Including a submodule of a gwt project in maven

[Elhanan]

hi..

i have a submodule of a gwt project that it's artifact are meant to be included as part of the main artifact (which is a pom containing a debian installer) 

usually i would use copy-depdencies plugin to copy the jars into the main artifact, but in this case there's no jar, is there a way i can copy the output directory of that submodule into the main artifact? 

[lofid...@gmail.com]

Is it not possible to add those contents into an artifact with assembly for example? So that you can use it later for the dependency? I'm doing this in this example:

https://github.com/gwtboot/domino-rest-enum-date

Hope this helps.

[Elhanan Maayan]

i don't know, right now i'm having trouble to even compile everything, i mean, i can either compile all the static files  (html WEB-INF) into a war, OR i can compile the gwt sources, depending on what i place in pom.xml (gwt-app or war) i was trying to have it all in one module

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[lofid...@gmail.com]

Hmm it is not good to have "server" part and "client" part (web browser, GWT) in one Maven module... The best practice is always to separate them.

I wrote some simple explanation in this project: https://github.com/gwtboot/domino-rest-enum-date with 3 Maven modules, check the explanation over there...

[Elhanan Maayan]

yes, i understand that gwt-maven-plugin is "opinionated" (i.e forces me to do it) and i'm in the process of doing so, the thing is there's no "Server part" it's meant to operate as a page under cockpit ui 

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[lofid...@gmail.com]

In my example I only use the gwt-maven-plugin for the "client" part (GWT part). On the server part I use "pure" Spring Boot approach, therefore I copied all the JS stuffs from the "client" part with the help of maven-dependencies-plugin. I'm not using war deployment on Spring Boot...

For me the main concept: From GWT project you get just JS file(s) and you can copy it somewhere else where you have a web server. I also already use "only" the JS file(s) and copy the automatically to NGinX without server part.

[Elhanan Maayan]

i'm assuming those 2 need to be in there own aggregator pom (i.e my main parent pom will a web ui pom, which will have those submodules) , because i want to be able to build just that webproject alone without the need to build the whole project again (this is because that in order to develop for cockpit i can't use any of the rapid inplace server development, but compile the while thing and copy the distro to a linux server running the cockpit server)

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[lofid...@gmail.com]

I cannot follow you, maybe you could write something like:

cockpit

-- cockpit-client-ui

-- cockpit-server

...

I'm not sure how the structure of your projects looks like?

[Elhanan Maayan]

i did just that only it's more like 

main_pom

--mod1

--mod2

--webui

----webui-client

----webui-server 

--builder-mod that collects all jars from other modes into a directory for final deploy and installation 

what i wanna do is also be able to build only the webui project, and possibility to use the codeserver option which i don't think i can now because they are all split in 3 modules

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[lofid...@gmail.com]

--webui

----webui-client ---> this is the GWT code

----webui-server ---> this is server-side code like Servlet, Spring Boot, JavaEE servers

This is the standard layout for maven-gwt-plugin so would be no problem at all... and for the mod1 / mod2: as long as you do: install, the webui-client (gwt codeserver) will recognize the "source code" and could also transpile the code on the fly... (at least the last time I check it out)...

If you want to completely separate everything you could go for:

--modules

----mod1

----mod2

--webui

----webui-client

----webui-server 

--builder-modules

[Elhanan Maayan]

but the webui-server contains all the static resources like the html page 

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[lofid...@gmail.com]

Yes, but that's not a problem... in my example above I took out the html file (https://github.com/gwtboot/domino-rest-enum-date/blob/master/domino-rest-enum-date-client/src/assembly/distribution.xml) so that I only packaged the JS files... and at the end I use the HTML files from the server part.

IMHO it is always good to be able to implement the "client" without the server part. I always mock the whole "server part"...

[Elhanan Maayan]

i missing something basic here with all the code server/dev mode/super dev mode/launch dir/workdir/startup url/s 

at the end of the day you have to have an html file to use, when you launch for debug, but the gwt plugins are in the client module which doesn't have the html file on one hand, but they compile and write to the server module on other hand. 

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[lofid...@gmail.com]

Yes correct, HTML file is your host file.

