Thank you so much for your efforts. After finishing this tutorial i have now got enough knowledge around Kafka and associated tools. I am very eager in a tutorial on Ktable and Kstreams of Kafka. Kudos.
Another worthy tutorial, thanks for your effort as always. Actually there is lot to learn in this video such as Docker, types of kafka etc. Thank You for your effort Basant.
At highlevel its very good to understand flow, but it would be great if you can add a note of API's usage and its importance. Ex: Why we are using consumerFactroy? why we have to use KafkaTemplate? and what all the other relevant API's can be considered?
Thanks Basant😊.. Appreciate your efforts, these are all our previous videos.. will go through one more time.. waiting for new topics 😊.. God bless You!!!!
@JavaTechie great one. can you please add the timer ? It would be really useful - for example we can straight away go to the consumer implementation for example.
Hello @JavaTechie thank you very very much for this course.Please add angular and react course as well if possible.We are waiting so long. Thank you very much.
@javaTechie.- I am someone who has hugely benefitted from your videos where you explained everything in detail. I am also a fan member of your channel. One small humble request if it is possible, please if you could kindly show us how to make the configurations of kafka in a windows machine. I have seen a lot of videos but most of them are misleading.
Hello subhra . Thanks for following Javatechie and I am so happy to see you as a member of Javatechie. Could you please tell me what configuration you are expecting is it offset explorer or Kafka yaml configuration.
@@Javatechie if you could show how the kafka, the zookeeper configuration setting is done in windows command prompt, because the settings would be very different from MAC right?
Hello buddy. No I don't have any plans at this moment because I Don't have windows OS with me now but i can suggest you to check out my old video which I did using windows .
Very Informative Tutorial but I have a question, In the Avro Lecture It is demonstrated that producer and consumer is in same project and whenever we make a change in employee.avsc file It changes the employee class in the defined package and now since both producer and consumer are in same project and are using employee class from same package that will not an issue, But If producer and Consumer are in different projects , then how do the changes we make in the employee.avsc file will be in sync with the Employee class in consumer. Asuming that I am using Avro and producer in a single project and Consumer in another project @Java Techie
Yes if it's in different project then nothing to worry we are not generating Employee class manually right, consumer needs to just run mvn build it will create payload for you by reading the latest schema
Hi Basant, while creating topic via binary download you have used bootstrap-server localhost:9092 but with docker you have used zookeeper:2181. Can you pls tell reason for difference
#JavaTechie , I noticed producer config values being printed in my IDE logs every time we threw exception for invalid IP address from the consumer . I guess that is because we are actually 'producing' to the DLT topic from the consumer? Please advise
partitions in a topic will not have depluicate data, meaning - if a topic has 3 partitions then a data will be present in all 3 partitions but ony 1...
@Java Techie, can you please help me with the issue in starting kafka server. I am getting no response when i start kafka server. C:\KAFKA\kafka_2.12-3.7.1>.\bin\windows\kafka-server-start.bat .\config\server.properties C:\KAFKA\kafka_2.12-3.7.1>
Hey Hi @Javatechie... I was following along and faced an issue while doing serialize and deserialize i was getting serialization exception... Then after checking whole lot of things i found out package name fro Customer class has to be same as one defined in consumer even if contents of class are same it wasn't working fine... So couldn't understand why this was happenning. Can you help me with this?
when deserialization in consumer side consumer, it uses the metadata about object which include while serialization. use these in consumer properties spring.kafka.consumer.properties.spring.json.use.type_info_headers=false spring.kafka.consumer.properties.spring.json.value.default.type=yourEntitynamewithpackage spring.kafka.consumer.properties.spring.json.use.type.headers=false
No it's not because of the serialization issue please check at topic level you have to choose string as data format by default it will set byte array for you.
