Collect All EC2 Scheduled events

collect_event.rb

#!/usr/bin/env ruby
# EC2のイベント通知を検出するスクリプト

require 'aws-sdk-v1'
require 'credential_traverser'

require 'thread'

#AWS.config(logger: Logger.new($stdout), log_level: :debug)
CredentialTraverser.traverse do |profile|
  puts profile

  @mutex = Mutex.new

  threads = []
  AWS.regions.count.times do |i|
    threads << Thread::start do
      @mutex.synchronize do
        AWS.config(region: AWS.regions.to_a[i].name)
      end

      ec2 = AWS::EC2.new
      ec2cli = AWS::EC2::Client.new

      AWS.memoize do
        resp = ec2cli.describe_instance_status
        arr = resp.instance_status_set.reject  { |i| i[:events_set].empty? }
                                      .sort_by { |i| ec2.instances[i[:instance_id]].tags.Name }
                                      .map     { |i|
          [ i[:instance_id], ec2.instances[i[:instance_id]].tags.Name,
            i[:events_set][0][:not_before], i[:events_set][0][:not_after]
          ].join(',')
        }
        next if arr.empty?
        puts 'InstanceId,Name,NotBefore,NotAfter'
        puts arr.join("\n")
      end
    end
  end
  threads.count.times do |i|
    threads[i].join
  end
end

スレッドを初めて使ってみた。使い方があっているかわからない。