1. import java.io.*;
  2. import java.util.*;
  4. public class JsonMonitor {
  6. private final String configFilePath;
  7. private final List<String> jsonFiles;
  8. private final Map<String, Object> lastState = new HashMap<>(); // Store last known state
  9. private final Set<String> monitoredFiles = new HashSet<>();
  11. public JsonMonitor(String configFilePath) {
  12. this.configFilePath = configFilePath;
  13. loadJsonFiles();
  14. loadConfig();
  15. }
  17. private void loadJsonFiles() {
  18. try (BufferedReader reader = new BufferedReader(new FileReader(configFilePath))) {
  19. String line;
  20. while ((line = reader.readLine()) != null) {
  21. jsonFiles.add(line.trim());
  22. }
  23. } catch (IOException e) {
  24. System.err.println("Error loading JSON files: " + e.getMessage());
  25. }
  26. }
  28. private void loadConfig() {
  29. // Placeholder for config loading - can be extended to load other settings
  30. System.out.println("Config loaded: " + configFilePath);
  31. }
  33. public void startMonitoring() {
  34. for (String jsonFile : jsonFiles) {
  35. monitorFile(jsonFile);
  36. }
  37. }
  39. private void monitorFile(String jsonFile) {
  40. try {
  41. Object state = loadJsonFileContent(jsonFile);
  42. if (!lastState.containsKey(jsonFile) || !lastState.get(jsonFile).equals(state)) {
  43. System.out.println("State changed for file: " + jsonFile);
  44. lastState.put(jsonFile, state);
  45. }
  46. } catch (Exception e) {
  47. System.err.println("Error monitoring file " + jsonFile + ": " + e.getMessage());
  48. }
  49. }
  51. private Object loadJsonFileContent(String filePath) throws IOException {
  52. try (FileReader reader = new FileReader(filePath)) {
  53. // In a real application, you would parse the JSON here.
  54. // This example just reads the file content as a string.
  55. String jsonString = readAllText(reader);
  56. return jsonString;
  57. }
  58. }
  60. private String readAllText(FileReader reader) throws IOException {
  61. StringBuilder sb = new StringBuilder();
  62. int c;
  63. while ((c = reader.read()) != -1) {
  64. sb.append((char) c);
  65. }
  66. return sb.toString();
  67. }
  69. public static void main(String[] args) {
  70. // Example usage
  71. String configFilePath = "config.txt";
  72. JsonMonitor monitor = new JsonMonitor(configFilePath);
  73. monitor.startMonitoring();
  74. }
  75. }

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