Hi Jörg within...
On 16 October 2015 at 16:13, Rade, Joerg / Kuehne + Nagel / Ham GI-PS < [email protected]> wrote: > Hi Dan, > > changes to non-entity classes could be reloaded? > I assume I have to rebuild the war. Correct? > > When running from the IDE we tend to use the org.apache.isis.WebServer bootstrapper, which basically runs an embedded Jetty. This saves having to do any packaging or deployment, and works fine for both Eclipse and IntelliJ. See the user guide [1] for more on that. > >One reasonable workaround is to use contributed actions, and/or event bus, > >and have them in essence "decorate" the class. As your app gets larger > you'll > >probably want to be using these anyway. And the contributing services can > be > >reloaded by DCEVM without requiring any enhancing going on. > > Can you point me to an example? Or give more details? > > I haven't used DCEVM on Eclipse, but it seems that it's easy enough to get going, see eg [2]. As it looks like I mentioned before, the main thing that prevents hot reloading is the DataNucleus enhancer... any change to entities is going to require the entity to be re-enhanced, and the JDO metamodel recreated, which usually "stuffs things up". However, more often than not the structure doesn't change that often, however it's the behaviour that you're most likely wanting to change while the app is still running. If you move that behaviour out into contributed services, then these can be reloaded happily (when running in prototype mode). Isis will automatically recreate the portion of the metamodel for any domain object when it is rendered. There's a brief discussion of contributed services in the users' guide [3]; you'll find that the various isis addons all use the technique quite extensively (eg audit/command contribute to each other via the HasTransactionId interface; audit/security/sessionlogger/command contribute to each other via the HasUserName interface). In 1.10.0-SNAPSHOT I've been working on an improved programming model, called "mixins", that makes this more overt. The new incode modules [4], [5] use this throughout, see eg [6]. It's basically a simplified version of the DCI architecture, per Trygve Reenskaug and Jim Coplien. HTH Dan [1] http://localhost:4000/guides/ug.html#_ug_deployment_cmd-line [2] http://tirthalpatel.blogspot.co.uk/2014/06/steps-to-setup-hotswap-agent-in-eclipse.html [3] http://localhost:4000/guides/ug.html#_ug_how-tos_domain-services [4] https://github.com/incodehq/incode-module-note [5] https://github.com/incodehq/incode-module-commchannel [6] https://github.com/incodehq/incode-module-note/blob/master/dom/src/main/java/org/incode/module/note/dom/impl/note/Notable_notes.java#L35 [7] http://www.artima.com/articles/dci_vision.html > Thanks in advance > Jörg > -----Ursprüngliche Nachricht----- > Von: Dan Haywood [mailto:[email protected]] > Gesendet: Freitag, 31. Juli 2015 13:13 > An: users > Betreff: Re: faster development in eclipse > > I've been meaning to do add some docs and a quick screencast about DCEVM > for a while; maybe this weekend.. > > To answer Martin's question: in fact, if running in prototype mode, then > the Wicket viewer automatically invalidates the metamodel of the (class of > the) displayed object... this is why editing the .layout.json file and > reloading changes causes updates to be picked up automatically. > > What is more tricky is if the entity is changed itself, ie its > structure/method signatures. If the internals are changed then regular > Java Hotspot can mostly cope, and I suspect that DCEVM would make that more > reliable still. But if the entity has changed then the class needs > re-enhancing. Unfortunately DN doesn't provide any easy way to do that, so > there's little point in Isis providing an API to invalidate a class if the > underlying DN metamodel hasn't also been updated. > > One reasonable workaround is to use contributed actions, and/or event bus, > and have them in essence "decorate" the class. As your app gets larger > you'll probably want to be using these anyway. And the contributing > services can be reloaded by DCEVM without requiring any enhancing going on. > > ~~~ > Alternatively you could dust off the JRebel plugin that I worked on [1]. > I did get this working reasonably well for me, though I'm not sure if > anyone else did. (And, having said that I haven't found myself reaching > for it, but partly because I switch