default boolean shouldCachePath(String path, @Nullable String query, Route route) {
        return route.pathType() == RoutePathType.EXACT && query == null;
    }
Returns whether the given {@code path} and {@code query} should be cached if the service's result is
successful. By default, exact path mappings with no input query are cached.
core/src/main/java/com/linecorp/armeria/server/Service.java