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

Uploader

class Uploader extends blobstore.Uploader

Implements the com.here.platform.data.processing.blobstore.Uploader using the DataStore client.

Linear Supertypes

blobstore.Uploader, Serializable, Serializable, AnyRef, Any

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Uploader
Uploader
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Visibility

Public
All

Instance Constructors

new Uploader(catalogId: Id, catalogHrn: HRN, digests: Map[Id, blobstore.Digest], appInfo: Option[AppInfo] = None, idGenerator: BlobIdGenerator = new UUIDBlobIdGenerator, endpointLocatorSettings: Option[EndpointLocatorSettings] = None)
catalogId
the unique identifier of the catalog for which this Uploader is being created
catalogHrn
the HRN of the catalog for which this Uploader is being created
appInfo
the optional app info used to work with DataStore. If undefined, the default DataStore client credentials are used.
idGenerator
optional blob ID generator. If not specified, the library uses the standard UUIDBlobIdGenerator from DataStore client.
endpointLocatorSettings
the endpoint locator settings used to work with DataStore

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()
val digests: Map[Id, blobstore.Digest]
Map of the Digest objects per layer.
Map of the Digest objects per layer.

Definition Classes
Uploader → Uploader
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()
def putPayload(key: Key, payload: DigestedPayload): Put

Definition Classes
Uploader → Uploader
final def putPayload(key: Key, payload: Payload): Put
Uploads the com.here.platform.data.processing.blobstore.Payload of a Partition.
Uploads the com.here.platform.data.processing.blobstore.Payload of a Partition.
key
The key identifying a partition.
payload
The com.here.platform.data.processing.blobstore.Payload to upload.
returns
The assigned metadata with the com.here.platform.data.processing.blobstore.Payload URL to be committed.

Definition Classes
Uploader
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

Uploader

class Uploader extends blobstore.Uploader

Instance Constructors

Value Members

Inherited from blobstore.Uploader

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

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Packages

Uploader 

class Uploader extends blobstore.Uploader

Instance Constructors

Value Members

Inherited from blobstore.Uploader

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped

Uploader