August 2014 - jbpm-dev - Jboss List Archives

Re: [jbpm-dev] [rules-dev] services registered by OSGi bundle activators of Kie, Drools and Jbpm are still needed ?

by Charles Moulliard

Hi, Before to review the code, it could be interesting to define/describe in a document the services/factories that we need to work with Drools/BPMN, dependencies between the modules/jar (= Packages to be exported/imported) and next we could see how we could improve the design of what has been done for OSGI. Aries Blueprint could be used or Apache DS to inject dependency (less code and dependencies are needed vs Blueprint) but Weld/CDI is also another option since that pax-cdi has been released but I should have a look to verify stability, ... Regards, Charles On Wed, Aug 20, 2014 at 3:05 AM, Mark Proctor <mproctor(a)codehaus.org> wrote: > One point to remember is that OSGI Activators did not work out of the box > for optional runtime plugins. Which is why we had to use custom trackers, > look at how the decision tables stuff is done. We’d need to see if the > blueprints approach can solve this problem. > > We should also move this chat over to the new google groups :) > > Mark > On 18 Aug 2014, at 17:44, Cristiano Gavião <cvgaviao(a)gmail.com> wrote: > > Kris and Mark, > > I passed this morning analyzing the activators... I'm attaching a sheet > where I added all Activators being used by Kie, JBPM and Drools. Note that > where I marked with red I saw "signs of smell things" and added a comment... > > below I write the reasons I think that we should to remove completely > those activators... > > On 18-08-2014 07:28, Kris Verlaenen wrote: > > Cristiano, > > Cristiano Gavião schreef op 15/08/2014 17:02: > > Hi, > > has a long time that I don't play with Drools and JBPM source code. This > week I was walking through them again and saw a lot of new elements, > interfaces and new ways to setup things. > > I saw that some Blueprint specific annotations and classes were created > (kie-aries-blueprint). > But the existent osgi activators are still registering some services > that seems not be appropriated anymore. at least they are different from > the set of elements in blueprint namespace (environment, kmodule, kbase > and others ) that I saw. > > For example, in activator of drools-core we have a > KnowledgeBaseFactoryServiceImpl being registered. in drools-compiler we > have KnowledgeBuilderFactoryServiceImpl being registered. > > I can't use blueprint, so I need to figure out what is the best setup > workflow for OSGi and get the proper services registered. > > Question, is the kie-aries-blueprint.xsd reflecting the actual state of > kie, drools and jbpm core setup workflow, so I can use it as start point? > > could someone check that and give me a feedback ? > > It is true that using factories isn't always trivial in OSGi, > > well, in reality static factory is not recommended at all in osgi. just > because normally it is implemented adding a strong "dependency" between API > and one Implementation. and that is against modularity that OSGi preaches. > In those scenarios in order to change an implementation almost all the > times you will need to change the api also. > > I saw the addition of ServiceRegistryImpl to concentrate the services > without a DI. that would reduced a bit this problem (btw, I saw some > factories where it isn't being used yet: org.kie.api.KieServices) but not > all... to me the best solution for non-osgi to separate API from > Implementor still is JavaSE Service Locator. > > so the activators you are referring to are used (internally) to do > additional registration for OSGi. They should be working and are required > when using OSGi. > > Maybe those activators used to be required and useful (internally) some > day. But currently, I don't think they are needed anymore. > > The reasons I think they should be removed: > > First, there many services being registered using interfaces from non-API > packages; > > Second, the focus of RedHat seems to be Fusion/ Karaf and they already use > blueprint natively. > > Third, there are a project exclusive for blueprint based setup, so doesn't > make any sense to me to use ServiceTracker and register things "by hand in > activator" and then complement that using blueprint. Why not just use > blueprint ?? > > Fourth, we can't use one of the most useful features of OSGi, the > Configuration Admin service. So, we can't (re)configure the registered > services at runtime using simple service properties... > > Fifth, those activators don't scale ! if I have an environment > (multi-tenant) where I need to have more than one version running same time. > > So, would help much more if those activators were removed, and improve the > blueprint project to register all that is needed for it. after that we > could create other projects for people wanting to use OSGi Declarative > Services and maybe a OSGi CDI just like the Blueprint one.... > > And I bet we could figure out a much more clever way to synchronize the > "internal registry" with the OSGi service registry instead have to call > ServiceRegistryImpl.getInstance().registerLocator inside the activator > (Drools-Compiler). One possibility is to create an OSGi implementation for > ServiceRegistry interface instead use ServiceRegistryImpl in all places. > > > > > On top of this, some additional "sugar" was created that allows you to > more easily define various elements (kbase, env, etc.) so they can be > injected more easily. You are free to use these, but this is not required, > you could initialize these elements yourself using pure Java as well for > example. Afaik, kie-aries-blueprint.xsd should be up-to-date. > > There are some osgi examples available here: > > https://github.com/droolsjbpm/droolsjbpm-integration/blob/master/drools-o... > > > Kris > > > On 18-08-2014 07:28, Kris Verlaenen wrote: > > Cristiano, > > Cristiano Gavião schreef op 15/08/2014 17:02: > > Hi, > > has a long time that I don't play with Drools and JBPM source code. This > week I was walking through them again and saw a lot of new elements, > interfaces and new ways to setup things. > > I saw that some Blueprint specific annotations and classes were created > (kie-aries-blueprint). > But the existent osgi activators are still registering some services > that seems not be appropriated anymore. at least they are different from > the set of elements in blueprint namespace (environment, kmodule, kbase > and others ) that I saw. > > For example, in activator of drools-core we have a > KnowledgeBaseFactoryServiceImpl being registered. in drools-compiler we > have KnowledgeBuilderFactoryServiceImpl being registered. > > I can't use blueprint, so I need to figure out what is the best setup > workflow for OSGi and get the proper services registered. > > Question, is the kie-aries-blueprint.xsd reflecting the actual state of > kie, drools and jbpm core setup workflow, so I can use it as start point? > > could someone check that and give me a feedback ? > > It is true that using factories isn't always trivial in OSGi, so the > activators you are referring to are used (internally) to do additional > registration for OSGi. They should be working and are required when using > OSGi. > > On top of this, some additional "sugar" was created that allows you to > more easily define various elements (kbase, env, etc.) so they can be > injected more easily. You are free to use these, but this is not required, > you could initialize these elements yourself using pure Java as well for > example. Afaik, kie-aries-blueprint.xsd should be up-to-date. > > There are some osgi examples available here: > > https://github.com/droolsjbpm/droolsjbpm-integration/blob/master/drools-o... > > > Kris > > > <KieDroolsJbpmActivators.ods> > _______________________________________________ > > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > > > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev > -- Charles Moulliard Apache Committer / Architect @RedHat Twitter : @cmoulliard | Blog : http://cmoulliard.github.io

