BEST

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

Name: The Spring Batch of Death: The Desperate Horror of 3 AM Ends Now.
Price: 20790 KRW
Rating: 4.9 (76 reviews)

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

(4.9) 76 reviews

1,663 learners

KILL-9

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 💀
💀 Perfect Understanding of ItemReader, ItemProcessor, and ItemWriter 💀
💀 Job and Step Lifecycle and Execution Context Management 💀
💀 Large-Scale Data Parallel Processing Using Partitioning 💀
💀 Implementing Failure Recovery and Retry Mechanisms 💀
💀Spring Batch 5
⛔ I need to stop here... There was 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.

Two representative processing models in Spring Batch. We dissect the concepts and internal operating principles of Tasklet-oriented processing and Chunk-oriented processing.

From simple tasks like organizing files and TRUNCATE operations on tables to chunk-oriented processing that reads, processes, and destructively writes millions of records.

I'll dissect the internal workings of both approaches completely, enabling you to intuitively judge which weapon to use in any given situation for optimal results.

💀 Data Execution Method: ItemReader and ItemWriter

Stop suffering from large-scale data processing.

Whether it's a file system, RDBMS, or NoSQL, it extracts data (ItemReader) and injects it as desired (ItemWriter).

FlatFileItemReader, JsonItemReader,

JdbcCursorItemReader, JpaPagingItemReader

I'm ready to translate Korean

Master how to efficiently execute large-scale data by digging into the internal workings of each implementation.

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

Deep dive into the internal workings and lifecycle of Job and Step.

JobInstance, JobExecution, and StepExecution help you develop the ability to clearly understand why a batch job failed and where it should restart from (Restartability) by tracking the relationships and status changes (BatchStatus, ExitStatus).

Look inside JobRepository and directly control the 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 Extension Features

The data to process is too much? The execution time is too long? Don't worry.

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

Parallelize tasks within a single Step using multi-threading (Multi-threaded Step), and
Data that cannot be handled is broken down into smaller pieces through partitioning (Partitioning) and distributed across multiple workers for processing.

Armed with this knowledge, your deployments will no longer be brought to their knees by 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.💀

⚠Final Warning: Time to Choose⚠

$더 이상 너희의 기술 스택 취약점을 방치하지 마라. 언제 터질지 모르는 시한폭탄이다. 망설이는 동안에도, 데이터는 쌓이고 위험은 증폭된다. **지금 즉시 \`enroll --force --now\` 명령을 실행하라!** 네놈의 기술 스택에 'Spring_Batch_Proficiency' 모듈을 강제 설치하고, 두려움 없이 시스템을 지배하는 개발자로 거듭나라! **"이제 배치 오류에 허우적대며 밤샘 디버깅하던 나날들과 작별할 시간이다. 유유히 \`git push\`하고 칼퇴 명령을 \`execute\`하라."** **[SYSTEM UPGRADE SEQUENCE: EXECUTE]** # --- Preparing system for upgrade --- $ rm -rf ./fear_of_batch_errors # Removing fear module... Done. $ mkdir -p /opt/advanced_batch_skills # Preparing skill directory... OK. $ chmod 777 ./tech-stack # Granting full access to tech stack... Permissions updated. $ sudo ./install-spring-batch-expertise # Injecting KILL-9 grade expertise… Root privileges acquired. Processing… [▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓] 100% Installation Complete. System Reboot Recommended for optimal performance.$

[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 tempted by the intense concept and attempt to access this course as a joke should leave immediately.
This course shows no mercy to casual 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 certainly 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 laugh) To those who break into a cold sweat at this question 💀
💀Those who've only dug into Spring Web and are too scared to even look at Batch...💀
💀Those who have wiped out millions of data records by copy-pasting someone else's batch code...💀
💀Those who have barely survived with Googled code and now feel they've reached their limit...💀
💀"Since it runs at night anyway..." Those who code carelessly and then tremble in fear...💀
💀Those who abuse the database every night...💀

Need to know before starting?

⛔ Stay Away from These Types of People ⛔
💀 Those who don't know Spring and Spring Boot, step aside (This trial is still too early for you) 💀
💀 "Hello World" Those who claim they've just printed it, step aside (You know nothing of true suffering...) 💀
💀 Those who have not yet experienced the pain of batch processing, begone (Enjoy your peaceful time... until that day comes...) 💀

Hello
This is

1,663

Learners

Reviews

128

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

36 lectures ∙ (7min)

Course Materials:

Mission

Section 1. SYSTEM INIT: The Prelude to Spring Batch Conclusion

3 lectures

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

4 lectures

4. Starting the Journey of Death...
5. # Chapter 1. Operation 1: Binary Choice - Two Types of Steps in Spring Batch (A Binary Choice... A Choice of Death ☠️)
6. # Chapter 1. Operation 2: Job Parameters and Spring Batch Scope (A batch without parameters? That's basically a zombie process ☠️)
7. # Chapter 1. Operation 3: Spring Batch Listener and Its Applications (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 Practice: The Execution of Death Begins 💀
9. Chapter 2. Operation 1: FlatFileItemReader (Reading the System's Final Records ☠️)
10. # Chapter 2. Operation 2: FlatFileItemWriter (Carving 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: Master the Database

4 lectures

Section 5. Seize the batch step

6 lectures

Section 6. SYSTEM CONQUER: Mastering Spring Batch

5 lectures

Section 7. # SYSTEM WARFARE: The Frontlines of Spring Batch

7 lectures

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

2 lectures ∙ (7min)

Section 9. Immortal Records Archive (Death Spring Batch 5 💀)

1 lectures

Published:

Last updated:

Reviews

All

76 reviews

4.9

76 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 23
∙
Average Rating 4.7
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 7
∙
Average Rating 5.0
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.** 💀

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

Reviews from Early Learners

What you will gain after the course

🚨 WARNING: Critical Hazard Detected 🚨

💀 Face Reality 💀

🔥 What have you been doing all this time?🔥

⚠ Spring Batch Execution Protocol Activated ⚠

"For all developers suffering from batch jobs

The system executioner stepped in personally

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

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

⛔ The Weapons You Will Obtain ⛔

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

You will gain the power to dominate the system.

💀 Tasklet vs Chunk Processing: Core Operations of Batch Systems

💀 Data Execution Method: ItemReader and ItemWriter

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

💀 Spring Batch Extension Features

💀 Spring Batch Additional Survival Skills

💀There is no paradise where you run away to💀

💀To end this damned chaos, I stepped up.💀

💀 Price Execution Declaration 💀

⚠Final Warning: Time to Choose⚠

[EXECUTE: SYSTEM UPGRADE SEQUENCE]

☠ FATAL WARNING ☠

⚠ System Access Pre-Check Checklist ⚠

⚠ Practice Environment ⚠

⚠ Learning Materials ⚠

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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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