How to run app locally with HANA Cloud?

[saphanaacademy]

How to run app locally with HANA Cloud?

[saphanaacademy]

G'day Jason,

Thanks for using the generator and asking the question.

Have you seen this tutorial which covers local development?

The recommended approach is to build and deploy the project to Cloud Foundry, then use DefaultEnv to create a local default-env.json file, set CAP to use the "production" profile with cmd export CDS_ENV=production then use cds watch or cds run or all-in-one CDS_ENV=production cds watch

Best way to access the UI is to use the auto-generated links in the "Web Applications" section of http://localhost:4004 and authenticate using one of the local test users eg: joe defined in package.json.

In most cases this should suffice.

Thanks.

[js1972]

Hi, I have watched those local development videos you linked but the app is structured differently. Apps generated by this yeoman generator have this XS-app.json:

{
    "welcomeFile": "index.html",
    "authenticationMethod": "route",
    "routes": [
        {
            "source": "^/catalog/(.*)$",
            "csrfProtection": false,
            "authenticationType": "xsuaa",
            "destination": "jasonhanaapp-srv"
        },
        {
            "source": "^/(.*)$",
            "authenticationType": "xsuaa",
            "service": "html5-apps-repo-rt"
        }
    ]
}

Note the destination mentioned above for the catalog service!

So in my app/default-env.json I add this to match:

"destinations": "[ {\n  \"forwardAuthToken\" : true,\n  \"name\" : \"jasonhanaapp-srv\",\n  \"url\" : \"http://localhost:5001\"\n} ]",

Now I start the local service with cds watch --production and this connects to the real hana db.
Then I start the approuter in /app with npm start.
When I goto the approuter I get the proper xsuaa redirect which is all good. Note that I need to adjust the path slightly and remove the "resources" part like so: http://localhost:5000/html5/index.html. If doing pure local development (sqlite) then the path from cds watch is: http://localhost:4004/resources/html5/index.html.

This shows the index page well. But when I click any links that call into the CAP SRV it fails with "not found" error.

So the difference in architecture here is that in the local development YouTube videos from Philip there is no destinations created and the MTA just refers to srv-api. Whereas with this generator there seems to be a bunch of destinations created and one of them: jasonhanaapp-srv is referenced in the XS-app.json as copied above.

The approuter when running locally issues this error when you hit a catalog url:

GET request to //html5/catalog/ completed with status 404 ENOENT: no such file or directory, stat '/Users/I540401/dev/jasonhanaapp/app/resources/html5/catalog/index.html'#

So I'm wondering - what is it about the structure of this app that means this won't work? I can see its something to do with th destinations...

[saphanaacademy]

Hi,
Are you using SAP Business Application Studio or pure local development such as with Visual Studio Code?
It looks like the project is using the HTML5 repository and its own project app router rather than the managed app router. Is that correct?
Would you be able to share the entire project or the answers to the prompts when using the generator - so we can try to reproduce the issue?
Thanks.

[js1972]

I have solved the issue and it was mainly just my lack of understanding. I was trying to run approuter locally which was causing the above issue.

By simply running cf de jasonhanaapp-srv to download the HANA Cloud credentials from cloud foundry into a default-env.json file it all worked using HANA Cloud as the DB instead of SQLite. I could run the app with CDS_ENV=production cds watch.

Thanks for your help.