/**
 * If there's a retry template, it will set the attributes holder via the listener. If
 * there's no retry template, but there's an error channel, we create a new attributes
 * holder here. If an attributes holder exists (by either method), we set the
 * attributes for use by the {@link ErrorMessageStrategy}.
 * @param message the Spring Messaging message to use.
 */
private void setAttributesIfNecessary(Message<?> message) {
	boolean needHolder = this.errorChannel != null && this.retryTemplate == null;
	boolean needAttributes = needHolder || this.retryTemplate != null;
	if (needHolder) {
		attributesHolder.set(ErrorMessageUtils.getAttributeAccessor(null, null));
	}
	if (needAttributes) {
		AttributeAccessor attributes = attributesHolder.get();
		if (attributes != null) {
			attributes.setAttribute(ErrorMessageUtils.INPUT_MESSAGE_CONTEXT_KEY,
					message);
			if (this.attributesProvider != null) {
				this.attributesProvider.accept(attributes, message);
			}
		}
	}
}
 

public void setAttributesProvider(
		BiConsumer<AttributeAccessor, Message<?>> attributesProvider) {
	this.attributesProvider = attributesProvider;
}