Packages

package root

Definition Classes: root

package com

Definition Classes: root

package here

Definition Classes: com

package platform

Definition Classes: here

package data

Definition Classes: platform

package processing

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.

Definition Classes: deltasets

BackwardResolution

Broadcast

DirectQuery

ForwardResolution

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

DirectQuery

case class DirectQuery(referenceCatalog: Id, referenceLayers: Set[Id], cacheSize: Long = 10000) extends ResolutionStrategy[Any, Any] with Product with Serializable

Resolves a reference by directly querying the Data API.

referenceCatalog: The catalog to query.
referenceLayers: The layers to query.
cacheSize: The number of key-meta pairs to keep in a local cache to avoid querying the service several times for the same key. Defaults to 10000.

Linear Supertypes

Serializable, Serializable, Product, Equals, ResolutionStrategy[Any, Any], AnyRef, Any

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DirectQuery
Serializable
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Instance Constructors

new DirectQuery(referenceCatalog: Id, referenceLayers: Set[Id], cacheSize: Long = 10000)
referenceCatalog
The catalog to query.
referenceLayers
The layers to query.
cacheSize
The number of key-meta pairs to keep in a local cache to avoid querying the service several times for the same key. Defaults to 10000.

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
val cacheSize: Long
def clone(): AnyRef

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws( ... ) @native()
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def finalize(): Unit

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
Annotations
@native()
final def instantiate(context: DeltaContext, config: DeltaSetConfig, preferredPartitioner: Partitioner[Key]): ResolutionStrategyInstance[Any, Any]
Maps a ResolutionStrategy to its corresponding implementation.
Maps a ResolutionStrategy to its corresponding implementation.
context
The current DeltaContext.
config
The configuration of the transformation.
returns
A ResolutionStrategy instance.

Definition Classes
DirectQuery → ResolutionStrategy
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
Annotations
@native()
final def notifyAll(): Unit

Definition Classes
AnyRef
Annotations
@native()
val referenceCatalog: Id
val referenceLayers: Set[Id]
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... ) @native()

Packages

DirectQuery

case class DirectQuery(referenceCatalog: Id, referenceLayers: Set[Id], cacheSize: Long = 10000) extends ResolutionStrategy[Any, Any] with Product with Serializable

Instance Constructors

Value Members

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from ResolutionStrategy[Any, Any]

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

DirectQuery 

case class DirectQuery(referenceCatalog: Id, referenceLayers: Set[Id], cacheSize: Long = 10000) extends ResolutionStrategy[Any, Any] with Product with Serializable

Instance Constructors

Value Members

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from ResolutionStrategy[Any, Any]

Inherited from AnyRef

Inherited from Any

Ungrouped

DirectQuery