coffeeejb.java

j2ee tutorial

/*
 *
 * Copyright 2000 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */

import java.math.BigDecimal;
import java.util.*;
import javax.ejb.*;
import javax.resource.cci.*;
import javax.resource.ResourceException;
import javax.naming.*;
import com.sun.connector.cciblackbox.*;

public class CoffeeEJB implements SessionBean {

    private SessionContext sc;
    private String user;
    private String password;
    private ConnectionFactory cf;


    public void ejbCreate() throws CreateException {
    }

    public void setSessionContext(SessionContext sc) {
        try {
            this.sc = sc;
            Context ic = new InitialContext();
            user = (String) ic.lookup("java:comp/env/user");
            password = (String) ic.lookup("java:comp/env/password");
            cf = (ConnectionFactory) ic.lookup("java:comp/env/CCIEIS");
        } catch (NamingException ex) {
            ex.printStackTrace();
        }
    }

    public int getCoffeeCount() {
        int count = -1;
        try {
            Connection con = getCCIConnection();
            Interaction ix = con.createInteraction();
            CciInteractionSpec iSpec = new CciInteractionSpec();
            iSpec.setSchema(user);
            iSpec.setCatalog(null);
            iSpec.setFunctionName("COUNTCOFFEE");
            RecordFactory rf = cf.getRecordFactory();
            IndexedRecord iRec = rf.createIndexedRecord("InputRecord");
            Record oRec = ix.execute(iSpec, iRec);
            Iterator iterator = ((IndexedRecord)oRec).iterator();
            while(iterator.hasNext()) {   
                Object obj = iterator.next();
                if(obj instanceof Integer) {
                    count = ((Integer)obj).intValue();
                }
                else if(obj instanceof BigDecimal) {
                    count = ((BigDecimal)obj).intValue();
                }
            }
            closeCCIConnection(con);
        }catch(ResourceException ex) {
            ex.printStackTrace();
        }
        return count;
    }


    public void insertCoffee(String name, int qty) {
        try {
            Connection con = getCCIConnection();
            Interaction ix = con.createInteraction();
            CciInteractionSpec iSpec = new CciInteractionSpec();
            iSpec.setFunctionName("INSERTCOFFEE");
            iSpec.setSchema(user);
            iSpec.setCatalog(null);
            RecordFactory rf = cf.getRecordFactory();
            IndexedRecord iRec = rf.createIndexedRecord("InputRecord");
            boolean flag = iRec.add(name);
            flag = iRec.add(new Integer(qty));
            ix.execute(iSpec, iRec);
            closeCCIConnection(con);
        }catch(ResourceException ex) {
            ex.printStackTrace();
        }
    }

    private Connection getCCIConnection() {
        Connection con = null;
        try {
            ConnectionSpec spec = new CciConnectionSpec(user, password);
            con = cf.getConnection(spec);
        } catch (ResourceException ex) {
            ex.printStackTrace();
        }
        return con;
    }

    private void closeCCIConnection(Connection con) {
        try {
            con.close();
        } catch (ResourceException ex) {
            ex.printStackTrace();
        }
    }

    public void ejbRemove() {}
    public void ejbActivate() {}
    public void ejbPassivate() {}

}