videoclassclient.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.VideoClassInfo;
import com.singnet.video.ejb.VideoClass;
import com.singnet.video.ejb.VideoClassHome;

public class VideoClassClient {
    private VideoClass videoClass = null;
    private VideoClassHome videoClassHome = null;

    //Construct the EJB test client
    public VideoClassClient() {
        initialize();
        videoClass=create();
    }

    public void initialize() {
        try {

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

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


    public boolean addVideoClassInfo(VideoClassInfo videoClassinfo) {
        boolean returnValue = false;
        if (videoClass == null) {
            System.out.println("Error in addVideoClassInfo(): ");
            return returnValue;
        }
        

        try {
            returnValue = videoClass.addVideoClass(videoClassinfo);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

    public boolean editVideoClassInfo(VideoClassInfo videoClassinfo) {
        boolean returnValue = false;
        if (videoClass == null) {
            System.out.println("Error in editVideoClassInfo(): ");
            return returnValue;
        }
      
        try {
            returnValue = videoClass.editVideoClass(videoClassinfo);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

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

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

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

    public VideoClassInfo getVideoClassById(String id) {
        VideoClassInfo returnValue = null;
        if (videoClass == null) {
            System.out.println("Error in getVideoClassInfoByUid(): " 
                               );
            return returnValue;
        }
        try {
            returnValue = videoClass.getVideoClassById(id);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }
    public VideoClassInfo getVideoClassByClassname(String classname) {
        VideoClassInfo returnValue = null;
        if (videoClass == null) {
            System.out.println("Error in getVideoClassInfoByUid(): " 
                               );
            return returnValue;
        }
        try {
            returnValue = videoClass.getVideoClassByClassname(classname);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }


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