return array(
'di' => array(
'BookService' => array(
'arguments' => array(
'BookMapper',
),
),
'BookMapper' => array(
'arguments' => array(
'BookCacheRepository',
),
),
'BookCacheRepository' => array(
'arguments' => array(
'BookDbRepository',
),
),
'BookDbRepository' => array(
'arguments' => array(
'TableGateway',
),