[wildfly-dev] update on WildFly NoSQL prototype integration...

[Scott Marlow]

Hi,

Below is an update on the WildFly NoSQL integration project.  The goal 
is for deployed applications to have access to NoSQL databases (via 
Hibernate OGM or native APIs).  Items 1-4, should be finished in our 
first pass, with as much of the others items as we can do as well.

1. connection management will deal with obtaining NoSQL connections for 
application use.

  - borrow/share Hibernate OGM connection configuration setup code
  - authentication integration
  - support transport level security

2. CDI programming simplifications will make it easy to inject NoSQL 
data into your application classes.

  - https://github.com/antoinesd/javaee-nosql is initial idea

3. You will easily get a native NoSQL connection from the specified 
NoSQL profile and use the native NOSQL (Cassandra/MongoDB/other) API in 
your application.

4. You will also be able to easily use Hibernate OGM with the defined 
NoSQL profiles (exactly how is TBD but will be awesome :-).
  - Hibernate OGM static module is included.
  - need to align with OGM dependencies (e.g. Hibernate ORM + other 
dependencies).
  - as mentioned above, OGM already has some connection setup code, 
which might be good to share for WildFly + standalone NoSQL use.
  - once WildFly has a common NoSQLSource (not a DataSource) that OGM 
can use, OGM will be enhanced to use it.

5. How best for the WildFly NoSQL subsystem to be optional?
  - Is it enough to not run the wildfly/testsuite/nosql tests by default?
  - Or do we need to start a separate https://github.com/wildfly/nosql 
project for the NoSQL subsystems?

6. transaction enlistment

7. compensating transactions

8. runtime application monitoring

9. How soon can we make an evaluation distribution available for use on 
OpenStack/OpenShift?
  - Would be great if we could do some load testing with all NoSQL 
components.
  - Would be great if we could enable others to also test.

10. Are there any problems with our WildFly NoSQL subsystem injecting 
MongoDatabase connections via:

    @Resource(lookup = "java:jboss/mongodb/test") MongoDatabase db;

  - No @Resource support expected for standalone Java, TBD is whether a 
runtime library can be used.
  - Any problems expected on other EE application servers if this 
approach becomes popular?

11. WIP topic branch is at 
https://github.com/scottmarlow/wildfly/tree/nosql-dev9.  Note that every 
once in a while, commits are squashed and pushed to nosql-devN+1.

12. Add proper unit tests
  - multi-threaded NoSQL access to show that works at all.
  - use NoSQL from different EE components (e.g. JAX-RS).
  - other use cases that represent how NoSQL could be used from WildFly.

Feedback/help is welcome!

Thanks,
Scott