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Size: 984 Bytes
Versions: 9
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Stored size: 984 Bytes
Contents
# frozen_string_literal: true
module MiniSql
module Abstract
class PreparedCache
DEFAULT_MAX_SIZE = 500
def initialize(connection, max_size = nil)
@connection = connection
@max_size = max_size || DEFAULT_MAX_SIZE
@cache = {}
@counter = 0
end
def prepare_statement(sql)
stm_key = "#{@connection.object_id}-#{sql}"
statement = @cache.delete(stm_key)
if statement
@cache[stm_key] = statement
else
statement = @cache[stm_key] = alloc(sql)
dealloc(@cache.shift.last) if @cache.length > @max_size
end
statement
end
private
def next_key
"s#{@counter += 1}"
end
def alloc(_)
raise NotImplementedError, "must be implemented by specific database driver"
end
def dealloc(_)
raise NotImplementedError, "must be implemented by specific database driver"
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems