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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: Mike Schrag <email@hidden>
  • Date: Thu, 05 May 2011 10:44:54 -0400
personally, i'd still use ERRest's, but your API is different than mine, so I don't remember how to do it … some form os ERRestFormat.json().toString(…) with a bunch of annoying parameters …

ms

On May 5, 2011, at 10:22 AM, Pascal Robert wrote:

> BTW, I did try to use the one from net.sf.json, but look like I would have to create processors for NSArray and other stuff. Should I use the serializer from net.sf.json?
>
>> actually .. yeah … your version might be slightly more tedious to use … maybe new impl coming.
>>
>> ms
>>
>> On May 5, 2011, at 10:10 AM, Pascal Robert wrote:
>>
>>> 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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References: 
 >Serializing a non-EO in JSON (From: Pascal Robert <email@hidden>)
 >Re: Serializing a non-EO in JSON (From: Mike Schrag <email@hidden>)
 >Re: Serializing a non-EO in JSON (From: Pascal Robert <email@hidden>)
 >Re: Serializing a non-EO in JSON (From: Mike Schrag <email@hidden>)
 >Re: Serializing a non-EO in JSON (From: Pascal Robert <email@hidden>)

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