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 driver

Definition Classes: processing

package modes

Definition Classes: driver

ContextAwareMode

FingerprintsChecking

IncrementalBaseMode

IncrementalMode

IncrementalStatefulMode

MultiExecutorsBaseMode

MultiExecutorsIncrementalMode

MultiExecutorsNonIncrementalMode

NonIncrementalBaseMode

NonIncrementalMode

NonIncrementalStatefulMode

PreviousVersionsChecking

SkipIfNoChangesMode

TaskMode

com.here.platform.data.processing.driver.modes

PreviousVersionsChecking

trait PreviousVersionsChecking extends ContextAwareMode with ContextLogging

Verifies if, for every input catalog we're trying to compile incrementally, the output catalog has a corresponding dependency matching the "from" version.

This is used to strictly verify that we're about to compile incrementally from version V to any newer version on top of an output catalog that was actually derived from version V. If this doesn't hold for every input catalog, the result of incremental compilation is not correct, so we disable the mode this trait is mixed in. As a consequence, a non-incremental mode runs instead.

Linear Supertypes

ContextLogging, ContextAwareMode, TaskMode, AnyRef, Any

Ordering

Alphabetic
By Inheritance

Inherited

PreviousVersionsChecking
ContextLogging
ContextAwareMode
TaskMode
AnyRef
Any

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Visibility

Public
All

Abstract Value Members

abstract def run(): TaskResult
Executes the compiler if the task mode is applicable for the com.here.platform.data.processing.driver.job.Job.
Executes the compiler if the task mode is applicable for the com.here.platform.data.processing.driver.job.Job.
returns
the result of the compilation if applicable, otherwise None

Definition Classes
TaskMode

Concrete 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 classForLogger: Class[_]
Override this to change the class that is displayed in logs.
Override this to change the class that is displayed in logs.

Attributes
protected
Definition Classes
ContextLogging
def clone(): AnyRef

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws( ... ) @native()
val context: DriverContext

Definition Classes
ContextAwareMode
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()
def isApplicable: Boolean
Checks whether the given driver task is applicable.
Checks whether the given driver task is applicable.
returns
if the mode is applicable, so if the mode should run and its result evaluated

Definition Classes
PreviousVersionsChecking → TaskMode
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final lazy val logger: ContextAwareLogger
The logger to use for normal and context-aware messages.
The logger to use for normal and context-aware messages.

Attributes
protected
Definition Classes
ContextLogging
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()
val parallelism: Int

Attributes
protected
Definition Classes
ContextAwareMode
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

PreviousVersionsChecking

trait PreviousVersionsChecking extends ContextAwareMode with ContextLogging

Abstract Value Members

Concrete Value Members

Inherited from ContextLogging

Inherited from ContextAwareMode

Inherited from TaskMode

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

PreviousVersionsChecking 

trait PreviousVersionsChecking extends ContextAwareMode with ContextLogging

Abstract Value Members

Concrete Value Members

Inherited from ContextLogging

Inherited from ContextAwareMode

Inherited from TaskMode

Inherited from AnyRef

Inherited from Any

Ungrouped

PreviousVersionsChecking