Class: Direct::ExceptionHandler

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

Overview

This class monitors exception types with related blocks.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ExceptionHandler

Returns a new instance of ExceptionHandler.



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# File 'lib/direct/exception_handler.rb', line 4

def initialize
  @handlers = {}
end

Instance Method Details

#call(deferred, exception, object) ⇒ Object

This will find the first handler given to ‘monitor` which matches the provided exception’s class and will execute it with the deferred object, the exception object, and any given object to the deferred object.



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# File 'lib/direct/exception_handler.rb', line 24

def call(deferred, exception, object)
  if_none = proc { raise "No handler for this exception: #{exception.class}!" }
  result = @handlers.find { |key, val| key.include?(exception.class) }
  if result.nil?
    result = @handlers.find(if_none) do |key, val|
      key.find { |klass| exception.class < klass }
    end
  end

  result.last.call(deferred, exception, object)
end

#classes ⇒ Object

All classes, including StandardError, for which this object maintains a block to execute.



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# File 'lib/direct/exception_handler.rb', line 10

def classes
  [StandardError, @handlers.keys.flatten].flatten
end

#monitor(*classes, &block) ⇒ Object

Pass a single or multiple exception classes and the block to be used to handle them.



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# File 'lib/direct/exception_handler.rb', line 16

def monitor(*classes, &block)
  @handlers[classes.flatten] = block
end