musicareaclient.java

本程序是作者开发的一个宽带娱乐系统的一个模块.

package com.singnet.music.client;

import java.util.ArrayList;
import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;

import com.singnet.music.MusicAreaInfo;
import com.singnet.music.ejb.MusicArea;
import com.singnet.music.ejb.MusicAreaHome;
import com.singnet.util.Pager;

public class MusicAreaClient {
     
	      private MusicArea musicArea = null;
	    private MusicAreaHome musicAreaHome = null;
	
	    //Construct the EJB test client
	    public MusicAreaClient() {
	        initialize();
	        musicArea=this.create();
	    }
	
	    public void initialize() {
	       try {
	
	            //get naming context
	            Context context = getInitialContext();
	            //look up jndi name
	            Object ref = context.lookup("MusicArea");
	            //look up jndi name and cast to Home interface
	            musicAreaHome = (MusicAreaHome) PortableRemoteObject.narrow(
	                    ref, MusicAreaHome.class);
	               } catch (Exception e) {
	            e.printStackTrace();
	        }
	
	    }
	
	    private Context getInitialContext() throws NamingException {
	        Hashtable environment = new Hashtable();
	
	        environment.put(Context.INITIAL_CONTEXT_FACTORY,
	                        "org.jnp.interfaces.NamingContextFactory");
	        environment.put(Context.URL_PKG_PREFIXES,
	                        "org.jboss.naming:org.jnp.interfaces");
	        environment.put(Context.PROVIDER_URL, "jnp://localhost:1099");
	
	        return new InitialContext(environment);
	    }
	
	    //----------------------------------------------------------------------------
	    // Methods that use Home interface methods to generate a Remote interface reference
	    //----------------------------------------------------------------------------
	
	    public MusicArea create() {
	               try {
	            musicArea = musicAreaHome.create();
	        } catch (Exception e) {
	            e.printStackTrace();
	        }
	        return musicArea;
	    }
	
	    //----------------------------------------------------------------------------
	    // Methods that use Remote interface methods to access data through the bean
	    //----------------------------------------------------------------------------
	
	    public boolean addMusicAreaInfo(MusicAreaInfo musicAreaInfo) {
	        boolean returnValue = false;
	        if (musicArea == null) {
	            System.out.println("Error in addMusicAreaInfo(): " 
	                               );
	            return returnValue;
	        }
	               try {
	            returnValue = musicArea.addMusicAreaInfo(musicAreaInfo);
	        } catch (Exception e) {
	            e.printStackTrace();
	        }
	        return returnValue;
	    }
	
	    public boolean editMusicAreaInfo(MusicAreaInfo musicAreaInfo) {
	        boolean returnValue = false;
	        if (musicArea == null) {
	            System.out.println("Error in editMusicAreaInfo(): " 
	                               );
	            return returnValue;
	        }
	               try {
	            returnValue = musicArea.editMusicAreaInfo(musicAreaInfo);
	        } catch (Exception e) {
	            
	            e.printStackTrace();
	        }
	        return returnValue;
	    }
	
	    public boolean deleteMusicAreaInfo(String id) {
	        boolean returnValue = false;
	        if (musicArea == null) {
	            System.out.println("Error in deleteMusicAreaInfo(): " 
	                               );
	            return returnValue;
	        }
	               try {
	            returnValue = musicArea.deleteMusicAreaInfo(id);
	        } catch (Exception e) {
	            e.printStackTrace();
	        }
	        return returnValue;
	    }
	
	    public MusicAreaInfo queryMusicAreaInfoById(String id) {
	        MusicAreaInfo returnValue = null;
	        if (musicArea == null) {
	            System.out.println("Error in getMusicAreaInfoById(): " 
	                               );
	            return returnValue;
	        }
	               try {
	            returnValue = musicArea.queryMusicAreaInfoById(id);
	        } catch (Exception e) {
	            e.printStackTrace();
	        }
	        return returnValue;
	    }
	
	    public MusicAreaInfo queryMusicAreaInfoByAreaname(String areaname) {
	        MusicAreaInfo returnValue = null;
	        if (musicArea == null) {
	            System.out.println("Error in getMusicAreaInfoById(): " 
	                               );
	            return returnValue;
	        }
	               try {
	            returnValue = musicArea.queryMusicAreaInfoByAreaname(areaname);
	        } catch (Exception e) {
	            e.printStackTrace();
	        }
	        return returnValue;
	    }
	    public ArrayList queryMusicAreaInfo() {
	        ArrayList returnValue = null;
	        if (musicArea == null) {
	            System.out.println("Error in queryMusicAreaInfo(): " 
	                               );
	            return returnValue;
	        }
	       
	        try {
	            returnValue = musicArea.queryMusicAreaInfo();
	        } catch (Exception e) {
	            e.printStackTrace();
	        }
	          return returnValue;
	    }
	
	     
	    //Main method
	    public static void main(String[] args) {
	        MusicAreaClient client = new MusicAreaClient();
	        // Use the client object to call one of the Home interface wrappers
	        // above, to create a Remote interface reference to the bean.
	        // If the return value is of the Remote interface type, you can use it
	        // to access the remote interface methods.  You can also just use the
	        // client object to call the Remote interface wrappers.
	    }
	}