JJ AppLink Express Hello

Plain Express app to respond to simple POST from AppLink

Assumes you have a Salesforce org that is enabled for Heroku Applink that you can try sample code in.

The key features to make this work with AppLink Service Mesh are:

• add the service mesh buildpack
• add Heroku config var APP_PORT
• adjust the Procfile to launch service mesh
• in code, bind Express to $APP_PORT

Read First

DISCLAIMER -- This is a demo, not production code. Feel free to consult the code and use it to fuel your own ideas, but please do not assume it's ready to plug into a production environment as-is.

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Setup

heroku create

heroku buildpacks:add heroku/heroku-applink-service-mesh

heroku buildpacks:add heroku/nodejs

heroku addons:create heroku-applink

heroku config:set APP_PORT=3000

git push heroku main

(Set permset for Manage Applink)

heroku salesforce:connect MyOrg

heroku salesforce:publish api-spec.yaml --client-name=HelloAPI --connection-name=MyOrg

(Set HelloAPI permset)

Testing

Run this anonymous Apex:

herokuapplink.HelloAPI api = new herokuapplink.HelloAPI();
herokuapplink.HelloAPI_hellorequestbody aBody = new herokuapplink.HelloAPI_hellorequestbody();
herokuapplink.HelloAPI.postHello_Request postRequest = new herokuapplink.HelloAPI.postHello_Request();
herokuapplink.HelloAPI.postHello_Response postResponse;
herokuapplink.HelloAPI_hellosuccessresponse successResp;

aBody.name = 'Salesforce';
postRequest.body = aBody;
postResponse = api.postHello(postRequest);
successResp = postResponse.Code200;
System.debug('greeting: ' + successResp.greeting);

Cleanup

Delete the Heroku app in the web dashboard or use this command:

heroku destroy

Delete the External Service "HelloAPI" from your Salesforce Org as explained in these instructions.