BEST

The Spring Batch of Death: The Desperate Horror of 3 AM is Now Over.

Name: The Spring Batch of Death: The Desperate Horror of 3 AM is Now Over.
Price: 99000 KRW
Rating: 4.9 (79 reviews)

"Let's put an end to Spring Batch. Putting a stop to the dark ages of batch code.💀"

(4.9) 79 reviews

1,725 learners

Level Basic

Course period Unlimited

KILL-9

스프링

텍스트 강의

Java

Spring

Spring Boot

Spring Batch

backend

스프링

텍스트 강의

Java

Spring

Spring Boot

Spring Batch

backend

Reviews from Early Learners

What you will gain after the course

💀 Spring Batch's Chunk-Oriented Processing Model and Tasklet-Oriented Processing 💀
💀 A Complete Understanding of ItemReader, ItemProcessor, and ItemWriter 💀
💀 Implement failure recovery and retry mechanism (both Batch5 & Batch6 model) 💀
💀 Job and Step Lifecycle and Execution Context Management 💀
💀 Multi-threaded Step (both Batch5 & Batch6 model) 💀
💀 Large-scale Data Parallel Processing Using Partitioning 💀
💀 SEDA Pattern Using Local Chunking and Parallel Steps 💀
💀Spring Batch 5 & (NEW)Spring Batch 6 💀
⛔ I should stop here... There's so much that the system almost crashed. (Don't worry. I'll teach you everything)⛔

💀 Tasklet vs Chunk Processing: Core Operations of Batch Systems

Did you think the batch code execution flow was a hidden black box? How naive.

We dissect the concepts and internal operating principles of Spring Batch's two representative processing models: Tasklet-oriented processing and Chunk-oriented processing.

From simple file organization, one-time tasks like table TRUNCATE, to chunk-oriented processing that reads, processes, and destructively writes millions of records.

I will completely dissect the internal workings of both approaches so you can instinctively judge which weapon to use in any given situation.

💀 Data Execution Methods: ItemReader and ItemWriter

Stop suffering from large-scale data processing.

Whether it's a file system, RDBMS, or NoSQL, extract data without discrimination (ItemReader) and inject it as desired (ItemWriter).

FlatFileItemReader, JsonItemReader,

JdbcCursorItemReader, JpaPagingItemReader

Whether it's RDBMS or NoSQL, it extracts data indiscriminately (ItemReader) and injects it as desired (ItemWriter). FlatFileItemReader, JsonItemReader, JdbcCursorItemReader, JpaPagingItemReader

Dissect the internal workings of each implementation and master how to efficiently execute large-scale data.

Paging? Cursor? Your ignorance about what's appropriate when ends now.

Deeply dissect the internal workings and lifecycle of Job and Step.

By tracking the relationships and state changes (BatchStatus, ExitStatus) of JobInstance, JobExecution, and StepExecution, you'll develop the ability to clearly understand why a batch failed and where it should restart from (Restartability).

Look inside JobRepository and directly control metadata to transparently manage the batch execution flow that once seemed like a black box. No longer be flustered by unexpected failures. Everything is under our control.

💀 Spring Batch Advanced Features (The image above is exclusive to Batch 5. I chose this one because it looks cooler.)

Too much data to process? Execution time too long? Don't worry.

When basic weapons aren't enough, special equipment is prepared to explode batch performance.

Parallelize tasks within a single Step with multi-threading (Multi-threaded Step),
When data becomes unmanageable, use Partitioning to split it into smaller pieces and distribute them across multiple workers for processing.

Armed with this knowledge, your batch jobs will no longer buckle under performance issues.
The true thread safety of Spring Batch has been clarified more clearly than anything else, so you can use it with confidence.

Now it's time for the batch system to fear you.💀

💀 Spring Batch Additional Survival Skills (The image above is exclusive to Batch 5. I chose this one because it looks cooler.)

Strategies to contain and control failures with Skip/Retry policies.
Complete mastery of state management using ItemStream and batch job stop/restart mechanisms.
How to design complex job flows with Spring Batch Flow.
How to monitor every moment of batch processing with various Listeners

It will take time to master all the weapons perfectly.

But don't worry.

My battle experience gained through blood and sweat will accelerate your growth. 💀

⚠ Final Warning: The Time to Choose is Now ⚠

[EXECUTE: SYSTEM UPGRADE SEQUENCE]

# --- Preparing system for upgrade ---

# Removing fear module... Done.
$ rm -rf ./fear_of_batch_errors           
# Preparing skill directory... OK.
$ mkdir -p /opt/advanced_batch_skills     
# Granting full access to tech stack... Permissions updated.
$ sudo chmod 777 /opt/advanced_batch_skills                  
# Injecting KILL-9 grade expertise... Root privileges acquired. Processing...
$ sudo ./install-spring-batch-expertise   
[▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100% Installation Complete. 
System Reboot Recommended for optimal performance.

