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

object Partition

Groups common types to represent partitions, both generic and tiles, as well as various types of metadata that are used in the various stages of processing.

Groups common types to represent partitions, both generic and tiles, as well as various types of metadata that are used in the various stages of processing. The information includes metadata returned by querying the catalog for a particular version, metadata returned by querying the differences between two versions, and metadata provided when committing a new version of a catalog.

Definition Classes: catalog

Change

ChangeWrapper

Checksum

Commit

CommitWrapper

Delete

Deleted

Generic

HereTile

Key

KeyOrName

Key

Companion object Key

case class Key(catalog: Id, layer: Id, partition: Name) extends KeyOrName with Product with Serializable

A key to uniquely identify a partition in compilers, driver tasks and, in general RDDs.

As it contains the identifier of the corresponding catalog, partition keys of multiple catalogs can be processed in the same RDD without collisions. Output catalogs have also their unique ID, so it is in theory possible to mix input and output partitions in the same RDD.

catalog: The ID of the catalog.
layer: The ID of the layer.
partition: The name of the partition, which is a tile ID for tiled layers and a generic string for generic layers.

Linear Supertypes

Serializable, Serializable, Product, Equals, KeyOrName, AnyRef, Any

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Inherited

Key
Serializable
Serializable
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Equals
KeyOrName
AnyRef
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Instance Constructors

new Key(catalog: Id, layer: Id, partition: Name)
catalog
The ID of the catalog.
layer
The ID of the layer.
partition
The name of the partition, which is a tile ID for tiled layers and a generic string for generic layers.

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 catalog: Id
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 isInstanceOf[T0]: Boolean

Definition Classes
Any
val layer: Id
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 partition: Name
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

Key

Companion object Key

case class Key(catalog: Id, layer: Id, partition: Name) extends KeyOrName with Product with Serializable

Instance Constructors

Value Members

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from KeyOrName

Inherited from AnyRef

Inherited from Any

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Packages

Key 

Companion object Key

case class Key(catalog: Id, layer: Id, partition: Name) extends KeyOrName with Product with Serializable

Instance Constructors

Value Members

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from KeyOrName

Inherited from AnyRef

Inherited from Any

Ungrouped

Key