Відео

Thanks a lot for the feedback

Thanks for the feedback Ravi. That error looks like auth issue. May be first debug/log to see if the access key and secret key are getting set while initialising S3Client. Also you can test the credentials through AWS CLI. First install AWS CLI, then run `aws configure` and enter the credentials. Then run command `aws s3 ls` and see if bucket is getting listed.

Sure, will plan that. Thanks for the recommendation

Part2 is already there - ua-cam.com/video/63PrzfVqnmw/v-deo.html We are working on the last one (UI) 😀

Two more videos to go, one for user authentication and second one for UI. Both should be around 60-90 minutes. Planning to do that in next 2-3 weeks. Thanks for checking.

@@Code.Wizzard thanks 🙏🏼

For this video I had set it up as an environment variable in my OS I think. Since I am using mac I added something like `export places.api.key="testkey"` in .zshrc file. In windows this can be done in environment variables. Another way is to pass this as environment variable while starting the app. If you are doing it from intellij go to `Run->Edit Configuration` and then add `places.api.key=testkey` in Environment Variables section.

@@Code.Wizzard thank you

Since the second one uses STOMP protocol on top of Websocket, I think it might not work since there are no options in postman to enable that. Will try to explore more.

@@Code.Wizzard so it is a case to create simple html page to test your backend app, right? Or maybe is there an ability to write integration tests for this purpose?

@@OleksandrProkopenko_ua correct, either can test it from a UI or write integration test using WebSocketStompClient

Thanks for your kind feedback

Sure, thanks for the feedback. Will plan something

Sure, I'll plan a video for that. Thanks for the feedback! Meanwhile, if you want to try it out, it's really easy to swap OpenAI with Ollama. Simply change the dependency from spring-ai-openai-spring-boot-starter to spring-ai-ollama-spring-boot-starter. This video has instructions on how to set up Ollama locally: ua-cam.com/video/AnOh0C5SdFY/v-deo.html

@@Code.Wizzard i have tried it out but not rag feature, so thought of asking you

That's great! Just switching the dependency in codebase of this video should do the trick then. However, while running Ollama locally, keep in mind that we usually use 7B or 13B models. This might lead to some reduction in accuracy compared to OpenAI's paid models, which use a much larger model, around 1.7 trillion parameters or so.

​@@Code.Wizzard let me try this 👍,, and bro please explain some more use. Cases with. Ai

Can you please tell me on how to switch to wss from ws using SSL. (I am using spring websocket without stomp & sockjs)

Thanks for your kind comments. Switching to SSL is straight forward For dev environment you can first create a self signed certificate using the below command. For production, it's recommended to obtain a certificate from a trusted CA. keytool -genkeypair -alias websocket -keyalg RSA -keysize 2048 -storetype PKCS12 -keystore websocket.p12 -validity 3650 Add the below to application.properties server.ssl.key-store=file:<Path>/websocket.p12 server.ssl.key-store-password=<password> server.ssl.keyStoreType=PKCS12 server.ssl.keyAlias=websocket server.ssl.enabled=true After that you can access the websocket using url starting with wss://

That would be a nice feature to have. But it looks like this plugin doesn't support that. There are other tools like dbdiagram.io/d available, dbeaver.io/ which can be used for that. But I haven't used those.

Yes, prepare the .sql file Right click on the blank erd.json file & choose import If the erd.json has content, it will overwrite/replace with the imported .sql

Thanks, Vijayarajan

Usually, for real-time use cases, messages are pushed to your app via queue/topic or by calling your API by a client/external app. But if you want to push data from a DB over SSE, you can poll the DB at regular intervals for new data and push this data incrementally to the client using an SseEmitter. Hope that answers your question.

We have a video on Graph QL Subscriptions over Websockets - ua-cam.com/video/yRX7uTPOONE/v-deo.html Will definitely plan other topics in future. Thanks for the feedback.

Good point. List.of() is more optimised for this scenario since it provides an immutable list. Thanks for the feedback. Although Arrays.asList() provides a fixed size list, you can still replace an element in an existing index with another one using set operation

To make it generic, so you can use an type of list in future

Thanks Patrick for answering. Building Gatherers with generics will allow us to use the same gatherer for other types. For example we can use the same fixed window gatherer for list of Person objects instead of String.

Thanks for the comment. I would suggest to first get an in depth understanding of Spring Web before starting with web flux. We have one video on Spring Web which is a short one - ua-cam.com/video/iRiJqI3oAqA/v-deo.html. Planning to do a detailed crash course sometime soon. There are some nice courses in Spring Academy which are good for beginners like spring.academy/courses/building-a-rest-api-with-spring-boot. Also check some popular crash courses in UA-cam. Along with the courses start building some projects. That is the best way to learn.

Nice question @patilrohan. Haven't tried this in PWA. But I think you can get this working by bypassing the service worker for SSE requests and using EventSource API directly in the main thread. I think service worker is inherently designed to handle offline scenarios, so it won't support persistent connection. Also, you might need to handle offline scenarios in the onError handler of EventSource API depending on the use case and avoid too many retries. Also, you might need to persist the last received event ID and pass it in the header while reconnecting.

Thank you !