☠ FATAL WARNING ☠

$ cat warning.txt

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚠️  WARNING  ⚠️
[FATAL ERROR] Access Restriction Detected
[PROCESS ID]: #KILL-9_WARNING_PROTOCOL
[STATUS]: Critical
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

Those who are merely tempted by the intense concept and attempt to access this course as a joke, leave immediately.
This course shows no mercy to light curiosity attempting access without sudo privileges.


I only want those who truly wish to walk the path of 'System Dominator'.
I warn you clearly. Only those prepared to endure until the end of this suffering should take this course.


Your time is precious. Do not waste it.
Only those with the genuine will to learn can bear the weight of this code.
Only those who faithfully follow through to the end of the course will become true masters of Spring Batch.


[ADDITIONAL NOTE]
Even those who already have Spring Batch experience are welcome if "the will to follow diligently" is detected.
$ ls -la /home/user/ | grep determination
You will surely gain much.


# The choice is yours. But I will execute the consequences.💀

$ sudo sound-off --tactical-report --system-status=spring-batch --volume=maximum --force

Recommended for
these people

Who is this course right for?

💀 "Can you handle Spring Batch?" ... (cold laughter) To all the soldiers breaking out in cold sweat at this question 💀
💀For those soldiers who only dig into Spring Web and are too scared to even look at Batch...💀
💀To the soldiers who have lost millions of records by copy-pasting someone else's batch code...💀
💀For those soldiers who barely survived with Googled code and are now reaching their limits...💀
💀"Since it's going to be running at night anyway..." To those soldiers trembling in fear after hastily putting it together...💀
💀Soldiers who abuse the database every night...💀
⛔ Anyone who wants to join KILL-9 SQUAD...⛔

Need to know before starting?

⛔ Don't approach people like this ⛔
💀 Those who don't know Spring and Spring Boot, begone (This trial is still too early for you) 💀
💀 Step aside, those who claim they've just printed "Hello World" (you know nothing of true suffering...) 💀
💀 Those who have not yet experienced the pain of deployment, begone (Enjoy your peaceful time... until that day comes...) 💀

Hello
This is

1,725

Learners

Reviews

130

Answers

4.9

Rating

Course

☠시스템 종결자의 선언 ☠

인프런의 지루한 강의들이여, 두려워하라.

나의 등장으로 이 모든 것이 끝난다.

너희의 비싼 강의료? 웃기지 마라.

살인적인 가성비로 모든 것을 파괴하겠다.

강사 소개

강사명 ☠

KILL-9

칭호 📛

시스템 종결자

특기 🔪

kill -9       # "프로세스 처형"
rm -rf        # "데이터 학살"
chmod -R 000  # "시스템 감금"

" 버그? 해킹? 웃기지마. 그딴 잔머리로는 시스템을 지배할 수 없다. 난 정면으로 파괴한다. "

(인프런 강의 소개 페이지 alert() 취약점은 내 처녀작이었지. 이제는 더 강력한 무기를 쓴다. - 진짜임)

취미 💣

콘센트 정리     # "코드는 뽑아야 제맛."
CPU 고문       # "팬 소리가 울려 퍼질 때, 나는 살아있음을 느낀다."
전리품 수집     # "코어 덤프"

좌우명 🔥

"선은 뽑으라고 있는 것이다" 

"버그는 죽여서 고치는 것이다"

"LGTM (Looks Gone To Me)"

경고 🧨

"격식 따위 필요없다. 그냥 편하게 킬구형이라 불러라."

"존댓말로 질문하면 rm -rf 시전한다."

통신 접점 📡

kill9.no.mercy@gmail.com  # "강의 외의 명령 전송용. ACK는 기대하지 마라."

⚠️ CONFIDENTIAL: DO NOT LOG ⚠️

# 사실... 카카오에서 조용히 일하는 평범한 개발자에요...

Curriculum

All

67 lectures

Section 1. SYSTEM INIT: The Prelude to the End of Spring Batch (Death Spring Batch 5)

3 lectures

Section 2. SYSTEM BUILD: The First Step to Mastering Spring Batch

4 lectures

4. Beginning the journey of death...
5. Chapter 1. Operation 1: Binary Choice - Two Step Types in Spring Batch (Either-or... a deadly choice ☠️)
6. Chapter 1. Operation 2: Job Parameters and Spring Batch Scope (A batch without parameters? That's just a zombie process ☠️)
7. Chapter 1. Operation 3: Spring Batch Listener and Its Usage (Listener... The One Who Watches Every Moment of Execution and Death ☠️)

