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Contents
require 'dalli/client'
module Dalli
class Client
##
# Get the value and CAS ID associated with the key. If a block is provided,
# value and CAS will be passed to the block.
def get_cas(key)
(value, cas) = perform(:cas, key)
value = (!value || value == 'Not found') ? nil : value
if block_given?
yield value, cas
else
[value, cas]
end
end
##
# Fetch multiple keys efficiently, including available metadata such as CAS.
# If a block is given, yields key/data pairs one a time. Data is an array:
# [value, cas_id]
# If no block is given, returns a hash of
# { 'key' => [value, cas_id] }
def get_multi_cas(*keys)
if block_given?
get_multi_yielder(keys) {|*args| yield(*args)}
else
Hash.new.tap do |hash|
get_multi_yielder(keys) {|k, data| hash[k] = data}
end
end
end
##
# Set the key-value pair, verifying existing CAS.
# Returns the resulting CAS value if succeeded, and falsy otherwise.
def set_cas(key, value, cas, ttl=nil, options=nil)
ttl ||= @options[:expires_in].to_i
perform(:set, key, value, ttl, cas, options)
end
##
# Conditionally add a key/value pair, verifying existing CAS, only if the
# key already exists on the server. Returns the new CAS value if the
# operation succeeded, or falsy otherwise.
def replace_cas(key, value, cas, ttl=nil, options=nil)
ttl ||= @options[:expires_in].to_i
perform(:replace, key, value, ttl, cas, options)
end
# Delete a key/value pair, verifying existing CAS.
# Returns true if succeeded, and falsy otherwise.
def delete_cas(key, cas=0)
perform(:delete, key, cas)
end
end
end
Version data entries
11 entries across 9 versions & 2 rubygems