If you mean the SSI:
http://openmymind.net/Practical-SOA-Hydration-Part-1/
http://openmymind.net/Practical-SOA-Hydration-Part-2/I'm playing with it again on a new project, with a twist. Each item can be heavily personalized. Sticking with the ecomm example, the virgin product might look like
{
"id": "434p",
"name": {"en": "..."},
}
But we want to expand that, per user, with stuff like:
"liked": true,
"bought": "22-1-2015"
We don't want to burden the clients with having to make multiple calls. I'm still working it out, but the services will continue to just return a list of product ids, and the API Gateway will now hydrate both the product and the personalized pieces. Something like:
res = upstream(req)
ids = extractIds(res.Body)
products = getProducts(ids)
personalized = getPersonalized(ids, currentUser)
reply(merge(products, personalized))
Not critical, but worth pointing out that, for me, the API Gateway acts like a gigantic product cache with _every_ product in-memory. When a product changes, it gets an event and updates its cache. It isn't really a "cache", since there's never a miss. Trying to figure out if I can do the same with personalized data. (Even if you have tens millions of product, you can easily store it in memory).
I'm playing with it again on a new project, with a twist. Each item can be heavily personalized. Sticking with the ecomm example, the virgin product might look like
But we want to expand that, per user, with stuff like: We don't want to burden the clients with having to make multiple calls. I'm still working it out, but the services will continue to just return a list of product ids, and the API Gateway will now hydrate both the product and the personalized pieces. Something like: Not critical, but worth pointing out that, for me, the API Gateway acts like a gigantic product cache with _every_ product in-memory. When a product changes, it gets an event and updates its cache. It isn't really a "cache", since there's never a miss. Trying to figure out if I can do the same with personalized data. (Even if you have tens millions of product, you can easily store it in memory).