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package root
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root
package com
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root
package here
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com
package platform
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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 exception
Definition Classes
processing
ContextRuntimeException
ExceptionContainer
Implicits

com.here.platform.data.processing.exception

ContextRuntimeException

Companion object ContextRuntimeException

class ContextRuntimeException extends RuntimeException

Models a RuntimeException that also records the context in which it was thrown.

The context is stored in the exception message together with the message itself (if any) sent by the user.

Raise this exception to terminate the application. You should catch recoverable exceptions inside the functions, instead of propagating them to the processing library. If an exception needs to be propagated, consider wrapping it in ContextRuntimeException to aid with tracking and debugging. Any uncaught exception stops the processing and aborts the commit to the output catalog.

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new ContextRuntimeException(logContext: LogContext, message: Option[String], cause: Option[Throwable], isEnableSuppression: Boolean, isWritableStackTrace: Boolean)
logContext
the context in which the exception is raised
message
the exception message
cause
the exception cause
isEnableSuppression
suppression flag
isWritableStackTrace
writable stack trace flag
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Deprecated
(Since version 9)

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ContextRuntimeException

Companion object ContextRuntimeException

class ContextRuntimeException extends RuntimeException

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ContextRuntimeException

Companion object ContextRuntimeException

class ContextRuntimeException extends RuntimeException

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ContextRuntimeException