DeferredLogs Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/logging/DeferredLogs.java lines 36–95

public class DeferredLogs implements DeferredLogFactory {

	private final Lines lines = new Lines();

	private final List<DeferredLog> loggers = new ArrayList<>();

	/**
	 * Create a new {@link DeferredLog} for the given destination.
	 * @param destination the ultimate log destination
	 * @return a deferred log instance that will switch to the destination when
	 * appropriate.
	 */
	@Override
	public Log getLog(Class<?> destination) {
		return getLog(() -> LogFactory.getLog(destination));
	}

	/**
	 * Create a new {@link DeferredLog} for the given destination.
	 * @param destination the ultimate log destination
	 * @return a deferred log instance that will switch to the destination when
	 * appropriate.
	 */
	@Override
	public Log getLog(Log destination) {
		return getLog(() -> destination);
	}

	/**
	 * Create a new {@link DeferredLog} for the given destination.
	 * @param destination the ultimate log destination
	 * @return a deferred log instance that will switch to the destination when
	 * appropriate.
	 */
	@Override
	public Log getLog(Supplier<Log> destination) {
		synchronized (this.lines) {
			DeferredLog logger = new DeferredLog(destination, this.lines);
			this.loggers.add(logger);
			return logger;
		}
	}

	/**
	 * Switch over all deferred logs to their supplied destination.
	 */
	public void switchOverAll() {
		synchronized (this.lines) {
			for (Line line : this.lines) {
				line.getLevel().log(line.getDestination(), line.getMessage(), line.getThrowable());
			}
			for (DeferredLog logger : this.loggers) {
				logger.switchOver();
			}
			this.lines.clear();
		}

	}

}