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require 'beaneater/stats/fast_struct'
require 'beaneater/stats/stat_struct'
class Beaneater
# Represents stats related to the beanstalkd pool.
class Stats
# @!attribute client
# @return [Beaneater] returns the client instance
attr_reader :client
# Creates new stats instance.
#
# @param [Beaneater] client The beaneater client instance.
# @example
# Beaneater::Stats.new(@client)
#
def initialize(client)
@client = client
end
# Returns keys for stats data
#
# @return [Array<String>] Set of keys for stats.
# @example
# @bp.stats.keys # => ["version", "total_connections"]
#
# @api public
def keys
data.keys
end
# Returns value for specified key.
#
# @param [String,Symbol] key Name of key to retrieve
# @return [String,Integer] Value of specified key
# @example
# @bp.stats['total_connections'] # => 4
#
def [](key)
data[key]
end
# Delegates inspection to the real data structure
#
# @return [String] returns a string containing a detailed stats summary
def inspect
data.to_s
end
alias :to_s :inspect
# Defines a cached method for looking up data for specified key
# Protects against infinite loops by checking stacktrace
# @api public
def method_missing(name, *args, &block)
if caller.first !~ /`(method_missing|data')/ && data.keys.include?(name.to_s)
self.class.class_eval <<-CODE, __FILE__, __LINE__
def #{name}; data[#{name.inspect}]; end
CODE
data[name.to_s]
else # no key matches or caught infinite loop
super
end
end
protected
# Returns struct based on stats data from response.
#
# @return [Beaneater::StatStruct] the stats
# @example
# self.data # => { 'version' : 1.7, 'total_connections' : 23 }
# self.data.total_connections # => 23
#
def data
StatStruct.from_hash(client.connection.transmit('stats')[:body])
end
end # Stats
end # Beaneater
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