context between projects all the time). > Anyway, perhaps worth checking out. > > HTH > Dan > > > [1] https://github.com/isisaddons/isis-jrebel-plugin > > > > On 31 July 2015 at 09:03, Martin Grigorov <[email protected]> wrote: > > > Hi, > > > > I use DCEVM for code reloading. It is free and there is nothing to learn. > > But it doesn't help with updating Isis meta model. > > It would be nice if Isis exposes REST/JMX/... interface that triggers > > rebuild of the model. > > @Dan: is this possible with the code of isis-mavel-plugin? > > On Jul 31, 2015 7:45 AM, "Stephen Cameron" > > <[email protected]> > > wrote: > > > > > Hi again, > > > > > > After playing around with options I now think there isn't much > > opportunity > > > to speed things up, other than to use JRebel or change the way I > > > develop (not start the webapp so much). The webapp project looks for > > > jars in the maven repository not the war, so I only need to do maven > > > install on the > > dom > > > project when I change a dom class. That should have been apparent > > > sooner > > :( > > > > > > Bottomline: the webapp takes some time to start, but that is fine. > > > > > > > > > > > > On Fri, Jul 31, 2015 at 11:27 AM, Stephen Cameron < > > > [email protected]> wrote: > > > > > > > Hi, > > > > > > > > I would greatly appreciate some advice on speeding up development > > > > in Eclipse. Using the simpleapp project with separate dom, > > > > fixture, > > > integtest > > > > and webapp subprojects. > > > > > > > > I'd at least like the webserver (jetty,tomcat) to restart when I > > modify a > > > > dom class. This is what I am used to with Dynamic Web Projects, > > > > however after a bit of trying today I still cannot get that to > > > > work, using > > > Tomcat. > > > > > > > > It seems most are using JRebel with IntelliJ, but I am not so keen > > > > to > > go > > > > there yet as I am (re)learning on many fronts at present. > > > > > > > > The issue with Tomcat is a jetty dependancy, this was noted > > > > previously [1], but I could not get around it by removing > > > > jetty-all-9.2.11.v20150529.jar as suggested, I then got a > > > > null-pointer exception. > > > > > > > > At the moment I have to rebuild the whole project after a class > > > > change > > in > > > > the dom-project then restart the server to see the change. Is the > > because > > > > the .war has to be rebuilt for mvn jetty:run to use the new > > > > version of > > > the > > > > class file? > > > > > > > > I've just tried to use the eclipse jetty plugin but that is > > > > telling me that the dom classes have not been enhanced by > datanucleus. > > > > > > > > Hoping for some insights. > > > > > > > > Thanks > > > > Steve C > > > > > > > > > > > > [1] > > > http://permalink.gmane.org/gmane.comp.apache.incubator.isis.devel/99 > > > 31 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Kühne + Nagel (AG & Co.) KG > Rechtsform: Kommanditgesellschaft, Bremen HRA 21928, USt-IdNr.: DE > 812773878. > Geschäftsleitung Kühne + Nagel (AG & Co.) KG: Reiner Heiken (Vors.), Dirk > Blesius, Martin Brinkmann, Matthias Heimbach, Jan-Hendrik Köstergarten, > Nicholas Minde, Lars Wedel, Jens Wollesen. > Persönlich haftende Gesellschafterin: Kühne & Nagel A.G., Rechtsform: > Aktiengesellschaft nach luxemburgischem Recht, HR-Nr.: B 18745, > Geschäftsführendes Verwaltungsratsmitglied: Karl Gernandt. > Geschäftsleitung Region Westeuropa: Yngve Ruud (Vors.), Richard Huhn, > Björn Johansson, Jan Kunze, Bruno Mang, Stefan Paul, Holger Ketz, Dominic > Edmonds. > > Wir arbeiten ausschließlich auf Grundlage der Allgemeinen Deutschen > Spediteursbedingungen (ADSp), jeweils neuester Fassung. Wir verweisen > insbesondere auf die vom Gesetz abweichenden Haftungsbeschränkungen von > Ziffer 23 und 24 ADSp. Den vollständigen Text der ADSp übersenden wir Ihnen > gerne auf Anfrage und können Sie auch unter http://www.kuehne-nagel.com > einsehen. Ergänzend wird vereinbart, dass (1) Ziffer 27 ADSp im Rahmen > internationaler Übereinkommen weder unsere Haftung noch die Zurechnung des > Verschuldens von Leuten und sonstigen Dritten zu Gunsten des Auftraggebers > erweitert, und (2) wir in den im deutschen Seehandelsrecht aufgeführten > Fällen des nautischen Verschuldens oder Feuer an Bord nur für eigenes > Verschulden und (3) im Sinne der CMNI genannten Voraussetzungen nicht für > nautisches Verschulden, Feuer an Bord oder Mängel des Schiffes haften. >
