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Asynchronous communication in Microservices Interview Questions and Answers | Part -3 | Code Decode
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- Опубліковано 13 сер 2024
- Microservice asynchronous communication Interview questions and answers we have covered in this video of code decode
Udemy Course of Code Decode on Microservice k8s AWS CICD link:
openinapp.co/udemycourse
Course Description Video :
yt.openinapp.co/dmjvd
Ways to communicate between Microservices
We have seen Synchronous communications through -
Rest APIs
GraphQl
Feign using Eureka discoveries
GRPC ( 10 times faster than REST APIs ) - developed by Google as substitute of REST with many more features.
A synchronous call means that a service waits for the response after performing a request.
Today we will look at ways to do asynchronous communication in java. This communication usually involves some kind of messaging system like
Active Mqs
Rabbit MQs
Kafka
What is Async communication
In Async communication , To initiate such type of communication, a Microservice who wants to send some data to another Microservice publishes a message to a separate component known as a message broker. It is responsible for handling the message sent by the producer service and it will guarantee message delivery.
After the message is received by the broker, it’s now its job to pass the message to the target service. If the recipient is down at the moment, the broker might be configured to retry as long as necessary for successful delivery.
These messages can be persisted if required or stored only in memory. In the latter case, they will be lost when the broker is restarted and they are not yet sent to the consumer.
Since the broker is responsible for delivering the message, it’s no longer necessary for both services to be up for successful communication. Thus async messaging mitigates the biggest problem of synchronous communication - coupling.
What is Async communication
In Async communication , To initiate such type of communication, a Microservice who wants to send some data to another Microservice publishes a message to a separate component known as a message broker. It is responsible for handling the message sent by the producer service and it will guarantee message delivery.
After the message is received by the broker, it’s now its job to pass the message to the target service. If the recipient is down at the moment, the broker might be configured to retry as long as necessary for successful delivery.
These messages can be persisted if required or stored only in memory. In the latter case, they will be lost when the broker is restarted and they are not yet sent to the consumer.
Since the broker is responsible for delivering the message, it’s no longer necessary for both services to be up for successful communication. Thus async messaging mitigates the biggest problem of synchronous communication - coupling.
What is Async communication
A relevant point here is that there, the sender doesn't need to wait for the response. It might be sent back from the receiver later as another asynchronous message.
The intended service receives the message in its own time. The sending service is not locked to the broker. It simply fires and forgets.
What if the message broker is down?
A message broker is a vital part of the asynchronous architecture and hence must be fault tolerant
This can be achieved by setting up additional standby replicas that can do failover. Still, even with auxiliary replicas, failures of the messaging system might happen from time to time.
If it’s essential to ensure the message arrives at its destination, a broker might be configured to work in at-least-once mode. After the message reaches the consumer, it needs to send back ACK to the broker. If no acknowledgement gets to the broker, it will retry the delivery after some time.
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Thanks for uploading this is very frequently ask interview question
Thanks Tanveer🙂🙂👍👍
@@CodeDecode Hello @CodeDecode I am looking personal Java mentor for upskilling who has industry exp of 4+ years.
Can you provide tutorship where I can pay as wel
super explanation. This is the first time I am messaging in comments section.
Thanks 🙂
Hats Up. Really ur teaching way is very clear and accurate with the explanations. Great Job . Please post new things in Microservices and Kubernetes. Appreciate u
Thanks A lot Dhananjay 🙂👍
I have watched all 3 parts which are very usefull. This are best content vedios for an interview. Really helpful thnks a tonn
Thanks Madhumitha for the nice words
it's amazing content that i found on internet please upload grpc video as well. Thanks for guiding us.
Thanks Kanika ☺️👍
Yes please make videos on Kafka I heard this in every interview i had and grpc also 10 times faster 🧑💻 wanna learn more. Thanks for the video 🧑💻
Sure we will put video on that soon🙂👍
Undoubtedly this is the best explanation for the Async communication between the microservices. Thankyou very much Code Decode team :)
Thanks 😊😊👍
Thank you so much for your valuable time for making such good vedios , tutorials are very nice and to the point . I have watched your complete series and able to understand microservices very easily.
Thanks a lot Mayuri🙏🙂
I would like to take this opportunity to thank you very much as your content has helped me a lot in getting job in one my dream company. You have explained the concepts in an excellent way. Keep up the good work all the best!!
Many many congratulations Swaruppal . So glad that you were able to land at your dream job Man. Keep learning keep shining Man 🌟🌟🌟🌟
awesome tutorial. Thanks for coming up with such a nice explanations.
Thanks dilip
Thank you for the effort you put in uploading these videos, Mam. It was a great help during the interview process.
Thanks Shyamala🙂👍
Hello, great explanation about each and everything in deep. Thank you.
Thanks for the nice words
I have just watched the second episode of this series and was searching for the other questions you mentioned in the slides but couldn't found since the video never uploaded for them , and BOOM its here .. Thanks for the upload 🎉
🙂🙂sorry for the delay. We will upload more soon 👍🙂
Thank you Dear for your simplistic explanation.
