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 catalog

Contains an abstract Scala interface for accessing catalogs from Spark.

Use the com.here.platform.data.processing.catalog.Catalog factory methods to obtain instances.

Definition Classes: processing

package datastore

Definition Classes: catalog

package utils

Classes representing catalog versions.

Definition Classes: catalog

AppCredentials

AppInfo

Catalog

CatalogFactory

CatalogLight

CatalogLightFactory

CatalogMetrics

CatalogNullMetrics

CatalogProxy

CatalogView

CatalogViewAtVersion

CatalogViewLight

CatalogViewSinceVersion

Configuration

Dependency

DependencyType

DirectDependency

EmptyCatalogView

EndpointLocatorSettings

Implicits

IndirectDependency

Layer

LayerConfiguration

NonEmptyCatalogView

Partition

Partitioning

QueryPersistence

QueryReuse

ServiceSupport

com.here.platform.data.processing.catalog

CatalogViewLight

trait CatalogViewLight extends AnyRef

Provides a view on a specific version of a CatalogLight.

Linear Supertypes

AnyRef, Any

Known Subclasses

CatalogView, CatalogViewAtVersion, CatalogViewSinceVersion, EmptyCatalogView, NonEmptyCatalogView

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Abstract Value Members

abstract def catalog: CatalogLight
The catalog
abstract def querySinglePartitions(layer: Id, partitions: Set[Name]): Map[Key, Meta]
Queries metadata for the given partitions.
Queries metadata for the given partitions.
You can query up to 100 partitions with one call.
layer
The layer that contains the partitions being queried.
partitions
The partition names that should be queried.
returns
The queried metadata, for partitions that have content in the version referenced by this catalog view. Partitions not present are not returned.

Note
Querying large amounts of metadata using this function is expensive and should be avoided. Instead, CatalogView.queryAll(...) should be used whenever possible.

Concrete Value Members

final def !=(arg0: Any): Boolean

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

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

Definition Classes
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final def asInstanceOf[T0]: T0

Definition Classes
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def clone(): AnyRef

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

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
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def finalize(): Unit

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

Definition Classes
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Annotations
@native()
def hashCode(): Int

Definition Classes
AnyRef → Any
Annotations
@native()
def hrn: HRN
The HRN (HERE Resource Name) of the catalog.
The HRN (HERE Resource Name) of the catalog. It is a resource descriptor that provides a globally unique handle for a catalog in the sense of an instance.
def id: Id
The unique identifier for the catalog, that is added to every Partition.Key returned by the query APIs and is used by the commit API for logging and statistics generation.
The unique identifier for the catalog, that is added to every Partition.Key returned by the query APIs and is used by the commit API for logging and statistics generation.

See also
Catalog.Id for more details.
final def isInstanceOf[T0]: Boolean

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

Definition Classes
AnyRef
final def notify(): Unit

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

Definition Classes
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Annotations
@native()
def retriever: Retriever
Exposes the Retriever for this catalog.
Exposes the Retriever for this catalog. The returned object can be captured in Spark functions and transmitted to worker nodes.
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
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final def wait(): Unit

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@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

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

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@throws( ... ) @native()

Packages

CatalogViewLight

trait CatalogViewLight extends AnyRef

Abstract Value Members

Concrete Value Members

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Packages

CatalogViewLight 

trait CatalogViewLight extends AnyRef

Abstract Value Members

Concrete Value Members

Inherited from AnyRef

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CatalogViewLight