How to set timeout on BufferedReader and printwriter in Java 1.4?
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Java
How do I set timeouts in BufferedReader and printwriter created using socket connections? This is my code for the server until the server or client crashes:
while(isReceiving){ str = null; BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream())); PrintWriter pw = new PrintWriter(socket.getOutputStream(),true); while ((str = br.readLine()) != null){ System.out.println("Processing command " + str); pw.println(client.message(str)); } }
Outside the scope of this code, I have imposed a socket timeout of 1000ms, which works normally while waiting for the initial connection But the program is blocked in (STR = br. Readline()) If the client hangs or crashes, it will never stop blocking unless I terminate the process (even if it doesn't always work)
The client code is very similar to this and blocks it in a similar way
Solution
You can use Google guava Library's simpletimelimiter
Sample code (in Java 8):
BufferedReader br = ...; TimeLimiter timeLimiter = new SimpleTimeLimiter(); try { String line = timeLimiter.callWithTimeout(br::readLine,10,TimeUnit.SECONDS); } catch (TimeoutException | UncheckedTimeoutException e) { // timed out } catch (Exception e) { // something bad happened while reading the line }
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