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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.
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

SkipIfNoChangesMode

class SkipIfNoChangesMode extends ContextAwareMode with ContextLogging

This TaskMode is used to avoid running a compiler in case it is known that all the input layers of all the input catalogs needed by the compiler haven't changed since the last run. The driver task will simply return nothing to commit, unless the output catalog has composite layers and it is being rebased, in which case it might return some commits to "undo" any undesired base change.

Linear Supertypes

ContextLogging, ContextAwareMode, TaskMode, AnyRef, Any

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SkipIfNoChangesMode
ContextLogging
ContextAwareMode
TaskMode
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Instance Constructors

new SkipIfNoChangesMode(context: DriverContext, id: String, inOut: InputLayers with OutputLayers)
context
the com.here.platform.data.processing.driver.DriverContext relative to this mode
id
the identifier of the com.here.platform.data.processing.driver.DriverTask the mode belongs to, for logging reasons
inOut
the definition of the input/output layers

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(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
val context: DriverContext
Definition Classes
ContextAwareMode
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 isApplicable: Boolean
This mode is only applicable if what's changed is available for every input catalog and no actual changes as present in the input layers needed by the compiler.
This mode is only applicable if what's changed is available for every input catalog and no actual changes as present in the input layers needed by the compiler.
returns
if the mode is applicable, so if the mode should run and its result evaluated
Definition Classes
SkipIfNoChangesMode → 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
@IntrinsicCandidate() @native()
final def notifyAll(): Unit
Definition Classes
AnyRef
Annotations
@IntrinsicCandidate() @native()
val parallelism: Int
Attributes
protected
Definition Classes
ContextAwareMode
def run(): TaskResult
In case the mode is applicable, simply returns nothing to commit.
In case the mode is applicable, simply returns nothing to commit.
returns
nothing to commit, unless the output catalog has composite layers and is being rebased.
Definition Classes
SkipIfNoChangesMode → TaskMode
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

SkipIfNoChangesMode

class SkipIfNoChangesMode extends ContextAwareMode with ContextLogging

Instance Constructors

Value Members

Deprecated Value Members

Inherited from ContextLogging

Inherited from ContextAwareMode

Inherited from TaskMode

Inherited from AnyRef

Inherited from Any

Ungrouped

Packages

SkipIfNoChangesMode

class SkipIfNoChangesMode extends ContextAwareMode with ContextLogging

Instance Constructors

Value Members

Deprecated Value Members

Inherited from ContextLogging

Inherited from ContextAwareMode

Inherited from TaskMode

Inherited from AnyRef

Inherited from Any

Ungrouped

SkipIfNoChangesMode