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 catalog

Java bindings for the catalog package.

Definition Classes: java

package partition

Definition Classes: catalog

package partitioning

Definition Classes: catalog

package utils

Definition Classes: catalog

CatalogViewSinceVersion

com.here.platform.data.processing.java.catalog

EmptyCatalogView

final class EmptyCatalogView extends CatalogView

Provides a view on an empty catalog. This can be used to model the access of a catalog in a version that does not exist.

Linear Supertypes

CatalogView, AnyRef, Any

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EmptyCatalogView
CatalogView
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Any

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Instance Constructors

new EmptyCatalogView(catalog: Catalog)
catalog
The catalog which is encapsulated by this view.

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
val catalog: Catalog
The catalog which is encapsulated by this view.
The catalog which is encapsulated by this view.
Definition Classes
EmptyCatalogView → CatalogView
def clone(): AnyRef
Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
def empty(partitioner: PartitionerOfKey): JavaPairRDD[Key, Meta]
Creates a partitioned empty RDD of (Key, Meta) in compliance with other methods of this component.
Creates a partitioned empty RDD of (Key, Meta) in compliance with other methods of this component.
partitioner
The com.here.platform.data.processing.java.spark.partitioner.PartitionerOfKey applied when constructing the RDD returned.
returns
An empty RDD of (com.here.platform.data.processing.java.catalog.partition.Key, com.here.platform.data.processing.java.catalog.partition.Meta), which is partitioned according to the partitioner parameter.
Definition Classes
CatalogView
def empty(): JavaPairRDD[Key, Meta]
Creates a partitioned empty RDD of (Key, Meta) in compliance with other methods of this component.
Creates a partitioned empty RDD of (Key, Meta) in compliance with other methods of this component. This version uses the root log context.
returns
An empty RDD of (com.here.platform.data.processing.java.catalog.partition.Key, com.here.platform.data.processing.java.catalog.partition.Meta), which is partitioned according to the default partitioner of the catalog.
Definition Classes
CatalogView
final def eq(arg0: AnyRef): Boolean
Definition Classes
AnyRef
def equals(arg0: AnyRef): Boolean
Definition Classes
AnyRef → Any
final def getClass(): Class[_ <: AnyRef]
Definition Classes
AnyRef → Any
Annotations
@IntrinsicCandidate() @native()
def hashCode(): Int
Definition Classes
AnyRef → Any
Annotations
@IntrinsicCandidate() @native()
def hrn: HRN
The HRN (HERE Resource Name) of the catalog.
The HRN (HERE Resource Name) of the catalog. It is a resource descriptor that provides a globally unique handle for a catalog in the sense of an instance.
Definition Classes
CatalogView
def id: String
The unique identifier for the catalog, that is added to every com.here.platform.data.processing.java.catalog.partition.Key returned by the query APIs and is used by the commit API for logging and statistics generation.
The unique identifier for the catalog, that is added to every com.here.platform.data.processing.java.catalog.partition.Key returned by the query APIs and is used by the commit API for logging and statistics generation.
Definition Classes
CatalogView
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()
def retriever: Retriever
Exposes the Retriever for this catalog.
Exposes the Retriever for this catalog. The returned object can be captured in Spark functions and transmitted to worker nodes.
Definition Classes
CatalogView
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

EmptyCatalogView

final class EmptyCatalogView extends CatalogView

Instance Constructors

Value Members

Deprecated Value Members

Inherited from CatalogView

Inherited from AnyRef

Inherited from Any

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Packages

EmptyCatalogView

final class EmptyCatalogView extends CatalogView

Instance Constructors

Value Members

Deprecated Value Members

Inherited from CatalogView

Inherited from AnyRef

Inherited from Any

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EmptyCatalogView