import java.util.HashMap;

import java.util.Map;

public class HeaderFallback {

private static final Map<String, String> debugHeaders = new HashMap<>();

public static void setDebugHeader(String headerName, String headerValue) {

debugHeaders.put(headerName, headerValue);

}

public static String getDebugHeader(String headerName) {

return debugHeaders.getOrDefault(headerName, null); // Return null if header not found.

}

public static void clearDebugHeaders() {

debugHeaders.clear();

}

// Example usage (can be included in a test or main method)

public static void main(String[] args) {

setDebugHeader("X-Request-ID", "12345");

String requestId = getDebugHeader("X-Request-ID");

System.out.println("X-Request-ID: " + requestId); // Prints: X-Request-ID: 12345

String nonExistentHeader = getDebugHeader("Non-Existent-Header");

System.out.println("Non-Existent-Header: " + nonExistentHeader); // Prints: Non-Existent-Header: null

clearDebugHeaders();

}

}