Ok, I think we all agree on that. Client implementors can decide whether they call metadata API or not.
Now onto the API itself: I've outlined the proposal in JIRA [1]. Let me know your thoughts. [1] https://issues.apache.org/jira/browse/IGNITE-6258 On Mon, Sep 4, 2017 at 5:06 PM, Dmitriy Setrakyan <dsetrak...@apache.org> wrote: > I think we should support and clearly document both modes, with and without > metadata. > > On Mon, Sep 4, 2017 at 2:06 AM, Pavel Tupitsyn <ptupit...@apache.org> > wrote: > > > In my understanding such objects are completely fine. > > > > Even typeId is not necessary, since we have > > GridBinaryMarshaller.UNREGISTERED_TYPE_ID mode, > > where full type name is included in binary object header. > > > > My testing shows that Ignite works fine with such objects (including > SQL). > > > > Pavel > > > > On Mon, Sep 4, 2017 at 10:40 AM, Vladimir Ozerov <voze...@gridgain.com> > > wrote: > > > > > Igniters, > > > > > > As you probably know, we are working on a new protocol for thin client. > > It > > > would allow users to create integrations with other languages and > > platforms > > > (e.g. Go, R, etc). This protocol should be simple enough, otherwise > > no-one > > > would ever implement anything on top of it. > > > > > > There is a problem with binary object metadata. Currently when we > > serialize > > > objects we check if any new metadata is available, and if yes - we push > > it > > > to the cluster before serialization is finished. This way we always > have > > > metadata for all objects in the cluster. Metadata allow us to implement > > > certain features - introspection (usability) and performance (so called > > > "compact footer" optimization). Bad thing is that metadata management > > would > > > make client implementation much more complex. > > > > > > I feel that in some cases clients might decide not to implement > metadata > > > management for the sake of simplicity. Technically this is very easy - > > just > > > disable "compactFooter" optimization and write field IDs during > > > serialization. But I remember that there were some ideas to deprecate > > > "compactFooter=false" at all. > > > > > > My question is: are fine with idea that objects without metadata will > be > > > normal case in Ignite? > > > > > > Vladimir. > > > > > >
