= !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||
||..|| !ConnPool-1 || || || FC||
||..|| Connection conn ->|| ||  || FC||
||..|| || Database.useConnection(conn) ||  || FC||
||..|| || Response = Service.handleRequest() ||  || Application service||
||..|| !ConnPool+1 ||<- Close connection ||  || FC||
||..|| || Send response ->||  || FC||
||'''End'''|| || || Get response || User||