couchbase lite support with other server

[Raheel Mateen]

Is this possible to use couchbase lite on mobile side and mongo db on backend side ?

[Traun Leyden]

Yes it's theoretically possible, using Bucket Shadowing.  Some code would need to be written first, and nobody has tried this.

On Tue, Sep 30, 2014 at 4:49 AM, Raheel Mateen <raheel...@riksof.com> wrote:

Is this possible to use couchbase lite on mobile side and mongo db on backend side ?

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[Raheel Mateen]

Theoretically or practically ? So as you said it is not possible ?

[Traun Leyden]

It's possible, but what I'm saying is that this doesn't work "out of the box".  

You would need to dig into the Sync Gateway code related to bucket shadowing and adapt it for MongoDB.

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[Jens Alfke]

On Sep 30, 2014, at 4:49 AM, Raheel Mateen <raheel...@riksof.com> wrote:

Is this possible to use couchbase lite on mobile side and mongo db on backend side ?

No. Keep in mind that Couchbase is a for-profit company, the server is our revenue source (enterprise licenses, support contracts, consulting, custom development, etc.) and Mongo is our major competitor.

You can use Apache CouchDB on the back end, largely because the Couchbase Lite architecture and replication protocol are based on CouchDB's so they've been compatible since day one. (You lose a lot of the features you get with Sync Gateway, though, like channels and fine-grained access control.)

On Sep 30, 2014, at 6:28 AM, Traun Leyden <traun....@gmail.com> wrote:

Yes it's theoretically possible, using Bucket Shadowing.  Some code would need to be written first, and nobody has tried this.

I don't think that's what Raheel was asking about. Doing this with bucket shadowing would involve significant development work on the Sync Gateway, and you'd end up running the Gateway and Couchbase Server on the back end, as well as Mongo.

—Jens

[Igor Ievsiukov]

Technically you can write a minimum API needed for replication: _changes feed + CRUD operations as a layer on a top of any database. In my understanding, sync_gateway does exactly the same for Couchbase server (don't mix it with Apache CouchDB!).

But realistically, I hardly see that working well without changing the way you store/operate the data in your current database (that be mongo, myself, oracle or whatever) and if you need to do this, IMHO it will be easier to migrate to Couchbase or CouchDB.

- Igor

[Jens Alfke]

On Oct 1, 2014, at 12:57 AM, Igor Ievsiukov <igor.ie...@gmail.com> wrote:

Technically you can write a minimum API needed for replication: _changes feed + CRUD operations as a layer on a top of any database. In my understanding, sync_gateway does exactly the same for Couchbase server (don't mix it with Apache CouchDB!).

Yup. And speaking from experience, it's one of those things that sounds pretty easy and straightforward until you actually do it. There are a lot of subtleties. (In particular, the CouchDB-style replication protocol needs a lot of extra metadata on documents, like the revision history, so you have to find a place to put that.)

—Jens