Class: Anemone::Storage::Redis

Inherits:
Object
  • Object
show all
Defined in:
lib/anemone/storage/redis.rb

Constant Summary collapse

MARSHAL_FIELDS = 
%w(links visited fetched)

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Redis

Returns a new instance of Redis.



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# File 'lib/anemone/storage/redis.rb', line 9

def initialize(opts = {})
  @redis = ::Redis.new(opts)
  @key_prefix = opts[:key_prefix] || 'anemone'
  keys.each { |key| delete(key) }
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 15

def [](key)
  rkey = "#{@key_prefix}:pages:#{key.to_s}"
  rget(rkey)
end

#[]=(key, value) ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 20

def []=(key, value)
  rkey = "#{@key_prefix}:pages:#{key.to_s}"
  hash = value.to_hash
  MARSHAL_FIELDS.each do |field|
    hash[field] = Marshal.dump(hash[field])
  end
  hash.each do |field, value|
    @redis.hset(rkey, field, value)
  end
end

#close ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 66

def close
  @redis.quit
end

#delete(key) ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 31

def delete(key)
  rkey = "#{@key_prefix}:pages:#{key.to_s}"
  page = self[key]
  @redis.del(rkey)
  page
end

#each ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 38

def each
  rkeys = @redis.keys("#{@key_prefix}:pages:*")
  rkeys.each do |rkey|
    page = rget(rkey)
    yield page.url.to_s, page
  end
end

#has_key?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/anemone/storage/redis.rb', line 61

def has_key?(key)
  rkey = "#{@key_prefix}:pages:#{key.to_s}"
  @redis.exists(rkey)
end

#keys ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 55

def keys
  keys = []
  self.each { |k, v| keys << k.to_s }
  keys
end

#merge!(hash) ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 46

def merge!(hash)
  hash.each { |key, value| self[key] = value }
  self
end

#size ⇒ Object 



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# File 'lib/anemone/storage/redis.rb', line 51

def size
  @redis.keys("#{@key_prefix}:pages:*").size
end