问题解决方案 应用使用druid连接池,添加以下配置可进行连接池连接保活。 #在1.0.27之前版本,是建议使用TestWhileIdle来保证连接的有效性test-while-idle:true#在1.0.28版本之后,是建议使用keepAlive来保证连接的有效性keep-alive:truevalidation-query: SELECT1 应用使用tomcat连接池,添加以下配置可进行连接池连接保活。
1通过socket类的方法isClosed()、isConnected()、isInputStreamShutdown()、isOutputStreamShutdown()等,这些方法都是本地端的状态,无法判断远端是否已经断开连接。 2通过OutputStream发送心跳消息,如果发送失败就表示远端已经断开连接,类似ping,远端需把正常数据和心跳信息分开。 3通过socket的InputStream.read返回-1/0...
The Socket is not closed in this case. Valid for all sockets: SocketImpl, DatagramSocketImpl See Also: Socket.setSoTimeout(int) ServerSocket.setSoTimeout(int) DatagramSocket.setSoTimeout(int) Constant Field Values SO_SNDBUF @Native static final int SO_SNDBUF Set a hint the size of the ...
} else if (socket.isClosed() || (!socket.isConnected())) { close(); connect(); } } 1. 2. 3. 4. 5. 6. 7. 8. 判断Socket 远程端连接如果关闭的话,就要重建连接。Socket的类提供了一些已经封装好的方法, 如 isClosed()、isConnected()、isInputStreamShutdown()、isOutputStreamShutdown()...
By default, this option is disabled and TCP urgent data received on a socket is silently discarded. OutputStream Returns an output stream for this socket. PeerReference (Inherited from Object) Port Returns the remote port number to which this socket is connected. ReceiveBufferSize Gets the...
判断Socket 远程端连接如果关闭的话,就要重建连接。Socket的类提供了一些已经封装好的方法, 如 isClosed()、isConnected()、isInputStreamShutdown()、isOutputStreamShutdown()等, 在测试时发现,这些方法都是本地端的状态,无法判断远端是否已经断开连接。
Returns the address to which the socket is connected. (Inherited from Socket) InputStream Returns an input stream for this socket. (Inherited from Socket) IsBound Returns the binding state of the socket. (Inherited from Socket) IsClosed Returns the closed state of the socket. (Inherite...
The Socket has been closed. Examples The following code example sets the LingerOption and Send time-out values. C# Copy // Send operations will time-out if confirmation // is not received within 1000 milliseconds. s.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.SendTimeout, 1000)...
Returns whether the read-half of the socket connection is closed. boolean isOutputShutdown() Returns whether the write-half of the socket connection is closed. void sendUrgentData(int data) Send one byte of urgent data on the socket. void setKeepAlive(boolean on) Enable/disable SO_KEEP...
When enabled, aclose(2)orshutdown(2)will not return until all queued messages for the socket have been successfully sent or the linger timeout has been reached. Otherwise, the call returns immediately and the closing is done in the background. When the socket is closed as part ofexit(2)...