How to interrupt BufferedReader’s readLine

by

Without closing the socket:

The difficult problem isn’t the BufferedReader.readLine, but the underlying read. If a thread is blocked reading, the only way to get it going is to supply some actual data or close the socket (interrupting the thread probably should work, but in practice does not).

So the obvious solution is to have two threads. One that reads the raw data, and will remain blocked. The second, will be the thread calling readLine. Pipe data from the first the second. You then have access to a lock than can be used to wakeup the second thread, and have it take appropriate action.

There are variations. You could have the first thread using NIO, with a single thread instance shared between all consumers.

Alternatively you could write a readLine that works with NIO. This could even take a a relatively simple single-threaded form, as Selector.wakeup exists and works.

More Related Contents:

  1. How to properly stop the Thread in Java?
  2. Why is spawning threads in Java EE container discouraged?
  3. wait until all threads finish their work in java
  4. When would you call java’s thread.run() instead of thread.start()?
  5. Updating UI from different threads in JavaFX
  6. How to demonstrate java multithreading visibility problems?
  7. How to get the ThreadPoolExecutor to increase threads to max before queueing?
  8. How does memory reordering help processors and compilers?
  9. Refreshing GUI by another thread in java (swing)
  10. Printing Even and Odd using two Threads in Java
  11. How does Java makes use of multiple cores?
  12. How to debug a multi-threaded app in IntelliJ?
  13. Android – Prevent white screen at startup
  14. When should I use a CompletionService over an ExecutorService?
  15. Busy loop in other thread delays EDT processing
  16. Multiple bouncing balls thread issue
  17. Why do InterruptedExceptions clear a thread’s interrupted status?
  18. How do I prove programmatically that StringBuilder is not threadsafe?
  19. When does a Java Thread reach the ‘Die’ State
  20. How does the event dispatch thread work?
  21. Which concurrent Queue implementation should I use in Java?
  22. AsyncTask.executeOnExecutor() before API Level 11
  23. How does the JVM terminate daemon threads? or How to write daemon threads that terminate gracefully
  24. Run Handler messages in a background thread
  25. Regarding thread safety of servlet [duplicate]
  26. Stopping a specific java thread
  27. notifyAll() throws IllegalMonitorStateException
  28. Will a chain of method calls (CompletableFuture API) execute asynchronously if the first method in a chain is asynchronous?
  29. Concurrent read/write of named pipe in Java (on windows)
  30. If a synchronized method calls another non-synchronized method, is there a lock on the non-synchronized method

Leave a Comment