vikramraj

[Ayush Shrivastava 🇮🇳 @ayshriv]

Mastering Spring Data JPA from beginner to advanced with practical examples, repository patterns, entity relationships, custom queries, pagination, transactions, and performance optimization in Spring Boot applications.

Read: https://t.co/41zJbskMUC

#SpringBoot #SpringDataJPA

[vikramraj @vicky131521]

⁦@SGanguly99⁩ you are the inspiration..thank you

[𝑺𝒂𝒏𝒅𝒉𝒚𝒂𝒂'𝒗 @vedicvenus_]

Responsibility builds maturity, not age!

[Vala Afshar @ValaAfshar]

There are at least 4 types of wealth:

1. Financial wealth (money)
2. Social wealth (status)
3. Time wealth (freedom)
4. Physical wealth (health)

Be wary of jobs that lure you in with 1 and 2, but rob you of 3 and 4. —James Clear

5. Spiritual wealth (peaceful mind)

[Alpha Prime @Alpha_Prime__]

Before you die as a man, do this:

• See your 6-pack once.
• Deadlift 2x your bodyweight.
• Do 10 pull-ups straight.
• Travel solo.
• Quit something that’s killing you. Job. Habit. Relationship.
• Build something of your own. Business. Project. Doesn’t matter. Just yours.
• Be the fittest in your group at 40.
• Wake up at 45 with no medications.
• Look in the mirror feeling proud and inspired.

Most men will never get here.

[StrongManGuide @StrongManGuide]

1. Kids want more dad time.
2. Wife wants more husband time.
3. Parents want more son time.
4. Work wants more of your time.
5. Bros need your time.

And you still show up.

Shoutout to the men doing it all.

May you always win.

[TotalBodyIQ @TotalBodyIQ]

this concept is so beautiful

[Vala Afshar @ValaAfshar]

Giving is a choice.
Honesty is a choice.
Optimism is a choice.
Happiness is a choice.
Forgiveness is a choice.
Spoken words is a choice.
Teaching others is a choice.
Respecting others is a choice.
Showing gratitude is a choice.

Remarkable people work hard to make better choices.

[SumitM @SumitM_X]

As a developer,

Please slap yourself if you can't explain at least 10 of these :

API Gateway
Load Balancer
Reverse Proxy
Rate Limiting
Throttling
Pagination
Cache stampede
Idempotency
GraphQL
gRPC
Webhooks
JWT
OAuth
Cache invalidation
Composite index
Query optimization
CAP THEOREM
ACID
Sharding
Circuit breaker
Livelock
CSRF
Backpressure
False sharing
mTLS

[Dear Son. @DearS_o_n]

At some point as a man, you should live like an athlete. You Eat on time, no junk, train every day, rest, no distractions, no parties. Just a dedicated life. Give it a try. You'll thank me later.

[Dan Go @CoachDanGo]

If you're in your 40's and you're not doing whatever you can to get yourself in shape you're doing it wrong.

Midlife is the "make it or break it" season for most people.

Researchers say people in their late 40s are increasingly having to deal with chronic health issues such as type 2 diabetes and high blood pressure.

Inflammation and insulin resistance are increased through a poor diet and sedentary lifestyle.

In midlife, most people in the West put on 3 to 4 pounds of weight per year and are more likely to lose muscle.

This decline sets them up for an abundance of medications that could have been prevented in their mid-age.

The worst thing I see with people who age is that it becomes increasingly difficult for them to change.

They get set in their own ways and this leads to a sense of apathy toward their health and lives.

Well, I'm here to say that it doesn't have to be this way.

You can be in better shape at 40 (and beyond) than you were in your 20's and set yourself up for a longer lifespan and health span.

But no one else can do it for you.

You gotta get up and get in the arena.

You don't get to be perfect. Just get started.

See you at the gym.

[Note To Self @Alphafiles1]

Normalize this by age 25;

• Wake up at 4 Am
• 4 hrs of deep work
• Keep your life private
• Spend 1 hr in the gym
• Mind your own business

I promise you'll win over 97% of people.

[Makakmayum @makakmayum_sid]

If you are appearing for Java interviews in 2026, Java 8 should be one topic that you need to prepare extensively.
Interview questions:

LAMBDA & FUNCTIONAL INTERFACE
1. What is a functional interface?
2. Is @FunctionalInterface mandatory?
3. Can a functional interface have default methods?
4. Why were lambdas introduced?
5. Lambda vs anonymous class

STREAM API (MOST IMPORTANT)
6. Stream vs Collection
7. Intermediate vs Terminal operations
8. map() vs flatMap()
9. filter() vs map()
10. findFirst() vs findAny()
11. limit() vs skip()
12. peek() – real use case
13. forEach vs forEachOrdered
14. reduce() explained with example
15. collect() – internal working
16. groupingBy() vs partitioningBy()
17. How to remove duplicates using Stream?
18. Parallel stream – when NOT to use?
19. Stream performance vs for-loop
20. Can we reuse a stream?
21. Lazy evaluation in streams

OPTIONAL (Tricky area)
22. Why Optional was introduced?
23. orElse vs orElseGet
24. Can Optional be null?
25. Is Optional Serializable?
26. Best practices for using Optional in APIs

DEFAULT & STATIC METHODS (Interfaces)
32. Why default methods were introduced?
33. Multiple interface default method conflict – how resolved?
34. Can a default method be overridden? '
35. Static methods in interface – use case?

