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Java 8 CompletableFuture Tutorial with Examples | runAsync() & supplyAsync() | JavaTechie | Part 1

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Java Techie

Java Techie

Күн бұрын

Пікірлер: 93
@indraalapati989
@indraalapati989 2 жыл бұрын
Thank you Basant for making this. I would like to add one more point as completable future by default uses forkjoin pool, this pool has core pool size, if the application is IO intensive it is good to use overloaded constructor (thread pool) to achieve max throughput.
@Javatechie
@Javatechie 2 жыл бұрын
Thanks Indra for this info 👍🏻
@likithr.n9692
@likithr.n9692 4 ай бұрын
Can there be a better explanation than this, really awesome man!
@psudhakarreddy6548
@psudhakarreddy6548 Жыл бұрын
Thank you bro. I learned many things from your channel.
@Javatechie
@Javatechie Жыл бұрын
Keep learning buddy good to hear this 😍
@shubhampatidar6116
@shubhampatidar6116 Жыл бұрын
I like your code proof for everything - Thanks for your continuity
@abhishakchauhan4580
@abhishakchauhan4580 4 ай бұрын
Suppose in 1 function you have execute three method inside CF and T1, T2, T3 start Now on T1 thread, in this method i want to split in more sub task because i have some complex logic in first method T1. 1 T1. 2 T1. 3
@AxeTvCommunity
@AxeTvCommunity 2 жыл бұрын
💯 Best explanation compared to any other resource out there Please keep making videos🙏
@Javatechie
@Javatechie 2 жыл бұрын
Thanks buddy
@sateesh9525
@sateesh9525 Жыл бұрын
very good video for completable future videos
@insane2539
@insane2539 2 жыл бұрын
Hi java techie bro need video tutorials of 1.Aws batch to implement cron jobs in spring boot 2.Implementing swagger into your microservice and using swagger to generate client call stubs 3.Implementing elastic search for search in your spring boot modules Please make these tutorials also!!!!
@Javatechie
@Javatechie 2 жыл бұрын
1 & 2 both are good content . I will prepare this but 3rd one already there please have a look
@insane2539
@insane2539 2 жыл бұрын
@@Javatechie Also bro 3. Implementing amazon codebuild, codepipeline in your microservice in spring boot for CI/CD 4. Implementing Liquibase in spring module to manage schema changes across multiple environments like qa,uat,prod,test
@Javatechie
@Javatechie 2 жыл бұрын
@@insane2539 I am not sure whether you gone through my AWS playlist or not .
@insane2539
@insane2539 2 жыл бұрын
@@Javatechie ok ill check it
@rameshchowdarapally
@rameshchowdarapally 4 ай бұрын
Great content
@venkatah9847
@venkatah9847 2 жыл бұрын
Thank you for this video and this will be really helpful for one of my tasks that i am working on. Thank you for your efforts.
@adityavyas6603
@adityavyas6603 2 жыл бұрын
Thanks @Basant thank you for this wonderful tutorial...
@sreetmi1918
@sreetmi1918 10 ай бұрын
This is a wonderful work I say.. great job basant...
@yogeshchaudhary621
@yogeshchaudhary621 2 жыл бұрын
Thanks for explaining in the simplest way possible.
@seatconnect224
@seatconnect224 2 жыл бұрын
best tutorials
@PradeepKumar-db7pe
@PradeepKumar-db7pe 6 ай бұрын
Thanks @JavaTechie! One Question - when you write runAsyncFuture.toCompletableFuture(); Do we conditionally complete it using if? or it is completed by auto-detecting the blocking state?
@chamithfernando2663
@chamithfernando2663 2 жыл бұрын
good explanation
@user-ew9dy9rm8b
@user-ew9dy9rm8b 10 ай бұрын
Good explanation keep it up. Include where to shutdown executor
@neha6000
@neha6000 2 жыл бұрын
Great video again thanks
@pnworks9186
@pnworks9186 Жыл бұрын
Thank You Sir.
@shahrukshaikh185
@shahrukshaikh185 2 жыл бұрын
Bravo..!!!!
@AHMADRAZAKHANjava
@AHMADRAZAKHANjava 2 жыл бұрын
Much respect for this video.
@aasthadubey1891
@aasthadubey1891 2 жыл бұрын
Good content. Thank you .
@sureshsadanala4639
@sureshsadanala4639 2 жыл бұрын
Great content Basant. Thank you :)
@harshverm776
@harshverm776 4 ай бұрын
Thanks Buddy !!!