😊😊👍👍
Your content is beyond awesome. 👌 You are so accurate with the explanations. Hats off.. can you pls also cover AWS , cloud concepts, DevOps, Kubernetes, system design, microservices design patterns , entitygraph from hibernate ,etc. Will be helpful and grateful to you 🙏
very crisp and clear information . By heart i m giving this message . No one explains me this well :)
Thanks for sharing knowledge on this .Please create in detail with example for grpc and kafka that is most commonly used .Now a days company preferring grpc and kafka and also most used .
True Pranjal. Now a days most companies are moving from rest to grpc. We will put video on grpc soon 🙂👍
Your video content is very informative and very nicely explained. Specially, with code implementation in parallel with theory, it clears all our doubts. Hats off to the entire team of code decode for such wonderful videos! Please make videos on GraphQl and GRPC.
Thanks a lot🙂🙂
Very informative. Thank you for sharing… ❤️❤️❤️
Thanks Dipali❤
Well organised content. Expecting an implementation in vaccination center microservices project. Which makes it more complete.
Please make small POCs on all topics with same usecase.
It's really so helpful the way your explain so clear understanding even in short time, request you to do more videos and POC in this topic, many people will definitely get benefited out of it, much Appreciated for your sincere efforts for making these videos
Thanks a lot🙂
Thanks for the video. It will be very helpful if you provide a video on kafka and Grpc implementation along with the important concepts about those 2 topics.
sure sireesha we will cover them soon
Please prepare implement kafka video ..its really helpful videos which you come up with ..thanks for such knowledgable videos
Sure Vidya🙂👍
Your videos are best for theoretical interview questions. Please make videos on both Graph Ql and GRPC. Thanks in advance.
Thanks Seelam🙂👍
Love your videos and way of teaching....is it possible you can share this particular ppt??
Hello Mam, Loved Your Content, Easy Explanation, I am also from Nagarro.
Thanks🙂
Please complete all Microservices topics. Your videos Play a very big role for people getting very good offers. If possible do a full stack development tutorial - Java, Spring boot, Microservices, react, dockerize and use kubernetes command to deploy into a cloud provider. Humble request.
Good video. Please make video on GRPC and also kafka soon.
Sure Akash 🙂👍
All videos are very helpful Thank you very much please make video on GRPC
sure swapnil we will create it soon
Hello code decode..Your teachings are very helpful for cracking product based companies tough interviews.. Thanks for continuing this learning sessions. Can you please add grpc,graphql, and pros cons and whatever is pending pls.
Sure 👍👍Thanks a lot 🙂🙂
Thanks for uploading the videos.
You’re welcome
Please make a vedio on GRPC CONCEPT
Sure we will create video on grpc🙂👍
Yes. Please upload a vedio on
grpc
Sure🙂👍
Great lecture as always!!!... please make a video on Webclient and Reactive programming. Thank you.
Sure we will try to cover reactive programming soon
Amazing Videos! Clear cut information! Kudos to the Code Decode Team. I request you make detailed video on Spring Boot with gRPC.
Your videos are excellent, Please post the videos on GraphQL and GRPC..
One question in Asynchronous communication, What happens if Message Broker it self is down and then how the communication will happen and how to handle this with the Replica, as it is duplicated how to handle to communication between the message brokers?
Thank you for another informative session. Please upload implementations for kafka and grpc.
Sure Vanmathi🙂👍
Very much intrested in GrapthQL and GRPC videos
Sure Abhijit 🙂👍
Thanks for such amazing interviews series, your explanation way is too good and please make a implementation video of kafka
ua-cam.com/play/PLyHJZXNdCXset6tBB1aY5aEY77YhbxWLo.html
@@CodeDecode Thank you so much, I have seen this video lecture too. Thank u so much again for such a good content.
great video thanks code decode
I really learnt a lot from your videos Mam. Thanks for that. If possible, can you please make videos on GRPC and GraphQl.
Yes it's in pipeline. Thanks a lot for the reminder
Please upload GRPC and GraphQL related communication videos too. Thank you!
Sure Nidhi 🙂👍👍
More videos on Microservices and need more on fault tolarance and message broker.
Thank you mam amazing content
👍👍😊😊
Thanks for all the informative videos. Can u please create a video on GRPC implementation if possible? That would be much more helpful. Thanks
Sure Suraj 👍👍
Hey very detailed and easy explanation 👍 please create a video on Kafka and it's configurations. How we can use kubetnetes with Kafka.
Thanks Shiksha. 👍sure
Your video content are so helpful and eplanation is just awesome. Also, could you please upload the synchronous/asynchronous communication with some real time coding example. Thanks in advance.
We have them all on channel👍 kafka playlist for async and rest api playlist for sync communication
yes mam, can you pls make a video on graphql ?
Thank you for this MS series , Please cover Kubernetes , docker , swagger and soap UI as well
Pls create Kafka realtime usage. Thank you for your support
Sure Padma we will create it soon
Thanks for doing these interview questions. Could you also please do a implementation using GraphQL.
Thanks. Sure Sai 👍👍
Can you make videos on GRPC ?? and how multiple microservices communicate each other with real time project ..
