Class: Lanes::Configuration

Inherits:
Object
  • Object
show all
Includes:
Lanes::Concerns::AttrAccessorWithDefault
Defined in:
lib/lanes/configuration.rb

Direct Known Subclasses

DefaultConfiguration

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Configuration

Returns a new instance of Configuration.



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# File 'lib/lanes/configuration.rb', line 26

def initialize
    @observers=Hash.new{ |hash,key| hash[key] = Array.new }
end

Class Method Details

.config_option(name, default, options = {}) ⇒ Object

Since changing a config value inadvertently can have pretty drastic consequences that might not be discovered immediately, we log each time a value is changed



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# File 'lib/lanes/configuration.rb', line 12

def self.config_option( name, default, options={} )
    define_method( "#{name}=" ) do | value |
        old_value = self.send( name )
        if old_value && Lanes.logger && !options[:silent]
            Lanes.logger.info "Config option #{name} changed from '#{old_value.inspect}' to '#{value.inspect}'"
        end
        instance_variable_set( "@#{name}", value )
        if @observers.has_key?(name)
            @observers[name].each{ |cb| cb.call(value, old_value) }
        end
    end
    attr_reader_with_default(name, default)
end

Instance Method Details

#get(config, &block) ⇒ Object 



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# File 'lib/lanes/configuration.rb', line 34

def get(config, &block)
    value = self.send(config.to_sym)
    if block
        on_change(config,&block)
        block.call( value, value )
    end
    value
end

#on_change(config, &block) ⇒ Object 



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# File 'lib/lanes/configuration.rb', line 30

def on_change(config, &block)
    @observers[config.to_sym] << block
end