I have a simple echo-server in Java:
int portNumber = 4444;
try (
ServerSocket serverSocket =
new ServerSocket(Integer.parseInt(args[0]));
Socket clientSocket = serverSocket.accept();
PrintWriter out =
new PrintWriter(clientSocket.getOutputStream(), true);
BufferedReader in = new BufferedReader(
new InputStreamReader(clientSocket.getInputStream()));
) {
String inputLine;
while ((inputLine = in.readLine()) != null) {
out.println(inputLine);
System.out.println(inputLine);
}
} catch (IOException e) {
System.out.println("Exception caught when trying to listen on port "
+ portNumber + " or listening for a connection");
System.out.println(e.getMessage());
}
and a simple golang client:
func main() {
fmt.Println("start client")
conn, err := net.Dial("tcp", "localhost:4444")
if err != nil {
log.Fatal("Connection error", err)
}
conn.Write([]byte("hello world"))
conn.Close()
fmt.Println("done")
}
When I start the server and then run the client, the server echo's "hello world" as expected but then the server exits/terminates.
Q. How do I prevent this Java termination and force the server to continually wait for more client requests?