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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.

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 impl

Definition Classes: driver

package executors

Definition Classes: impl

DepCompilerBaseExecutor

DepCompilerExecutor

Direct1ToNCompilerExecutor

DirectCompileFnUtils

DirectMToNCompilerExecutor

ExecutorUtils

IncrementalDepCompilerExecutor

InputCatalogUtils

MapGroupToRefTreeWrapper

MapGroupToRefTreeWrapper1To1

MapGroupToRefTreeWrapper1ToN

MapGroupToRefTreeWrapperBase

NonIncrementalExecutor

OutputCatalogUtils

RefTreeCompilerExecutor

RefTreeUtils

StateCatalogUtils

com.here.platform.data.processing.driver.impl.executors

DirectCompileFnUtils

object DirectCompileFnUtils

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def applyCompileInFn[T](inData: RDD[(InKey, InMeta)], compileIn: CompileInFn[T], executorConfig: ExecutorConfig)(implicit arg0: ClassTag[T]): RDD[(InKey, T)]
Applies the compileInFn of a com.here.platform.data.processing.compiler.direct.CompileInFn to an RDD.
Applies the compileInFn of a com.here.platform.data.processing.compiler.direct.CompileInFn to an RDD.
T
a type of the intermediate data of com.here.platform.data.processing.compiler.direct.CompileInFn, will also be the type of the values of the returned RDD
inData
the input RDD
compileIn
the instance where compileInFn() will be called.
executorConfig
executor config for managing sorting and number of parallel threads used
returns
an RDD, where for all elements of inData the value is replaced with the intermediate value as computed by com.here.platform.data.processing.compiler.direct.CompileInFn.compileInFn
def applyMappingFn[T, V](data: RDD[(InKey, V)], compileIn: CompileInFn[T], outLayerPartitioning: Map[(Id, Id), Scheme], executorConfig: ExecutorConfig)(implicit arg0: ClassTag[T], arg1: ClassTag[V]): RDD[(OutKey, V)]
Applies the mappingFn of a com.here.platform.data.processing.compiler.direct.CompileInFn to the keys of a RDD, and passes the values to the mapped output key.
Applies the mappingFn of a com.here.platform.data.processing.compiler.direct.CompileInFn to the keys of a RDD, and passes the values to the mapped output key.
T
a type of the intermediate data of the compileIn trait com.here.platform.data.processing.compiler.direct.CompileInFn
V
a type of the value of the passed data RDD
data
the input RDD
compileIn
the instance where mappingFn() will be called
returns
an RDD with the mapped output keys as keys, and the values from the input values of data RDD which mapped to these output keys as values. The RDD is not partitioned.
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DirectCompileFnUtils

object DirectCompileFnUtils

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DirectCompileFnUtils 

object DirectCompileFnUtils

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DirectCompileFnUtils