If you know python also that's enough but you need to find out integration steps brother. This course for java integration I don't think it helps you . But check first 4 videos it will give you complete picture of Kafka internal
Hello @javaTechie : around 1h:43m , while using the template to send the message to topic. getting the below error Cannot invoke "org.springframework.kafka.core.KafkaTemplate.send(String, Object)" because "this.template" is null
@javatechie, I get the error in kafkaconsumer at 02:45:05 Caused by: org.springframework.messaging.converter.MessageConversionException: failed to resolve class name. Class not found [com.example.kafka_youtube_javatechie.model.User] at org.springframework.kafka.support.mapping.DefaultJackson2JavaTypeMapper.getClassIdType(DefaultJackson2JavaTypeMapper.java:137) ~[spring-kafka-3.1.4.jar:3.1.4] in your case, the Customer class is in the same package in both producer and consumer projects. But in my case, the equivalent (User.java) is in different packages in both producer & consumer. Can you please help?
turns out I had to use the following consumer configuration: Map map = Map.of(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092", ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class, ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class, JsonDeserializer.TRUSTED_PACKAGES, "com.example.kafka_consumer_javatechie.model,com.example.kafka_youtube_javatechie.model", JsonDeserializer.USE_TYPE_INFO_HEADERS, false, JsonDeserializer.VALUE_DEFAULT_TYPE, "com.example.kafka_consumer_javatechie.model.User");
![เกิดใหม่ทั้งทีก็เป็นสไลม์ไปซะแล้ว ซีซั่น 3 - ตอนที่ 66 [ซับไทย]](http://i.ytimg.com/vi/qcaUguFlwdM/mqdefault.jpg)
00:00:00 course outline
00:00:58 kafka for beginners
00:14:45 components and architecture
00:29:54 kafka installation
00:41:27 kafka CLI and workflows
01:22:09 installing kafka using docker-compose
01:37:43 kafka producer example using springboot
02:02:46 kafka consumer example using springboot
02:29:48 kafka serialize & deserialize
02:54:19 kafka partition
03:10:33 kafka e2e testing in spring boot with test containers
03:33:15 kafka error handling
04:01:12 kafka schema registry
Thank you so much buddy ☺️
thanks!
Oh now I know what I'm gonna do this weekend. Thank you
The sign of a good teacher is to make things simple. Very good.
Thank you so much for your efforts.
After finishing this tutorial i have now got enough knowledge around Kafka and associated tools. I am very eager in a tutorial on Ktable and Kstreams of Kafka.
Kudos.
Million thanks to Basant Sir.Always check Java techie if anything i wants to study.God bless
@JavaTechie, as long as you are there, no issues for us to learn Java Ecosystem tools and software, many thanks.
Another worthy tutorial, thanks for your effort as always. Actually there is lot to learn in this video such as Docker, types of kafka etc. Thank You for your effort Basant.
Good Job Basant, thank you so much! All your videos are just amazing. Keep providing us with such amazing tutorials
Hi i am very happy to getting such a wonderful teacher to making understand easily thanks a lot
At highlevel its very good to understand flow, but it would be great if you can add a note of API's usage and its importance. Ex: Why we are using consumerFactroy? why we have to use KafkaTemplate? and what all the other relevant API's can be considered?
Gold Stuff, what a clear concise explanation, Thanks for your effort towards the community Basant.
Thanks Basant😊.. Appreciate your efforts, these are all our previous videos.. will go through one more time.. waiting for new topics 😊.. God bless You!!!!
Please try to post about performance tuning in Java and SQL side
Much needed! Thanks for posting 👏
Thank you so much for your efforts.
Thank you Basant sir, Love and great regards from Mumbai
Great Share, Hoping for more like this.
Great video! Keep up the fantastic work. By the way, every time you say "why is it crying," it cracks me up! Keep those hilarious moments coming!
Thank you for your word . Keep learning 🤓
Thank you for this fantastic tutorial @javatechie. Please can you do a video on Debezium CDC with kinesis data streams, thank you.
@JavaTechie great one.
can you please add the timer ? It would be really useful - for example we can straight away go to the consumer implementation for example.
Yes i will add
Everything all and good, I noticed that in error handling part you are using some annotations for listner consumeEven which you never discussed about
Hello @JavaTechie thank you very very much for this course.Please add angular and react course as well if possible.We are waiting so long.
