MutuallyExclusiveConfigurationPropertiesFailureAnalyzer Class — spring-boot Architecture

Source Code

core/spring-boot/src/main/java/org/springframework/boot/diagnostics/analyzer/MutuallyExclusiveConfigurationPropertiesFailureAnalyzer.java lines 48–135

class MutuallyExclusiveConfigurationPropertiesFailureAnalyzer
		extends AbstractFailureAnalyzer<MutuallyExclusiveConfigurationPropertiesException> {

	private final @Nullable ConfigurableEnvironment environment;

	MutuallyExclusiveConfigurationPropertiesFailureAnalyzer(@Nullable Environment environment) {
		this.environment = (ConfigurableEnvironment) environment;
	}

	@Override
	protected @Nullable FailureAnalysis analyze(Throwable rootFailure,
			MutuallyExclusiveConfigurationPropertiesException cause) {
		List<Descriptor> descriptors = new ArrayList<>();
		for (String name : cause.getConfiguredNames()) {
			List<Descriptor> descriptorsForName = getDescriptors(name);
			if (descriptorsForName.isEmpty()) {
				return null;
			}
			descriptors.addAll(descriptorsForName);
		}
		StringBuilder description = new StringBuilder();
		appendDetails(description, cause, descriptors);
		return new FailureAnalysis(description.toString(),
				"Update your configuration so that only one of the mutually exclusive properties is configured.",
				cause);
	}

	private List<Descriptor> getDescriptors(String propertyName) {
		return getPropertySources().filter((source) -> source.containsProperty(propertyName))
			.map((source) -> Descriptor.get(source, propertyName))
			.toList();
	}

	private Stream<PropertySource<?>> getPropertySources() {
		if (this.environment == null) {
			return Stream.empty();
		}
		return this.environment.getPropertySources()
			.stream()
			.filter((source) -> !ConfigurationPropertySources.isAttachedConfigurationPropertySource(source));
	}

	private void appendDetails(StringBuilder message, MutuallyExclusiveConfigurationPropertiesException cause,
			List<Descriptor> descriptors) {
		descriptors.sort(Comparator.comparing((descriptor) -> descriptor.propertyName));
		message.append(String.format("The following configuration properties are mutually exclusive:%n%n"));
		sortedStrings(cause.getMutuallyExclusiveNames())
			.forEach((name) -> message.append(String.format("\t%s%n", name)));
		message.append(String.format("%n"));
		message.append(
				String.format("However, more than one of those properties has been configured at the same time:%n%n"));
		Set<String> configuredDescriptions = sortedStrings(descriptors,
				(descriptor) -> String.format("\t%s%s%n", descriptor.propertyName,
						(descriptor.origin != null) ? " (originating from '" + descriptor.origin + "')" : ""));
		configuredDescriptions.forEach(message::append);
	}

	private Set<String> sortedStrings(Collection<String> input) {
		return sortedStrings(input, Function.identity());
	}

	private <S> Set<String> sortedStrings(Collection<S> input, Function<S, String> converter) {
		TreeSet<String> results = new TreeSet<>();
		for (S item : input) {
			results.add(converter.apply(item));
		}
		return results;
	}

	private static final class Descriptor {

		private final String propertyName;

		private final @Nullable Origin origin;

		private Descriptor(String propertyName, @Nullable Origin origin) {
			this.propertyName = propertyName;
			this.origin = origin;
		}

		static Descriptor get(PropertySource<?> source, String propertyName) {
			Origin origin = OriginLookup.getOrigin(source, propertyName);
			return new Descriptor(propertyName, origin);
		}

	}

}