DurationCoder (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.coders

Class DurationCoder

• java.lang.Object
• • com.google.cloud.dataflow.sdk.coders.StandardCoder<T>
  • • com.google.cloud.dataflow.sdk.coders.DeterministicStandardCoder<T>
    • • com.google.cloud.dataflow.sdk.coders.AtomicCoder<ReadableDuration>
      • • com.google.cloud.dataflow.sdk.coders.DurationCoder

• All Implemented Interfaces:

  Coder<ReadableDuration>, Serializable

  ---

  
  

  public class DurationCoder
  extends AtomicCoder<ReadableDuration>

  A Coder that encodes a joda Duration as a Long using the format of VarLongCoder.

  See Also:

  Serialized Form

• • Nested Class Summary

    • Nested classes/interfaces inherited from interface com.google.cloud.dataflow.sdk.coders.Coder

      Coder.Context, Coder.NonDeterministicException

  • Method Summary

    All Methods Static Methods Instance Methods Concrete Methods 

    Modifier and Type	Method and Description
    boolean	consistentWithEquals() Returns true if this Coder is injective with respect to Object.equals(java.lang.Object).
    ReadableDuration	decode(InputStream inStream, Coder.Context context) Decodes a value of type T from the given input stream in the given context.
    void	encode(ReadableDuration value, OutputStream outStream, Coder.Context context) Encodes the given value of type T onto the given output stream in the given context.
    boolean	isRegisterByteSizeObserverCheap(ReadableDuration value, Coder.Context context) Returns whether Coder.registerByteSizeObserver(T, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver, com.google.cloud.dataflow.sdk.coders.Coder.Context) cheap enough to call for every element, that is, if this Coder can calculate the byte size of the element to be coded in roughly constant time (or lazily).
    static DurationCoder	of()
    void	registerByteSizeObserver(ReadableDuration value, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver observer, Coder.Context context) Notifies the ElementByteSizeObserver about the byte size of the encoded value using this Coder.

    • Methods inherited from class com.google.cloud.dataflow.sdk.coders.AtomicCoder

      getCoderArguments, getInstanceComponents

    • Methods inherited from class com.google.cloud.dataflow.sdk.coders.DeterministicStandardCoder

      verifyDeterministic

    • Methods inherited from class com.google.cloud.dataflow.sdk.coders.StandardCoder

      asCloudObject, equals, getAllowedEncodings, getComponents, getEncodedElementByteSize, getEncodingId, hashCode, structuralValue, toString, verifyDeterministic, verifyDeterministic

    • Methods inherited from class java.lang.Object

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

• • Method Detail

    • of

      public static DurationCoder of()

    • encode

      public void encode(ReadableDuration value,
                         OutputStream outStream,
                         Coder.Context context)
                  throws CoderException,
                         IOException

      Description copied from interface: Coder
      Encodes the given value of type T onto the given output stream in the given context.

      Throws:

      CoderException - if the value could not be encoded for some reason

      IOException - if writing to the OutputStream fails for some reason

    • decode

      public ReadableDuration decode(InputStream inStream,
                                     Coder.Context context)
                              throws CoderException,
                                     IOException

      Description copied from interface: Coder
      Decodes a value of type T from the given input stream in the given context. Returns the decoded value.

      Throws:

      CoderException - if the value could not be decoded for some reason

      IOException - if reading from the InputStream fails for some reason

    • consistentWithEquals

      public boolean consistentWithEquals()

      Returns true if this Coder is injective with respect to Object.equals(java.lang.Object).

      Whenever the encoded bytes of two values are equal, then the original values are equal according to Objects.equals(). Note that this is well-defined for null.

      This condition is most notably false for arrays. More generally, this condition is false whenever equals() compares object identity, rather than performing a semantic/structural comparison.

      Specified by:

      consistentWithEquals in interface Coder<ReadableDuration>

      Overrides:

      consistentWithEquals in class StandardCoder<ReadableDuration>

      Returns:

      true. This coder is injective.

    • isRegisterByteSizeObserverCheap

      public boolean isRegisterByteSizeObserverCheap(ReadableDuration value,
                                                     Coder.Context context)

      Returns whether Coder.registerByteSizeObserver(T, com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver, com.google.cloud.dataflow.sdk.coders.Coder.Context) cheap enough to call for every element, that is, if this Coder can calculate the byte size of the element to be coded in roughly constant time (or lazily).

      Not intended to be called by user code, but instead by PipelineRunner implementations.

      Specified by:

      isRegisterByteSizeObserverCheap in interface Coder<ReadableDuration>

      Overrides:

      isRegisterByteSizeObserverCheap in class StandardCoder<ReadableDuration>

      Returns:

      true, because it is cheap to ascertain the byte size of a long.

    • registerByteSizeObserver

      public void registerByteSizeObserver(ReadableDuration value,
                                           com.google.cloud.dataflow.sdk.util.common.ElementByteSizeObserver observer,
                                           Coder.Context context)
                                    throws Exception

      Description copied from class: StandardCoder
      Notifies the ElementByteSizeObserver about the byte size of the encoded value using this Coder.

      Not intended to be called by user code, but instead by PipelineRunner implementations.

      For StandardCoder subclasses, this notifies observer about the byte size of the encoded value using this coder as returned by StandardCoder.getEncodedElementByteSize(T, com.google.cloud.dataflow.sdk.coders.Coder.Context).

      Specified by:

      registerByteSizeObserver in interface Coder<ReadableDuration>

      Overrides:

      registerByteSizeObserver in class StandardCoder<ReadableDuration>

      Throws:

      Exception