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Re: Serializing a non-EO in JSON
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Re: Serializing a non-EO in JSON

  • Subject: Re: Serializing a non-EO in JSON
  • From: Pascal Robert <email@hidden>
  • Date: Thu, 05 May 2011 10:10:09 -0400
I looked at it, and it looked easier to use JSONSerializer in a context where I'm not sending the JSON as part of a REST request (I want to save it to a database). BTW, that's org.jabsorb.JSONSerializer (the one in the Ajax framework).

> any reason you're using JSONSerializer rather than using ERRest json serialization?
>
> ms
>
> On May 5, 2011, at 9:56 AM, Pascal Robert wrote:
>
>> I'm a bit lost here. I'm trying to encode a ERCalendar object in JSON, and I'm getting problems. That object (coming from ERCalendar2) also have a array that contains EREvent objects.
>>
>> So I did that:
>>
>>       JSONSerializer serializer = new JSONSerializer();
>>       serializer.registerDefaultSerializers();
>>       serializer.registerSerializer(new ERXBeanSerializer(EREvent.class));
>>       serializer.registerSerializer(new ERXBeanSerializer(ERCalendar.class));
>>       serializer.registerSerializer(new NSArraySerializer());
>>
>> But I'm getting Java heap space errors (see full stack below).
>>
>> If I don't serialize EREvent, no errors, but the EREvent objects are not serialized. So I guess something make the serializer to go an infinite loop in EREvent, but I don't know what.
>>
>> Any suggestions?
>>
>> Stacktrace:
>>
>> INFO [er.ajax.json.serializer.ERXBeanSerializer] analyzing er.calendar2.ERCalendar
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing net.fortuna.ical4j.model.Calendar
>> ...
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.net.Proxy$Type
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.util.concurrent.TimeUnit$1
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.util.concurrent.TimeUnit$2
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.util.concurrent.TimeUnit$3
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.util.concurrent.TimeUnit$4
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.util.concurrent.TimeUnit$5
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.util.concurrent.TimeUnit$6
>> INFO [org.jabsorb.serializer.impl.BeanSerializer] analyzing java.util.concurrent.TimeUnit$7
>> WARN [NSLog] <com.webobjects.appserver._private.WOComponentRequestHandler>: Exception occurred while handling request:
>> com.webobjects.foundation.NSForwardException [java.lang.reflect.InvocationTargetException] null:java.lang.reflect.InvocationTargetException
>> [2011-5-5 9:1:43 EDT] <WorkerThread0> com.webobjects.foundation.NSForwardException [java.lang.reflect.InvocationTargetException] null:java.lang.reflect.InvocationTargetException
>> 	at com.webobjects.foundation._NSUtilities._explainInstantiationException(_NSUtilities.java:626)
>> 	at com.webobjects.foundation._NSUtilities.instantiateObject(_NSUtilities.java:646)
>> 	at com.webobjects.appserver._private.WOComponentDefinition._componentInstanceInContext(WOComponentDefinition.java:544)
>> 	at com.webobjects.appserver._private.WOComponentDefinition.componentInstanceInContext(WOComponentDefinition.java:642)
>> 	at com.webobjects.appserver.WOApplication.pageWithName(WOApplication.java:2332)
>> 	at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedSession(WOComponentRequestHandler.java:284)
>> 	at com.webobjects.appserver._private.WOComponentRequestHandler._dispatchWithPreparedApplication(WOComponentRequestHandler.java:332)
>> 	at com.webobjects.appserver._private.WOComponentRequestHandler._handleRequest(WOComponentRequestHandler.java:369)
>> 	at com.webobjects.appserver._private.WOComponentRequestHandler.handleRequest(WOComponentRequestHandler.java:442)
>> 	at com.webobjects.appserver.WOApplication.dispatchRequest(WOApplication.java:1687)
>> 	at er.extensions.appserver.ERXApplication.dispatchRequestImmediately(ERXApplication.java:1984)
>> 	at er.extensions.appserver.ERXApplication.dispatchRequest(ERXApplication.java:1949)
>> 	at com.webobjects.appserver._private.WOWorkerThread.runOnce(WOWorkerThread.java:144)
>> 	at com.webobjects.appserver._private.WOWorkerThread.run(WOWorkerThread.java:226)
>> 	at java.lang.Thread.run(Thread.java:680)
>> Caused by: java.lang.reflect.InvocationTargetException
>> 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>> 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>> 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>> 	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>> 	at com.webobjects.foundation._NSUtilities.instantiateObject(_NSUtilities.java:640)
>> 	... 13 more
>> Caused by: java.lang.OutOfMemoryError: Java heap space
>> 	at java.util.LinkedList.toArray(LinkedList.java:863)
>> 	at java.util.ArrayList.<init>(ArrayList.java:131)
>> 	at org.jabsorb.serializer.FixUp.<init>(FixUp.java:57)
>> 	at org.jabsorb.serializer.SerializerState.addFixUp(SerializerState.java:74)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:371)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>>
>> WARN [NSLog] Ran out of memory, killing this instance
>> FATAL [er.extensions.appserver.ERXApplication] Ran out of memory, killing this instance
>> FATAL [er.extensions.appserver.ERXApplication] Ran out of memory, killing this instance
>> java.lang.OutOfMemoryError: Java heap space
>> 	at java.util.LinkedList.toArray(LinkedList.java:863)
>> 	at java.util.ArrayList.<init>(ArrayList.java:131)
>> 	at org.jabsorb.serializer.FixUp.<init>(FixUp.java:57)
>> 	at org.jabsorb.serializer.SerializerState.addFixUp(SerializerState.java:74)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:371)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.ArraySerializer.marshall(ArraySerializer.java:298)
>> 	at org.jabsorb.JSONSerializer.marshall(JSONSerializer.java:385)
>> 	at org.jabsorb.serializer.impl.BeanSerializer.marshall(BeanSerializer.java:235) _______________________________________________
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  • Follow-Ups:
    • Re: Serializing a non-EO in JSON
      • From: Mike Schrag <email@hidden>
References: 
 >Serializing a non-EO in JSON (From: Pascal Robert <email@hidden>)
 >Re: Serializing a non-EO in JSON (From: Mike Schrag <email@hidden>)

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