= !FrontController design =

== Request/response database usage (pseudocode) ==

||''Flow in time''||''Layer''||''Layer''||''Layer''||''Who''||
|| ||'''Context'''||'''Session'''||'''Request'''|| ||
||'''Once:'''||!DataSource(!ConnPool=100) or !EntityManagerFactory()|| || || FC init()||
||'''Begin'''|| || ||<- !HttpRequest|| User||
||..|| ||<- !CreateDatabase(Conn=1) or !CreateDatabase(!EntMan) || || FC||
||..|| ||''Subsequent requests: getDatabase, reuse existing connectionless db'' || || FC||
||..|| !GetConnection(1) or !GetEntityManager()|| || || FC||
||..|| Open 1 connection, !ConnPool-1|| || || FC||
||..|| new Database(connection) ->|| ||  || FC||
||..|| ||Database (with credentials and 1 conn)||  || FC||
||..|| || Response = Service.handleRequest() ||  || Application service||
||..|| Close connection, !ConnPool+1|| ||  || FC||
||..|| || Send response ->||  || FC||
||'''End'''|| || || Get response || User||