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</o:shapelayout></xml><![endif]--></head><body lang=DE-AT link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hi Coders,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>finally i have a first real world project to support my efforts in learning erlang and OTP:<o:p></o:p></p><p class=MsoNormal>Trying to write an application to load-test a Java backend. This java daemon talks json over HTTP (jetty).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The backend requires a login (GET request, no HTTP Authentication), some register stuff for subscriptions<o:p></o:p></p><p class=MsoNormal>and finally a loop to receive all of the events (the step waiting for events is blocking)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So my vision is:<o:p></o:p></p><p class=MsoNormal>- 1x application<o:p></o:p></p><p class=MsoNormal>-- 1x supervisor<o:p></o:p></p><p class=MsoNormal>--- 1x (?) gen_server<o:p></o:p></p><p class=MsoNormal>---- n x Y<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The gen_server should wait for a msg like {start_workers,50} and should then start 50 instances of Y<o:p></o:p></p><p class=MsoNormal>connecting to the java backend, run some httpc:request calls and receive the return values (which is json)<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have really no clear idea which OTP principle can be used for Y, maybe my mindset tells me gen_server is a process to "serve data"<o:p></o:p></p><p class=MsoNormal>and not to ask for data. What would be the best bet ?<o:p></o:p></p><p class=MsoNormal>Or is my simple understanding that Y screams for an gen_fsm including the httpc calls not that wrong ?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Can the supervisor be told to start x instances of Y on request ?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>thx and sorry for my maybe too easy questions.<o:p></o:p></p><p class=MsoNormal>gerald<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>