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 compiler

Definition Classes: processing

package direct

Definition Classes: compiler

package mapgroup

Definition Classes: compiler

package reftree

Definition Classes: compiler

CompileOut1To1Fn

CompileOut1ToNFn

CompileOutFn

CompileOutLayerStackFn

DepCompiler

DepCompilerBase

Direct1ToNCompiler

DirectMToNCompiler

IncrementalDepCompiler

InputLayers

InputOptPartitioner

InputPartitioner

MapGroupCompiler

NonIncrementalCompiler

OutputLayers

OutputOptPartitioner

OutputPartitioner

RefTreeCompiler

com.here.platform.data.processing.compiler

CompileOut1To1Fn

trait CompileOut1To1Fn[T] extends CompileOutFn[T]

Produces one com.here.platform.data.processing.blobstore.Payload for each "nominal" output partition the compiler generates.

T: the custom type of the values passed between front-end and back-end

Linear Supertypes

CompileOutFn[T], Serializable, Serializable, AnyRef, Any

Known Subclasses

Direct1ToNCompileOutFnWrapper, MapGroupToRefTreeWrapper1To1, WrapperCompileOut1To1Fn

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CompileOut1To1Fn
CompileOutFn
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Abstract Value Members

abstract def compileOutFn(outKey: OutKey, intermediate: Iterable[T]): Option[Payload]
Compiles a single output partition.
Compiles a single output partition.
outKey
the key of the output partition to generate
intermediate
non-empty scala.Iterable of intermediate data as provided by compileInFn which is required to compile the output partition. This collection will have multiple entries of the same value in case the same value was returned for this outKey by multiple compileInFn executions (for different input keys). outKeys which do not have any intermediate values assigned from the compileInFn calls get deleted automatically.
returns
scala.Option of com.here.platform.data.processing.blobstore.Payload, this method is to return exactly one element, with the same values for the output key as passed in outKey. either the partition content, or None if there is no data to be published.

Concrete 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
def clone(): AnyRef

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws( ... ) @native()
final def compileOutFnDefined(): Unit
Must be overridden as final by all subclasses, to block the mixin of different interfaces in the same compiler class and to assure that at least one child interface is mixed in.
Must be overridden as final by all subclasses, to block the mixin of different interfaces in the same compiler class and to assure that at least one child interface is mixed in.

Attributes
protected
Definition Classes
CompileOut1To1Fn → CompileOutFn
final def eq(arg0: AnyRef): Boolean

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

Definition Classes
AnyRef → Any
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()
def hashCode(): Int

Definition Classes
AnyRef → Any
Annotations
@native()
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()
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
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

CompileOut1To1Fn

trait CompileOut1To1Fn[T] extends CompileOutFn[T]

Abstract Value Members

Concrete Value Members

Inherited from CompileOutFn[T]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

CompileOut1To1Fn 

trait CompileOut1To1Fn[T] extends CompileOutFn[T]

Abstract Value Members

Concrete Value Members

Inherited from CompileOutFn[T]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

CompileOut1To1Fn