1. import java.util.concurrent.ExecutorService;
  2. import java.util.concurrent.Executors;
  3. import java.util.concurrent.TimeUnit;
  4. import java.util.concurrent.TimeoutException;
  6. public class HypothesisValidator {
  8. private static final int MAX_RETRIES = 3;
  9. private static final long RETRY_DELAY_MS = 1000; // 1 second
  11. private final HypothesisValidatorExecutor executor;
  13. public HypothesisValidator() {
  14. executor = Executors.newFixedThreadPool(2); // Adjust thread pool size as needed
  15. }
  17. public HypothesisValidationResult validateHypothesis(String hypothesis) {
  18. int retryCount = 0;
  19. while (retryCount < MAX_RETRIES) {
  20. try {
  21. // Attempt to validate the hypothesis
  22. HypothesisValidationResult result = validateHypothesisInternal(hypothesis);
  23. return result; // Success!
  24. } catch (Exception e) {
  25. retryCount++;
  26. if (retryCount < MAX_RETRIES) {
  27. System.err.println("Validation failed. Retrying in " + RETRY_DELAY_MS + "ms. Attempt: " + retryCount);
  28. try {
  29. TimeUnit.MILLISECONDS.sleep(RETRY_DELAY_MS);
  30. } catch (InterruptedException ie) {
  31. Thread.currentThread().interrupt(); // Restore interrupted state
  32. // Handle interruption appropriately (e.g., log, re-throw)
  33. return new HypothesisValidationResult(null, "Retry interrupted");
  34. }
  35. } else {
  36. System.err.println("Max retries reached. Validation failed.");
  37. return new HypothesisValidationResult(null, "Max retries reached");
  38. }
  39. }
  40. }
  41. return new HypothesisValidationResult(null, "Unexpected error during validation."); //Fallback
  42. }
  45. private HypothesisValidationResult validateHypothesisInternal(String hypothesis) throws Exception {
  46. // Simulate a hypothesis validation process (replace with actual logic)
  47. // In a real application, this would involve calling an external service or performing complex calculations.
  48. // Here, we simulate a potential failure.
  49. if (hypothesis.contains("error")) {
  50. throw new Exception("Simulated validation error for hypothesis: " + hypothesis);
  51. }
  52. // Simulate successful validation
  53. return new HypothesisValidationResult(true, "Hypothesis validated successfully: " + hypothesis);
  54. }
  56. public void shutdown() {
  57. executor.shutdown();
  58. try {
  59. executor.awaitTermination(60, TimeUnit.SECONDS); // Wait for tasks to complete
  60. } catch (InterruptedException e) {
  61. Thread.currentThread().interrupt(); // Restore interrupted state
  62. }
  63. }
  65. // Inner class to encapsulate the result of the validation
  66. public static class HypothesisValidationResult {
  67. public final boolean isValid;
  68. public final String message;
  70. public HypothesisValidationResult(boolean isValid, String message) {
  71. this.isValid = isValid;
  72. this.message = message;
  73. }
  74. }
  76. //ExecutorService wrapper for managing threads.
  77. static class HypothesisValidatorExecutor extends ExecutorService {
  78. public HypothesisValidatorExecutor(int corePoolSize) {
  79. super(corePoolSize);
  80. }
  81. }
  85. public static void main(String[] args) {
  86. HypothesisValidator validator = new HypothesisValidator();
  88. String hypothesis1 = "This hypothesis is valid.";
  89. String hypothesis2 = "This hypothesis contains an error.";
  91. HypothesisValidationResult result1 = validator.validateHypothesis(hypothesis1);
  92. System.out.println("Result 1: " + result1.message);
  94. HypothesisValidationResult result2 = validator.validateHypothesis(hypothesis2);
  95. System.out.println("Result 2: " + result2.message);
  97. validator.shutdown();
  98. }
  99. }

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