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when I add @postMapping here then it gives error

You can only add that annotation on REST server methods that handle incoming requests.

You are trying to make an outgoing HTTP call, then you need to use an HTTP Client of your choice, or a Spring RestTemplate

If you are trying to call any internal HTTP endpoint, then you should refactor your code to call methods of the same classes those HTTP resources interact with.

The Web API project should not have a receive endpoint – it has no consumers configured. So every message will be skipped by that receive endpoint. You only configure receive endpoints when you have consumers.

And you only need to call ConfigureEndpoints when you've added consumers.

To get the cross account data interaction we need to follow the below steps:

1. Create a role in the Account from/to where you want to push/pull data from ( in your example Account A i.e. with IOT Core)

2. Create a trust for that role

3. Using "sts:AssumeRole" within Account B ( you are using lambda) to get the access/privilege's assigned with role in account A.

In you code I do not see the "sts:AssumeRole" and probably that is what causing the issue. You can refer to How can I configure a Lambda function to assume a role from another AWS account?

Because you haven't declared your _id on your Mongoose Schema, Mongoose is defaulting to an ObjectId type for your documents' _id instead of a String one that leads to the error.

To solve this you can declare the _id in your schema like this:

I don't think you will be able to cast and unwrap in a case, but with this extension at least your Loop A would be less verbose:

I believe it's a bug. I opened an issue if you want to follow it:

https://github.com/spring-cloud/spring-cloud-stream/issues/2168

As a work around simply point it to the same destination

If you've written JSON data to the topic then you can read it with the kafka-console-consumer.

The error you're getting (Error deserializing Avro message for id -1…Unknown magic byte!) is because you're using the kafka-avro-console-consumer which attempts to deserialise the topic data as Avro - which it isn't, hence the error.

You can also use PRINT DXT; from within ksqlDB.

You've defined a network, but not attached your service to it

You need to add a networks block to the API service

Because you are using an anchor tag the page is being refreshed, that is why it toggles back to non-editing mode.

Since Angular v6, there is the new anchorScrolling option for the RouterModule. You can set it in the module's import: