Class: EventMachine::MultiRequest

Inherits:
Object
  • Object
show all
Includes:
Deferrable
Defined in:
lib/em-http/multi.rb

Overview

EventMachine based Multi request client, based on a streaming HTTPRequest class, which allows you to open multiple parallel connections and return only when all of them finish. (i.e. ideal for parallelizing workloads)

Example

EventMachine.run {

  multi = EventMachine::MultiRequest.new

  # add multiple requests to the multi-handler
  multi.add(:a, EventMachine::HttpRequest.new('http://www.google.com/').get)
  multi.add(:b, EventMachine::HttpRequest.new('http://www.yahoo.com/').get)

  multi.callback {
    p multi.responses[:callback]
    p multi.responses[:errback]

    EventMachine.stop
  }
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MultiRequest

Returns a new instance of MultiRequest.



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# File 'lib/em-http/multi.rb', line 31

def initialize
  @requests  = {}
  @responses = {:callback => {}, :errback => {}}
end

Instance Attribute Details

#requests ⇒ Object (readonly)

Returns the value of attribute requests.



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# File 'lib/em-http/multi.rb', line 29

def requests
  @requests
end

#responses ⇒ Object (readonly)

Returns the value of attribute responses.



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# File 'lib/em-http/multi.rb', line 29

def responses
  @responses
end

Instance Method Details

#add(name, conn) ⇒ Object 



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# File 'lib/em-http/multi.rb', line 36

def add(name, conn)
  raise 'Duplicate Multi key' if @requests.key? name

  @requests[name] = conn

  conn.callback { @responses[:callback][name] = conn; check_progress }
  conn.errback  { @responses[:errback][name]  = conn; check_progress }
end

#finished? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/em-http/multi.rb', line 45

def finished?
  (@responses[:callback].size + @responses[:errback].size) == @requests.size
end