Erjang

Jéferson Machado So#ware  Design  

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JVM Container

Kresten Krab Thorup

CTO – Responsible for technical strategy, researching future technologies, and JAOO and Qconconferences.

GCC

GNU Objective-C

gcj

Objective-C

Benchmarks

Erlang file

console

File system

Does it work ? •  It  can  boot  Erlang/OTP  to  the  Eshell  (ej  command).  •  There's  a  GUI  console  (ejc  command)  which  supports  ^G  and  line  edi0ng.  

The  console  s0ll  needs  some  work  [Swing  wizards  welcome  here].  •  Run  Erlang  distribu0on,  tcp/ip,  port  commands  (stdio  to  external  

processes).  •  You  can  run  the  compiler  (c(foo)  command  in  the  prompt)  •  It  runs  mnesia  with  distribu0on  across  Erjang/BEAM  nodes.  •  The  HTTP  packet  parsers  are  in  the  tcp/ip  stack,  so  mochiweb  and  

webmachine  can  run  (without  crypto  for  now).  •  Larger  systems  like  rabbitmq  and  riak  can  boot;  and  works  for  basic  

cases  ...  but  it's  not  ready  for  prime  0me  yet.  •  Etc.  etc.  Lot's  of  stuff  work.  

BUT!!! •  A  few  BEAM  instruc0on  are  missing  some  run0me  support.    

•  There  are  also  BIFs  missing,  or  only  par0ally  implemented;  we're  quite  careful  to  throw  @erjang.NotImplemented@  in  BIFs  (or  branches  thereof)  which  are  not  complete.    

•  Many  OTP  modules  need  NIFs  or  linked-­‐in  drivers  that  are  en0rely  missing  or  only  partly  implemented.  

References

•  https://github.com/trifork/erjang

•  http://www.infoq.com/presentations/Erjang-A-JVM-

based-Erlang-VM

•  http://www.javalimit.com/2009/12/erjang-why.html

•  http://learnyousomeerlang.com/contents

Questions ???  

Jéferson Machado So#ware  Design  

Social  network  informa0on  

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https://github.com/jefersonm/ http://slideshare.net/jefersonm