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.

  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 blobstore

  Contains an abstract interface used to access BlobStore.

  Contains an abstract interface used to access BlobStore.

  Obtain the retriever and uploader for a catalog directly from the com.here.platform.data.processing.catalog.Catalog instance.

  Definition Classes

  processing

•  package engine

  Definition Classes

  blobstore

•  package v2

  Contains an implementation used to access BlobStore using DataStore client.

  Contains an implementation used to access BlobStore using DataStore client.

  The retriever using the DataStore client library is Retriever. The uploader using the DataStore client library is Uploader.

  Definition Classes

  engine

• ChecksumVersionIdGenerator
• Digest
• Retriever
• Uploader

com.here.platform.data.processing.blobstore.engine

v2 