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  • Hibernate serialisation failing

    I have multiple sessionFactories, and I am using the spring-flex-core-1.5.0.M2.jar release, but when I try to return an object to the Flex client, I get the following error:

    Code:
    trackitude => [log level: DEBUG] [thread: http-8080-1] [logging time (ms): 154176]
       org.springframework.flex.core.io.SpringPropertyProxy.getValue [line: 85] 
          Actual type of value for property 'dayEntryId' on instance uk.co.prodia.prosoc.domainmodel.HtDayEntry@40b35cf0 is class java.lang.Integer
    
    trackitude => [log level: DEBUG] [thread: http-8080-1] [logging time (ms): 154176]
       org.springframework.flex.core.io.SpringPropertyProxy.getValue [line: 85] 
          Actual type of value for property 'flexDayEntryId' on instance uk.co.prodia.prosoc.domainmodel.HtDayEntry@40b35cf0 is class java.lang.String
    
    trackitude => [log level: DEBUG] [thread: http-8080-1] [logging time (ms): 154176]
       org.springframework.flex.core.io.SpringPropertyProxy.getValue [line: 85] 
          Actual type of value for property 'flexDayLineId' on instance uk.co.prodia.prosoc.domainmodel.HtDayEntry@40b35cf0 is class java.lang.String
    
    trackitude => [log level: DEBUG] [thread: http-8080-1] [logging time (ms): 154176]
       org.springframework.flex.core.io.SpringPropertyProxy.getValue [line: 85] 
          Actual type of value for property 'htDay' on instance uk.co.prodia.prosoc.domainmodel.HtDayEntry@40b35cf0 is class uk.co.prodia.prosoc.domainmodel.HtDay
    
    trackitude => [log level: DEBUG] [thread: http-8080-1] [logging time (ms): 154177]
       org.springframework.flex.core.io.SpringPropertyProxy.getValue [line: 85] 
          Actual type of value for property 'htDayEntryNotes' on instance uk.co.prodia.prosoc.domainmodel.HtDayEntry@40b35cf0 is class org.hibernate.collection.PersistentSet
    
    [BlazeDS]02/11/2011 13:14:36.114 [ERROR] Exception occurred during serialization: org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: uk.co.prodia.prosoc.domainmodel.HtDayEntry.htDayEntryNotes, no session or session was closed
            at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)
            at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372)
            at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365)
            at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108)
            at org.hibernate.collection.PersistentSet.toArray(PersistentSet.java:194)
            at java.util.ArrayList.<init>(ArrayList.java:131)
            at flex.messaging.io.ArrayCollection.<init>(ArrayCollection.java:44)
            at flex.messaging.io.amf.Amf3Output.writeArrayCollection(Amf3Output.java:469)
    It seems to be failing when trying to access the Hibernate proxy. I think Spring/Flex should be setting this value to a null here, but for some reason it isn't.

    Here is my Spring config, I have tried it with and without the ConversionService being defined:

    Code:
    <flex:message-broker>
            <flex:config-processor ref="hibernateConfigProcessor" />
    </flex:message-broker>
    
    <bean id="hibernateConfigProcessor" class="org.springframework.flex.core.io.HibernateConfigProcessor">
           <property name="sessionFactory" ref="sessionFactoryProsoc"/>
           <!--<property name="conversionService" ref="conversionService" />-->
    </bean>
    
    <bean id="conversionService" class="org.springframework.core.convert.support.GenericConversionService"/>
    Hints appreciated.
    Last edited by klogger; Feb 11th, 2011, 08:15 AM.

  • #2
    Bah, I went for lunch and came back and it worked.

    Probably as I upgraded from the snapshot jar to the 1.5M2 release jar, and also commented out the ConversionService that I had defined in my xml file. Jolly marvelous.

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