@abhishekwasave9010
@abhishekwasave9010 2 жыл бұрын
Very well explained video with real example ..thanks it helped alot 👍👏
@pratishrutipanda6461
@pratishrutipanda6461 2 жыл бұрын
Nice content 👍
@funcoding1797
@funcoding1797 2 жыл бұрын
Great bro... tnx alot
@harish-wi3ts
@harish-wi3ts 2 жыл бұрын
Awesome...
@fitcoder2021
@fitcoder2021 2 жыл бұрын
Great job sir 👍
@Moulik23
@Moulik23 2 жыл бұрын
Thank you for this awesome topic.
@farhaankazi7134
@farhaankazi7134 10 ай бұрын
Hi Java Techie, You gave the example of runAsync(). In that you called get(). My question is that is correct that the main thread calls get() method of completable future instance, because in that case only CompletableFuture will get chance to complete processing. CompletableFuture has Daemon threads if main thread dies then daemon will be automatically died. If we did not use get method rather we use callback then we have to make the main thread sleep for seconds so that CompletableFuture and its callback will get chance to complete process otherwise daemon threads of CompletableFuture, will die along with main thread of JVM.
@niteeshchandanshire4381
@niteeshchandanshire4381 9 ай бұрын
Thank you sir for such explanation 🙏🏻
@ankxy1
@ankxy1 7 ай бұрын
Great 👍
@monsterhuntergo
@monsterhuntergo Жыл бұрын
Awesome video. I would like to ask the difference between Executor and ExecutorService ... and Future and FutureTask? When and which one to use? thanks
@oshogarg5215
@oshogarg5215 Жыл бұрын
yes , please tell @JavaTechie
@MuresanVladMihail
@MuresanVladMihail Жыл бұрын
💯
@shyamthe1
@shyamthe1 2 жыл бұрын
Always on point. Videos from this channel are very practical and easy to follow even the complex concepts. Appreciate the time and effort spent in creating it. Is there a video that explains different threadpool mechanisms in the executor service?
@Javatechie
@Javatechie 2 жыл бұрын
Thanks buddy , I will cover that as well
@ankitbhatia6128
@ankitbhatia6128 Жыл бұрын
Good content..
@9703080696
@9703080696 2 жыл бұрын
Very good explanation 👌
@bireshsingh6305
@bireshsingh6305 2 жыл бұрын
Thank you so much for this another good content.
@user-nv1bp6fk6z
@user-nv1bp6fk6z Жыл бұрын
Please do a video on to clarify callable, completablefuture and executor.
@MuraliM.A.
@MuraliM.A. 2 ай бұрын
Thanks for the video, what is the advantage using own executors over the global poo thread?
@Mahesh-ry9oe
@Mahesh-ry9oe 2 жыл бұрын
Nice tutorial But we can achieve also using lisnable future it's having addcallback method which is non blocking . We can execute rest of code.
@vipulnigam5019
@vipulnigam5019 Жыл бұрын
We can use invokeAll() by adding all these futures in list
@noumaanmohammad1274
@noumaanmohammad1274 2 жыл бұрын
Awesome video. get method wont be blocking main thread until supply async completes its task? If yes can we have whencomplete method?
@fabricioaraujo7642
@fabricioaraujo7642 2 жыл бұрын
thanks a lot man !!
@nikhileshyoutube4924
@nikhileshyoutube4924 2 жыл бұрын
Bro make a video on java developer learning path for junior developer's & upcoming fresher's
@kelvintsangxxx7581
@kelvintsangxxx7581 2 жыл бұрын
thx
@ainigma100
@ainigma100 6 ай бұрын
Thank you for the video! Is it possible to use this approach assuming the following scenario? We have a method in the service layer that is calling inside 6 external services using feign client. We would like to call them in parallel to reduce the execution time. Keep in mind that each of these API calls is also validation the data they receive. If all the checks of every external API call is ok, then we are fine. In case at least one of the API results does not satisfy our conditions, we have to throw an exception. Can we use this approach or there is another way to do it? Thank you in advance for your time!
@Javatechie
@Javatechie 6 ай бұрын
Yes absolutely possible if the rest call itself throws an error then it will automatically terminate
@dineshreddyambu
@dineshreddyambu Жыл бұрын
Spring webflux will also do the same . How it is different from mono and flux?
