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|
# frozen_string_literal: true
require 'mongo'
require 'json'
class StatsAggregator
def initialize
@open_connections = 0
@heartbeats_count = 0
@total_heartbeat_time = 0
@commands_count = 0
@total_command_time = 0
end
def add_command(duration)
@commands_count += 1
@total_command_time += duration
end
def add_heartbeat(duration)
@heartbeats_count += 1
@total_heartbeat_time += duration
end
def add_connection
@open_connections += 1
end
def remove_connection
@open_connections -= 1
end
def average_heartbeat_time
if @heartbeats_count == 0
0
else
@total_heartbeat_time / @heartbeats_count
end
end
def average_command_time
if @commands_count == 0
0
else
@total_command_time / @commands_count
end
end
def reset
@open_connections = 0
@heartbeats_count = 0
@total_heartbeat_time = 0
@commands_count = 0
@total_command_time = 0
end
def result
{
average_heartbeat_time: average_heartbeat_time,
average_command_time: average_command_time,
heartbeats_count: @heartbeats_count,
open_connections: @open_connections,
}
end
end
class CommandMonitor
def initialize(stats_aggregator)
@stats_aggregator = stats_aggregator
end
def started(event); end
def failed(event)
@stats_aggregator.add_command(event.duration)
end
def succeeded(event)
@stats_aggregator.add_command(event.duration)
end
end
class HeartbeatMonitor
def initialize(stats_aggregator)
@stats_aggregator = stats_aggregator
end
def started(event); end
def succeeded(event)
@stats_aggregator.add_heartbeat(event.duration)
end
def failed(event)
@stats_aggregator.add_heartbeat(event.duration)
end
end
class PoolMonitor
def initialize(stats_aggregator)
@stats_aggregator = stats_aggregator
end
def published(event)
case event
when Mongo::Monitoring::Event::Cmap::ConnectionCreated
@stats_aggregator.add_connection
when Mongo::Monitoring::Event::Cmap::ConnectionClosed
@stats_aggregator.remove_connection
end
end
end
$stats_aggregator = StatsAggregator.new
command_monitor = CommandMonitor.new($stats_aggregator)
heartbeat_monitor = HeartbeatMonitor.new($stats_aggregator)
pool_monitor = PoolMonitor.new($stats_aggregator)
sdam_proc = proc do |client|
client.subscribe(Mongo::Monitoring::COMMAND, command_monitor)
client.subscribe(Mongo::Monitoring::SERVER_HEARTBEAT, heartbeat_monitor)
client.subscribe(Mongo::Monitoring::CONNECTION_POOL, pool_monitor)
end
puts 'Connecting'
$client = Mongo::Client.new(ENV['MONGODB_URI'], sdam_proc: sdam_proc)
# Populate the connection pool
$client.use('lambda_test').database.list_collections
puts 'Connected'
def lambda_handler(event:, context:)
db = $client.use('lambda_test')
collection = db[:test_collection]
result = collection.insert_one({ name: 'test' })
collection.delete_one({ _id: result.inserted_id })
response = $stats_aggregator.result.to_json
$stats_aggregator.reset
puts "Response: #{response}"
{
statusCode: 200,
body: response
}
end
|