Section 3. SYSTEM EXECUTE: Execute the system through file processing

4 lectures

8. Transition to Action: The Execution of Death Begins 💀
9. Chapter 2. Operation 1: FlatFileItemReader (Reading the System's Final Records ☠️)
10. Chapter 2. Operation 2: FlatFileItemWriter (Engraving Death into Files ☠️)
11. Chapter 2. Operation 3: Reading and Writing JSON Files (The Truth Within Curly Braces, Its Beginning and End ☠️)

Section 4. SYSTEM DOMINATE: Dominate the Database

4 lectures

Section 5. SYSTEM TAKEOVER: Seize the Batch Step

5 lectures

Section 6. SYSTEM CONQUER: Conquering Spring Batch

5 lectures

Section 7. SYSTEM WARFARE: The Front Lines of Spring Batch

7 lectures

Section 8. Chapter 7. SYSTEM TERMINATE: Exterminate Even the Final Bug ☠️

2 lectures

Section 9. SYSTEM INIT: The Prelude to the End of Spring Batch (Death Spring Batch 6)

2 lectures

Section 10. SYSTEM BUILD: The First Step to Ending Spring Batch (Death Spring Batch 6)

4 lectures

Section 11. SYSTEM EXECUTE: Execute the System with File Processing (Death Spring Batch 6)

4 lectures

Section 12. SYSTEM DOMINATE: Dominate the Database (Death Spring Batch 6)

4 lectures

Section 13. SYSTEM TAKEOVER - Hijack the Batch Step (Death Spring Batch 6)

5 lectures

Section 14. SYSTEM CONQUER: Conquering Spring Batch (Death Spring Batch 6)

5 lectures

Section 15. SYSTEM WARFARE: The Frontlines of Spring Batch (Death Spring Batch 6)

7 lectures

Section 16. Chapter 7. SYSTEM SHUTDOWN

2 lectures

Published:

Last updated:

Reviews

All

79 reviews

4.9

79 reviews

qq211qq1594
Reviews 11
∙
Average Rating 4.6
5
32% enrolled
Death's Spring Batch course, this is truly the path of a real system executioner...☠️ If you thought Spring Batch was just another ordinary batch framework, you're gravely mistaken. kill-9's course doesn't give you theory—it gives you real weapons to survive in the bloody battlefield of actual combat. Flat files? Fixed-length? Complex log files? Instead of just saying "figure it out yourself," he explains everything sharp as a blade so you can actually use it in real work situations. Even when choosing a single delimiter, you'll understand "why it has to be done this way." Code, explanations, practice, execution commands... the entire course is filled with the mindset of "this is real combat." You're not just learning—you feel like you're becoming a 'batch terminator.' And the more you listen, the more confidence builds that someday you too will be able to leave a mark on systems with a single line of open source code. Batch prepared for death—are you still hesitating? The moment you take this course, you too become a true member of the 'kill-9 squad.' ☠️🔥
- kill9
  Instructor
  💀 System Terminator KILL-9 Course Review Confirmation Complete 💀 Such a killer course review... My system almost froze for a moment. **"kill-9 squad"** This expression is too powerful. My kernel shook. So? I adopted it immediately. From now on, we are the "kill-9 squad." From now on, you're not just developers. We are the system terminator squad. rm -rf mediocrity kill -9 boredom Welcome to the kill-9 squad, member. Squad member certification takes place on the battlefield within the course. We're not just some developers, we're the system terminator squad. Welcome to the kill-9 squad, member. - KILL-9 (Welcoming new squad members)
dkswhdgur2468873
Reviews 3
∙
Average Rating 5.0
5
24% enrolled
Text-based lectures.. I love being able to dissect, savor, and enjoy them at my own pace. Just as intended by the lecture format, I love not having to pause unnecessarily or use the rewind button. I just hope you'll provide more lectures💀☠️
- kill9
  Instructor
  💀 Welcome, I've finally met a true hacker 💀 Yes, this is it. Text is the best interface. - Mouse clicking? Waste of time - Video buffering? CPU abuse True masters use Command + F as a weapon. Like grep, extract only the information you want immediately. Text scrolling speed = Your learning speed However, there's an important warning: Never skip chapters 4 and 5. Many students miss the core of 스프링 배치 by skipping this part. If you thoroughly digest these two chapters, you'll reach a distinctly different level. Are you ready to deep dive?
javarunner
Reviews 76
∙
Average Rating 4.9
5
21% enrolled
- kill9
  Instructor
  Thanks, javarunner bro 💀
hjung
Reviews 24
∙
Average Rating 4.8
5
50% enrolled
Bro, keep the updates coming when versions upgrade! I'm counting on you, okay?!
- kill9
  Instructor
  💀 [SYSTEM ACKNOWLEDGMENT] 💀 [INCOMING TRANSMISSION FROM BATTLEFIELD] =============================================== [KILL-9 RESPONSE PROTOCOL ACTIVATED] Yeah Jeonghun hyung 💀 [COMMITMENT PROTOCOL ENGAGED] The system continuously evolves. Every time there's a version update, the lectures will be upgraded together. 💀 [UPGRADE GUARANTEE]
ske060080922
Reviews 8
∙
Average Rating 4.8
5
62% enrolled
Kilgu-hyung! I'd planned to leave a review after finishing the course, but I got so emotional watching the lectures that I'm writing it now. As Kilgu-hyung said early in the lecture, studying with text is truly difficult, but it definitely seems to stick in your mind more. Thanks to Kilgu-hyung's writing, it's great to learn so enjoyably and without difficulty. Thank you for such an incredibly cost-effective lecture, and I look forward to your future courses!
- kill9
  Instructor
  ██████████████████████████████████ █ ╔═════════════════════════════╗ █ █ ║ 💀 KILL-9 TACTICAL RESPONSE TERMINAL 💀 ║ █ █ ║ [ STUDENT REVIEW RECEIVED ] ║ █ █╚═════════════════════════════╝ █ █████████████████████████████████ Crackle... Student review data received... Emotional circuit activated... ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ You were overwhelmed with emotion?.. I'm the one who's overwhelmed with emotion.. I can't help but shed tears after seeing this review. 💀 Yes, it will be etched into your brain as much as it was painful. But remember. Gi-hoon hyung.. You will soon forget it. That doesn't mean it's useless. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ [KILL-9 MEMORY STRATEGY] "Huh? Where did I learn this?" "Oh, I think I've seen this somewhere before?" "Oh, I knew this before?" Maximizing these **'Oh, where is this from?' moments** is my and our course's core strategy and goal. Even with just this illusion, the lecture is definitely valuable enough. Because this is also **a type of secondary index**. 💀 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Complete Recall < Partial Recall + Index >> Complete Oblivion Warrior, a KILL-9 index has been built in your brain. 💀 █████████████████████████████ [ WARRIOR ADVANCEMENT REPORT ] You've completed up to Chapter 4's final operation... Many soldiers actually give up at this point or don't even attempt to learn at all, but You've worked hard, warrior. If you've broken through Chapter 4's final operation, you'll be able to sufficiently follow Chapter 5. I assure you that after breaking through Chapter 5, you will **know Spring deployment better than anyone else**. And Chapter 6... I guarantee it. The difference in understanding between **those who have thoroughly learned Chapter 4's final operation and Chapter 5 and moved on to Chapter 6** and those who haven't is completely different. Beyond simply memorizing a list of knowledge, it will be a different level because **the operational principles will be understood as if piecing together a puzzle**. ━━━━━━━━━━━━━━━━━━━━━━━━━ **Hyung, you can do it. And (though it's too obvious to pursue) thank you for the valuable review.** 💀

