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 java

This package provides Java bindings for the Data Processing Library, to build distributed data processing applications in Java.

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.java.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 implement a com.here.platform.data.processing.java.compiler.Direct1ToNCompiler.

Other more complex compilation patterns are based on different types of dependency tracking between input partitions and output partitions.

The processing Library supports the following patterns:

- com.here.platform.data.processing.java.compiler.NonIncrementalCompiler: non-incremental compilation only - com.here.platform.data.processing.java.compiler.DepCompiler: non-incremental dependency calculation and incremental compilation - com.here.platform.data.processing.java.compiler.IncrementalDepCompiler: incremental dependency calculation and compilation - com.here.platform.data.processing.java.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.java.compiler.DirectMToNCompiler: incremental compilation where every output tile can depend on multiple input tiles, and this mapping is independent from tile content - com.here.platform.data.processing.java.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.java.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 extends a runner class (like PipelineRunner) to setup the Driver, and interfaces with the environment where the application runs. For more details, see the Main classes in the example compilers.

com.here.platform.data.processing.java.catalog, com.here.platform.data.processing.java.blobstore, and com.here.platform.data.processing.java.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: processing

package driver

Definition Classes: java

package config

Definition Classes: driver

package filter

Definition Classes: driver

package job

Definition Classes: driver

Default

Driver

DriverBuilder

DriverContext

DriverTask

MultiCompilerTaskBuilder

TaskBuilder

TaskResult

com.here.platform.data.processing.java.driver

DriverContext

Companion object DriverContext

abstract class DriverContext extends AnyRef

Provides access to a set of common resources a com.here.platform.data.processing.driver.Driver has that can be used by DriverTasks and Compilers.

Note: This is a Java friendly version of com.here.platform.data.processing.driver.DriverContext.

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new DriverContext()

Abstract Value Members

abstract def completeConfig: CompleteConfig
The original CompleteConfig used to create this context.
abstract def config: DriverConfig
The DriverConfig used to create this context.
abstract def feedbackCatalog: Catalog
The feedback catalog.
abstract def feedbackCatalogConfiguration: Configuration
Configuration of the feedback catalog.
abstract def feedbackCatalogId: String
Identifier of the feedback catalog.
abstract def feedbackRetriever: Retriever
To retrieve payloads of partitions of the feedback catalog.
abstract def inCatalogConfigurations: Map[String, Configuration]
Configurations of each input catalog.
abstract def inCatalogView(id: String): CatalogView
Can be used to a construct a view on the latest version of an input catalog.
Can be used to a construct a view on the latest version of an input catalog.
id
The catalog identifier of an input catalog or the feedback catalog.
returns
A view on the latest version of the input catalog, or a view on the feedback version of the output catalog.
abstract def inCatalogs: Map[String, Catalog]
The input catalogs.
abstract def inRetriever(catalogId: String): Retriever
To retrieve payloads of partitions of the input catalog.
abstract def jobVersions: JobVersions
The description of the current job, with details about versions and changes in catalogs.
abstract def outCatalog: Catalog
The output catalog.
abstract def outCatalogConfiguration: Configuration
Configuration of the output catalog.
abstract def outCatalogId: String
Identifier of the output catalog provided in the com.here.platform.data.processing.driver.job.Job.
abstract def outRetriever: Retriever
To retrieve payloads of partitions of the output catalog.
abstract def publisher: Publisher
To prepare a commit by uploading only the changed payloads and calculating the metadata for the commit.
abstract def spark: JavaSparkContext
The Spark context as part of which the com.here.platform.data.processing.driver.Driver is running.
abstract def statistics: Statistics
The statistics.
abstract def inRetrievers: Map[String, Retriever]
To retrieve payloads of partitions of the input catalog.
To retrieve payloads of partitions of the input catalog.

Annotations
@Deprecated
Deprecated
As of version 2.8.31. Use the inRetriever method of DriverContext instead.

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Packages

DriverContext

Companion object DriverContext

abstract class DriverContext extends AnyRef

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DriverContext 

Companion object DriverContext

abstract class DriverContext extends AnyRef

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DriverContext