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AUTO: Paul CHAU N'GUYEN est absent(e). (returning 01/09/2014)

by paul.chaunguyen＠externe.bnpparibas.com

I am out of the office until 01/09/2014. Je suis absent, Je répondrai à votre message dès mon retour. I am out of the office, I will reply when I come back. Regards, Paul Note: This is an automated response to your message "jbpm-dev Digest, Vol 67, Issue 3" sent on 18/08/2014 18:44:25. This is the only notification you will receive while this person is away. This message and any attachments (the "message") is intended solely for the intended addressees and is confidential. If you receive this message in error,or are not the intended recipient(s), please delete it and any copies from your systems and immediately notify the sender. Any unauthorized view, use that does not comply with its purpose, dissemination or disclosure, either whole or partial, is prohibited. Since the internet cannot guarantee the integrity of this message which may not be reliable, BNP PARIBAS (and its subsidiaries) shall not be liable for the message if modified, changed or falsified. Do not print this message unless it is necessary,consider the environment. ---------------------------------------------------------------------------------------------------------------------------------- Ce message et toutes les pieces jointes (ci-apres le "message") sont etablis a l'intention exclusive de ses destinataires et sont confidentiels. Si vous recevez ce message par erreur ou s'il ne vous est pas destine, merci de le detruire ainsi que toute copie de votre systeme et d'en avertir immediatement l'expediteur. Toute lecture non autorisee, toute utilisation de ce message qui n'est pas conforme a sa destination, toute diffusion ou toute publication, totale ou partielle, est interdite. L'Internet ne permettant pas d'assurer l'integrite de ce message electronique susceptible d'alteration, BNP Paribas (et ses filiales) decline(nt) toute responsabilite au titre de ce message dans l'hypothese ou il aurait ete modifie, deforme ou falsifie. N'imprimez ce message que si necessaire, pensez a l'environnement.

