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"""Nexmark model.
The nexmark suite is a series of queries (streaming pipelines) performed
on a simulation of auction events. The model includes the three roles that
generate events:
- The person who starts and auction or makes a bid (Person).
- The auction item (Auction).
- The bid on an item for auction (Bid).
"""
[docs]class Person(object):
"Author of an auction or a bid."
def __init__(self, id, name, email, credit_card,
city, state, timestamp, extra=None):
self.id = id
self.name = name
self.email = email # key
self.credit_card = credit_card
self.city = city
self.state = state
self.timestamp = timestamp
self.extra = extra
def __repr__(self):
return 'Person({id}, {email})'.format(**{'id': self.id,
'email': self.email})
[docs]class Auction(object):
"Item for auction."
def __init__(self, id, item_name, description, initial_bid, reserve_price,
timestamp, expires, seller, category, extra=None):
self.id = id
self.item_name = item_name # key
self.description = description
self.initial_bid = initial_bid
self.reserve_price = reserve_price
self.timestamp = timestamp
self.expires = expires
self.seller = seller
self.category = category
self.extra = extra
def __repr__(self):
return 'Auction({id}, {item_name})'.format(**{'id': self.id,
'item_name': self.item_name})
[docs]class Bid(object):
"A bid for an item for auction."
def __init__(self, auction, bidder, price, timestamp, extra=None):
self.auction = auction # key
self.bidder = bidder
self.price = price
self.timestamp = timestamp
self.extra = extra
def __repr__(self):
return 'Bid({auction}, {bidder}, {price})'.format(
**{'auction': self.auction,
'bidder': self.bidder,
'price': self.price})