Class: Needle::Interceptor::DynamicInterceptor

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

Overview

This is the wrapper for on-the-fly interceptors that have been created via Interceptor#doing. The callback registered with Interceptor#doing gets wrapped by an instance of this class, to comply with the interface required by InterceptorChainBuilder.

This class should rarely (if ever) be instantiated directly. Instead, using the Interceptor#doing method to create dynamic interceptors.

Instance Method Summary collapse

Constructor Details

#initialize(callback) ⇒ DynamicInterceptor

Create a new DynamicInterceptor instance that wraps the given callback.


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# File 'lib/needle/interceptor.rb', line 48

def initialize( callback )
  @callback = callback
end

Instance Method Details

#new(point, opts) ⇒ Object

This method is a concession to the required interceptor factory interface. It should return the new interceptor, configured to be attached to the given service point, and with the given options. It will always return self.


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# File 'lib/needle/interceptor.rb', line 56

def new( point, opts )
  @point = point
  @options = opts
  self
end

#process(chain, context) ⇒ Object

Process this link in the interceptor chain. This will invoke the wrapped callback, passing in the chain and context parameters. Before invoking the callback, the options and service point references that were given in #new are assigned to context data members (so they can be referenced inside the callback).


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# File 'lib/needle/interceptor.rb', line 67

def process( chain, context )
  context.data[:options] = @options
  context.data[:point] = @point
  @callback.call( chain, context )
end