Module: Memcache::Segmented

Included in:
SegmentedNativeServer, SegmentedServer
Defined in:
lib/memcache/segmented.rb

Constant Summary collapse

MAX_SIZE =

bytes

1000000
PARTIAL_VALUE = 
0x40000000

Instance Method Summary collapse

Instance Method Details

#add(key, value, expiry = 0, flags = 0) ⇒ Object 



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# File 'lib/memcache/segmented.rb', line 56

def add(key, value, expiry = 0, flags = 0)
  hash, flags = store_segments(key, value, expiry, flags)
  super(key, hash, expiry, flags) && value
end

#cas(key, value, cas, expiry = 0, flags = 0) ⇒ Object 



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# File 'lib/memcache/segmented.rb', line 49

def cas(key, value, cas, expiry = 0, flags = 0)
  delete(key) do
    hash, flags = store_segments(key, value, expiry, flags)
    super(key, hash, cas, expiry, flags) && value
  end
end

#delete(key) ⇒ Object 



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# File 'lib/memcache/segmented.rb', line 68

def delete(key)
  value  = super_get(key)
  result = block_given? ? yield : super
  if result and segmented?(value)
    segment_keys(value).each {|k| super(k)}
  end
  result
end

#get(keys, cas = nil) ⇒ Object 



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# File 'lib/memcache/segmented.rb', line 8

def get(keys, cas = nil)
  return get([keys], cas)[keys.to_s] unless keys.kind_of?(Array)
  return {} if keys.empty?

  results = super(keys, cas)
  keys = {}
  keys_to_fetch = []
  results.each do |key, value|
    next unless segmented?(value)
    keys[key] = segment_keys(value)
    keys_to_fetch.concat keys[key]
  end

  parts = super(keys_to_fetch)
  keys.each do |key, hashes|
    value = ''
    hashes.each do |hash_key|
      if part = parts[hash_key]
        value << part
      else
        value = nil
        break
      end
    end

    if value
      value.memcache_cas   = results[key].memcache_cas
      value.memcache_flags = results[key].memcache_flags ^ PARTIAL_VALUE
    end
    results[key] = value
  end
  results
end

#replace(key, value, expiry = 0, flags = 0) ⇒ Object 



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# File 'lib/memcache/segmented.rb', line 61

def replace(key, value, expiry = 0, flags = 0)
  delete(key) do
    hash, flags = store_segments(key, value, expiry, flags)
    super(key, hash, expiry, flags) && value
  end
end

#set(key, value, expiry = 0, flags = 0) ⇒ Object 



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# File 'lib/memcache/segmented.rb', line 42

def set(key, value, expiry = 0, flags = 0)
  delete(key) do
    hash, flags = store_segments(key, value, expiry, flags)
    super(key, hash, expiry, flags) && value
  end
end