OpenGraph Attributes in Liferay Integration

Opengraph.java

Map<String, String> opengraphAttributes =
			(Map<String, String>)request.getAttribute(
				"LIFERAY_SHARED_OPENGRAPH");

if (opengraphAttributes == null) {
    opengraphAttributes = new HashMap<String, String>();

    request.setAttribute(
        "LIFERAY_SHARED_OPENGRAPH", opengraphAttributes);
}

opengraphAttributes.put("type", "freezity:event");
opengraphAttributes.put("url", event.getFriendlyURL(themeDisplay));
opengraphAttributes.put("title", event.getTitle());