Updating in a REQUIRES_NEW then finding in a different transaction returns old data. Why?
This question is best described by a picture I think. I hope someone can help me. Thanks ...
java-ee
JPA and compatibility with persistance providers and databases vendors
JPA promises to be vendor neutral for persistence and database. But I already know than some persistence frameworks like hibernate are not perfect (character encoding, null comparison) and you need to adapt your schema for each database. Because there is two layers (the persistence framework and database), I would imagine they're some wo...
Servlet requests are executed sequentially for no apparent reason in Glassfish v3
Hi, I'm using Glassfish 3 Web profile and can't get http workers to execute concurrently requests on a servlet. This is how i observed the problem. I've made a very simple servlet, that writes the current thread name to the standard output and sleep for 10 seconds : protected void doGet(HttpServletRequest request, HttpServletResponse...
Accessing Java Connector Architecture (JCA) from a Non-Managed environment
Hi, We have been using a JCA to interface with a low-level network resource from within WebSphere, however we have a requirement to be able to access the same network resource externally from Tomcat (i.e. not in a managed environment). The network communication and protocol layouts is very verbose, so we would rather not copy/paste sev...
How to handle large dataset with JPA (or at least with Hibernate)?
I need to make my web-app work with really huge datasets. At the moment I get either OutOfMemoryException or output which is being generated 1-2 minutes. Let's put it simple and suppose that we have 2 tables in DB: Worker and WorkLog with about 1000 rows in the first one and 10 000 000 rows in the second one. Latter table has several fi...
J2EE fast track (Learning Enterprise Java real fast)
Hello, We just started a new project in J2EE in our office and i am required to participate effectively. I mostly work on web applications and I use PHP/MySql but I also know J2SE and have written couple of standalone applications. I need help and advise on how i can learn J2ee very fast so that i can blend into the project without diff...
Possible to access remote EJBs from a custom LoginModule?
I found some nice hints on how to write a custom realm and loginModule. I'm wondering though if it is possible to access a remote EJB within the custom loginModule. In my case, I have remote EJBs that provide access to user-entities (via JPA) -- can I use them (e.g. via @EJB annotation)? ...
How to introduce 'Remember me' checkbox to existing project with Spring Security?
I have a pretty standard project with Spring Security. I have a login form and I need to add 'Remember me' checkbox there. How can I do that? I can provide some code if necessary. ...
What kind of data structure shall i use for handling huge data
I am parsing huge xhtml files and am trying to play around with the content in it. Basically the words in it, their positions etc. I tried using the HashMap, ArayList etc. All of them give OutOfMemory issue after loading 130347 data. What is the kind of data structure that can be used to hold huge data in JAVA. ...
how can I invoke a webservice from another webservice
I have two webservices A and B. A needs to invoke one of the webMethods in B. How can I achieve this? I am using maven's wsimport plugin to build A. This is to generate the necessary stubs for B and include them as part of the Webservice A. However, when I try to Invoke the webmethod o f B, I get an Exception. Can anyone please tell me w...
Test-Driven Development Problem
Hi guys, I'm newbie to Java EE 6 and i'm trying to develop very simple JAX-RS application. RESTfull web service working fine. However when I ran my test application, I got the following. What have I done wrong? Or am i forget any configuration? Of course i'm create a JNDI and i'm using Netbeans 6.8 IDE. In finally, thank you for any adv...
Regarding jdbc Realm
I want to do login using form based authentication. i have been followed all steps for creating jdbc realm but run time error is coming. error is like-SEVERE: SEC1111: Cannot load group for JDBC realm user [pqr]. WARNING: Web login failed: Login failed: javax.security.auth.login.LoginException: Security Exception ...
Glassfish 3: How do I get and use a developers build so I can navigate a stack trace including Glassfish code?
I am migrating a JSF 1.1 application to JEE 6 Web profile, and doing it in steps. I am in the process of moving from JSP with JSF 1.1 to Facelets under JSF 1.2 using the jsf-facelets.jar for JSF 1.2, and received an "interesting" stack trace when trying to lookup a key in a Map using a "{Bean.foo.map.key}" where the stacktrace complaine...
Java EE javax.xml.bind.MarshalException
Hi, I am getting javax.xml.bind.MarshalException error. I am sending List from my webservice to the backingbean and I have this error. WARNING: invocation error on ejb endpoint Login_webservice at /Login_webserviceService/Login_webservice : javax.xml.bind.MarshalException - with linked exception: [javax.xml.bind.JAXBException: class JP...
Implementing OAuth protocol in Java
Hi all , I'm looking for an open source library that implements the OAuth protocol , I need the server side implementation . Say I have a Social network system , and I want to give my users an OAth abiliy to my API , like facebook. Do you have any suggestion , sure examples . Thanks in advance ... ...
new Stateful session bean instance without calling lookup
Scenario: I have @Singleton UserFactory (@Stateless could be) , its method createSession() generating @Stateful UserSession bean by manual lookup. If I am injecting by DI @EJB - i will get same instance during calling fromFactory() method(as it should be) What I want - is to get new instance of UserSession without preforming lookup. ...
What should I learn to improve my Java skills ?
Hello, I currently know Java SE and I want to learn something more 'enterprise'. I would like something more distributed (app server, server programming, web, content management system ...) but any suggestion is ok. There are many frameworks which I've heard: spring, hibernate, persistence, ejb, jsp, servlet, jsf, jboss, glassfish,...
Java moderation workflow
I have a moderation application with more than one moderators. Instead of all moderator getting the same list of messages to moderate and creating possible collisions (moderating the same message, and waste time), is there a way to send a unique list of messages to each moderator and allow for messages not moderated in a given time to be...
Java EE Website Planning Questions
I'm a .NET programmer who is soon moving to the Java EE world. I have plenty of experience with .NET web technologies, web services, WebForms and MVC. I am also very familiar with the Java language, and have written a few servlets and modified a couple of JSP pages, but I haven't touched EE yet. I'd like to set up a public website usi...
How does 'binding' in JSF work?
I've created custom component which shows chart. Now I need to make binding support for this component i.e. generated chart-image should be available (as array of bytes) to backing bean via binding mechanism. I'd like to know some general info about binding implementation techniques. Any links and examples are welcome as well. Thanks...