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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 driver
Definition Classes
processing
package deltasets
Definition Classes
driver
object ResolutionStrategy
Default ResolutionStrategies to use in mapValuesWithResolver.
Default ResolutionStrategies to use in mapValuesWithResolver.
Definition Classes
deltasets
BackwardResolution
Broadcast
DirectQuery
ForwardResolution

com.here.platform.data.processing.driver.deltasets.ResolutionStrategy

BackwardResolution

Companion class BackwardResolution

object BackwardResolution extends Serializable

Defines default instances for the BackwardResolution strategy.

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def toNeighbors[V](references: DeltaSet[Key, Meta], subjectCatalog: Id, subjectLayer: Id, neighborhoodRadius: Int = 1, subjectLevel: Option[Int] = None)(implicit arg0: ClassTag[V]): BackwardResolution[Key, V]
Makes all reference tiles in the neighborhood of the subject tile available to the resolver when processing the subject tile.
Makes all reference tiles in the neighborhood of the subject tile available to the resolver when processing the subject tile. The reference tiles are provided as a DeltaSet.
references
The DeltaSet containing the referenced partition key-meta pairs.
subjectCatalog
The catalog of the subject partitions with which the references should be grouped.
subjectLayer
The layer of the subject partitions with which the references should be grouped.
neighborhoodRadius
The radius of the neighborhood, must be positive. For example, radius 0 returns the tile itself; radius 1 typically returns 9 tiles; radius 2 typically returns 25 tiles.
subjectLevel
The level of the subject tiles. If not provided, it is assumed that references and subjects have the same level.
returns
The corresponding resolution strategy.
Note
Both the subject layer and the reference layer must be HERE-tiled.
def toSamePartition[V](references: DeltaSet[Key, Meta], subjectCatalog: Id, subjectLayer: Id)(implicit arg0: ClassTag[V]): BackwardResolution[Key, V]
Makes a reference partition available to the resolver when processing the a subject partition of the same name.
Makes a reference partition available to the resolver when processing the a subject partition of the same name. The reference tiles are provided as a DeltaSet.
references
The DeltaSet containing the referenced partition key-meta pairs.
subjectCatalog
The catalog of the subject partitions with which the references should be grouped.
subjectLayer
The layer of the subject partitions with which the references should be grouped.
returns
The corresponding resolution strategy.
Note
Supports both com.here.platform.data.processing.catalog.Partition.Generic partition names and com.here.platform.data.processing.catalog.Partition.HereTiles.
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BackwardResolution

Companion class BackwardResolution

object BackwardResolution extends Serializable

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BackwardResolution

Companion class BackwardResolution

object BackwardResolution extends Serializable

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BackwardResolution