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 engine

Definition Classes: blobstore

package v2

Contains an implementation used to access BlobStore using DataStore client.

The retriever using the DataStore client library is Retriever. The uploader using the DataStore client library is Uploader.

Definition Classes: engine

ChecksumVersionIdGenerator

Digest

Retriever

Uploader

com.here.platform.data.processing.blobstore.engine.v2

Digest

class Digest extends blobstore.Digest

Linear Supertypes

blobstore.Digest, Serializable, AnyRef, Any

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Digest
Digest
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Instance Constructors

new Digest(hrn: HRN, layer: Id)

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(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @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
Digest → 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
Digest → 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
Digest → AnyRef → Any
final def getClass(): Class[_ <: AnyRef]
Definition Classes
AnyRef → Any
Annotations
@IntrinsicCandidate() @native()
def hashCode(): Int
Definition Classes
Digest → 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
@IntrinsicCandidate() @native()
final def notifyAll(): Unit
Definition Classes
AnyRef
Annotations
@IntrinsicCandidate() @native()
final def synchronized[T0](arg0: => T0): T0
Definition Classes
AnyRef
def toString(): String
Definition Classes
AnyRef → Any
final def wait(arg0: Long, arg1: Int): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException]) @native()
final def wait(): Unit
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

def finalize(): Unit
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.Throwable]) @Deprecated
Deprecated
(Since version 9)

Packages

Digest

class Digest extends blobstore.Digest

Instance Constructors

Value Members

Deprecated Value Members

Inherited from blobstore.Digest

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

Digest

class Digest extends blobstore.Digest

Instance Constructors

Value Members

Deprecated Value Members

Inherited from blobstore.Digest

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

Digest