Created
March 16, 2024 00:20
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visual cron logs replayer simulator
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| package demo; | |
| import java.io.BufferedReader; | |
| import java.io.FileReader; | |
| import java.io.IOException; | |
| import java.text.ParseException; | |
| import java.text.SimpleDateFormat; | |
| import java.util.Date; | |
| import java.util.regex.Matcher; | |
| import java.util.regex.Pattern; | |
| import java.time.ZoneId; | |
| import java.util.TimeZone; | |
| import org.slf4j.Logger; | |
| import org.slf4j.LoggerFactory; | |
| public class Application { | |
| private static final String TZ = "UTC"; | |
| private static Logger logger = LoggerFactory.getLogger(Application.class); | |
| public static void main(String[] args) throws InterruptedException, IOException { | |
| String filePath = System.getenv("LOG_FILE_PATH"); // export LOG_FILE_PATH=/mnt/c/Users/alain/Downloads/log_server20240312.txt | |
| String content = simulateFile(filePath); | |
| String contentLines[] = content.split("\n"); | |
| while (true) { | |
| Thread.sleep(15000); | |
| logger.debug("Starting from scratch ..."); | |
| for (String line : contentLines) { | |
| String[] elements=line.split("\t"); | |
| String timestamp = elements[0]; | |
| String level = elements[1]; | |
| String message = elements[2]; | |
| SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss"); | |
| dateFormat.setTimeZone(TimeZone.getTimeZone(TZ)); | |
| Date parsedDate; | |
| try { | |
| parsedDate = dateFormat.parse(timestamp); | |
| long secondsOfDay = parsedDate.toInstant().atZone(ZoneId.of(TZ)).toLocalTime().toSecondOfDay(); | |
| long currentSecondsOfDay = (new Date()).toInstant().atZone(ZoneId.of(TZ)).toLocalTime() | |
| .toSecondOfDay(); | |
| logger.debug("timestamp: " + timestamp + " // " + parsedDate); | |
| logger.debug("Log Seconds of Today: " + secondsOfDay + "// Current Seconds of Today: " | |
| + currentSecondsOfDay); | |
| while (currentSecondsOfDay < secondsOfDay) { | |
| logger.debug("Log Seconds of Today: " + secondsOfDay); | |
| logger.debug("Current Seconds of Today: " + currentSecondsOfDay); | |
| Thread.sleep(2000); | |
| currentSecondsOfDay = (new Date()).toInstant().atZone(ZoneId.of(TZ)).toLocalTime() | |
| .toSecondOfDay(); | |
| } | |
| logger.debug("Processing line: " + line); | |
| if (level.equals("Err")) { | |
| logger.error(message); | |
| } else if (level.equals("Debug")) { | |
| logger.debug(message); | |
| } else{ | |
| logger.info(message); | |
| } | |
| } catch (ParseException e) { | |
| e.printStackTrace(); | |
| } | |
| } | |
| } | |
| } | |
| public static String simulateFile(String filePath) throws IOException { | |
| StringBuilder content = new StringBuilder(); | |
| try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) { | |
| String line; | |
| int i = 0; | |
| while ((line = reader.readLine()) != null) { | |
| String pattern = "\\d{2}/\\d{2}/\\d{4} \\d{2}:\\d{2}:\\d{2}"; | |
| Pattern regex = Pattern.compile(pattern); | |
| Matcher matcher = regex.matcher(line); | |
| if (matcher.find()) { | |
| if (i > 0) { | |
| content.append("\n"); | |
| } | |
| content.append(line); | |
| } else { | |
| content.append(" " + line); | |
| } | |
| i++; | |
| } | |
| } | |
| return content.toString(); | |
| } | |
| } |
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