About Servlet

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Integration

this is what i found to be relevant:  http://www.datanucleus.org/servlet/jira/browse/NUCJPA-22 seems they ran
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New Web Application Tutorials

with basic concepts and principles of Java web applications, including Servlets, JSP and HTML.
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Object belongs to another EntityManager - ERROR

.service(VaadinServlet.java:238) 10:29:15,006 ERROR [stderr] (http--10.23.3.98-8081-5) at javax.servlet
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objectDB for J2me

Hi, can i use objectDB in j2me environment? i succeeded to call a remote DB using "java mobile" via "servlets". how can i do so on ObjectDB? does java mobile (say netBeans) accept / support objectDB? thanks! J2ME is not supported by ObjectDB 2. ObjectDB 1 had support of J2ME CDC (but J2ME CLDC/MIDP
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Once served to JSF page via @EJB query bean, many list fields are null (but same query ok after fresh persist in @PostConstruct)

are no different from that of your own JavaEE tutorial and servlet + query example. The reason the relationships
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Optimistic locking: prevent version increment on entity collection attribute

of my calls to the server is made in a transaction (the entry point in the servlet is annotated
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Problem upgrading

.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.0.28.jar:8.0.28] at org
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Unexpected Internal Exception

Just got this: 13:09:11,309 SCHWERWIEGEND [com.quasado.galaxy.api.servlet.UIApplication] (http--127.0.0.1-8080-7) Critical error:: com.objectdb.o.InternalException: Unexpected internal exception at com.objectdb.o.JPE.h(JPE.java:165) [objectdb-2.4.0.jar:] at com.objectdb.o.ERR.f(ERR.java:70
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UserException - Object User#2 belongs to another EntityManager

(ApplicationFilterChain.java:210) at org.ocpsoft.rewrite.servlet.RewriteFilter.doFilter(RewriteFilter.java:199
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Visibility of changes in Transaction is not visible to a JPA QL Query

I have two simple Entities ( see attachment ) and a simple SLSB with container managed transactions which is called by a trivial servlet. Inside a UserTransaction I add a number of items then check to see that they have been added long newTotal = -1;   try {    InitialContext context = new