Thank you very much.
thank you for uploading such grate content - can you please make video for redis with real time example
HI Thank you for this tutorial..
When will you release the part 2 of this series
Very good Video. Need video on Kafka Connect and Connectors.
Great video ! Please add chapters/timeline in case someone wants to back and take a quick look at particular section
Noted will update that
1:10:10 Offer letter :)
Nice video sir pls make a video on real time use cases of Kafka ...
@javaTechie.- I am someone who has hugely benefitted from your videos where you explained everything in detail. I am also a fan member of your channel. One small humble request if it is possible, please if you could kindly show us how to make the configurations of kafka in a windows machine. I have seen a lot of videos but most of them are misleading.
Hello subhra . Thanks for following Javatechie and I am so happy to see you as a member of Javatechie. Could you please tell me what configuration you are expecting is it offset explorer or Kafka yaml configuration.
@@Javatechie if you could show how the kafka, the zookeeper configuration setting is done in windows command prompt, because the settings would be very different from MAC right?
Hi @Javatechie. Any plan on making the video of the topic I mentioned please.😔
Hello buddy. No I don't have any plans at this moment because I Don't have windows OS with me now but i can suggest you to check out my old video which I did using windows .
@@Javatechie Thank you man! Sorry for bothering you too much could you please provide me with the link?
Wow thanks for this JavaTechie.
Thanks a ton Buddy
You are really great bro. Thanks for the wonderful content.
💓 great course
Thanks for making this course
What is the work of replication factors?
Hey @JavaTechie I really liked your video and it was awesome. It will be very good if you share the link of the pdf. Thanks
good
Very Informative Tutorial but I have a question, In the Avro Lecture It is demonstrated that producer and consumer is in same project and whenever we make a change in employee.avsc file It changes the employee class in the defined package and now since both producer and consumer are in same project and are using employee class from same package that will not an issue, But If producer and Consumer are in different projects , then how do the changes we make in the employee.avsc file will be in sync with the Employee class in consumer. Asuming that I am using Avro and producer in a single project and Consumer in another project @Java Techie
Yes if it's in different project then nothing to worry we are not generating Employee class manually right, consumer needs to just run mvn build it will create payload for you by reading the latest schema
Hi Basant, I want to understand difference between client id and group id. Can you please explain with an example of usage
Dhanywad Basant sir
Absolutely fantastic
Hi Basant, while creating topic via binary download you have used bootstrap-server localhost:9092 but with docker you have used zookeeper:2181. Can you pls tell reason for difference
In windows zookeper running cmnd not working
I will setup in my windows and update you 👍
Very good ! Excellent !
Thanks for uploading this video 😊
i have never seen a crash course being 4hrs
Did you enjoyed it or feel bored 😴?
It's been great but do some real World project based Kafka well this is one example,
Thanks !!! More JT gold
#JavaTechie , I noticed producer config values being printed in my IDE logs every time we threw exception for invalid IP address from the consumer .
I guess that is because we are actually 'producing' to the DLT topic from the consumer?
Please advise
Thank you so much. Please will you be updating the Java AWS course any time soon?
Java AWS already available please checkout AWS playlist buddy 🙂
thanks for everything.
Thank you
great Java Techie
very good
partitions in a topic will not have depluicate data, meaning - if a topic has 3 partitions then a data will be present in all 3 partitions but ony 1...
Yes only 1 partition will have that info it won't be spam in other
@Java Techie, can you please help me with the issue in starting kafka server. I am getting no response when i start kafka server.
C:\KAFKA\kafka_2.12-3.7.1>.\bin\windows\kafka-server-start.bat .\config\server.properties
C:\KAFKA\kafka_2.12-3.7.1>
Don't worry, I'll write a blog about it and post it on my Medium. I'll also announce it in a youtube community post this weekend
Just awesome 😎 thanks
Much needed if possible then mysql or postgresql db integration between them
I already cover this usecase in cqrs design pattern buddy please check
Thanks a lot!.
