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JEAP 6 - Clustered EJB3



A. 學會建立JBoss EAP 的 Cluster, Standalone or Domain 都可以. (請參考先前的文章)
B. 學會寫EJB (請看上次的 EJB 建立 Stateless session bean)

因為上次是寫Stateless, 那我們這次就寫Stateful Session Bean囉!

1. 請參考上次建立EJB 的方法,唯一的不同,就是這次建立的時候建的是Stateful. 然後建立完畢後,請在最上方加上@Clustered 的 annotation.

2. 啟動Cluster 的兩個JBoss EAP 6 Server, 把兩個EAR 檔案部署上去,這次我把其中一台的port 全部offset 成都加100.

3. 建立EJB Client, 這次換個不同的方式讀取設定檔,請在Client 的專案中,建立一個resource 的 檔案夾,建立 這裡就是告訴我們的Client 有哪些EJB 的來源是可以去抓的。
package redhat.remote;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;

import redhat.remotebeans.MyStatusBeanRemote;

public class EJBClient {
 public static void main(String ar[]) throws Exception{
        Context context=null;
         final Hashtable jndiProperties = new Hashtable();
            jndiProperties.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");
            context = new InitialContext(jndiProperties);
        }catch (Exception e) {
        MyStatusBeanRemote remote=(MyStatusBeanRemote)context.lookup("ejb:MyEJBProjectEAR/MyEJBProject/MyStatusBean!redhat.remotebeans.MyStatusBeanRemote?stateful");

remote.connection.default.port = 4447
remote.connection.default1.port = 4547

4. 執行 EJB Client, 可以看見他有成功地抓到兩個不同的EJB 來源。並且完成呼叫拉!


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