1. Designing a website using J2EE components... JSP+Servlets+EJB+MySQL... Please guide what all concepts are needed to draw a good and attractive website stackoverflow.comI am in position of designing a website now, purely in Java using J2EE components mentioned in the title.. I have designed the Business Logic for my project using J2SE.. and now ... |
2. Calling to a database directly through servlet vs using an EAO and EJB intermidiary stackoverflow.comI'm displaying text and xml on a webpage through a servlet. The servlet just loads the HTML/XML to the page on load through calls in the getPost() method. Now that ... |
3. JTA Transaction time out Vs EJB Timeout coderanch.com |
4. how i can specify transaction isolation level in ejb3? coderanch.com |
5. EJB3.0 transactions coderanch.comThanks for your reply, Just to verify your answer by example, is this correct, Suppose one EJB1 method1 is calling EJB2 method2. Method1's transactions attribute is requires new and method2's trasnaction attribute is also requires new. My understanding is that method's one transaction will be suspended and method2 will be started in a new transaction. Is this correct? Thanks Mark. |
6. EJB3.0 and Stored Procedure coderanch.comWhat is the advantage of using Stored Procedure over EJB3.0?.We are calling Stored procedure using Native Query method.In EJB3.0 Framework already having persistent mechanism over tables like em.persist(obj),em.merge(obj),etc.I am concerned that by using native query method bypassing the persistence support provided by the EJB3 framework.So What is the different between native queries and Persistent mechanism?Can any one please elobrate. |
7. EJB using Stored Procedure? coderanch.comEverything about developing software is not on a "web site" waiting for you to find it with a ?oogle search. If you learn about how to implement the Data Access Object design pattern and know how to program Enterprise JavaBeans, then you should not have any problem with executing a stored procedure from an Enterprise JavaBean. Below is a guide to ... |
8. EJB Transactions coderanch.com |
9. Caching EJB stored procedure calls. coderanch.comWe have an application that is using a stateless session bean to call a stored procedure using straight JDBC. Sesson bean calls a class which has connection = getDataSource().getConnection(); Proc = connection.prepareCall(spString); rs = proc.executeQuery(); The problem is that the none of the data retrieved by the SP is cached at the JVM level. All calls result in a round trip ... |
10. Problems understanding EJB transactions and isolation coderanch.comHello, I've started to play a little bit around with EJBs 3 some days ago. Things have seemed to be pretty straight-forward to me until I've stumbled accross the following problem with the transactions/isolation concept of EJB: I have some kind of simple stateless session bean, like the following: @Stateless public class TestBean implements TestRemote { /** * The entity manager ... |
11. How to programmatically find if EJB is operating in transaction mode coderanch.comHi, I've an MDB which can be configured to run in either transactional or not-transactional mode at the container level. This is defined in the deployment descriptor with the trans attribute or "Required" or "NotSupported" The relevant snippet from the deployment xml is as follows |
12. CMT EJB 2.1 Transaction Problems coderanch.com |
13. EJB3 & Mysql + Multiple Schema coderanch.comHi Ranchers, I wondered if perhaps anybody has an opinion on the following problem. I have an EJB3 setup that services the needs of a customer. This means I have one EJB3 app deployed that connects to a MySQL database schema. However, lets imagine I have 1000 customers. Each customer will have their own MySQL schema, although structually they are identical. ... |
14. USER TRANSACTION , STATELESS SESSION EJB , NEED FEW TIPS coderanch.com |
15. EJB3 and Stored Procedures coderanch.comI have written a single table EJB 3 code and it works perfectly fine with the basic CRUD operations. Now i want to enhance this code by calling Stored procedures but I'm not too sure how to go about it. I used Eclipse ganymede as IDE and use 'JPA Tools' plugin to create the Entities. Since my Stored Proc has sqls ... |
17. How can i rollback the Transactions when using with CMT in EJB3.0 coderanch.com |
18. Calling a transactional method from non-transactional method in EJB coderanch.com |
19. Breaking up transaction in EJB's coderanch.comHello Ahmed, I am brainstorming here so I am not sure if this would work, but what about using MDB the returns confirmation if sub-transactions succeed. so the main EJB starts sending messages to different MDBs and check the confirmation of each. but this sounds like your EJB will be doing a lot of management on its own, in other words ... |
20. Transaction through EJB3 coderanch.com |
21. How to set EJB Transaction as Local Transaction in websphere coderanch.com |
22. EJB 3.0 Transaction Timeout annotation coderanch.com |
23. jta transaction spanning across recrusive call of statless ejb session? coderanch.com |
24. transaction in EJB 2 coderanch.com |
