EJB访问Weblogic用T3

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package com.newmodern.etm.utility;/** * Title: * Description: * Copyright:    Copyright (c) 2001 * Company: newmodern * @author Colin * @version 1.0 */import java.util.*;import javax.naming.*;import javax.ejb.*;import javax.rmi.PortableRemoteObject;import javax.sql.*;import java.sql.*;public class EJBUtil {    private static Context context = null;    private static final String url = "t3://localhost:7001";    private static final String JDBC_JNDI = "jdbc/XAOracle";    public static Object getEJBHome(String lookupName, Class homeClass) {        try {            if (context==null) {                context = getInitialContext();            }            Object home = PortableRemoteObject.narrow(                                context.lookup(lookupName),                                homeClass);            return home;        } catch (NamingException ne) {            throw new EJBException(ne.getMessage());        }    }    public static Connection getConnection(String lookupName) {        try {            if (context==null) {                context = getInitialContext();            }            DataSource ds = (DataSource)PortableRemoteObject.narrow(                                context.lookup(lookupName),                                DataSource.class);            return ds.getConnection();        } catch (NamingException ne) {            throw new EJBException(ne.getMessage());        } catch (SQLException e) {            throw new EJBException(e.getMessage());        }    }    public static Connection getConnection() {        try {            if (context==null) {                context = getInitialContext();            }            DataSource ds = (DataSource)PortableRemoteObject.narrow(                                context.lookup(JDBC_JNDI),                                DataSource.class);            return ds.getConnection();        } catch (NamingException ne) {            throw new EJBException(ne.getMessage());        } catch (SQLException e) {            throw new EJBException(e.getMessage());        }    }    private static Context getInitialContext() throws NamingException {        try {          Properties h = new Properties();          h.put(Context.INITIAL_CONTEXT_FACTORY,              "weblogic.jndi.WLInitialContextFactory");          h.put(Context.PROVIDER_URL, url);          return new InitialContext(h);        } catch (NamingException ne) {            throw ne;        }    }}

我们可以用下面方式调用该类：lookup找Home:

    public void insertCategory(String codeSubscriber, String systemUsed,        String codeCategory, String codeCategoryGroup, String categoryDesc,        String actionBy, Timestamp newTimestamp)        throws ETMDataAccessException, ETMDataAlreadyExistsException {            try {                CategoryHome home =(CategoryHome)EJBUtil.getEJBHome(                "MyMasterCategory",CategoryHome.class);                home.create(codeSubscriber, systemUsed, codeCategory,                codeCategoryGroup, categoryDesc, actionBy, newTimestamp);            } catch (DuplicateKeyException e) {                throw new ETMDataAlreadyExistsException();            } catch (RemoteException e) {                throw new ETMDataAccessException(e);            } catch (CreateException e) {                throw new ETMDataAccessException(e);            }    }    String subscriberSql = "Select code_subscriber, subscriber_name "          "From subscriber Where status = 'A' ";    public Collection getSubscriberList() throws ETMDataAccessException {        Connection con = null;        PreparedStatement pStmt = null;        ResultSet res = null;        SubscriberEntity subscriber = null;        Collection page = new ArrayList();        try {           //getConnection();            con = EJBUtil.getConnection("jdbc/XAOracle");            pStmt = con.prepareStatement(subscriberSql);            SystemLogger.getInstance().logDebug("SQL:" subscriberSql "<-START->");            res = pStmt.executeQuery();            SystemLogger.getInstance().logDebug("SQL:" subscriberSql "<-END->");            while (res.next()) {                subscriber = new SubscriberEntity(                    res.getString("code_subscriber"),                    res.getString("subscriber_name"));                page.add(subscriber);            }        } catch (SQLException e) {            throw new ETMDataAccessException(e);        } finally {           if (res != null) {               try {                   res.close();               } catch (Exception e) {}           }            if (pStmt != null) {                try {                    pStmt.close();                } catch (Exception e) {}            }            if (con != null) {                try {                    con.close();                    con = null;                } catch (Exception e) {}            }        }        return page;    }