Source code for apache_beam.testing.benchmarks.nexmark.queries.query1

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"""Nexmark Query 1: Convert bid prices from dollars to euros.

The Nexmark suite is a series of queries (streaming pipelines) performed
on a simulation of auction events.

This query converts bid prices from dollars to euros.
It illustrates a simple map.
"""
from __future__ import absolute_import

import apache_beam as beam
from apache_beam.testing.benchmarks.nexmark.models import nexmark_model
from apache_beam.testing.benchmarks.nexmark.nexmark_util import ParseEventFn
from apache_beam.testing.benchmarks.nexmark.nexmark_util import display


[docs]def load(raw_events, query_args=None): return (raw_events | 'ParseEventFn' >> beam.ParDo(ParseEventFn()) | 'FilterInBids' >> beam.Filter( lambda event: isinstance(event, nexmark_model.Bid)) | 'ConvertToEuro' >> beam.Map( lambda bid: nexmark_model.Bid( bid.auction, bid.bidder, (float(bid.price) * 89) // 100, bid.timestamp, bid.extra)) | 'DisplayQuery1' >> beam.Map(display) ) # pylint: disable=expression-not-assigned