seam

Quick version: We're looking for a way to force a transaction to rollback when specific situations occur during the execution of a method on a backing bean but we'd like the rollback to happen without having to show the user a generic 500 error page. Instead, we'd like the user to see the form she just submitted and a FacesMessage that indicates what the problem was. Long version: We've got a few backing beans that use components to perform a few related operations in the database (using JPA/Hibernate). During the process, an error can occur after some of the database operations have happened.

What is the best mechanism for preventing constraint violation checks before creation | modification of an entity? Suppose if the 'User' entity has 'loginid' as the unique constraint, would it be wise to check if there is an user entry already with this loginid name before creation or modification. OR Would you let the database throw an ConstraintViolationException and handle this message appropriately in the UI layer. Where should such checks be enforced in the jboss seam framework. Note: Currently no such checks are enforced on the seam-gen code. We currently use Seam 2.2, Richfaces with

I have a big problem with Hibernate (use with seam) on weblogic 10.3. When I publish my application, I get this error: java.lang.NoSuchMethodException: org.hibernate.validator.ClassValidator.<init>(java.lang.Class, java.util.ResourceBundle, org.hibernate.validator.MessageInterpolator, java.util.Map, org.hibernate.annotations.common.reflection.ReflectionManager) I read on the web that this error can come from compatibily between hibernate jar. But, I read the matrix and I have the good jar with good version (hibernate-validator 3.1, hibernate-search 3.1, hibernate core 3.3.0) I haven't idea to

What are the advantages and disadvantages for Spring vs. Jboss for an enterprise web application. As already said, but let me just restate the point. JBoss is an application server. Some Java application servers include Websphere Glassfish JBoss Spring is a framework. A rather large framework which offers quite a bit but for me one of the main features is MVC. MVC is a design pattern where you separate your Model from View from your Contoller. The model is the representation of the data. This can be backed by things like database or XML files. The view is what is used to view the model. This

I have been using Seam-gen with a small sample database to help me learn the Seam framework. Now I am going to build a more complex application. Are there disadvantages or things that I should watch out for if I decide to start from a seam-gen project? Are there disadvantages or things that I should watch out for if I decide to start from a seam-gen project ? No. A Seam-gen generated project can be opened without any restriction in NetBeans (like another project) If you use Eclipse, some settings are needed. Seam-gen takes care includes all libraries It creates by default, production and

I am working on my first Android Application. What I am trying to do is a POST request to a REST service I want the BODY of this request to be a JSON String. I am using google's GSON to generate the JSON that is sent to the server. Here is the code doing POST request: HttpPost requisicao = new HttpPost(); requisicao.setURI(new URI(uri)); requisicao.setHeader("User-Agent", sUserAgent); requisicao.setHeader("Content-type", "application/json"); HttpResponse resposta = null; //I can see the json correctly print on log with the following entry. Log.d(TAG, "JSon String to send as body in this

I'm trying to implement a web service which accepts a list of strings, each of which is a regular expression. These need to be compared against six columns of a database, and any rows which match need to be returned. I believe Oracle has a regexp_like() function which I might be able to use, but I'm looking for the best way to do this using Hibernate, so I'm not working against the persistence engine. I started with something like this, in which the participants collection contains the regular expressions: List<Message> messages = new ArrayList<Message>(); List<Message> m1 = ((Session)