DATE & TIME API
27. Date vs LocalDate
28. LocalDate vs LocalDateTime
29. ZonedDateTime – real use case
30. How to convert String to LocalDate?
31. Thread safety of Java 8 Date-Time API

[SumitM @SumitM_X]

As a senior backend developer,
Please learn these important design patterns(at least 2 from every section) :

1. Creational Patterns
-Singleton: Ensures a single global instance.
-Factory Method: Creates objects without specifying classes.
-Builder: Constructs complex objects step-by-step.

2. Structural Patterns
- Adapter: Connects incompatible interfaces.
-Decorator: Dynamically adds functionalities.
-Facade: Simplifies complex subsystems.

3. Behavioral Patterns
-Observer: Notifies dependents of state changes.
-Strategy: Switches algorithms at runtime
-Command: Encapsulates requests as objects.

4. Concurrency Patterns( Java specific)
-Thread Pool: Reuses threads for multiple tasks
-Future/Promise: Manages async results
-Blocking Queue: Safe producer-consumer handling

5. Architectural Patterns
-MVC (Model-View-Controller): Separates data, Ul, and logic layers.

[Dhanian 🗯️ @e_opore]

How Java’s JVM Executes Bytecode

You write Java source code (.java files).
The Java compiler (javac) compiles your source code into platform-independent bytecode (.class files).
The Java Virtual Machine (JVM) loads the bytecode using the Class Loader, verifies it for security and correctness, and prepares it for execution.
At runtime:
→ The JVM Interpreter reads bytecode instructions and executes them line by line.
→ The Just-In-Time (JIT) compiler identifies frequently executed code (hot spots) and compiles it into optimized native machine code.
→ The JVM manages memory using the heap and stack, handles object allocation, and performs garbage collection to reclaim unused memory.
→ It provides a runtime environment with core libraries, threading support, exception handling, and system-level services.
The result: your Java programs run efficiently as native machine code while remaining portable across different operating systems and hardware platforms.

→ Want to go deeper? Check out this ebook:
Java: The Complete Handbook
https://t.co/yZQtybLQuv

[Ayush Shrivastava 🇮🇳 @ayshriv]

SpringBoot #java

[Dear Son. @DearS_o_n]

Nobody claps for discipline.

Nobody cheers for consistency.

But one day, everyone will notice.

Show up every day to fix your life.

Do it alone.
Do it broke.
Do it tired.
Do it scared.

Just do it.

[Akshay Shinde @ConsciousRide]

As an Engineer you should know the following concepts

Idempotency → Prevents duplicate payments
Pagination → Keeps your DB from dying
Versioning → Lets you evolve APIs without breaking clients
Rate limiting → Protects your service from abuse
Error codes → Helps clients handle failures correctly
Caching → Reduces load by 90%
JWT security → Prevents leaking sensitive data
N+1 queries → The difference between 10ms and 10s response time
Docs → Stops the `how does this API work?` Slack messages
Consistency → Choose the right tradeoff for your use case

[Makakmayum @makakmayum_sid]

Microservices, System design with Java's Spring boot is truly magical from my experience.

Rate limiting in System design:- One user or service can't call an API too often and bring it down

Spring boot's Bucket4j lib can be used to implement Rate Limit Filter

It can:
- protect from primitive DDoS attacks
- protect from bad clients that send requests in a loop
- limit number of requests per time unit
- make fair access a little for everyone, not everything for one

Really simple, fast and thread-safe.

- On each request it checks if there is a client key (for example IP) in cache, and if not creates a bucket with tokens for it.
- Every time it tries to take one token from the bucket, the right to execute a request.
- If there is a token in the bucket - you pass. If tokens are over - get HTTP 429 and wait for refill.

Notes:
-> request.getRemoteAddr() - finds the correct way to get client IP, maybe from request.getHeader("X-Forwarded-For")
-> new ConcurrentHashMap<>() - it is not cleaned automatically, think how long to store data and how to clean it if you have a lot of requests.
-> the limit is set the same for all endpoints. Often different APIs have different load, so it makes sense to set different limits (by URL, HTTP method or operation type).
-> refillGreedy() - just one way to refill tokens. There are other strategies (smooth refill, fixed intervals) that allow more precise load control.
-> move all settings to application.yaml and use it without code changes.

A simple implementation to understand how the library works is provided: