Class JsonFormatter

java/org/apache/juli/JsonFormatter.java:39–203

Provides the same information as the one line format but using JSON formatting. All the information of the LogRecord is included as a one line JSON document, including the full stack trace of the associated exception if any. The LogRecord is mapped as attributes: time: the log record ti

 * </ul>
 */
public class JsonFormatter extends OneLineFormatter {

    private static final String DEFAULT_TIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss.SSSX";

    /**
     * Constructs a new JsonFormatter.
     */
    public JsonFormatter() {
        String timeFormat = LogManager.getLogManager().getProperty(JsonFormatter.class.getName() + ".timeFormat");
        if (timeFormat == null) {
            timeFormat = DEFAULT_TIME_FORMAT;
        }
        setTimeFormat(timeFormat);
    }

    @Override
    public String format(LogRecord record) {
        StringBuilder sb = new StringBuilder();
        sb.append('{');

        // Timestamp
        sb.append("\"time\": \"");
        addTimestamp(sb, record.getMillis());
        sb.append("\", ");

        // Severity
        sb.append("\"level\": \"");
        sb.append(record.getLevel().getLocalizedName());
        sb.append("\", ");

        // Thread
        sb.append("\"thread\": \"");
        sb.append(resolveThreadName(record));
        sb.append("\", ");

        // Source
        sb.append("\"class\": \"");
        sb.append(record.getSourceClassName());
        sb.append("\", ");
        sb.append("\"method\": \"");
        sb.append(record.getSourceMethodName());
        sb.append("\", ");

        // Message
        sb.append("\"message\": \"");
        sb.append(JSONFilter.escape(formatMessage(record)));

        Throwable t = record.getThrown();
        if (t != null) {
            sb.append("\", ");

            // Stack trace
            sb.append("\"throwable\": [");
            boolean first = true;
            do {
                if (!first) {
                    sb.append(',');
                } else {