Class: Guillotine::MemoryAdapter

Inherits:
Adapter
  • Object
show all
Defined in:
lib/guillotine/adapters/memory_adapter.rb

Overview

Stores shortened URLs in memory. Totally scales.

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Adapter

#get_code, #parse_url, #shorten, #shorten_fixed_charset

Constructor Details

#initialize ⇒ MemoryAdapter

Returns a new instance of MemoryAdapter.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 5

def initialize
  reset
end

Instance Attribute Details

#hash ⇒ Object (readonly)

Returns the value of attribute hash.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 4

def hash
  @hash
end

#urls ⇒ Object (readonly)

Returns the value of attribute urls.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 4

def urls
  @urls
end

Instance Method Details

#add(url, code = nil, options = nil) ⇒ Object

Public: Stores the shortened version of a URL.

url - The String URL to shorten and store. code - Optional String code for the URL. options - Optional Guillotine::Service::Options

Returns the unique String code for the URL. If the URL is added multiple times, this should return the same code.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 17

def add(url, code = nil, options = nil)
  if existing_code = @urls[url]
    existing_code
  else
    code = get_code(url, code, options)

    if existing_url = @hash[code]
      raise DuplicateCodeError.new(existing_url, url, code) if url != existing_url
    end
    @hash[code] = url
    @urls[url]  = code
    code
  end
end

#clear(url) ⇒ Object

Public: Removes the assigned short code for a URL.

url - The String URL to remove.

Returns nothing.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 55

def clear(url)
  if code = @urls.delete(url)
    @hash.delete code
  end
end

#clear_code(code) ⇒ Object

Public: Removes the assigned short code.

code - The String code to remove.

Returns nothing.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 66

def clear_code(code)
  if url = @hash.delete(code)
    @urls.delete(url)
  end
end

#code_for(url) ⇒ Object

Public: Retrieves the code for a given URL.

url - The String URL to lookup.

Returns the String code, or nil if none is found.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 46

def code_for(url)
  @urls[url]
end

#find(code) ⇒ Object

Public: Retrieves a URL from the code.

code - The String code to lookup the URL.

Returns the String URL, or nil if none is found.



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 37

def find(code)
  @hash[code]
end

#reset ⇒ Object 



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# File 'lib/guillotine/adapters/memory_adapter.rb', line 72

def reset
  @hash = {}
  @urls = {}
end