I always put a simple HTML file to be able to launch / debug gwt webapp on the client... see: https://github.com/gwtboot/domino-rest-enum-date/blob/master/domino-rest-enum-date-client/src/main/java/com/example/public/index.html

But you don't have to use the same HTML file for client and server. On the server side I also have a HTML file: https://github.com/gwtboot/domino-rest-enum-date/blob/master/domino-rest-enum-date-server/src/main/resources/static/index.html which is a bit different.

The main artifact from "client" is the JS file which you can insert everywhere in a HTML file (server, etc.)

[lofid...@gmail.com]

additionally ... in the case using the structure of gwt-maven-plugin also correct.

There are two possibilities using gwt:codeserver (the case you said) or gwt:devmode (my example) see the difference: https://tbroyer.github.io/gwt-maven-plugin/codeserver.html

Both possible, I just prefer the second one ("standalone") because I try not to mix both world... Spring Boot stays like Spring Boot and the development of UI (client) should always be standalone and all the server parts should be mocked...

[Elhanan Maayan]

yes, but in addition to the html file your also have the css files as well.. 

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[lofid...@gmail.com]

Yes and you can control it using Maven assembly as I showed above

https://github.com/gwtboot/domino-rest-enum-date/blob/master/domino-rest-enum-date-client/src/assembly/distribution.xml

You can add the CSS files to be added to the server module on deployment...

But again, of course you can use gwt:codeserver instead of standalone gwt:devmode 

[Elhanan Maayan]

essentially i could use all the real static files in the client side 

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[lofid...@gmail.com]

Yes, the main thing you have a fast turn around time for compile - test cycle for UI development. Because if you are working on UI you don‘t care about the business logic on the server. You just need some data examples which you can mock easily with your DTO...

[Elhanan Maayan]

thanks, btw i don't understand why the maven plugin insists on compiling it for devmode

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[Dr. Lofi Dewanto]

Hmmm do you mean, maven-gwt-plugin compiles / transpiles everything first before it starts with gwt:devmode? ... Actually it doesn't need to, I agree... maybe @tbroyer could explain?

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[Elhanan Maayan]

no i meant, that when i do regular compile i still see *.devmode.* files on the target dir, and when i try to use just a normal server, it says it can't see the codeserver.

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[Dr. Lofi Dewanto]

Hmm ok... Never take a look at that...

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[Elhanan Maayan]

I also understand that tbroyer is against doing maven install in general, which is what i intend to do as it's part of the whole build process,  all i need is for the the entire output be recognized as an artifact to be carried to he main build , the solution your provider with the assembly seems to so if, so i won't even need the server side, and just have that pom copy instructions executed on the build module 

Although in the future i may have a server side just to be able to execute shell commands 

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[Thomas Broyer]

I haven't followed the whole discussion, but if you don't have a need for shared and server modules (what I call a "standalone" app), then you can put your HTML file (and associated resources) into your module's public path.

You'll then use gwt:devmode for debugging, to take advantage of the embedded web server to serve your static resources; see https://tbroyer.github.io/gwt-maven-plugin/codeserver.html#Standalone_applications

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[Elhanan Maayan]

hey thomas, the thing is, i wanna do it right without any hacks, but if i demine the pom as gwt-app, the output is just gwt compiled code  with no static html or css resources, if i use war in the pom type, the output is just the static resources. i want the entire artifact to be considered as both html and gwt javascript. 

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[Elhanan Maayan]

what's the difference between 

warDir, webappDirectory, workDir,workingDirectory, codeServerWorkDir , devModeWorkDir, tempDir? 

i mean it's hard to follow all those around.

[lofid...@gmail.com]

😀Therefore I'm using the simplest gwt:devmode... Standalone is the best... only <startupUrls>

But I think you could just use the default dirs...

[Thomas Broyer]

If you put your static resources in the public path of your module (by default a "public" subpackage next to your *.gwt.xml file), they'll be copied (by GWT itself, not the gwt-maven-plugin) to the output next to the *.nocache.js and *.cache.* files, so they'll end up in your WAR.

The only difference with using a "more standard" src/main/webapp is that if your GWT module has rename-to="myapp", then everything will be in the "myapp/" folder.

E.g. you create a src/main/resources/com/example/myapp/public/index.html with a <script src="myapp.nocache.js"></script> (notice: myapp.nocache.js, not myapp/myapp.nocache.js), then you have a myapp/index.html and myapp/myapp.nocache.js in your WAR.

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