Spring Boot | Spring Data Redis as Cache | @Cacheable | @CacheEvict | @CachePut | JavaTechie
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- Опубліковано 15 жов 2024
- This tutorial will guide you how to use Spring Data Redis as a cache to improve application performance
#javatechie #Redis #SpringBoot
Spring Data Redis as Database
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Sir, where is the primary data database to store data in redis , you didn't connect to any data base (such as MongoDb) as primary database so that we use Redis as Cache
I have a little bit of confusion here..
The DB being used is Redis and caching is being done at the application level.. which also is using Redis?
How do you configure which cache mechanism to be used then?
Thanks you @java techie, Your videos are very helpful for me. It made me learn Redis Basic in just few hours with example. thanks again appreciatable approach. 👍👌
Thanks buddy
Learnt so much from your videos. You are very good teacher and a very good person!! Thanks a lot🙏
Redis serves a cache purpose primarily here already I believe. the cacheable annotation is to make the method cacheable by conditions to Java in memory. Is my understanding correct?
Yes correct
Thank you for the video. I’m a newbie when it comes to cache, so is it possible to give more information about it. Like where is the data stored ? I guess it’s in the RAM but which one ? And what happens if the data changes in the mean time ? Does it mean that applications can possibly get an obsolete « snapshot » of the database because of caching ? Is that where the TTL comes handy ? Or is the « record » deleted from the cache if it changes ? Thank you very much
Lolz. His video tutorials are for medium skilled developers to go to Advanced level
Hi basant
I watched both the videos redis as db and redis as cache.In redis as cache video you are using redis as both db and cache . And also if we want we can replace db with any other one eg:oracle etc...
Am i right???
Where the cache data will be stored ...I think it’s in memory db... not stored in redis DB.....what if I have millions of records... will it stored in application itself??
No it won't store in application .
Always it store in in memory cache
@@Javatechie no Basant it's storing in local only ,,,try with by up another instance of same application... Then if you hit request then it's going and hitting database
@@sasi2182 Hi sasi, so when we use @Cacheable it is storing data in memory of the application right?
@@sasi2182 My doubt just got clarified thanks to this gentleman - ua-cam.com/video/1iLy8m33FV8/v-deo.html
Appreciate your efforts Basant. God Bless you.😊🙏
Very Nice Tutorial sir...Very Well Explained...Thank You
First of all, thank you very much, sir. I have a question. I want to build a micro-service based e-commerce web application. suppose, I have some services, like customer service, product service(only contain Title and description and the image & price fetches IMG & price from another IMG service & price service), order service, and cart service. In my product service, It is possible when I have static data. and I have tried it. But my question is how can I add a new product record (with all fields) from the admin service(admin panel) into the multiple services like IMG service, product service(Title and description), price service? Please make a video on how to add records into multiple services at a time?
Yes we can share same data accros multiple service through Rest API call
You can check my microservice first video from microservice playlist .you will get clarity on that
@@Javatechie thank you sir
Thank you for your videos...
I learnt more from your videos.
Very good explanation ❤️👌
I have small doubt Basant... here you are just configured Redis template in Redis configuration file then using cachable to cache product .. Here how spring comes to know that it needs to use Redis DB to cache data. Normally we need to implement spring interface Cache and CacheManager Then how it is working internally.
Because already we are using ResdisHasOps in our dao. Class and there we are persisting data into reddis server .
What is the type of cache used here,is it read through cache?
very nice video and thanks for the content Basant
I am getting error as Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
Bro resolve hua error apka
1.How is it implemented in application
2.What functionalities in application utilizes caching
3.How do you identify that a method uses caching from code
kindly reply me
Thanks, it will help in my career a lot. Great job. Keep going please.
Sir i applied cache for findAll() that time updated data not getting means after retrieving all data update and delete data not updating to findAll() getting previous data only how can i improve this problem
when you say get data from db? is it redis client or some sql db? because i see productdao getting data from redis. @Cacheable caches local memory?
I actually have the same question not clear here
Excellent.. but how compiler knows that you are using redis by annotation only??
O think you must add dependency
Thanks for providing such a nice explanatory videos
Hi @Java Techie,
I watch this video and used the same on my system but the @Cacheable and @CacheEvict functionality does not work for me.
get records not cached into the cache.
could you please help me?
It shouldn't be behaved like this.let me cross check and update you
Sir when we have devtool dependency in pom.
And when we call findbyid there its throwing classcast exception..
findById now returning Optional please check it properly
How to specify key in the cacheable method if the method has no parameter?
Specify default #id
You explained every thing very well, But I can' see you redis connection details ?
Buddy connection info mentioned in config class please check
same code I trying with Azure redis its not working , getting jedis connection exception
very helpful. Sir, what parameters we passed in @Cacheable . key is understood but doesn't understand value parameter. Can you please explain .
You can pass conditional parameter in value
Hi Basant bhai, Great tutorial !!! . is it possible to use Database as some other database but not Redis DB, and use Redis Cache to communicate between db and cache ?
Yes it's possible but I need to check about configuration
Hi Please let me know if you found any useful tutorials in this
What will happen if I have multiple instances of application running?
Your request will always landed to a single instance
@@Javatechie consider I have two instances running both instances cached value for key 1 then instance 1 receive delete request after that instance 2 receive get request what will i get then will instance 2 check database?
