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

LockingKafkaContext

class LockingKafkaContext extends KafkaContext

A KafkaContext that performs offset lookup/committing by synchronizing on the consumer, which out of the box is not thread safe. The source that provides this context also synchronizes on the same lock during polls.

Linear Supertypes
KafkaContext, AnyRef, Any
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Inherited
  1. LockingKafkaContext
  2. KafkaContext
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new LockingKafkaContext(consumer: KafkaConsumer[Array[Byte], Array[Byte]], consumerGroup: String, lock: ReentrantLock)

    consumer

    Kafka consumer to use.

    lock

    Lock to synchronize on.

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 commitSync(offsets: Map[TopicPartition, OffsetAndMetadata]): Unit

    Commits offsets to Kafka synchronously.

    Commits offsets to Kafka synchronously.

    Definition Classes
    LockingKafkaContext → KafkaContext
  7. def committed(topicPartitions: Set[TopicPartition]): Map[TopicPartition, Option[OffsetAndMetadata]]

    Retrieves the committed offsets for the given topic partitions from Kafka.

    Retrieves the committed offsets for the given topic partitions from Kafka.

    Definition Classes
    LockingKafkaContext → KafkaContext
  8. val consumerGroup: String

    The consumer group ID.

    The consumer group ID.

    Definition Classes
    LockingKafkaContext → KafkaContext
  9. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  10. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  11. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  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 offsetsForTimes(timestamps: Map[TopicPartition, Long]): Map[TopicPartition, Option[OffsetAndTimestamp]]

    Look up the offsets for the given partitions by timestamp.

    Look up the offsets for the given partitions by timestamp.

    Definition Classes
    LockingKafkaContext → KafkaContext
  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 KafkaContext

Inherited from AnyRef

Inherited from Any

Ungrouped