Tq basen. 🎉🎉🎉🎉
In the real World Springboot application how can we use Kafka, i mean We have lot of apis and rest classes
Bro can you make a video on jackson api and json to java obj and vice versa ?
can you please share git repo? above git repo is about springboot-apache-pulsar.
Please go to the root repo and just filter with Kafka
Hey Hi @Javatechie... I was following along and faced an issue while doing serialize and deserialize i was getting serialization exception... Then after checking whole lot of things i found out package name fro Customer class has to be same as one defined in consumer even if contents of class are same it wasn't working fine... So couldn't understand why this was happenning. Can you help me with this?
when deserialization in consumer side consumer, it uses the metadata about object which include while serialization. use these in consumer properties
spring.kafka.consumer.properties.spring.json.use.type_info_headers=false
spring.kafka.consumer.properties.spring.json.value.default.type=yourEntitynamewithpackage
spring.kafka.consumer.properties.spring.json.use.type.headers=false
Hello Amrit you need to soecify trusted package both from consumer and producer if it's different
I am trying to download kafka file on windows but every time getting editable notepad file Please guide me how to download
Thank you so much sir 🙏❤️
It would have been so great if there were timestamps. Other than that, it's all good
I will add it soon 🤠
I think each consumer group consumes all the messages from all the partitions rather one CG to one Partition, Correct me if Im wrong.
No buddy. Each consumer will listen to one partition if there cg is different
Nice tutorial. Where Can I find the source code used in the tutorial?
In video description
Hi brother!! In my offset explorer, I can see data which is sent by producer is saving as different word. Is this due to serialization or something?
No it's not because of the serialization issue please check at topic level you have to choose string as data format by default it will set byte array for you.
@@Javatechie ok.. Thanks brother
Properties -> Content Types -> String -> Update, then all the value will change from Byte to String 😎
Why fonts are so small? It is too difficult to watch.
May i know the part 2 link please for kafka
Part 2 not released yet.
Anyone can help me how to run zookeeper in windows?
Is this resolved ?
Do we need to know Java to learn from this tutorial???
Yes java knowledge required
That's the great question I have heard till now 😅
@@jhari4683 I meant to say is Python enough or do we need to know Java as well ... because in my organisation Kafka python is being used...
I hope you got it khari 😅
If you know python also that's enough but you need to find out integration steps brother. This course for java integration I don't think it helps you . But check first 4 videos it will give you complete picture of Kafka internal
Could we please have the pdf you used.
Can I get that ppt
🙏🙂👍
RabbitMQ also
Part 2 neiki asa
stop reading my mind please !!!
this is very boring . Too much explanation and less interaction . Better if we can start action side by side
Hello @javaTechie : around 1h:43m , while using the template to send the message to topic. getting the below error
Cannot invoke "org.springframework.kafka.core.KafkaTemplate.send(String, Object)" because "this.template" is null
@javatechie, I get the error in kafkaconsumer at 02:45:05
Caused by: org.springframework.messaging.converter.MessageConversionException: failed to resolve class name. Class not found [com.example.kafka_youtube_javatechie.model.User]
at org.springframework.kafka.support.mapping.DefaultJackson2JavaTypeMapper.getClassIdType(DefaultJackson2JavaTypeMapper.java:137) ~[spring-kafka-3.1.4.jar:3.1.4]
in your case, the Customer class is in the same package in both producer and consumer projects.
But in my case, the equivalent (User.java) is in different packages in both producer & consumer.
Can you please help?
turns out I had to use the following consumer configuration:
Map map = Map.of(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092", ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class, ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class, JsonDeserializer.TRUSTED_PACKAGES, "com.example.kafka_consumer_javatechie.model,com.example.kafka_youtube_javatechie.model",
JsonDeserializer.USE_TYPE_INFO_HEADERS, false, JsonDeserializer.VALUE_DEFAULT_TYPE, "com.example.kafka_consumer_javatechie.model.User");
Hi @mayurnagdev5545, I am getting the same error while following the same code. How did you got to solve that ?
@@2668rajan I am also getting this error.
Can you send me core java complete
Thank you