Spring Boot - Async Processing
You want to schedule two tasks: one runs every 10 seconds, another runs every 15 seconds. How can you ensure they never run at the same time?
You want to schedule two tasks: one runs every 10 seconds, another runs every 15 seconds. How can you ensure they never run at the same time?
hard📝 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Understand scheduling overlap
fixedRate and fixedDelay do not guarantee no overlap; synchronized blocks only affect method concurrency.Step 2: Use cron to control exact start times
Using cron with different seconds values staggers execution times to avoid overlap.Final Answer:
Use cron expressions with different seconds values to stagger start times -> Option CQuick Check:
Stagger tasks with cron seconds field = B [OK]
Quick Trick: Cron lets you control exact start seconds to avoid overlap [OK]
Common Mistakes:
- Assuming fixedDelay/fixedRate prevent overlap
- Using synchronized without effect on scheduling
- Using @Async which runs tasks concurrently
Master "Async Processing" in Spring Boot
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