1. import java.io.File;
  2. import java.util.HashMap;
  3. import java.util.Map;
  5. public class LogFileParameterInjector {
  7. private static final String DEFAULT_LOG_FILE = "default.log";
  8. private static final String DEVELOPMENT_LOG_FILE_PREFIX = "dev_";
  10. /**
  11. * Injects parameters from log files. Handles file not found gracefully.
  12. *
  13. * @param params A map of parameter names to default values.
  14. * @return A map of parameter names to the injected values. Returns the original params if any file is not found.
  15. */
  16. public static Map<String, String> injectParameters(Map<String, String> params) {
  17. Map<String, String> injectedParams = new HashMap<>(params); // Create a copy to avoid modifying the original
  19. for (Map.Entry<String, String> entry : params.entrySet()) {
  20. String paramName = entry.getKey();
  21. String defaultValue = entry.getValue();
  23. String logFileName = DEVELOPMENT_LOG_FILE_PREFIX + paramName + ".log";
  24. File logFile = new File(logFileName);
  26. try {
  27. String fileContent = FileUtils.readUtf8FileContent(logFile); // Assuming FileUtils.readUtf8FileContent is available or implement it
  28. if (fileContent != null && !fileContent.isEmpty()) {
  29. injectedParams.put(paramName, fileContent.trim());
  30. }
  31. } catch (Exception e) {
  32. // Log file not found or error reading. Keep the default value.
  33. System.err.println("Log file not found or error reading for " + logFileName + ". Using default value.");
  34. }
  35. }
  37. return injectedParams;
  38. }
  40. //Helper class for reading file content
  41. static class FileUtils {
  42. public static String readUtf8FileContent(File file) throws Exception {
  43. return java.nio.file.Files.readString(file.toPath(), java.nio.charset.StandardCharsets.UTF_8);
  44. }
  45. }
  46. }

Add your comment