1. import java.util.concurrent.ExecutorService;
  2. import java.util.concurrent.Executors;
  3. import java.util.concurrent.Future;
  4. import java.util.concurrent.TimeUnit;
  6. public class TextBlockGuard {
  8. private final ExecutorService executor = Executors.newFixedThreadPool(1); // Single thread for simplicity
  10. /**
  11. * Executes a text block within a guarded environment with graceful failure handling.
  12. *
  13. * @param block The text block to execute.
  14. * @param timeout The maximum time to wait for the block to complete.
  15. * @return The result of the block, or null if it fails or times out.
  16. */
  17. public static String executeTextBlock(String block, long timeout) {
  18. Future<String> future = executor.submit(() -> {
  19. try {
  20. // Simulate potential failure within the text block
  21. if (block.contains("error")) {
  22. throw new RuntimeException("Simulated error in text block");
  23. }
  25. // Execute the text block (replace with your actual execution logic)
  26. return "Text block executed successfully: " + block;
  27. } catch (Exception e) {
  28. System.err.println("Text block failed: " + e.getMessage());
  29. return null; // Indicate failure
  30. }
  31. });
  33. try {
  34. return future.get(timeout, TimeUnit.SECONDS); // Wait for completion with timeout
  35. } catch (Exception e) {
  36. System.err.println("Text block timed out: " + e.getMessage());
  37. return null; // Indicate timeout
  38. } finally {
  39. // Shutdown the executor (important for resource management)
  40. executor.shutdown();
  41. try {
  42. if (!executor.awaitTermination(5, TimeUnit.SECONDS)) {
  43. executor.shutdownNow();
  44. }
  45. } catch (InterruptedException ex) {
  46. executor.shutdownNow();
  47. Thread.currentThread().interrupt();
  48. }
  49. }
  50. }
  52. public static void main(String[] args) {
  53. String block1 = "This is a successful text block.";
  54. String block2 = "This text block contains an error.";
  56. String result1 = executeTextBlock(block1, 5);
  57. System.out.println("Result 1: " + result1);
  59. String result2 = executeTextBlock(block2, 5);
  60. System.out.println("Result 2: " + result2);
  61. }
  62. }

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