Done.

https://issues.apache.org/jira/browse/OFBIZ-4153

Raj

On Friday 28 January 2011 01:07 PM, Adrian Crum wrote:
There is no doubt there will be problems. We can tackle them one at a time in a Jira issue.

I wasn't aware that entity-ext depends on the service engine. Maybe a Jira sub-task could break that dependency.

I think the entityengine.xml file issue can be resolved through standard Java resource loader methods. In other words, applications will name their XML files according to a pre-defined format, and the entity-engine jar file will find and load all matching XML files. Just think of them as a resource file. Again - these details should be discussed further in a Jira issue.

-Adrian


On 1/27/2011 11:23 PM, Raj Saini wrote:
I tried to use the entity engine exactly the way you have described. I faced the problems as entity engine depends entity-ext (for some cache management) and entity-ext depends on service engine. If we resolve this dependency, entity engine can certainly be a standalone jar and as you said it can be packaged as OSGi bundle. We will also need to take care of entityengine.xml configuration so that it can be loaded from a pre-defined location instead of a classpath.

Raj

On Friday 28 January 2011 12:28 PM, Adrian Crum wrote:
I was picturing the entity engine as a lower level artifact - like a jar file. I don't have all of the details worked out yet, but what I picture is this:

1. An application needs a database-agnostic data store.
2. The application accesses the data store though the entity engine API/ jar library.

Ofbiz has a very convenient way of defining databases, tables, and views as XML files. Plus, it has the ability to create/modify table/index structures during start-up. I believe that would be a very handy tool for anyone wanting to create any application that requires data storage.

Wrapping the entity engine jar file in an OSGI bundle would be trivial.

If anyone is interested in exploring this further, then they should create a Jira issue and we can take it from there.

-Adrian

On 1/27/2011 10:21 PM, Raj Saini wrote:
I will certainly be glad to help in this. I had re-packaged the entity engine as and OSGi bundle and exposed the delegator as osgi service. I found minor issues like loading of entityengine.xml from classpath and this did not go well with the OSGi. Let us wait for the the restructuring of the OFBiz project.

Thanks,

Raj

On Friday 28 January 2011 10:58 AM, Adrian Crum wrote:
Cool. If anyone is interested in working on that, I am available to help.

-Adrian

On 1/27/2011 9:23 PM, Raj Saini wrote:
Yes, I agree. Entity Engine and Service Engine are two such marvellous pieces of technologies. Entity engine can very well compete with Java Persistence API (JPA) if it is separated from the OFBiz runtime.

Raj

On Friday 28 January 2011 10:26 AM, Adrian Crum wrote:
I have suggested that in the past. OFBiz has spawned some great technology that, if modified to be stand-alone subsystems, could be their own projects.

-Adrian

On 1/27/2011 8:52 PM, Raj Saini wrote:
One thing I would like to see is to use the OSGi runtime for framework. This will help modularising efforts. For example entity engine, service engine, security etc. will be OSGi bundles running on top of OSGi framework such Apache Karaf. Apache ServiceMix is already using Karaf (http://karaf.apache.org). I did a prototype and embedded the OFBiz in OSGi runtime (http://sourceforge.net/projects/ofbiz-osgi/) and it worked well.

Thanks,

Raj

On Thursday 27 January 2011 03:01 PM, Pierre Smits wrote:
Hi All,

This thread is about where you want the community to go with the underlying
core components of OFBiz (aka the Framework).

The framework is the enables of all applications and business processes and users of the product. It is about security, and about a future proof and
reliable platform for developing applications on.

What do feel is important? What should be removed from the framework. what
should be included? What can be enhanced? And what not?

Please let all of us know what you think is important regarding the framework so that we (the community) can take stock and draw up a plan for
comming releases.

Regards,

Pierre










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