ejb head first ejb computing java enterprise platform enterprise javabean entity bean agile mysql postgresql rails ruby ruby on rails cross-platform software oracle database apache http server lighttpd activerecord (rails) the pragmatic programmer openlink rails odbc adapter java pragmatic project java (software platform) apache ant computer programmers concurrent versions system open source software andy hunt (author) dave thomas (programmer) javascript software engineering web 2.0 computer programming web application frameworks scripting languages javascript programming language tigermouse asp.net soap web services web development world wide web web services invocation framework universal description discovery and integration web services discovery web services description language green pages (uddi) david heinemeier hansson bates