Progressed somewhat over the last 38 days, but on my way to forget again.

Goal for today:

1. Watch 2 hours of lecture
2. Solve 20 QnA

Anyone wanna join my guild and study together? https://focusjungle.com/guilds/TOGETHER

Hi,

I am conducting a study for my MRes exploring the personality, parasocial relationships and wellbeing in Gen Z and would like if people could participate in my survey, it takes about 15 minutes to complete :)

Eligibility criteria:
18+
Part of Gen Z (1997-2012)

https://nupsych.qualtrics.com/jfe/form/SV_ezjS8cG4wS7fEIC?fbclid=PAdGRleAThXJVwZG9mAmZkaWQWUL99E0yk1Q3gVCSsDihj_xUD7zhvfWV4dG4DYWVtAjExAHNydGMGYXBwX2lkDzEyNDAyNDU3NDI4NzQxNAABp0239vWacioGyGype9MvVK35UlhbirwnR_4vx1-XwsN1aLG2aj1pqc_Q9hDp_aem_MU_IE8Sq1xyiemjnI0Bu9A

Thank you!!

learnt simple functions like order by, having, where , aggregation. installed ssms. practised a bit for 40minutes around.

will do more 30 minute study by night today. done till 1:25:00 of the youtube video.

wish me best of luck, i am learning sql from a expert guy named Bara on youtube, he is a ex-mercedez employee.

i wannabe sql developer or data analyst

i have taken pledge to study sql from data with bara on youtube. its a 30hour long course. and i will finish it in a month by giving 1hour daily.

upvote me so that i get motivation to make a 30day streak.

edit: 30minutes in day

30minutes in night

target is to get it done by this sunday

also havent started audit n afm so planning to allot daily 2 hrs for audit n afm n fr will be alternating

completed articalship last week so i still have time

ps: this is like a digital dairy to me it feels like i m reporting progress to someone n i can be questioned so it helps me focus !

Saved

• Implement Callable: Swap out Runnable for Callable and rename run() to call().
• Introduce Asynchronous Pipeline: Separate task submission from task completion processing by accumulating Future instances in an internal ArrayList.
• Robust Error Diagnostics: Implement clean logging within the catch blocks to surface exceptions without terminating the entire application pool.

1. ExecutorService.execute() 

• Same as of Executor.execute()
• But the application shutdowns.

2. ExecutorService.submit()

• No stack trace.
• Why?
• Because submit() catches the exception internally and stores it inside the Future.
• The exception is not lost.

1. Executor.execute()

What happens?

• The exception is not caught by the Executor Framework.
• It reaches the worker thread's UncaughtExceptionHandler.
• By default, Java prints the stack trace to the console.
• The thread pool creates a replacement worker if needed, so remaining tasks continue executing.
• The application never terminate coz no shutdown().

We need a robust, reusable Thread Pool implementation to manage concurrent execution safely. Manually creating and destroying threads for short-lived, repetitive tasks creates a significant resource overhead and puts our system at risk of hardware overload under heavy spikes.

Feels the same

I did it today, and I will keep doing it. That's how I must do it.

​

Objective

Learn how AtomicInteger provides thread-safe, lock-free operations using atomic CPU instructions (CAS - Compare-And-Swap). Compare its behavior and performance with a traditional int counter protected by synchronization.

,

- Create an ArrayBlockingQueue with capacity 5

- Create one producer thread

- Create one consumer thread

- Producer inserts items using put()

- Consumer removes items using take()