Hi Luca,
we use the old OGraphDatabase API to create a new fresh graph database if
it does not exists when our application starts.
db = new OGraphDatabase( "plocal:" + dbPath ) ;
if (!db.exists()) {
info("DB does not exist, BaasBox will create a new one");
db.create();
}
As far I know the OrientGraph API hasn't got the exists() method, on the
contrary, its constructor raises an error if the specified DB does not
exists.
Any advice on this?
Furthermore we use it to create vertices:
ODocument vertex = db.createVertex(CLASS_VERTEX_NAME);
Inspecting the OrientGraph API, I cannot find a similar API. I just found
the addVertex(iClassName, iClusterName) that accepts two parameters instead
of just the class name
Thanks,
Claudio
Il giorno mercoledì 29 gennaio 2014 11:26:21 UTC+1, Lvc@ ha scritto:
>
> Hi all,
> we're very close to merge the new storage structure to the 1.7 branch.
> Andrey has some *awesome numbers *about the performance of the new engine
> in terms of benchmarks, he will share them with us on this group very soon.
>
> But in order to complete the merge, we should *remove the old Graph API:
> OGraphDatabase*! This is mainly for 2 big reasons:
>
> 1. it's not compatible with *Lightweight* edges and other improvements
> we introduced since version 1.4.x
> 2. it heavily uses *MVRB-Tree indexes* so it wouldn't scale on the new
> storage structure
>
> So after a while we deprecated the old Graph API, it's time to removed it
> from the v1.7 code base. I know some users are still sticked with this API,
> they can decide to:
>
> 1. Migrate to the Blueprints API (well documented on OrientDB &
> TinkerPop sites)
> 2. Stay with old API and remain sticked to last OrientDB v1.6.x.
>
> Obviously we strongly suggest 1st solution!
>
> For the users want to migrate we will provide a new guide to migrate the
> old code (very easy, most of the concepts are the same). In this way they
> could benefits of HUGE improvement with last version of OrientDB, specially
> with big databases.
>
> Any comments are welcome :-)
>
> Lvc@
>
>
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