Question

I am struggling while handling sessions in GAE. I am trying to store a two classes and a string in session. Although on DEV environment it runs fine, on production a class and a string are not being persisted in session. The class that is not getting saved as a session attribute is as follows:

@PersistenceCapable(detachable="true")
public class Agent implements Serializable{
  @PrimaryKey
  @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
  private Long id;

  @Persistent private String name;  //Name of the Agency
  @Element(dependent = "true") 
  private List<Contact> contacts = new ArrayList<Contact>();

  @Element(dependent = "true") 
  private List<Agency> agencies = new ArrayList<Agency>();

  @Persistent private List<Long> subAgents = new ArrayList<Long>();

  @Persistent private Date createdOn = new Date();  
}

I would like to mention again that it works fine on DEV Environment but on production I get values as null. As you can see I have made the class implement Serializable. But I think it is not the problem because I am setting one more attribute as a simple string and that also is failing (I get the attribute value as null). Session however is created as I can see it at the backend and also there is one more class which is persisted in session.

Anybody have suggestions? Thanks in advance.

Answer 1

Making classes Agency and Contact Serializable solves the problem. That mean each and every object (be it nested or otherwise) which is present inside a session attribute should be serializable.