Packages

  • package root
    Definition Classes
    root
  • package com
    Definition Classes
    root
  • package adform
    Definition Classes
    com
  • package streamloader

    The entry point of the stream loader library is the StreamLoader class, which requires a KafkaSource and a Sink.

    The entry point of the stream loader library is the StreamLoader class, which requires a KafkaSource and a Sink. Once started it will subscribe to the provided topics and will start polling and sinking records. The sink has to be able to persist records and to look up committed offsets (technically this is optional, but without it there would be no way to provide any delivery guarantees). A large class of sinks are batch based, implemented as RecordBatchingSink. This sink accumulate batches of records using some RecordBatcher and once ready, stores them to some underlying RecordBatchStorage. A common type of batch is file based, i.e. a batcher might write records to a temporary file and once the file is full the sink commits the file to some underlying storage, such as a database or a distributed file system like HDFS.

    A sketch of the class hierarchy illustrating the main classes and interfaces can be seen below.



    For concrete storage implementations see the clickhouse, hadoop, s3 and vertica packages. They also contain more file builder implementations than just the CsvFileBuilder included in the core library.

    Definition Classes
    adform
  • package source
    Definition Classes
    streamloader
  • KafkaContext
  • KafkaSource
  • LockingKafkaContext
  • MaxWatermarkProvider
  • WatermarkProvider
c

com.adform.streamloader.source

MaxWatermarkProvider

class MaxWatermarkProvider extends WatermarkProvider with Logging

Watermark provider that sets the watermark to the maximum observed event time. In order to protect from malformed messages with timestamps from the future, values greater than a predefined threshold above the current time are rejected and do not advance the watermark.

Linear Supertypes
Logging, WatermarkProvider, AnyRef, Any
Ordering
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Inherited
  1. MaxWatermarkProvider
  2. Logging
  3. WatermarkProvider
  4. AnyRef
  5. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new MaxWatermarkProvider(validWatermarkDiff: Duration)(implicit timeProvider: TimeProvider = TimeProvider.system)

    validWatermarkDiff

    Upper limit for setting watermarks greater than the current time.

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  6. def currentWatermark: Timestamp

    Returns the current watermark.

    Returns the current watermark.

    Definition Classes
    MaxWatermarkProvider → WatermarkProvider
  7. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  8. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  9. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  10. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. def initialize(initialWatermark: Timestamp): Timestamp

    Initializes the provider to a specified watermark.

    Initializes the provider to a specified watermark.

    initialWatermark

    The initial watermark to initialize to.

    returns

    The initial watermark.

    Definition Classes
    MaxWatermarkProvider → WatermarkProvider
  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  13. val log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. def observeEvent(timestamp: Timestamp): Timestamp

    Observes a new event and moves the watermark forward if needed.

    Observes a new event and moves the watermark forward if needed.

    timestamp

    Timestamp of the new event.

    returns

    The current watermark.

    Definition Classes
    MaxWatermarkProvider → WatermarkProvider
  18. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    AnyRef → Any
  20. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  21. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  22. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

    (Since version 9)

Inherited from Logging

Inherited from WatermarkProvider

Inherited from AnyRef

Inherited from Any

Ungrouped