//ServerBox.java

import java.io.DataInputStream; 
import java.io.DataOutputStream; 
import java.io.IOException; 

import java.util.Vector; 

import javax.bluetooth.DiscoveryAgent; 
import javax.bluetooth.LocalDevice; 
import javax.bluetooth.ServiceRecord; 
import javax.bluetooth.UUID; 
import javax.microedition.io.Connector; 
import javax.microedition.io.StreamConnection; 
import javax.microedition.io.StreamConnectionNotifier; 

import javax.microedition.lcdui.Command; 
import javax.microedition.lcdui.CommandListener; 
import javax.microedition.lcdui.Displayable; 

import javax.microedition.lcdui.TextBox; 
import javax.microedition.lcdui.TextField; 

/** 
* 服務端GUI 
* @author Jagie 
* 
* TODO To change the template for this generated type comment go to 
* Window - Preferences - Java - Code Style - Code Templates 
*/ 
public class ServerBox extends TextBox implements Runnable, CommandListener { 

     Command com_pub = new Command("開啟服務", Command.OK, 0); 

     Command com_cancel = new Command("終止服務", Command.CANCEL, 0); 

     Command com_back = new Command("返回", Command.BACK, 1); 

     LocalDevice localDevice; 

     StreamConnectionNotifier notifier; 

     ServiceRecord record; 

     boolean isClosed; 

     ClientProcessor processor; 

     StupidBTMIDlet midlet; 
     //響應服務的uuid 
     private static final UUID ECHO_SERVER_UUID = new UUID( 
             "F0E0D0C0B0A000908070605040302010", false); 

     public ServerBox(StupidBTMIDlet midlet) { 
         super(null, "", 500, TextField.ANY); 
         this.midlet = midlet; 
         this.addCommand(com_pub); 
         this.addCommand(com_back); 
         this.setCommandListener(this); 
     } 


     public void run() { 
         boolean isBTReady = false; 

         try { 

             localDevice = LocalDevice.getLocalDevice(); 

             if (!localDevice.setDiscoverable(DiscoveryAgent.GIAC)) { 
                 showInfo("無法設置設備發現模式"); 
                 return; 
             } 

             // prepare a URL to create a notifier 
             StringBuffer url = new StringBuffer("btspp://"); 

             // indicate this is a server 
             url.append("localhost").append(':'); 

             // add the UUID to identify this service 
             url.append(ECHO_SERVER_UUID.toString()); 

             // add the name for our service 
             url.append(";name=Echo Server"); 

             // request all of the client not to be authorized 
             // some devices fail on authorize=true 
             url.append(";authorize=false"); 

             // create notifier now 
             notifier = (StreamConnectionNotifier) Connector 
                     .open(url.toString()); 

             record = localDevice.getRecord(notifier); 

             // remember we've reached this point. 
             isBTReady = true; 
         } catch (Exception e) { 
             e.printStackTrace(); 
             
         } 

         // nothing to do if no bluetooth available 
         if (isBTReady) { 
             showInfo("初始化成功，等待連接"); 
             this.removeCommand(com_pub); 
             this.addCommand(com_cancel); 
         } else { 
             showInfo("初始化失敗,退出"); 
             return; 

         } 

         // 生成服務端服務線程對象 
         processor = new ClientProcessor(); 

         // ok, start accepting connections then 
         while (!isClosed) { 
             StreamConnection conn = null; 

             try { 
                 conn = notifier.acceptAndOpen(); 
             } catch (IOException e) { 
                 // wrong client or interrupted - continue anyway 
                 continue; 
             } 
             processor.addConnection(conn); 
         } 

     } 

     public void publish() { 
         isClosed = false; 
         this.setString(null); 
         new Thread(this).start(); 

     } 

     public void cancelService() { 
         isClosed = true; 
         showInfo("服務終止"); 
         this.removeCommand(com_cancel); 
         this.addCommand(com_pub); 
     } 

     /* 
      * (non-Javadoc) 
      *  
      * @see javax.microedition.lcdui.CommandListener#commandAction(javax.microedition.lcdui.Command, 
      *       javax.microedition.lcdui.Displayable) 
      */ 
     public void commandAction(Command arg0, Displayable arg1) { 
         if (arg0 == com_pub) { 
             //發布service 
             publish(); 
         } else if (arg0 == com_cancel) { 
             cancelService(); 
         } else { 
             cancelService(); 
             midlet.showMainMenu(); 
         } 

     } 
     
     /** 
      * 內部類，服務端服務線程。 
      * @author Jagie 
      * 
      * TODO To change the template for this generated type comment go to 
      * Window - Preferences - Java - Code Style - Code Templates 
      */ 
     private class ClientProcessor implements Runnable { 
         private Thread processorThread; 

         private Vector queue = new Vector(); 

         private boolean isOk = true; 

         ClientProcessor() { 
             processorThread = new Thread(this); 
             processorThread.start(); 
         } 

         public void run() { 
             while (!isClosed) { 

                 synchronized (this) { 
                     if (queue.size() == 0) { 
                         try { 
                             //阻塞，直到有新客戶連接 
                             wait(); 
                         } catch (InterruptedException e) { 

                         } 
                     } 
                 } 
                 
                 //處理連接隊列 

                 StreamConnection conn; 

                 synchronized (this) { 

                     if (isClosed) { 
                         return; 
                     } 
                     conn = (StreamConnection) queue.firstElement(); 
                     queue.removeElementAt(0); 
                     processConnection(conn); 
                 } 
             } 
         } 
         
         /** 
          * 往連接隊列添加新連接，同時喚醒處理線程 
          * @param conn 
          */ 

         void addConnection(StreamConnection conn) { 
             synchronized (this) { 
                 queue.addElement(conn); 
                 notify(); 
             } 
         } 

     } 

     /** 
      * 從StreamConnection讀取輸入 
      * @param conn 
      * @return 
      */ 
     private String readInputString(StreamConnection conn) { 
         String inputString = null; 

         try { 

             DataInputStream dis = conn.openDataInputStream(); 
             inputString = dis.readUTF(); 
             dis.close(); 
         } catch (Exception e) { 
             e.printStackTrace(); 
         } 
         return inputString; 
     } 
     
     /** 
      * debug 
      * @param s 
      */ 

     private void showInfo(String s) { 
         StringBuffer sb = new StringBuffer(this.getString()); 
         if (sb.length() > 0) { 
             sb.append("\n"); 
         } 

         sb.append(s); 
         this.setString(sb.toString()); 

     } 
     

     /** 
      * 處理客戶端連接 
      * @param conn 
      */     
     private void processConnection(StreamConnection conn) { 

         // 讀取輸入 
         String inputString = readInputString(conn); 
         //生成響應 
         String outputString = inputString.toUpperCase(); 
         //輸出響應 
         sendOutputData(outputString, conn); 

         try { 
             conn.close(); 
         } catch (IOException e) { 
         } // ignore 
         showInfo("客戶端輸入:" + inputString + ",已成功響應!"); 
     } 
     
     /** 
      * 輸出響應 
      * @param outputData 
      * @param conn 
      */ 

     private void sendOutputData(String outputData, StreamConnection conn) { 

         try { 
             DataOutputStream dos = conn.openDataOutputStream(); 
             dos.writeUTF(outputData); 
             dos.close(); 
         } catch (IOException e) { 
         } 

     } 
}