private StringBuilder toText()

in log4j-core/src/main/java/org/apache/logging/log4j/core/layout/GelfLayout.java [673:753]
79 lines of code
20 McCabe index (conditional complexity)

    private StringBuilder toText(final LogEvent event, final StringBuilder builder, final boolean gcFree) {
        builder.append('{');
        builder.append("\"version\":\"1.1\",");
        builder.append("\"host\":\"");
        JsonUtils.quoteAsString(toNullSafeString(host), builder);
        builder.append(QC);
        builder.append("\"timestamp\":")
                .append(formatTimestamp(event.getTimeMillis()))
                .append(C);
        builder.append("\"level\":").append(formatLevel(event.getLevel())).append(C);
        if (event.getThreadName() != null) {
            builder.append("\"_thread\":\"");
            JsonUtils.quoteAsString(event.getThreadName(), builder);
            builder.append(QC);
        }
        if (event.getLoggerName() != null) {
            builder.append("\"_logger\":\"");
            JsonUtils.quoteAsString(event.getLoggerName(), builder);
            builder.append(QC);
        }
        if (additionalFields.length > 0) {
            final StrSubstitutor strSubstitutor = getConfiguration().getStrSubstitutor();
            for (final KeyValuePair additionalField : additionalFields) {
                final String value = valueNeedsLookup(additionalField.getValue())
                        ? strSubstitutor.replace(event, additionalField.getValue())
                        : additionalField.getValue();
                if (Strings.isNotEmpty(value) || !omitEmptyFields) {
                    builder.append(QU);
                    JsonUtils.quoteAsString(additionalField.getKey(), builder);
                    builder.append("\":\"");
                    JsonUtils.quoteAsString(toNullSafeString(value), builder);
                    builder.append(QC);
                }
            }
        }
        if (includeThreadContext) {
            event.getContextData().forEach(mdcWriter, builder);
        }
        if (includeMapMessage && event.getMessage() instanceof MapMessage) {
            ((MapMessage<?, Object>) event.getMessage()).forEach((key, value) -> mapWriter.accept(key, value, builder));
        }

        if (event.getThrown() != null || layout != null) {
            builder.append("\"full_message\":\"");
            if (layout != null) {
                final StringBuilder messageBuffer = getMessageStringBuilder();
                layout.serialize(event, messageBuffer);
                JsonUtils.quoteAsString(messageBuffer, builder);
            } else if (includeStacktrace) {
                JsonUtils.quoteAsString(formatThrowable(event.getThrown()), builder);
            } else {
                JsonUtils.quoteAsString(event.getThrown().toString(), builder);
            }
            builder.append(QC);
        }

        builder.append("\"short_message\":\"");
        final Message message = event.getMessage();
        if (message instanceof CharSequence) {
            JsonUtils.quoteAsString(((CharSequence) message), builder);
        } else if (gcFree && message instanceof StringBuilderFormattable) {
            final StringBuilder messageBuffer = getMessageStringBuilder();
            try {
                ((StringBuilderFormattable) message).formatTo(messageBuffer);
                JsonUtils.quoteAsString(messageBuffer, builder);
            } finally {
                trimToMaxSize(messageBuffer);
            }
        } else {
            JsonUtils.quoteAsString(toNullSafeString(message.getFormattedMessage()), builder);
        }
        builder.append(Q);
        builder.append('}');
        if (includeNullDelimiter) {
            builder.append(NUL);
        }
        if (includeNewLineDelimiter) {
            builder.append(LF);
        }
        return builder;
    }