@Javatechie
@Javatechie Жыл бұрын
Dinesh both are non comparable buddy
@rishikeshkmr
@rishikeshkmr 3 ай бұрын
Can't we use try catch block to handle the exception in case of Future
@anjalikotha595
@anjalikotha595 6 ай бұрын
Hi sir can you pls upload junit groovy test classes for unasync methods
@biswajitmaity1128
@biswajitmaity1128 2 жыл бұрын
Couple of example showing here , using get() method which are blocking threads , why ? Why are you not using complete() method ?
@Javatechie
@Javatechie 2 жыл бұрын
It's just a demo video to demonstrate all methods buddy
@preetird8385
@preetird8385 2 жыл бұрын
Hi sir could you please make a video on how to mock "supplyAsync" method of completablefuture in Junit class. I'm stuck there and tried everything possible on GitHub and stack overflow. It's failing or going into infinite loop. The scenario is that supplyAsync method is overridden in the class.
@Javatechie
@Javatechie 2 жыл бұрын
Okay let me try
@srikarthikeyakante3152
@srikarthikeyakante3152 2 жыл бұрын
Sir, I was trying to implement a scheduler cron job which will take cron expression from database when ever the application starts.but challenge here is how to get cron expression from table with out restart of application.can you make a video on this??
@mayurkadam1926
@mayurkadam1926 2 жыл бұрын
Use quartz scheduler with jdbc implementation
@Javatechie
@Javatechie 2 жыл бұрын
Use @PostConstruct
@srikarthikeyakante3152
@srikarthikeyakante3152 2 жыл бұрын
@@Javatechie Sry sir I have edited my question..I need to get cron expression from table with out restarting the application.scenariio is I have inserted cron expression for 5 mins and after that I changed to 10 mins.i need to get expression from table with out restarting the spring application. Thanks
@shubhamsingla4289
@shubhamsingla4289 10 ай бұрын
any one suggest, I don't want to hold my main tread to complete the executions of child treads, so that i can return the response as soon as i started by async method.
@tejay1551
@tejay1551 2 жыл бұрын
Thanks for this tutorial, I have few queries : why only one thread used when we pass executor service with thread pool of size 5? is there any way to spin up multiple threads if the file is large?
@Javatechie
@Javatechie 2 жыл бұрын
Since I am playing here with less data . which can be handled by single thread but even I tried to spin up with multiple thread with 1k records but not getting different behaviour.
@tejay1551
@tejay1551 2 жыл бұрын
@@Javatechie may be the behaviour AS IS to Read one file --> one thread.
@Javatechie
@Javatechie 2 жыл бұрын
I will dig this and let you know
@tejay1551
@tejay1551 2 жыл бұрын
@@Javatechie Thank you.
@smithaitufe6984
@smithaitufe6984 2 жыл бұрын
​@@Javatechie thanks for the video. Any feedback from your digging?
@vsprasadavantsa7203
@vsprasadavantsa7203 Жыл бұрын
Thanks
@Javatechie
@Javatechie Жыл бұрын
Thank you buddy 🤗
@monsterhuntergo
@monsterhuntergo Жыл бұрын
Pls help share the link of the next video? thanks so much
@Mike-ci5io
@Mike-ci5io Жыл бұрын
You can pass a CountDownLatch to the futures to join them
@oshogarg5215
@oshogarg5215 Жыл бұрын
do you also have a video on Executor Service?
@Javatechie
@Javatechie Жыл бұрын
No buddy
@rohitsutar2752
@rohitsutar2752 Ай бұрын
Still we are blocking main thread
@valkyriegaming478
@valkyriegaming478 Жыл бұрын
How to mock completablefuture in mockito
@signorealex
@signorealex 2 ай бұрын
Thanks for the content 🙂 I think the correct method is complete() and not toCompletableFuture () - mintutes 28:50 kzfaq.info/get/bejne/fbBlh9tlmNeae4E.html
@arunmenon1025
@arunmenon1025 Жыл бұрын
where is the 3rd part?
@wazeeharaa8100
@wazeeharaa8100 2 жыл бұрын
Future.cancel ?
@ayushjain7555
@ayushjain7555 6 ай бұрын
the video is not making any sense
@agarwalr5205
@agarwalr5205 2 ай бұрын
You need to understand multi-threading concepts first, then this video will make sense and you will be able to co-relate the traditional multithreading and the advantages of using CompletableFuture. I hope this helps.
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