Class: RestCore::Retry

Inherits:
Object
  • Object
show all
Includes:
Middleware
Defined in:
lib/rest-core/middleware/retry.rb

Constant Summary collapse

DefaultRetryExceptions = 
[IOError, SystemCallError]

Constants included from Middleware

Middleware::UNRESERVED

Constants included from RestCore

ASYNC, CLIENT, DRY, FAIL, HIJACK, LOG, PROMISE, REQUEST_HEADERS, REQUEST_METHOD, REQUEST_PATH, REQUEST_PAYLOAD, REQUEST_QUERY, REQUEST_URI, RESPONSE_BODY, RESPONSE_HEADERS, RESPONSE_KEY, RESPONSE_SOCKET, RESPONSE_STATUS, Simple, TIMER, Universal, VERSION

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Middleware

#contain_binary?, contain_binary?, #error_callback, #escape, escape, #fail, #give_promise, #id, included, #log, #merge_hash, merge_hash, percent_encode, #percent_encode, #request_uri, request_uri, #run, string_keys, #string_keys

Methods included from RestCore

eagerload, id

Class Method Details

.members ⇒ Object 



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# File 'lib/rest-core/middleware/retry.rb', line 5

def self.members; [:max_retries, :retry_exceptions]; end

Instance Method Details

#call(env, &k) ⇒ Object 



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# File 'lib/rest-core/middleware/retry.rb', line 10

def call env, &k
  if env[DRY]
    app.call(env, &k)
  else
    app.call(env){ |res| process(res, k) }
  end
end

#process(res, k) ⇒ Object 



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# File 'lib/rest-core/middleware/retry.rb', line 18

def process res, k
  times = max_retries(res)
  return k.call(res) if times <= 0
  errors = retry_exceptions(res) || DefaultRetryExceptions

  if idx = res[FAIL].index{ |f| errors.find{ |e| f.kind_of?(e) } }
    err = res[FAIL].delete_at(idx)
    error_callback(res, err)
    env = res.merge('max_retries' => times - 1)
    give_promise(call(log(
      env, Event::Retrying.new(nil, "(#{times}) for: #{err.inspect}")), &k))
  else
    k.call(res)
  end
end