使用REST Web服务停止套接字-JAVA

我又带着另一个问题回来了，我试着搜索一个问题/答案，但到目前为止没有一个有效，所以我决定发布另一个问题/答案。 我在Java/Tomcat中运行了一个小型REST JAXRS Web服务，我希望从JSP页面发送命令来启动和停止套接字客户端。到目前为止，我实现了启动插座，但我无法停止它，我做错了什么

编辑1: 我用一个JFrame接口测试了相同的套接字功能（使用相同的类PLC），该接口有两个按钮，一个是连接，另一个是断开，代表其余功能，它可以工作

我的休息功能

NewTen_PLC m_plc = new NewTen_PLC(0x01, "Central Park", "10.80.4.10", 5001);
Thread m_thread;

@PUT
@Path("/connect")
public void Connect(InputStream is)
{       
    System.out.println("CONNECT COMMAND RECEIVED");
    try
    {
        System.out.println( "Starting Executor" );

        //Using thread manager
        //ExecutorService threadExecutor = Executors.newCachedThreadPool();
        //Start Thread
        //threadExecutor.execute(m_plc);            
        //Shutdown working threads when task is complete
        //threadExecutor.shutdown();

        //Using Thread
        m_thread = new Thread(m_plc);
        m_thread.start();

        System.out.println( "Tasks started, main ends.\n" );
    }
    catch(Exception ex)
    {

    }       
}

@PUT
@Path("/disconnect")
public void Disconnect(InputStream is)
{
    System.out.println("DISCONNECT COMMAND RECEIVED");

    try
    {           
        //m_plc.closeConnection();          
                    m_plc.m_bConnected = false;
    }
    catch(Exception ex)
    {
        System.out.println("Error while trying to close socket");
        ex.printStackTrace();
    }       
}

这是包含套接字函数和线程运行方法的类PLC

//--------------------------------------------------------------------------------------------------------
// Run (Thread)
//--------------------------------------------------------------------------------------------------------
@Override
public void run()
{
    try
    {
        //DEBUG
        System.out.printf("\n Thread Started and Running in %s \n", getPLCName());
        //Connect to remote site
        connectToRemoteServer();
        //Set streams
        getStreams();
        //Process connection
        processConnection();
    }
    catch(EOFException eofException)
    {
        System.out.println( "\nClient terminated connection" );     
    }
    catch(IOException ioException)
    {
        ioException.printStackTrace();      
    }
    finally
    {
        closeConnection(); // close connection      
    }
}   
//--------------------------------------------------------------------------------------------------------

//--------------------------------------------------------------------------------------------------------
// Connect to Server/Remote Site
//--------------------------------------------------------------------------------------------------------
private void connectToRemoteServer() throws IOException
{
    //DEBUG
    System.out.println("Attempting connection to site");

    //Get IP Address
    InetAddress ipAddress = InetAddress.getByName(this.getIPAddress());
    //Create and Open Socket to server
    m_clientSocket = new Socket(ipAddress, this.getPort(), null, this.getLocalPort());
    //Set connected
    if(m_clientSocket != null)
        m_bConnected = true;
    //Set read timeout to infinite
    m_clientSocket.setSoTimeout(0);

    //DEBUG
    System.out.println("Connected to site");
}
//--------------------------------------------------------------------------------------------------------

//--------------------------------------------------------------------------------------------------------
// Get in and out Streams
//--------------------------------------------------------------------------------------------------------
private void getStreams() throws IOException
{
    //DEBUG
    System.out.println("Setting Streams");

    //Input data stream
    m_inStream = new DataInputStream(m_clientSocket.getInputStream());
    //Output data stream
    m_outStream = new DataOutputStream(m_clientSocket.getOutputStream());
}
//--------------------------------------------------------------------------------------------------------

//--------------------------------------------------------------------------------------------------------
// Process connection
//--------------------------------------------------------------------------------------------------------
private void processConnection() throws IOException
{
    NewTen_Buffer inBuffer = new NewTen_Buffer(8192);

    try // read message and display it
    {
        while(m_inStream.read() != -1 && m_bConnected == true)      
        {
            //Read 
            inBuffer.m_iSize = m_inStream.read(inBuffer.m_bBuffer);
            //DEBUG                  
            System.out.printf("Data read has %d bytes \n", inBuffer.m_iSize);

            //Decode
            newData(inBuffer);
        }   
            //DEBUG
        System.out.println("OUT OF READING LOOP");  
    } 
    finally
    {

    }
}
//--------------------------------------------------------------------------------------------------------

//--------------------------------------------------------------------------------------------------------
// Close Connection
//--------------------------------------------------------------------------------------------------------
public void closeConnection()
{
    System.out.println( "\nClosing connection" );
    try
    {   
        System.out.println( "\nIn Try closing" );
        m_bConnected = false;
        m_clientSocket.close(); // close socket         
        //System.out.println( "\nClosing Data input streams" );
        //m_inStream.close(); // close output stream
        //m_outStream.close(); // close input stream
        //System.out.println( "\nShutdown ip op" );
        //m_clientSocket.shutdownInput();
        //m_clientSocket.shutdownOutput();
        //System.out.println( "\nClosing socket" );
        //m_clientSocket.close(); // close socket
        System.out.println( "\nEnd of Try closing" );
    }
    catch ( IOException ioException )
    {
        ioException.printStackTrace();
    } // end catch      
}
//--------------------------------------------------------------------------------------------------------  

有什么建议可以阻止它吗

干杯，

---

Leo

我还没有完全阅读所有服务器代码，但我猜您的服务器线程会阻塞等待来自流的连接/输入，因此您无法停止它

---

如果必须使用REST，可以强制终止线程以停止它（我不能保证其含义）。或者另一种方法是实现一个套接字协议来停止服务器——与使用REST相反

Hey mate，感谢您的快速回复，我使用JFrame接口测试了相同的功能，它可以工作，所以我可以停止它（上面的编辑1）。我真的很想让它和REST一起工作，但我会用SOCKET试试。干杯强制杀戮也无济于事。它会抛出一个异常，但不会停止。我想我会遇到连接问题，而不是断开连接：）你是怎么强迫杀人的？您是否尝试在

m_线程上调用
interrupt（）
？是的，我在m_线程上强制执行了一个中断（），并导致此异常严重：在路径为[/NewWebScada]的上下文中，Servlet[NewScada]的Servlet.service（）抛出异常java.lang.NullPointerException，位于com.networkten.webscada.NewTen_PLC.closeConnection（NewTen_PLC.java:287）也许强制杀戮真的有效——只是你没有正确处理NPE。尝试在线程代码上实现一个catch-all来处理它。毕竟，如果你选择不优雅地停止，你必须处理它：）