see the Apache Beam API reference documentation.

com.google.cloud.dataflow.sdk.options

Interface ValueProvider<T>

• All Superinterfaces:

  Serializable

  All Known Implementing Classes:

  ValueProvider.NestedValueProvider, ValueProvider.RuntimeValueProvider, ValueProvider.StaticValueProvider

  ---

  
  

  public interface ValueProvider<T>
  extends Serializable

  ValueProvider is an interface which abstracts the notion of fetching a value that may or may not be currently available. This can be used to parameterize transforms that only read values in at runtime, for example.

• • Nested Class Summary

    Nested Classes 

    Modifier and Type	Interface and Description
    static class	ValueProvider.Deserializer Deserializer for ValueProvider, which handles type marshalling.
    static class	ValueProvider.NestedValueProvider<T,X> ValueProvider.NestedValueProvider is an implementation of ValueProvider that allows for wrapping another ValueProvider object.
    static class	ValueProvider.RuntimeValueProvider<T> ValueProvider.RuntimeValueProvider is an implementation of ValueProvider that allows for a value to be provided at execution time rather than at graph construction time.
    static class	ValueProvider.Serializer Serializer for ValueProvider.
    static class	ValueProvider.StaticValueProvider<T> ValueProvider.StaticValueProvider is an implementation of ValueProvider that allows for a static value to be provided.

  • Method Summary

    All Methods Instance Methods Abstract Methods 

    Modifier and Type	Method and Description
    T	get() Return the value wrapped by this ValueProvider.
    boolean	isAccessible() Whether the contents of this ValueProvider is available to routines that run at graph construction time.

• • Method Detail

    • get

      T get()

      Return the value wrapped by this ValueProvider.

    • isAccessible

      boolean isAccessible()

      Whether the contents of this ValueProvider is available to routines that run at graph construction time.