1. Hibernate: long-lived session coderanch.comScenario: images are stored in the database and retrieved by calling a servlet and passing an id. Using Hibernate, is the answer as simple as creating a session and storing it in my servlet, then continue loading Pictures into it and get a lightening response as previously retrieved images will be cached? ...accept _id as a parameter if (session ==null) createSession(); ... |
2. Long Sessions forum.hibernate.orgCan sessions live long time (one day e.g.)? If I have one standalone aplication where: - In the morning the user Loads the data - The user changes the data (loaded previous) - At the night the user stores the data If I close the session I can not take advantage of the lazy loading. I need lazy loading since my ... |
3. How long are sessions supposed to live? forum.hibernate.orgHello, According to the documentation, Hibernate guarantees id consistency within the same session (one id in the database corresponds to one and only java object - for a particular class). I am building a fat client (swing gui etc), that will talk to a MySQL database through Hibernate, and it seems like a good idea to use a single session with ... |
4. long session and lazyness forum.hibernate.orgI was wondering if there is common solution to my problem with lazy objects. When there is a long process that may run over hours we have many objects that are stored in caches. These objects can have nested objects which are all lazily fetched. This means that I either have to hold a session open indefinately so these lazy properties ... |
5. Why it takes so long to build session factory? forum.hibernate.org2006-04-18 10:56:29,909 INFO [main] impl.SessionFactoryImpl: building session factory 2006-04-18 10:56:32,221 INFO [main] impl.SessionFactoryObjectFactory: Factory name: inventory 2006-04-18 10:56:32,221 INFO [main] util.NamingHelper: JNDI InitialContext properties:{} 2006-04-18 10:56:32,221 WARN [main] impl.SessionFactoryObjectFactory: Could not bind factory to JNDI javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: ... |
6. Managing long-lived Sessions optimistically forum.hibernate.orgI wanted to confirm with the community a conclusion I've come to about long-lived Sessions, following the Session-per-App-Transaction pattern. In a nutshell, this is that applications are expected to manage Sessions "optimisitically" -- do not repeatedly check if persistent objects in the Session are stale (inconsistent with the database state) but rather assume they're up to date. This is analogous to ... |
7. How can I access an object inside long session forum.hibernate.orgI am trying to use the long session approach to implement application transaction, so my question is how can I reload an obejct asociated with that session: class 1{ ... session.save(order); session.disconnect(); request.getSession().setAttribute("longSession", session) ; ..... } class 2 { ... Session session = (Session) request.getSession().getAttribute("longSession") ; session.reconnect(); // how to get order object again? // something like session.getObject(order,orderId) or something? ... |
8. Error using long term sessions forum.hibernate.orgHi, i have the following problem. I use a hibernate-session to load an object (i.e. the object of a user that enters my web-application). For this object i have lazy-fetching activated so i keep the session alive to be able to fetch joined objects later. Then i store that object in a http-session. At some stage in my application i make ... |
9. CaveatEmptor and long session forum.hibernate.orgBeginner Joined: Fri Aug 20, 2004 3:45 pm Posts: 22 Location: Florence - ITALY I've solve my problem with LongSessionFilter, so I want to share with forum. This in my Filter code: Code: public class HibernateFilterLong implements Filter { private static Log log = LogFactory.getLog(HibernateFilterLong.class); private static ... |
10. Stale data with long running session forum.hibernate.orgHibernate version: 3 Mapping documents: NA Code between sessionFactory.openSession() and session.close(): NA Full stack trace of any exception that occurs: NA Name and version of the database you are using: NA The generated SQL (show_sql=true): NA Debug level Hibernate log excerpt: NA I am using hibernate within a web application. The requirements state that I must use the users Oracle account ... |
11. Long session drawbacks? forum.hibernate.orgWhat are the drawbacks to leaving a Hibernate Session open for a really long time? I'm working on a DB-backed DESKTOP app (using Java SE 5, not a web app, not Java EE) that constantly needs to gather more info from the DB as the user decides to look at various screens, etc. The biggest place where this occurs is in ... |
12. SessionFactory init takes too long forum.hibernate.orgSessionFactory implements Serializable, so you should be able to save it - I was contemplating doing just that, but did not try it yet. What discouraged me was the fact that I would have to watch not only for changes in all my mapping files, BUT also for any object implementation file changes - SessionFactory uses CGLIB to generate code from ... |