1. import java.io.ByteArrayOutputStream;
  2. import java.io.IOException;
  3. import java.util.HashMap;
  4. import java.util.Map;
  6. public class RuntimeArchiver {
  8. /**
  9. * Archives the runtime environment's state for dry-run scenarios.
  10. * @param <T> The type of the environment data.
  11. * @param environmentData A map containing runtime environment data.
  12. * @return A byte array representing the archived environment data.
  13. * @throws IOException If an error occurs during the archiving process.
  14. */
  15. public static byte[] archiveRuntime(Map<String, Object> environmentData) throws IOException {
  16. // Use a ByteArrayOutputStream to store the environment data as bytes.
  17. ByteArrayOutputStream baos = new ByteArrayOutputStream();
  19. // Write the environment data to the output stream.
  20. // Using a simple serialization approach for now. Could use more robust serialization.
  21. ObjectOutputStream oos = new ObjectOutputStream(baos);
  22. oos.writeObject(environmentData);
  23. oos.flush(); //Ensure all data is written
  25. // Convert the byte array to a byte array.
  26. return baos.toByteArray();
  27. }
  29. /**
  30. * Restores the runtime environment from the archived data.
  31. * @param archivedData The byte array containing the archived environment data.
  32. * @return A map containing the restored environment data.
  33. * @throws IOException If an error occurs during the restoration process.
  34. */
  35. public static Map<String, Object> restoreRuntime(byte[] archivedData) throws IOException {
  36. // Use a ByteArrayInputStream to read the archived data.
  37. ByteArrayInputStream bais = new ByteArrayInputStream(archivedData);
  39. // Use an ObjectInputStream to read the environment data from the input stream.
  40. ObjectInputStream ois = new ObjectInputStream(bais);
  41. Map<String, Object> restoredData = (Map<String, Object>) ois.readObject();
  42. ois.close(); // Close input stream
  45. return restoredData;
  46. }
  48. public static void main(String[] args) throws IOException {
  49. //Example Usage
  50. Map<String, Object> runtimeData = new HashMap<>();
  51. runtimeData.put("setting1", "value1");
  52. runtimeData.put("setting2", 123);
  53. runtimeData.put("setting3", true);
  55. //Archive the runtime environment
  56. byte[] archivedData = archiveRuntime(runtimeData);
  57. System.out.println("Archived data size: " + archivedData.length);
  59. //Restore the runtime environment
  60. Map<String, Object> restoredData = restoreRuntime(archivedData);
  61. System.out.println("Restored data: " + restoredData);
  62. }
  63. }

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