Thanks for the video. I have an order service and payment service, based on the payment service response I have to commit the value to DB. So whether it is possible to maintain the update operation in cache as an intermediate and once the payment is confirmed we can commit to actual DB.
No Satish cache will work behind the db. So if you update on db then it will reflect on cache not reverse
@@Javatechie Thanks for your response
Thanks for your making concepts easier. @Java Techie
Is it good idea to have 1 utility micro service for Radis caching or having in all 10+ persist micro services configured with redis interactions. We have like 100+ micro services with Kafka streaming.
Thank you for being teacher
I am Getting Exception,
org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection;
Hi Sir , I watched this video its great explanation, but i was looking for Something like Read Through ,Write Through and Asynchronous Caching, if there is some video or blogs can you please suggest me
I am wondering that, how this caching working without redis instance? We can use redis docker image for this work
Yes already I up my redis server , please checkout my previous tutorial.
In config I provided host and port of reddis instance and up it .
How can I store the cached data into any file and get the data from that file when required in code
Then why do you need cache?
@@Javatechie it's a large number of values , big table. So what will be the easier approach to get those as needed without a DB hit everytime.
Like a lookup service for the cache - lookup.getValue(key)
very much useful appreciate your effort
Informative video but I've a query. What is the difference between caching using @Cacheable and caching via RedisTemplate. Are these records not available in Redis DB if we cache via @Cacheable?
hello @java techie , can you tell me how to do update method. I want to implement in my college project. so can you help me on this. Thankyou in advanced. If you help me in that it will be the great.
i have searched like template.opsForHash(). (for update) I didnt find anything on that, If you help me, It will be the great. atleast which method should i use for update please.
can you confirm it, it will be the same as create please.
hello sir, how can i clear redis cache on booting the project , if not how can I clear cache manually?
Please check reference cache evict
flushall
What is the maven dependencies that we have to keep for redis??
Go to video description and checkout my GitHub link
Thanks for the video.. Can we see cache data? and we can store it in a memory I mean local disk?
Thank you Basant bhai, can you please explain more on the master slave implementation of redis?
Could you plz explain this cache mechanism with jwt token, aslo with spring security, login and logout.
I don't understand something. If Redis is itself a cache, and we are saving to redis, why use @Cacheable?
Nevermin, use this link to get clarified - ua-cam.com/video/1iLy8m33FV8/v-deo.html
Sir please do one video on how to establish a communication betweem two microservices by using message queues with one example..i.e.one microservice pass some data to another microservice to process it..like order microservice sends data to payments microservice..
Already covered this so You could check my spring cloud stream or Kafka producer & Consumer video .
hello, i have a question, when we cache every operation or any operation that we want what if there's changes happened in the database "update statment" in this case the data will fetch from the redis and they will took the oldest one "before the update ", can you please clarify about this ?
yes, but you can use @CachePut to synchronize date with cache
@@TheLeony2 Can you please give an example, I am trying but it does not update the list in the cache. I mean It is not updating the cache entry, after I call getall(I have cached previously) has same value as before.
Sir first of all Thank you so much for your All Video 🙏
Sir a request to you please make a video on jwt token blacklisting before expires and refresh token please please it’s my humble request .
Okay sure I will try this
How can MySQL update data in real time in redis cache?
Nice video but I don't see any reference to Redid here .. Did I miss anything ??
You are the best. No doubt
Thanks for this helpful tutorial. Can you have a tutorial how to setup your local redis? Thanks
Can i use database as mysql and redis for caching, if yes then how?
Yes we can
ua-cam.com/video/cVdQIWpuZk8/v-deo.html
Hi friend, thanks for another great tutorial. One quick question -- how do you set up TTL with this solution?
Initial 3 minutes were there in other video and need not be repeated here. @Cachable is added only in fetch records.
Again an excellent video from Java Techie..
Nice video sir.
Sir can you make a video on how to apply sharding in InMemory DB if it is possible .
Okay I will check this
Nice video, one more thing I would like to know that how can we set expiry date to to cache, and how can we clear all keys from cache without deleting records from database?
Thanks in advanced 🙏
Can @cachaeble be used even in non-spring classes?
This code is not working for me ..Getting a connection refused. Any one tried?
You need to start your redis server , I already started but missed to mention while recording video .
@@Javatechie Thanks.I will try
Thanks sir...
Nice one! very helpful.
simple and great videos!
Sir, is it possible to configure different Time To Live values for different cache values(endpoints)?
yes
Is there any course you provide
Hi basant could you please do video on file operations and kafka streams ??
Could you please check out my spring cloud playlist
Can you make a video on Spring boot + memcached ?
Very good video Sir
Прикольно что индусы даже не стараются говорить без акцента)
could you please teach me how to insert data to database and redis
it would be nice if show demonstrate "Product" hash with Relationships
Thank you !
Thanks Sir
But where you config redis cache?
Create video on handling shared cache in spring boot microservices
excellent! thanks.
Nice
Great video!!
Thank you
How to implement redix connection pool logic
i love you, java techie
Thanks 👍
sir make a video on spring-security saml
Okay I will
video good :))
we say the value not the balue :)
Hi
bro please learn to speak english we say cache not kece