ejb properties

1. When dealing with complex business logic, it requires concurrency, security, transaction processing, and other functions. If it is implemented using JavaBean, programmers must write these functional code by themselves. For EJB, the EJB container implements these functions. 2. ejbs implement distributed network computing. ejbs can be different from the same server, but not JavaBean. 3. for

A remote object must include at least 4 class files: The remote object, the interface of the remote object, the stub of the object that implements the remote interface, and the 4 class files for the skeleton of the object. At least 10 classes are included in the EJB: Bean class, specific app server Bean implementation class, Bean's remote interface, specific app server remote interface implementation class, specific app server remote interface imple

To configure a data source for JBossI use Oracle 11g (actually the same as the 10G configuration)Open DirectoryJBoss installation directory \modules\com\Then build the folder OracleAnd then into the Oracle build folder mainAnd then into main.namely oracle\main\Ojdbc6.jar The Oracle driver jar package to this directoryand create a new module.xml, which reads as follows:Note that the red word "com.oracle" is also used in the following configuration fileThen open the JBoss installation directory \s

This article will briefly discuss my understanding of the differences between the two persistence context and seam-managed persistence in EJB 3.0, the problems to be solved, and the problems I am wondering about. Persistence context for EJB 3.0 (JPA) When you use EJB 3.0, you will notice that there are two types of container management persistence context in

In the previous blog, we described how to create the first EJB project using Eclipse+jboss, and encountered an error during this period:Exception in thread "main" java.lang.ClassCastException:com.sun.proxy. $Proxy 2 cannot is cast to Com.tgb.ejb.HelloWorldBean at Com.tgb.ejb.client.Client.main (client.java:12)There are two reasons for this:1. Your hellowroldbean does not show the Hellowrold interface@Stateless @remote ({helloworld.class}) public class

Problem:If the Code cannot be found, xxxx not bound is still reported. Problem generation process:Project created in the following way: ejbtest2_1 Select the following two items to generate: ejbtest2_1ejb and ejbtest2_1web When deploying to JBoss, you only need to deploy ejbtest2_1, and then open the webpage in ejbtest2_1web through the webpage. ( Note: you must add all the packages in the JBoss client to the EJB.) But it is counterprodu

The example is just a simple logon test. JSP calls the struts action, and then calls EJB in the action. Dao in EJB calls Hibernate and uses the JBoss database connection pool. The database is MySQL. The package contains the test. sqldatabase table structure, which can be imported to MySQL. Mysql-db.xml configuration database connection pool, and ear put in the same deploy directory. Run JBoss. the vers

Author: Luo Xiaohu Compilation Preface This article is intended for readers who want to develop ejb in the jboss environment. Before reading this article, you 'd better have a basic understanding of EJB. JBOSS is an open-source free EJB server that implements most of the functions specified by other J2EE. sun has now adopted JBOSS as the standard impleme

EJB for J2EE,EJBIt is sun's JavaEE server component model. Its greatest use is to deploy distributed applications. EJB standardizes the deployment and development of server components developed using java. With the advantages of cross-platform java, distributed systems deployed with EJB technology can be not limited to specific platforms.EJBEnterprise JavaBean is

) error: 1. If it is written (the table name is used for query, no entity name is used ): Query query = em. createquery ("select P from person P where P. Sex = 'male '"); Error: Javax. EJB. ejbexception: Java. lang. illegalargumentexception: Org. hibernate. hql. ast. querysyntaxexception: person is not mapped [select P from person P where p. sex = 'male']; Nested exception is: Java. lang. illegalargumentexception: Org. hibernate. hql. ast. query

can be applied to jdk1.6. So I didn't care much about it. The result was not compiled when ant compiled the JBoss server. When an error is thrown (jboss_home/Server/All/lib/JBoss. Jar cannot be found), I do not know the version. Therefore, Baidu and Google have no response. There is a kind of call for Baidu. Finally, I started my head and changed to jboss4.2.3 because versions earlier than 4.2 are not compatible with jdk1.6. The error continues, but the error message is changed (an XML file doe

4. Develop EJB1. Class introduction:The main steps for developing EJBs generally include the following aspects: Development, configuration, and assembly. Development: define three classes: Bean class, local and remote interface class of Bean.Configuration: the configuration includes generating the configuration descriptor-an XML file, declaring the attributes of the Enterprise Bean, and binding the bean class file (including the stub file and the skeleton file ). Finally, put these configuration

Silver bullet developed by Java Enterprises: grails + EJB InfoqPublished an articleJason RandolphWrittenArticleThe question is:"Grails + EJB Domain Models step-by-step". This article createsEjb3OfDomain Model(Employees and their computers), useGrailsAdded the add, delete, and modify functions for the object class above. The entire process andGrailsVery close, veryCool. GrailsObject link ing(Grails

Eclipse 3.01 + JBoss 3.2.3 + lomboz 3.0.1, the first EJB finally ran up. Pay special attention to the following two points:The JBoss version must be 3.2.3. Other versions are surprisingly strange, either JBoss-boot cannot be found or XDoclet execution fails.An error is reported when the EJB file is generated. The ejbs. xml file cannot be found and then exits. In fact, you only need to create an empty fil

The JS example is just a simple login test. The JSP invokes the action of struts and then invokes the DAO call in EJB,EJB in the action hibernate, using the JBoss database connection pool. Database is MySQL. The package has Test.sql database table structure, import to MySQL can be. Mysql-db.xml configures the database connection pool, and the ear is placed in the same deploy directory. Run

From the blog: http://www.cnblogs.com/yangyquin/p/5328344.html You can learn how to use IntelliJ idea to build an EJB module and create a new test module.But I found that the new EJB project could be optimized to create a JSP file inside the EJB module to invoke the EJB project.1, in IntelliJ idea New

Simplify developers' viewsIf you use an existing version of EJB, you will understand how difficult it is to develop a simple EJB program such as HelloWorld. You need at least two interfaces, one bean class and one deployment description file. Most developers want to know why I need all of this. IDEs (development environment tools), such as Oracle's JDeveloper, Eclipse, and XDoclet, simplify the deve

The Entity Bean provides an object-oriented abstraction for the underlying database. It can also create some business methods to operate on the data contained in the Entity Bean. To improve the convenience and efficiency of data operations, J2EE provides a type of SQL language EJB Query Language, abbreviated as EJB-QL, which is like the hql (Hibernate query language) we use in hibernate) same. By using the

Develop EJB: 1. Create an EJB Project 2. write code (Entity Bean; Session Bean) ① Entity Bean @ Entitypublic class user implements serializable {@ ID @ generatedvalueprivate int ID; private string username; private string password; // getter setter method} ② Session Bean Interface: public interface UserManager {public void addUser(User user);public void deleteUser(int id);}public interface UserManagerLocal

What's so great about Enterprise JavaBeans (EJBs), and why is it so important to java™2 Platform, Enterprise Edition (Java ee) development? In this issue of the Geronimo rebel column, OPENEJB co-founder David Blevins will describe what EJB can do for you and explain how OPENEJB is chosen as an EJB implementation of Apache Geronimo. Brief introduction To be honest, in my opinion,