org.apache.beam.examples.complete.game

Class UserScore

java.lang.Object

org.apache.beam.examples.complete.game.UserScore

Direct Known Subclasses:

HourlyTeamScore

public class UserScore
extends java.lang.Object

This class is the first in a series of four pipelines that tell a story in a 'gaming' domain. Concepts: batch processing, reading input from text files, writing output to text files, using standalone DoFns, use of the sum per key transform, and use of Java 8 lambda syntax.

In this gaming scenario, many users play, as members of different teams, over the course of a day, and their actions are logged for processing. Some of the logged game events may be late- arriving, if users play on mobile devices and go transiently offline for a period.

This pipeline does batch processing of data collected from gaming events. It calculates the sum of scores per user, over an entire batch of gaming data (collected, say, for each day). The batch processing will not include any late data that arrives after the day's cutoff point.

To execute this pipeline, specify the pipeline configuration like this:

 --tempLocation=YOUR_TEMP_DIRECTORY
 --runner=YOUR_RUNNER
 --output=YOUR_OUTPUT_DIRECTORY
 (possibly options specific to your runner or permissions for your temp/output locations)
 

Optionally include the --input argument to specify a batch input file. See the --input default value for example batch data file, or use injector.Injector to generate your own batch data.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	UserScore.ExtractAndSumScore A transform to extract key/score information from GameActionInfo, and sum the scores.
static interface	UserScore.Options Options supported by UserScore.

Constructor Summary

Constructors

Constructor and Description
UserScore()

Method Summary

Modifier and Type	Method and Description
protected static java.util.Map<java.lang.String,WriteToText.FieldFn<org.apache.beam.sdk.values.KV<java.lang.String,java.lang.Integer>>>	configureOutput() Create a map of information that describes how to write pipeline output to text.
static void	main(java.lang.String[] args) Run a batch pipeline.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UserScore

public UserScore()

Method Detail

configureOutput

protected static java.util.Map<java.lang.String,WriteToText.FieldFn<org.apache.beam.sdk.values.KV<java.lang.String,java.lang.Integer>>> configureOutput()

Create a map of information that describes how to write pipeline output to text. This map is passed to the WriteToText constructor to write user score sums.

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Run a batch pipeline.

Throws:

java.lang.Exception