Question

我正在使用TcpInBoundGateWay接收来自远程客户端的消息。但问题是客户端定期更改其IP。因此，如果其中一个客户端通过IP＆＃39; X＆＃39;进行通信，则当客户的IP从＆＃39; X＆＃39;更改时，网关将立即与该IP连接。到了＆＃39; Y＆＃39;然后与IP建立新的连接，同时与IP＆＃39; X＆＃39;活跃。所以现在我有大约10-15个客户端与此网关进行通信，但是如果我netstat -all它提供了与该端口建立的2000-2500连接。

有什么方法可以终止那个旧连接吗？

@SpringBootApplication
@IntegrationComponentScan
public class SpringIntegrationApplication extends SpringBootServletInitializer{

    DataOperations dataOperations =new DataOperations();

    @Value("${TCP_PORT}")
    private Integer TCP_PORT;

    public static void main(String[] args) throws IOException {
        ConfigurableApplicationContext ctx = SpringApplication.run(SpringIntegrationApplication.class, args);       
        System.in.read();
        ctx.close();
    }


    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(SpringIntegrationApplication.class);
    }

    private static Class<SpringIntegrationApplication> applicationClass = SpringIntegrationApplication.class;


    @Bean
    TcpNetServerConnectionFactory cf(){
        TcpNetServerConnectionFactory connectionFactory=new TcpNetServerConnectionFactory(8765);

        connectionFactory.setSingleUse(true);

        return new TcpNetServerConnectionFactory(TCP_PORT);
    }

    @Bean
    TcpInboundGateway tcpGate(){

        TcpInboundGateway gateway=new TcpInboundGateway();
        gateway.setConnectionFactory(cf());
        gateway.setRequestChannel(requestChannel());
        gateway.setRequestTimeout(20000);
        return gateway;
    }

    @Bean
    public MessageChannel requestChannel(){

        return new DirectChannel();
    }
}

来自netstat的连接列表

tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 106.221.201.180:15076   ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 27.58.41.100:41965      ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 106.221.136.178:39192   ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 106.221.135.124:2271    ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 27.58.57.252:31644      ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 27.58.33.219:32134      ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 106.221.218.22:17275    ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 27.58.172.42:30130      ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 27.58.21.127:16998      ESTABLISHED
tcp6       0      0 ip-XXX-XX-X-XXX.u:10189 27.58.60.160:51374      ESTABLISHED

Answer 1

这些客户表现不佳。

如果在这段毫秒内没有收到任何数据，您可以connectionFactory.setSoTimeout(...)并关闭连接。

或者，connectionFactory.setSoKeepAlive(true)将导致操作系统（或更恰当的TCP堆栈）发送ping以检测这些死连接并关闭它们。 keepalive之间的实际时间是在操作系统级别配置的，但必须在套接字上启用它们，这就是此选项的作用。

请参阅javadocs for Socket。

Google SO_TIMEOUT和SO_KEEPALIVE了解更多信息。

修改

要显式关闭连接，连接工厂有一个方法...

/** * Close a connection with the specified connection id. * @param connectionId the connection id. * @return true if the connection was closed. */ public boolean closeConnection(String connectionId) { ... }

...您可以从来自客户端的消息（标题ip_connectionId）或通过TcpConnectionOpenEvent打开连接时获取特定的连接ID。您还可以获取当前打开的连接ID列表：

/** * Returns a list of (currently) open {@link TcpConnection} connection ids; allows, * for example, broadcast operations to all open connections. * @return the list of connection ids. */ public List<String> getOpenConnectionIds() { ... }

TcpInboundGateway：如何关闭与远程客户端的现有连接

1 个答案: