IntelliJ 15, SuperDevMode, AppEngine, Gradle

[Evan Ruff]

Hey guys,

I'm starting a new GWT project and, seeing as how we're on the precipice of GWT 2.8 with JsInterop, I've decided to try to get myself together and upgrade my project and setup. It's a fresh project, but I had a working Eclipse version based on GWT-Views and some OAuth stuff. I've been holding off on doing any UI work to get to Elemental, but have some simple views to facilitate the easy stuff. I purchased Intelli-J 15, updated all my gradle dependencies and tried to import that project. To say that this has not gone smoothly would be an understatement.

I was hoping someone out there had some experience and could answer a couple of questions:

1. If I'm using AppEngine and SDM, do I need to have to separate debug configurations? One for SDM and one for AppEngine? Then start them one after the other?

2. At this point, I can get to /_ah/admin and I can get to the "Compiling..." screen of SDM. It looks like everything compiles correctly, but when it tries to actually load my entry point, nothing happens. There's no source map for my code in Chrome, only the standard library stuff. Also, when I look in the log I see:

Running Codeserver at ... /home/gte619n/.IntelliJIdea15/system/gwt/cms.75073451/cms.9605c5e5/run/www

But then working dir  /tmp/gwt-codeserver-2976851721674933708.tmp

But then I see that after compiling it says: Linking into /tmp/gwt-codeserver-2976851721674933708.tmp/com.hs.auto.app.Application/compile-2/war/app

These locations all seem different. is this why my entry point is not loaded?

How should I configure this correctly?

Thanks you for reading and I appreciate any help,

E

[Jens]

1. If I'm using AppEngine and SDM, do I need to have to separate debug configurations? One for SDM and one for AppEngine? Then start them one after the other?

Never used AppEngine but I would generally say yes since you most likely launch SDM with -noserver when using AppEngine server right?

 

2. At this point, I can get to /_ah/admin and I can get to the "Compiling..." screen of SDM. It looks like everything compiles correctly, but when it tries to actually load my entry point, nothing happens. There's no source map for my code in Chrome, only the standard library stuff. Also, when I look in the log I see:

Running Codeserver at ... /home/gte619n/.IntelliJIdea15/system/gwt/cms.75073451/cms.9605c5e5/run/www

Thats the default if you do not pass -war /path/to/exploded/war as dev mode parameter in your run configuration.

 

But then working dir  /tmp/gwt-codeserver-2976851721674933708.tmp

Thats the SDM CodeServer working directory. Not important for you.

 

But then I see that after compiling it says: Linking into /tmp/gwt-codeserver-2976851721674933708.tmp/com.hs.auto.app.Application/compile-2/war/app

Just a sub directory of your SDM work directory. Everytime your recompile your app in the browser a new compile-1, compile-2, ..., compile-n folder will be created. Thats normal and not really important for you.

How should I configure this correctly?

Probably depends if you want to run everything through Gradle or through your IDE. I usually launch things through my IDE so what I do is:

1.) Goto Project structure and create exploded war artifact (might already exist because of gradle) for all the server stuff

2.) update GWT run configuration and add -war /path/to/exploded_war_artifact/ 

3.) create a server (in my case jetty) in IntelliJ and tell it to deploy the artifact created in 1.)

Then I start SDM through the run config, then Jetty through its run config (which then deploys the artifact of 1.) which should contain GWT related stuff because of 2.)). 

-- J.

[Evan Ruff]

Hey Jens,

Thanks for all the advice. I think I'm getting close, but I'm still not quite there yet.

I added -noserver and -war path/to/my/exploded/war to my dev options for the SDM configuration.

Now, I start SDM, then I start AppEngine and I've got:

http://localhost:8080 (AppEngine server, looks good)

http://127.0.0.1:9876 (SDM Code Server)

http://localhost:9876 (recompile-requester?)

When I browse to my index page the "Compiling Application" thing comes up as expected so I think all of my files are making it into the war; however, I'm still not getting my entry point to come up. Further, when inspecting everything in Chrome Dev Tools, the only sourcemapped code I can find is com/google/gwt and gen/com/google/gwt, no notice of my code anywhere.

app.nocache.js seems to load as expected. I'm not getting any errors in the console. Everything in the the network frame seems to load and I even get one of the .cache.js files. Just not the entry point running!

Am I missing something in my artifact or related to get my GWT code in the build? When I look in the exploded war, my /app directory is in there with a bunch of 60kb *.cache.js files, which feels about right for the current functionality.

The entry point doesn't ever seem to run. I'm wondering what else could be going on in my config. Does anyone have any other ideas about what to check?

Thanks!

E

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[Evan Ruff]

Fellas,

After further research, I discovered a very tricky and hard to detect bug: I forgot the damn entry point in my .gwt.xml

Otherwise, everything is working really well. Thanks for all your help Jens!

As a related question, Is there any way to debug SDM and AppEngine server at the same time??

Thanks,

E

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[Jens]

After further research, I discovered a very tricky and hard to detect bug: I forgot the damn entry point in my .gwt.xml

ouch..glad you have found it :) I would have probably searched whole day long.

As a related question, Is there any way to debug SDM and AppEngine server at the same time??

Debugging client side code is generally done in the browser's dev tools through source maps. As you use IntelliJ 15 you could check the "with javascript debugger" checkbox in your GWT run configuration and then also install the Jetbrains Chrome plugin. When doing so IntelliJ creates an additional JavaScript debugger run configuration that will automatically launched when launching GWT run configuration (but you can also start it manually). IntelliJ is then connected to Chrome as remote debugger (your page in the browser should show a yellow notice at the top saying that Jetbrains is debugging that page). If everything works you should be able to set breakpoints in your Java files inside IntelliJ and debug your code in your IDE instead of the browser. But keep in mind that you are still debugging JavaScript though source maps, you only swapped Chrome Dev Tools with your IDE. 

Also you must close Chrome Dev Tools to make it work as only one debugger can be active. As soon as you open Chrome Dev Tools, debugging through IntelliJ  will stop until you close Chrome Dev Tools again and relaunch the JavaScript debugger run configuration.

You server side code on your AppEngine server can be debugged like any other Java process. If you launch the server through IntelliJ then you can just use the "debug" button to launch it. Otherwise you must use Java's remote debugging capabilities by creating a remote debugger run configuration in IntelliJ and launch AppEngine server with debugging enabled.

-- J.