videoclient.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.video.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.util.Pager;
import com.singnet.video.VideoInfo;
import com.singnet.video.ejb.Video;
import com.singnet.video.ejb.VideoHome;
import com.singnet.video.ejb.VideoHome;

public class VideoClient {
    private Video video = null;
    private VideoHome videoHome = null;

    //Construct the EJB test client
    public VideoClient() {
        initialize();
        video=create();
    }

    public void initialize() {
        try {

            //get naming context
            Context context = getInitialContext();
            //look up jndi name
            Object ref = context.lookup("Video");
            //look up jndi name and cast to Home interface
            videoHome = (VideoHome) PortableRemoteObject.narrow(ref, VideoHome.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 Video create() {
      
        try {
            video = videoHome.create();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return video;
    }

    //----------------------------------------------------------------------------
    // Methods that use Remote interface methods to access data through the bean
    //----------------------------------------------------------------------------


    public boolean addVideoInfo(VideoInfo videoinfo) {
        boolean returnValue = false;
        if (video == null) {
            System.out.println("Error in addVideoInfo(): ");
            return returnValue;
        }
        

        try {
            returnValue = video.addVideo(videoinfo);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

    public boolean editVideoInfo(VideoInfo videoinfo) {
        boolean returnValue = false;
        if (video == null) {
            System.out.println("Error in editVideoInfo(): ");
            return returnValue;
        }
      
        try {
            returnValue = video.editVideo(videoinfo);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

    public boolean deleteVideoInfo(String id) {
        boolean returnValue = false;
        if (video == null) {
            System.out.println("Error in deleteVideoInfo(): " );
            return returnValue;
        }
       
        try {
            returnValue = video.deleteVideo(id);
        } catch (Exception e) {
            e.printStackTrace();
        
        }
        return returnValue;
    }

    public ArrayList queryVideoInfo(Pager pager) {
        ArrayList returnValue = null;
        if (video == null) {
            System.out.println("Error in queryVideoInfo(): " );
            return returnValue;
        }
       
        try {
            returnValue = video.queryVideo(pager);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

    public int getTotal(Pager pager) {
        int returnValue = 0;
        if (video == null) {
            System.out.println("Error in getTotal(): " );
            return returnValue;
        }
        try {
            returnValue = video.getTotal(pager);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

    public VideoInfo getVideoById(String id) {
        VideoInfo returnValue = null;
        if (video == null) {
            System.out.println("Error in getVideoInfoByUid(): " 
                               );
            return returnValue;
        }
        try {
            returnValue = video.getVideoById(id);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }


    //Main method
    public static void main(String[] args) {
    	VideoClient client = new VideoClient();
        // 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.
    }
}