10 years, 4 months

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services registered by OSGi bundle activators of Kie, Drools and Jbpm are still needed ?

by Cristiano Gavião

Hi, has a long time that I don't play with Drools and JBPM source code. This week I was walking through them again and saw a lot of new elements, interfaces and new ways to setup things. I saw that some Blueprint specific annotations and classes were created (kie-aries-blueprint). But the existent osgi activators are still registering some services that seems not be appropriated anymore. at least they are different from the set of elements in blueprint namespace (environment, kmodule, kbase and others ) that I saw. For example, in activator of drools-core we have a KnowledgeBaseFactoryServiceImpl being registered. in drools-compiler we have KnowledgeBuilderFactoryServiceImpl being registered. I can't use blueprint, so I need to figure out what is the best setup workflow for OSGi and get the proper services registered. Question, is the kie-aries-blueprint.xsd reflecting the actual state of kie, drools and jbpm core setup workflow, so I can use it as start point? could someone check that and give me a feedback ? many thanks, Cristiano

10 years, 4 months

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Re: [jbpm-dev] [rules-dev] services registered by OSGi bundle activators of Kie, Drools and Jbpm are still needed ?

by Cristiano Gavião

I agree that should have a consistency. but where should we start from ? are you able to point me to any resource describing a good setup workflow using that new stuffs that I can use as base for my own investigation? The examples that I saw until now are using factories. what I can remember last time I tried 6.x, that factories won't work in osgi, so they are good candidates to be registered by those activators. Cristiano On 15-08-2014 13:22, Mark Proctor wrote: > I think things have evolved organically here. We probably need to do a full review, to ensure consistency. > > I suspect know one would know the answers, without having to dig in the code first. > > Mark > > On 15 Aug 2014, at 16:02, Cristiano Gavião <cvgaviao(a)gmail.com> wrote: > >> Hi, >> >> has a long time that I don't play with Drools and JBPM source code. This >> week I was walking through them again and saw a lot of new elements, >> interfaces and new ways to setup things. >> >> I saw that some Blueprint specific annotations and classes were created >> (kie-aries-blueprint). >> But the existent osgi activators are still registering some services >> that seems not be appropriated anymore. at least they are different from >> the set of elements in blueprint namespace (environment, kmodule, kbase >> and others ) that I saw. >> >> For example, in activator of drools-core we have a >> KnowledgeBaseFactoryServiceImpl being registered. in drools-compiler we >> have KnowledgeBuilderFactoryServiceImpl being registered. >> >> I can't use blueprint, so I need to figure out what is the best setup >> workflow for OSGi and get the proper services registered. >> >> Question, is the kie-aries-blueprint.xsd reflecting the actual state of >> kie, drools and jbpm core setup workflow, so I can use it as start point? >> >> could someone check that and give me a feedback ? >> >> many thanks, >> >> Cristiano >> _______________________________________________ >> rules-dev mailing list >> rules-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-dev > > _______________________________________________ > rules-dev mailing list > rules-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-dev

10 years, 4 months

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Ask for Help

by Liliya ardogan

Hi Experts, I'm a student, and I'm currently preparing for my end of study project. My project is to propose a new conception by modifying the code source of jBPM. I'm feeling losed because I couldn't find an idee . But, before desperation, I'm asking for your help while you present the leader of jBPM on the world !!!. I have a knowledge about jBPM-6.0.1 . Could you please help me by giving me a proposition or a small idea ?!!. Thank you for any solution.

10 years, 4 months

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Business rules and decisions

by Shiwani Agrawal

I want to define some business rules for my process and want to take some decisions to go on certain path . Please help to get through this problem ?

10 years, 4 months

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Tutorial on Kie Workbench

by Shiwani Agrawal

Hello , i want to develop my business model on the kie workbench . I read JBPM developers guide but i didnt get it . Can you provide me link of tutorials for beginners ?

10 years, 4 months

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Interested in Contribution

by Parag Goyal

Hello , i wanted to contribute in JBPM , so can any one help me in getting started . I have two years of experience in development in java . Thank You

10 years, 4 months

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jbpm-dev August 2014