Created
April 7, 2015 16:11
-
-
Save litch/fd5ab4cfc15b918cedda to your computer and use it in GitHub Desktop.
Sample EventStore Consumption
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
require 'http_eventstore' | |
client = HttpEventstore::Connection.new | |
stream_name = 'accounts-002' | |
#event_data = { event_type: "AccountCreated", | |
# data: { phoneNumber: '15128798439' }} | |
#client.append_to_stream(stream_name, event_data) | |
EventData = Struct.new(:data, :event_type) | |
event_data = EventData.new({amount: 1000 }, "DepositCreated") | |
client.append_to_stream(stream_name, event_data) | |
@last_event = 0 | |
@balances = {} | |
def calculate_balances | |
client = HttpEventstore::Connection.new | |
all_accounts_stream_name = '$ce-accounts' | |
events = client.read_events_forward(all_accounts_stream_name, @last_event+1, 1000).reverse | |
events.each do |event| | |
p event | |
if event.type == "AccountCreated" | |
@balances[event.stream_name] = {amount: 0, position: event.id} | |
elsif event.type == "DepositCreated" | |
prev_balance = @balances[event.stream_name][:amount] | |
@balances[event.stream_name] = {amount: prev_balance + event.data['amount'], position: event.id} | |
elsif event.type == "WithdrawalCreated" | |
prev_balance = @balances[event.stream_name][:amount] | |
@balances[event.stream_name] = {amount: prev_balance - event.data['amount'], position: event.id} | |
end | |
@last_event = event.position | |
end | |
@balances | |
end | |
calculate_balances | |
# ?> @balances | |
# => {"accounts-001"=>{:amount=>1000, :position=>5}} | |
def random_withdrawal | |
@client = HttpEventstore::Connection.new | |
p stream_name = "accounts-00#{rand(2)+1}" | |
withdrawal_amount = rand(1000) | |
if @balances[stream_name][:amount] > withdrawal_amount | |
event_data = EventData.new({amount: withdrawal_amount }, "WithdrawalCreated") | |
@client.append_to_stream(stream_name, event_data, @balances[stream_name][:position]) | |
else | |
p "NSF - depositing" | |
event_data = EventData.new({amount: 1000 }, "DepositCreated") | |
@client.append_to_stream(stream_name, event_data) | |
end | |
calculate_balances | |
end | |
n = 100 | |
Benchmark.bm do |x| | |
x.report { n.times {random_withdrawal} } | |
end | |
# 0.270000 0.070000 0.340000 ( 0.665584) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment