What are some examples of using EventMachine in Ruby?

Can you give me some examples of using EventMachine in Ruby?

Sure! EventMachine is a great library for building event-driven applications in Ruby. One common example is creating a simple TCP server.

How do I create a TCP server with EventMachine?

You can create a TCP server using EventMachine like this:

require 'eventmachine'

EM.run do
  EM.start_server '0.0.0.0', 8080, MyServer
end

class MyServer < EM::Connection
  def receive_data(data)
    send_data "You sent: #{data}"
  end
end

What about a simple HTTP server?

For an HTTP server, you can use the em-http-server gem. Here's a basic example:

require 'em-http-server'

class MyHttpServer < EM::Connection
  include EM::HttpServer

  def process_http_request
    send_response 200, 'Hello, World!'
  end
end

EM.run { EM.start_server '0.0.0.0', 8081, MyHttpServer }