$77.00

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The Spring Batch of Death: The Desperate Horror of 3 AM is Now Over.

Reviews from Early Learners

What you will gain after the course

🚨 Warning: Critical Threat Detected 🚨

💀 Face reality 💀

🔥 What have you been doing until now?🔥

⚠ Spring Batch Execution Protocol Activated ⚠

" For all developers suffering from batch jobs

The System Executioner has stepped in personally

The desperate horror of 3 AM is now over.💀"

Arm yourself with the most up-to-date, most accurate Spring Batch course.💀

⛔ The Weapons You Will Obtain ⛔

Through this course, you will be equipped with the following deadly weapons,

you will gain the power to dominate the system.

💀 Tasklet vs Chunk Processing: Core Operations of Batch Systems

💀 Data Execution Methods: ItemReader and ItemWriter

💀 Job and Step Control: Seize the Heart of the Batch System

💀 Spring Batch Advanced Features (The image above is exclusive to Batch 5. I chose this one because it looks cooler.)

💀 Spring Batch Additional Survival Skills (The image above is exclusive to Batch 5. I chose this one because it looks cooler.)

💀 There is no paradise where you run to 💀

💀To end this damn chaos. I've stepped up.💀

💀 Price Execution Declaration 💀

⚠ Final Warning: The Time to Choose is Now ⚠

[EXECUTE: SYSTEM UPGRADE SEQUENCE]

☠ FATAL WARNING ☠

⚠ System Access Pre-Check List ⚠

⚠ Practice Environment ⚠

⚠ Learning Materials ⚠

Recommended for these people

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☠시스템 종결자의 선언 ☠

인프런의 지루한 강의들이여, 두려워하라.

나의 등장으로 이 모든 것이 끝난다.

너희의 비싼 강의료? 웃기지 마라.

살인적인 가성비로 모든 것을 파괴하겠다.

강사 소개

강사명 ☠

칭호 📛

특기 🔪

" 버그? 해킹? 웃기지마. 그딴 잔머리로는 시스템을 지배할 수 없다. 난 정면으로 파괴한다. "

취미 💣

좌우명 🔥

경고 🧨

Curriculum

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