Module: Regurgitator::ListKeys

Includes:
Domain
Defined in:
lib/regurgitator/list_keys.rb

Overview

:nodoc:

Constant Summary collapse

LIST_KEYS_MAX = 
1000

Instance Method Summary collapse

Methods included from Domain

#domain_init, #get_dmid, #refresh_domain, #refresh_domain_unlocked

Instance Method Details

#list_keys(domain, opts = {}) ⇒ Object 



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# File 'lib/regurgitator/list_keys.rb', line 10

def list_keys(domain, opts = {})
  dmid = get_dmid(domain) or return

  after, limit, prefix = opts[:after], opts[:limit], opts[:prefix]
  limit ||= LIST_KEYS_MAX

  Integer === limit or
    raise ArgumentError, ":limit not an Integer=#{limit.inspect}"

  limit = LIST_KEYS_MAX if limit > LIST_KEYS_MAX
  sql = "SELECT fid,dkey,length,devcount,classid " \
        "FROM file WHERE dmid = #{dmid}"
  prefix and
    sql << " AND dkey LIKE /*! BINARY */ #{@db.literal(prefix+'%'.freeze)}"
  sql << " AND dkey > #{@db.literal(after)}" if after
  sql << " ORDER BY dkey LIMIT #{limit}"

  # we don't enforce collation here, give DBAs some freedom...
  ds = @db[sql]
  block_given? ? ds.each { |row| yield(row) } : ds.to_a
end