CountingSource.CounterMark (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. See Migrating from Dataflow SDK 1.x for Java for migration guidance.

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

com.google.cloud.dataflow.sdk.io

Class CountingSource.CounterMark

• java.lang.Object
• • com.google.cloud.dataflow.sdk.io.CountingSource.CounterMark

• All Implemented Interfaces:

  UnboundedSource.CheckpointMark

  Enclosing class:

  CountingSource

  ---

  
  

  @DefaultCoder(value=AvroCoder.class)
  public static class CountingSource.CounterMark
  extends Object
  implements UnboundedSource.CheckpointMark

  The checkpoint for an unbounded CountingSource is simply the last value produced. The associated source object encapsulates the information needed to produce the next value.

• • Constructor Summary

    Constructors 

    Constructor and Description
    CounterMark(long lastEmitted, Instant startTime) Creates a checkpoint mark reflecting the last emitted value.

  • Method Summary

    All Methods Instance Methods Concrete Methods 

    Modifier and Type	Method and Description
    void	finalizeCheckpoint() Perform any finalization that needs to happen after a bundle of data read from the source has been processed and committed.
    long	getLastEmitted() Returns the last value emitted by the reader.
    Instant	getStartTime() Returns the time the reader was started.

    • Methods inherited from class java.lang.Object

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

• • Constructor Detail

    • CounterMark

      public CounterMark(long lastEmitted,
                         Instant startTime)

      Creates a checkpoint mark reflecting the last emitted value.

  • Method Detail

    • getLastEmitted

      public long getLastEmitted()

      Returns the last value emitted by the reader.

    • getStartTime

      public Instant getStartTime()

      Returns the time the reader was started.

    • finalizeCheckpoint

      public void finalizeCheckpoint()
                              throws IOException

      Description copied from interface: UnboundedSource.CheckpointMark
      Perform any finalization that needs to happen after a bundle of data read from the source has been processed and committed.

      For example, this could be sending acknowledgement requests to an external data source such as Pub/Sub.

      This may be called from any thread, potentially at the same time as calls to the UnboundedReader that created it.

      Specified by:

      finalizeCheckpoint in interface UnboundedSource.CheckpointMark

      Throws:

      IOException