msgpack-java and ConcurrentHashMap

[Ilya Volodarsky]

Can someone show me how to serialize ConcurrentHashMap?

msgPack = new MessagePack();

msgPack.register(ConcurrentHashMap.class);

gives:

org.msgpack.MessageTypeException: org.msgpack.template.builder.TemplateBuildException: Cannot compile: 

    {

      if (!$3 && $1.trySkipNil()) {

        return null;

      }

      java.util.concurrent.ConcurrentHashMap _$$_t;

      if ($2 == null) {

        _$$_t = new java.util.concurrent.ConcurrentHashMap();

      } else {

        _$$_t = (java.util.concurrent.ConcurrentHashMap) $2;

      }

      $1.readArrayBegin();

      $1.readArrayEnd();

      return _$$_t;

    }

        at org.msgpack.template.TemplateRegistry.buildAndRegister(TemplateRegistry.java:516)

        at org.msgpack.template.TemplateRegistry.register(TemplateRegistry.java:154)

        at org.msgpack.MessagePack.register(MessagePack.java:572)

        at com.sio.msgpack.MessagePackUtils.initializeMessagePack(MessagePackUtils.java:30)

        at com.sio.msgpack.MessagePackUtils.getMessagePack(MessagePackUtils.java:22)

        at com.sio.msgpack.cube.CubeSerializationTest.serializationTest(CubeSerializationTest.java:46)

        Caused by:

        org.msgpack.template.builder.TemplateBuildException: Cannot compile: 

        {

          if (!$3 && $1.trySkipNil()) {

            return null;

          }

          java.util.concurrent.ConcurrentHashMap _$$_t;

          if ($2 == null) {

            _$$_t = new java.util.concurrent.ConcurrentHashMap();

          } else {

            _$$_t = (java.util.concurrent.ConcurrentHashMap) $2;

          }

          $1.readArrayBegin();

          $1.readArrayEnd();

          return _$$_t;

        }

            at org.msgpack.template.builder.BuildContext.build(BuildContext.java:73)

            at org.msgpack.template.builder.DefaultBuildContext.buildTemplate(DefaultBuildContext.java:56)

            at org.msgpack.template.builder.JavassistTemplateBuilder.buildTemplate(JavassistTemplateBuilder.java:118)

            at org.msgpack.template.builder.AbstractTemplateBuilder.buildTemplate(AbstractTemplateBuilder.java:61)

            at org.msgpack.template.TemplateRegistry.buildAndRegister(TemplateRegistry.java:503)

            ... 5 more

            Caused by:

            javassist.CannotCompileException: by java.lang.SecurityException: Prohibited package name: java.util.concurrent

                at javassist.ClassPool.toClass(ClassPool.java:1099)

                at javassist.CtClass.toClass(CtClass.java:1181)

                at org.msgpack.template.builder.BuildContext.createClass(BuildContext.java:154)

                at org.msgpack.template.builder.BuildContext.build(BuildContext.java:68)

                ... 9 more

                Caused by:

                java.lang.SecurityException: Prohibited package name: java.util.concurrent

                    at java.lang.ClassLoader.preDefineClass(ClassLoader.java:645)

                    at java.lang.ClassLoader.defineClass(ClassLoader.java:781)

                    at java.lang.ClassLoader.defineClass(ClassLoader.java:630)

                    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

                    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)

                    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

                    at java.lang.reflect.Method.invoke(Method.java:601)

                    at javassist.ClassPool.toClass2(ClassPool.java:1112)

                    at javassist.ClassPool.toClass(ClassPool.java:1093)

                    ... 12 more

Thanks,

Ilya

[Ilya Volodarsky]

Answer here: https://github.com/msgpack/msgpack-java/issues/20

Thanks Muga!