File an issue for this please. I think we could make Java arrays trivially serializable by giving them named classes rather than anonymous classes.
A possible workaround might be this: $ jirb irb(main):001:0> bytes = 'foo'.to_java_bytes => byte[102, 111, 111]@c5a311d irb(main):002:0> bytes.class => #<Class:0x3fd9af48> irb(main):003:0> ByteArray = bytes.class => ByteArray irb(main):004:0> bytes.class => ByteArray irb(main):005:0> Marshal.dump(bytes) => "\x04\bU:\x0EByteArray\"#\xAC\xED\x00\x05ur\x00\x02[B\xAC\xF3\x17\xF8\x06\bT\xE0\x02\x00\x00xp\x00\x00\x00\x03foo" There's a bit more fiddling around to get this to properly enlist in Java serialization + marshaling, but it's not far off. - Charlie On Tue, Jul 16, 2013 at 11:02 AM, Rodrigo Rosenfeld Rosas <rr.ro...@gmail.com> wrote: > I've just published an article on how I'm using DRb to command JRuby from > MRI: > > http://rosenfeld.herokuapp.com/en/articles/ruby-rails/2013-07-16-running-java-from-mri-ruby-through-drb > > I'd appreciate any feedbacks on how to avoid the mentioned warning, since I > need to include that DRb::DRbUndumped module, at least for byte arrays. > > Thanks in advance, > Rodrigo. > > Em 16-07-2013 07:57, Rodrigo Rosenfeld Rosas escreveu: > >> if I extend the byte[] with DRb::DRbUndumped it works but I get a warning >> in the server application: >> >> server.rb:9 warning: singleton on non-persistent Java type >> #<Class:0x4d7c1b64> (http://wiki.jruby.org/Persistence) >> >> Em 16-07-2013 07:44, Rodrigo Rosenfeld Rosas escreveu: >>> >>> Why isn't it possible to pass byte[] back to JRuby DRb server? I believe >>> it should be passed by reference, right? >>> >>> Here's an example code: >>> >>> server.rb >>> require 'drb/drb' >>> >>> class Service >>> def to_java_bytes(str) >>> str.to_java_bytes >>> end >>> >>> def from_java_bytes(bytes) >>> String.from_java_bytes bytes >>> end >>> end >>> >>> service = Service.new >>> >>> p service.from_java_bytes service.to_java_bytes 'Test' >>> >>> DRb.start_service "druby://localhost:8787", Service.new >>> >>> DRb.thread.join >>> >>> >>> client.rb >>> require 'drb/drb' >>> >>> DRb.start_service >>> >>> service = DRbObject.new_with_uri "druby://localhost:8787" >>> >>> p service.from_java_bytes service.to_java_bytes 'Test' >>> >>> >>> Running the client with JRuby, I get this stacktrace: >>> >>> TypeError: can't retrieve anonymous class #<Class:0x2b753bb9> >>> load at org/jruby/RubyMarshal.java:148 >>> load at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:626 >>> synchronize at org/jruby/ext/thread/Mutex.java:149 >>> load at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:622 >>> recv_reply at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:674 >>> recv_reply at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:959 >>> send_message at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1238 >>> method_missing at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1129 >>> open at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1213 >>> method_missing at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1128 >>> with_friend at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1146 >>> method_missing at >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1127 >>> (root) at client.rb:7 >>> >>> Running with MRI 2.0.0 I get this stacktrace: >>> >>> (druby://localhost:8787) org/jruby/RubyMarshal.java:148:in `load': can't >>> retrieve anonymous class #<Class:0x2b753bb9> (TypeError) >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:530:in `_load' >>> from (druby://localhost:8787) org/jruby/RubyMarshal.java:148:in >>> `load' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:626:in `load' >>> from (druby://localhost:8787) >>> org/jruby/ext/thread/Mutex.java:149:in `synchronize' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:622:in `load' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:660:in >>> `recv_request' >>> from (druby://localhost:8787) org/jruby/RubyFixnum.java:285:in >>> `times' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:659:in >>> `recv_request' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:949:in >>> `recv_request' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1564:in >>> `init_with_client' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1576:in >>> `setup_message' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1528:in >>> `perform' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1627:in >>> `main_loop' >>> from (druby://localhost:8787) org/jruby/RubyKernel.java:1489:in >>> `loop' >>> from (druby://localhost:8787) >>> /home/rodrigo/.rvm/rubies/jruby-1.7.4/lib/ruby/1.9/drb/drb.rb:1623:in >>> `main_loop' >>> from client.rb:7:in `<main>' >>> >>> Is there any work-around that would allow me to pass byte[] back to the >>> server? >>> >>> Thanks in advance, >>> Rodrigo. >>> >> > > > --------------------------------------------------------------------- > To unsubscribe from this list, please visit: > > http://xircles.codehaus.org/manage_email > > --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email
