Class: Tretry

Inherits:
Object
  • Object
show all
Defined in:
lib/tretry.rb

Overview

A library for doing retries in Ruby with timeouts, analysis of errors, waits between tries and more.

Defined Under Namespace

Classes: Result

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(errors: nil, exit: true, interrupt: true, return_error: nil, timeout: nil, tries: 3, wait: nil) ⇒ Tretry

Returns a new instance of Tretry.



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# File 'lib/tretry.rb', line 19

def initialize(errors: nil, exit: true, interrupt: true, return_error: nil, timeout: nil, tries: 3, wait: nil)
  self.errors = errors
  self.exit = exit
  self.fails = []
  self.interrupt = interrupt
  @before_retry = []
  self.return_error = return_error
  self.timeout = timeout
  self.tries = tries
  self.wait = wait
end

Instance Attribute Details

#error ⇒ Object

Returns the value of attribute error.



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# File 'lib/tretry.rb', line 5

def error
  @error
end

#errors ⇒ Object

Returns the value of attribute errors.



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# File 'lib/tretry.rb', line 5

def errors
  @errors
end

#exit ⇒ Object

Returns the value of attribute exit.



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# File 'lib/tretry.rb', line 5

def exit
  @exit
end

#fails ⇒ Object

Returns the value of attribute fails.



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# File 'lib/tretry.rb', line 5

def fails
  @fails
end

#interrupt ⇒ Object

Returns the value of attribute interrupt.



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# File 'lib/tretry.rb', line 5

def interrupt
  @interrupt
end

#return_error ⇒ Object

Returns the value of attribute return_error.



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# File 'lib/tretry.rb', line 5

def return_error
  @return_error
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/tretry.rb', line 5

def timeout
  @timeout
end

#tries ⇒ Object

Returns the value of attribute tries.



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# File 'lib/tretry.rb', line 5

def tries
  @tries
end

#wait ⇒ Object

Returns the value of attribute wait.



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# File 'lib/tretry.rb', line 5

def wait
  @wait
end

Class Method Details

.try(**args, &block) ⇒ Object

Runs a block of code a given amount of times until it succeeds.

Examples

res = Tretry.try(:tries => 3) do
   #something that often fails
end

puts "Tries: '#{res[:tries]}'."
puts "Result: '#{res[:result}'."



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# File 'lib/tretry.rb', line 15

def self.try(**args, &block)
  Tretry.new(**args).try(&block)
end

Instance Method Details

#before_retry(&block) ⇒ Object 



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# File 'lib/tretry.rb', line 31

def before_retry(&block)
  @before_retry << block
end

#try(&block) ⇒ Object

rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity



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# File 'lib/tretry.rb', line 35

def try(&block) # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/PerceivedComplexity
  raise "No block given." unless block

  @block = block

  tries.times do |count|
    @count = count

    unless first_try?
      # Sleep for a given amount of time if the 'wait'-argument is given.
      sleep(wait) if wait

      call_before_retry(error: error)
      self.error = nil
    end

    begin
      # If a timeout-argument has been given, then run the code through the timeout.
      if timeout
        try_with_timeout
      else
        # Else call block normally.
        @res = @block.call
        @dobreak = true
      end
    rescue Exception => e # rubocop:disable Lint/RescueException
      handle_error(e)
    end

    if @doraise
      if return_error
        fails << {error: error}

        return Tretry::Result.new(
          fails: fails,
          error: true
        )
      end

      raise error
    elsif error
      fails << {error: error}
    end

    break if @dobreak
  end

  Tretry::Result.new(
    fails: fails,
    result: @res,
    error: false
  )
end