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 blobstore

Contains an abstract interface used to access BlobStore.

Obtain the retriever and uploader for a catalog directly from the com.here.platform.data.processing.catalog.Catalog instance.

Definition Classes: processing

package caching

Definition Classes: blobstore

package engine

Definition Classes: blobstore

ByteArrayPayload

DefaultDigest

Digest

DigestedPayload

FilePayload

Implicits

Payload

RetrieveLogging

RetrieveMetrics

Retriever

SimpleDigest

UploadLogging

UploadMetrics

Uploader

com.here.platform.data.processing.blobstore

DefaultDigest

object DefaultDigest extends SimpleDigest

The default digest object. It computes the checksum of a Payload using the MD5 algorithm.

Linear Supertypes

SimpleDigest, Digest, Serializable, Serializable, AnyRef, Any

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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
val algorithm: String

Definition Classes
SimpleDigest
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws( ... ) @native()
def digest(file: File): Checksum
Computes the checksum of the content of a file.
Computes the checksum of the content of a file. This method is internally used to compute the checksum of FilePayloads, but can be used with any file.
file
The file.
returns
The checksum of the content of the file.

Definition Classes
SimpleDigest → Digest
def digest(content: Array[Byte]): Checksum
Computes the checksum of byte array.
Computes the checksum of byte array. This method is internally used to compute the checksum of ByteArrayPayloads, but can be used with any byte array.
content
The byte array.
returns
The checksum of the content of the array.

Definition Classes
SimpleDigest → Digest
final def digest(payload: Payload): Checksum
Computes the checksum of a payload.
Computes the checksum of a payload.
payload
The payload object.
returns
The checksum of the payload.

Definition Classes
Digest
final def eq(arg0: AnyRef): Boolean

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

Definition Classes
SimpleDigest → 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
SimpleDigest → AnyRef → Any
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
SimpleDigest → 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

DefaultDigest

object DefaultDigest extends SimpleDigest

Value Members

Inherited from SimpleDigest

Inherited from Digest

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

DefaultDigest 

object DefaultDigest extends SimpleDigest

Value Members

Inherited from SimpleDigest

Inherited from Digest

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

DefaultDigest