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"""
Query 12, How many bids does a user make within a fixed processing time limit
(Not in original suite.)
Group bids by the same user into processing time windows of window_size_sec.
Emit the count of bids per window.
"""
import apache_beam as beam
from apache_beam.testing.benchmarks.nexmark.queries import nexmark_query_util
from apache_beam.testing.benchmarks.nexmark.queries.nexmark_query_util import ResultNames
from apache_beam.transforms import trigger
from apache_beam.transforms import window
[docs]def load(events, metadata=None, pipeline_options=None):
return (
events
| nexmark_query_util.JustBids()
| 'query12_extract_bidder' >> beam.Map(lambda bid: bid.bidder)
# windowing with processing time trigger, currently not supported in batch
| beam.WindowInto(
window.GlobalWindows(),
trigger=trigger.Repeatedly(
trigger.AfterProcessingTime(metadata.get('window_size_sec'))),
accumulation_mode=trigger.AccumulationMode.DISCARDING,
allowed_lateness=0)
| 'query12_bid_count' >> beam.combiners.Count.PerElement()
| 'query12_output' >> beam.Map(
lambda t: {
ResultNames.BIDDER_ID: t[0], ResultNames.BID_COUNT: t[1]
}))