ARM Template concat resources - azure

Question

I have in ARM template:
"parameters": {
"applications": {
"value": "app1|app2|...|app(n)"
}
},
"variables": {
"applications": "[split(parameters('applications'), '|')]"
},
{
"name": "[concat('notificationhub', copyIndex())]",
"type": "Microsoft.Resources/deployments",
"apiVersion": "2016-09-01",
"dependsOn": [
"[concat('Microsoft.NotificationHubs/namespaces/',variables('notificationHubNamespace'))]"
],
"copy": {
"name": "notificationhubCopy",
"count": "[length(variables('applications'))]"
},
"parameters": {
"notificationHubNamespace": { "value" : "variables('notificationHubNamespace')]" },
"notificationHubName": { "value": "[concat('notificationhub-', variables('applications')[copyIndex()])]" },
...
}
}
},
How to concat created notificationhub1 and notificationhub2 into one value in app settings like
"notificationhub1.connection|notificationhub2.connection|...|notificationhub(n).connection"
or is there an option to dynamically create in app settings based on count properties with respective values?
{
"name": "[variables('webappName')]",
"type": "Microsoft.Web/sites",
"location": "[resourceGroup().location]",
"resources": [
{
"name": "appsettings",
"type": "config",
"properties": {
"MobileApps": "[parameters('applications')]",
"NotificationHubs": "???",
-- OR --
"App1NotificationHub": "notificationhub1.connection"
"App2NotificationHub": "notificationhub2.connection"
"App(n)NotificationHub": "notificationhubn(n).connection"
}
}
},

Answer 1

I can't be 100% sure on this, but looking at what you have here something like this should work:
[concat(listKeys(resourceId('Microsoft.EventHub/namespaces/authoriz‌​ationRules', 'eventHubNamespaceName', 'keyName'),'2015-08-01').primaryConnectionString, '|', listKeys(resourceId('Microsoft.EventHub/namespaces/authoriz‌​ationRules', 'eventHubNamespaceName', 'keyName'),'2015-08-01').primaryConnectionString)]
I can't verify if listkeys for eventhubs do work like this, but when you figure out how listkeys works, you should be able to paste that into the example above.
Also '|' might need escaping. I suppose escaping is done with \.
edit: Again, I'm not sure about this, I've never tried it, but you would want to use this link and try to reproduce it with notification hubs instead of storage accounts.