25. EJB and Transaction coderanch.comWhat difference did you see when you tried it out yourself? Basically >executing a bean method within an already exisitng transaction This would be a bean whose transaction attribute may be supports or required. You throw a SystemException or call the setRollBackOnly and the original transaction is rolled back. >transaction and within a new transaction by suspending already running client's transaction. ... |
26. EJB3 noob and User Managed Transaction coderanch.comHi all, i'm a noob in ejb in general, i'm trying to use transactions. I have the following code: @Stateful(mappedName="Movements") @TransactionManagement(TransactionManagementType.BEAN) public class MovementBean { @PersistenceContext private EntityManager em; @Resource private UserTransaction ut; public boolean insert(Object obj) throws Exception { boolean result = false; try{ ut.begin(); em.persist(obj); ut.commit(); result = true; }catch(Exception e){ ut.rollback(); throw e; }finally{ return result; } } ... |
27. EJB3 (JBoss 5) Problem with Persistence Context / Transaction coderanch.comI am experimentig with JPA and I have difficulties to reproduce an example taken from JavaMagazin 9/09 about the ECB Pattern. JBoss 5.1.0 GA, MySQL 5.0 The "boundary" (facade) @Stateless public class OrderServiceBean implements OrderService { @EJB DeliveryService deliveryService; @EJB Warehouse warehouse; @TransactionAttribute(TransactionAttributeType.REQUIRED) public Order order(Order newOrder) throws BillingException { Order order = warehouse.checkout(newOrder); deliveryService.deliver(order); return order; } } The Warehouse ... |
28. How to Achive Transaction Concurrency in EJB 3 coderanch.comHello Udaya Welcome to JavaRanch. That's the optimistic locking feature which can be used to prevent inappropriate usage of concurrent updates over an entity in the database. Simply you can use this @Version annotation to annotate a property of a primary entity. @Version protected int getVersion(){ ... } Now, the version property manages a version value for the given entity in ... |
29. EJB Transaction Problem coderanch.comHi, I am trying to persist a data by using EntityManager.persist method. I am using EJB 3.0 Stateless Session Facade Bean and its transaction is Container-Managed. (CMP) After persist operation, within the same ejb method, I am trying to update the data by using a JDBC "Update" query. But the problem is that the data is not updated. The transaction is ... |
31. Deafult behaviour of EJB Container Managed Transaction coderanch.com |
32. multithreaded and transactional EJB System - a greenhorn's question coderanch.comHi guys, I'm just starting to study EJB, by reading the Enterprise JavaBeans 3.0 book. Actually, I'm doing this because in the near future I plan to use this technology in my company. Today, we have an application that accesses N FTP servers and downloads files for the N corresponding local directories. It does uploads as well. Each of the FTP ... |
33. EJB Transaction Attribute coderanch.com |
34. Question about Transactions in EJB / MDB scenario coderanch.comHi, I have got the following question about EJB 2.1 concerning Container- and Bean-managed transactions (CMT / BMT). We use WAS 6.1 for deployment and Oracle 10g as database, but I assume this does not matter... ----------------------------------------------------------------------------------------------- Here is the scenario: A MDB (Container-managed + transaction required specified) receives a message from a queue and then calls an operation of a ... |
35. Handling of Transactions in EJB 2.1 version coderanch.com |
37. EJB local injection and transactions coderanch.comHello, I'm developing a JavaEE6 application, and I need to communicate two EJBs, one in the business tier and the other in the persistence tier. The persistence EJB doesn't deal with a model, it just queries a chaotic database running on SQL Server 2005, but I use an EntityManager so I don't have to worry about transactions anyway ;) So the ... |
38. Convert this SQL to EJB QL coderanch.com |
40. Regarding understanding of EJB Container Managed Transaction Attributes coderanch.comThanks Paul . That was really usefull and as far as my knowledge is concerned we will go for JTA only concerned only when we are using multiple Resources (For example different DataBases ) . So in normal projects JTA would not be applicable . correct me if i am wrong . Please reply . Thanks in advance. |
42. eclipse+jboss+ejb3+mysql+dynamicWebProject coderanch.com |
43. EJB Transaction coderanch.com |
44. EJB3 2 client apps and 2 different databases coderanch.com |
45. EJB 3.0 Nested Transaction Issue coderanch.com |
46. Default EJB transaction attribute coderanch.com |
47. EJB Transactions Question coderanch.com |
48. javax.ejb.EJBTransactionRolledbackException: Transaction rolled back coderanch.com |
49. Transaction management in EJB? coderanch.comExcellent question, I'm not sure about the original implementation of the JDBC classes, but I bet they're not transactional. The implementation of entity manager in application servers compliance with JEE are required to make them transactional, I'm not sure if this is the same while using JPA in desktop clients. However, what you need to keep in mind is that being ... |
50. JDBC transactions in EJB 2.0 coderanch.com |
51. Callbacks & Transactions in Stateful EJBs coderanch.com |