sampletagwriterclient.java

SUnRDIS网络应用平台,可以在该平台上开发RFID应用,系统.

/*
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * Use is subject to license terms.
 *
 */
package sample;

import java.io.*;
import java.util.*;
import java.net.URI;
import java.util.logging.*;
import java.util.Properties;
import java.rmi.RMISecurityManager;
import com.sun.autoid.util.ReaderClient;
import net.jini.core.discovery.LookupLocator;
import net.jini.discovery.DiscoveryManagement;
import com.sun.autoid.identity.*;
import com.sun.autoid.reader.Reader;
import com.sun.autoid.event.IdentifierListEvent;


/*
 * This class is to provide an example to access reader's write tag methods.
 * Using this class, one can find the reader from Event Manger's Jini lookup server 
 * and then be able to access the reader's finctions. Here give an example to call
 * read/write tag methods.
 */
public class SampleTagWriterClient {
    
    public SampleTagWriterClient() {}
    
    /* main to call Reader's interface to write Identifier
    */
     public static void main(String[] args) {
         ReaderClient client = null;
         
         /** this is required */
         System.setSecurityManager(new RMISecurityManager());
         
         String readerName = System.getProperty("com.sun.autoid.ReaderName", "PMLReader");
         String groupStr = System.getProperty("com.sun.autoid.JiniGroup", "ALL");
         String locatorStr = System.getProperty("com.sun.autoid.JiniLocator");
         String tagBitSizeStr = System.getProperty("com.sun.autoid.TagBitSize");
         int tagBitSize = 64;
         if (tagBitSizeStr != null)
             tagBitSize = Integer.parseInt(tagBitSizeStr);
         
         String id = null;
         if (args.length > 0)   
             id = args[0];
         
         if (id == null){
             System.out.println("Need identifier URI");
             System.exit(1);
         }
             
         try {
	     client = new ReaderClient(readerName, 
                                       ReaderClient.getGroups(groupStr),
                                       ReaderClient.getLocators(locatorStr));
             
             // Wait for a while for finding the reader
             System.out.println("Waiting for looking up the reader ...");
             Thread.sleep(3*1000);
             
             Identifier newIdentifier = IdentifierFactory.createIdentifier(new URI(id), tagBitSize);
             Reader reader = client.getReader(); 
             if (reader == null){
                 System.out.println("Didn't find reader quit");
                 System.exit(1);
             }
            
             // example to get tag list, assume scanLength is 500ms
             java.util.Collection c = reader.getTagList(readerName, 500);
             Iterator i = c.iterator();
             while (i.hasNext()) {
                 IdentifierListEvent eventList = (IdentifierListEvent) i.next();
                 System.out.println("Source= " + eventList.getSource());
                 Iterator j = eventList.getTagList().iterator();
                 while (j.hasNext()) {
                     Identifier epc = (Identifier)j.next();
                     System.out.println("tag= " + epc.getURI());
                 }
             }
             
             // example to write tag. 
             // if parameters required, use below method
             // reader.writeIdentifier(readerName, newIdentifier, param);
             reader.writeIdentifier(readerName, newIdentifier);
             System.out.println(readerName + " wrote Identifier: " + id);
          
         }catch (Exception ex){
             ex.printStackTrace();
         } finally {
             if (client != null)
                client.terminate();
         }
     }
    
}