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module Groonga
class Command
@@classes = {}
class << self
def register_class(name, klass)
@@classes[name] = klass
end
def find_class(name)
@@classes[name]
end
end
private
def context
@context ||= Context.instance
end
def writer
@writer ||= context.writer
end
def query_logger
@query_logger ||= context.query_logger
end
def cache_key(input)
nil
end
def cache_output(key, options={})
if key.nil?
yield
else
cache = Cache.current
cached_value = cache.fetch(key)
if cached_value
context.output = cached_value
query_logger.log(:cache, ":", "cache(#{cached_value.bytesize})")
else
yield
cache.update(key, context.output) if options[:update]
end
end
end
def run_internal(input)
begin
options = {
:update => (input["cache"] != "no"),
}
cache_output(cache_key(input), options) do
run_body(input)
end
rescue GroongaError => groonga_error
context.set_groonga_error(groonga_error)
nil
rescue => error
context.record_error(:command_error, error)
nil
end
end
end
end
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