Hi please implement kafka in realtime project for demo. It can be really helpful ! Thanks for the series.
sure we will upload it soon
It would be great if you would please create a video on gRPC in Java. Have seen gRPC been used quite frequently in Golang, though
.
Please also can you explain Kafka implementation and your explanation is awesome,those questions only asking in interview in my scenario
Thanks 🙂🙂sure will do that👍🙂
Very informative videos mam thanks for sharing such content, mam can you please create videos with real time projects on GRPC , Graph QL , Kafka and also with logger mam 🙏🏻🙏🏻
Sure Utkarsh 👍👍
Thanks for wonderful video, I would like to know GRPC and GraphQL more, can you make a video on the please?
Please make a video on asynchronous communication also
ua-cam.com/play/PLyHJZXNdCXsd2e3NMW9sZbto8RB5foBtp.html
Please make video on GRPC and GraphQL.
Sure we will create it soon
Plz create a video on GRPC and Graph QL...Thanks
Sure sure👍👍
@CodeDecode, I want to know more about GRPC communication.
Please share the video of all types of sync and async communication for microservice
Very nice explanation.. Can you please add videos for gprc and graphql as well.. Thanks!
Sure Janhavee🙂👍
Awesome explanation 👏
Can you cover all topics
Graphql, Grpc, real-time topics please
Thanks 🙂🙂 sure 👍👍
Please change the pointer, that red color insect like pointer deviating our focus, i was like sometimes going backward and listening again...... Please consider. and regarding content its awesome
Sure Divya. We will reduce pointer usage
feint client can also be used for async call
Yeah 👍
Your contact is awesome why can't you do spring boot and micro service projects
soon we will going to do a live session on the same
Please create video in detail for messaging service
Sure Abhishikta🙂👍
please make a video for GRPC project setup
sure we will create it soon
@codeDecode
please create video on GRPC
sure we will create it soon
One point to add, when message broker is restarted then data is only lost if exchanges and queues are not durable and persistent. If you cannot afford to lose any messages, make sure that your queue is declared as durable and your messages are sent with delivery mode "persistent". Correct me if this is wrong. Will it also work if broker is restarted ?
Beautifully said 👍👍precise and correct
In pub/sub model, there is no external delete from services, it will be deleted automatically, when all of current consumers have processed it successfully or time expired for the message itself.
All consumer services do is, notify message broker whether message processed successfully or not.
Please create videos about gRPC
sure we will create it soon
Please make a video in GRPC and GraphQl
Sure Shruti👍
I don't know,what to say, 🙏🙏🙏🙏 thank you ma'am
Thanks Rudresh 🙂👍
Please make a video on GRPC
sure we will upload it soon
Please do video on Kafka
sure we will create it kafka too
@@CodeDecode thanks for the response
Could you explain more about GRPC with examples plz
Sure 👍👍
Please create video on graphic ql and grpc
Sure we will create it soon
Please make a tutorial on GraphQL and GRPC.
sure we will create it soon
@Code Decode please create a seperate video for GRPC in detail
Sure Hitha🙂👍
please create vedios on GRPC
Sure Neelabh 👍👍
Please make video on kafka
Sure Neha👍🙂
Have yoy made any video on GRPC ? really need badly . Please upload
Sorry Man. Not yet. Will do it soon 👍
Please make videos on grpc and graphQL as well.
Also if possible java8 to java11 transition concepts. Now days interviews expect java 11 sometimes
Sure awesome topics Akshay 👍👍
Yes pls
Please make one video on commonly asked coding questions while interview.
ua-cam.com/play/PLyHJZXNdCXscLDTLDzgsesrcnL8vdTWSY.html
Could u please please create publisis sapient interview question??
Sure Subhra 👍
please make video on flat tolerance in Message Broker
Please make video for each Sync and Async communication way
sure neha we will create it soon
can u please show us some well explanotary tutorial for client side and server side load balancing, difference between them and the uses of each please.
Nice topic. Sure we will do that👍🙂
There can be mulitple producers and multiple consumers, however the messages published to queue processed only once.
The key part is order and processing of the message. If you can update the diagram to include mulitple prodcuers & consumers, that would be great.
feign and GRPC pe implementation btiye with code examples
Sure Priyanka 👍🙂
Hi. You are clear and crisp in explaining things. Thanks. However, I can not see the third part of this. You asked for 300+ likes whereas you have already received 600+ likes :)
ua-cam.com/play/PLyHJZXNdCXset6tBB1aY5aEY77YhbxWLo.html
Hey Anya hope this is the next communication video I promised. Any thing else you need? We will create video on that too. Let us know here❤
Looking forward to your upcoming interview video in microservice series. Also, expecting logging, exception handling other common services to implement in MS architecture
please implement grpc call😀
Sure 👍
So what about the response to the user ?
Please explain
So if I have to return something so that it'll be reflected in UI ?..
Please do demo of kafka
Sure
A real time project microservice with kafka
Please make videos on graphql and GRPC
sure satyanarayana we will create it soon
Hi, kindly create video on kafka and design patterns.
sure ankit we will create it soon
Need vide on GRPC and how to implement it in code