CorrelationIdConverter Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/logging/logback/CorrelationIdConverter.java lines 38–63

public class CorrelationIdConverter extends DynamicConverter<ILoggingEvent> {

	private @Nullable CorrelationIdFormatter formatter;

	@Override
	public void start() {
		this.formatter = CorrelationIdFormatter.of(getOptionList());
		super.start();
	}

	@Override
	public void stop() {
		this.formatter = null;
		super.stop();
	}

	@Override
	public String convert(ILoggingEvent event) {
		if (this.formatter == null) {
			return "";
		}
		Map<String, String> mdc = event.getMDCPropertyMap();
		return this.formatter.format(mdc::get);
	}

}