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package root
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root
package com
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root
package here
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com
package platform
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here
package data
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platform
package processing
This package provides the Data Processing Library for building distributed data processing applications.
This package provides the Data Processing Library for building distributed data processing applications.
A Runner both implements the interface with the environment for an application to run, and starts the application. The application, in turn, is driven by a Driver, that controls and performs the distributed processing.
Choose a Runner best suited for the environment where the application runs.
The Driver performs one of more tasks which read layers from input catalogs and write to one or more layers of an output catalog.
The main entry point in the processing library is the com.here.platform.data.processing.driver.DriverBuilder class where you can add different kinds of tasks to the driver. The driver runs the tasks, and commits the final results to the output catalog.
Tasks are implemented using one or more compilers.
The simplest compiler is the direct compiler which maps each input tile to N output tiles. The application needs to define com.here.platform.data.processing.compiler.Direct1ToNCompiler.
Other more complex compilation patterns are based on some kind of dependency tracking between input partitions and output partitions.
The processing Library supports the following patterns:
- com.here.platform.data.processing.compiler.NonIncrementalCompiler: non-incremental compilation only - com.here.platform.data.processing.compiler.DepCompiler: non-incremental dependency calculation and incremental compilation - com.here.platform.data.processing.compiler.IncrementalDepCompiler: incremental dependency calculation and compilation - com.here.platform.data.processing.compiler.Direct1ToNCompiler: incremental compilation where every output tile depends only on one input tile, and this mapping is independent from tile content - com.here.platform.data.processing.compiler.DirectMToNCompiler: incremental compilation where every output tile depends on multiple input tiles, and this mapping is independent from tile content - com.here.platform.data.processing.compiler.MapGroupCompiler: incremental compilation where every output tile can depend on multiple input tiles, and this mapping depend on the tile content - com.here.platform.data.processing.compiler.RefTreeCompiler: fully-managed two phases incremental compilation that can resolve references between input partitions. Input/Output dependency management is implemented and the developer doesn't need to provide this logic
The application's main object normally mixes in the a runner trait (like PipelineRunner) to setup the Driver, and interfaces with the environment where the application is run. See the Main classes in the example compilers for more details.
com.here.platform.data.processing.catalog, com.here.platform.data.processing.blobstore, and com.here.platform.data.processing.publisher contain utilities for accessing catalogs and payloads in a Spark-friendly way, providing an RDD-based abstraction over data and metadata. These classes are used by the processing library, but can also be used independently.
Definition Classes
data
package publisher
Definition Classes
processing
DataPublisher
FullPublishingMode
IncrementalPublishingMode
NonEmptyPublishingAction
Publisher
PublishingAction
PublishingMode

com.here.platform.data.processing.publisher

PublishingAction

Companion class PublishingAction

object PublishingAction extends Serializable

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final case class PulledFromBase(meta: Meta) extends NonEmptyPublishingAction with Product with Serializable
Like Upload, but since the partition has been published already with the same content in the base catalog too there's no need to publish a commit partition.
Like Upload, but since the partition has been published already with the same content in the base catalog too there's no need to publish a commit partition.
meta
the metadata of the base change pointing at the same content.
final case class RebaseUpload(payloadOrMeta: Either[DigestedPayload, Meta]) extends NonEmptyPublishingAction with Product with Serializable
Similar to Upload, but while the existing metadata is equal to this payload a base change makes it necessary to re-publish this payload.
Similar to Upload, but while the existing metadata is equal to this payload a base change makes it necessary to re-publish this payload.
payloadOrMeta
The produced payload that must be re-published or the existing metadata pointing at the same content, in case the payload hasn't been recompiled.
final case class Upload(payload: DigestedPayload) extends NonEmptyPublishingAction with Product with Serializable
Upload a new or changed partition.
Upload a new or changed partition.
payload
The partition content.

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case object Delete extends NonEmptyPublishingAction with Product with Serializable
Delete this partition.
case object DeletedFromBase extends NonEmptyPublishingAction with Product with Serializable
Like Delete, but since the partition has been deleted in the base catalog too there's no need to publish a commit partition.
case object RebaseDelete extends NonEmptyPublishingAction with Product with Serializable
Like Delete, but the partition was missing already in the existing data, yet a base change makes it necessary to re-publish a delete commit partition.
case object Skip extends PublishingAction with Product with Serializable
Skip this partition as it's identical to the existing data and not touched by the base changes.

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Deprecated
(Since version 9)

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PublishingAction

Companion class PublishingAction

object PublishingAction extends Serializable

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PublishingAction

Companion class PublishingAction

object PublishingAction extends Serializable

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PublishingAction