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Author SHA1 Message Date
asmhatre 6af6e4a3f1 Add the scheduling module 
Three replicas of one application against one PostgreSQL database, proving
duplicate @Scheduled execution and then removing it with ShedLock: 24
executions where 8 were due, then 7 for 7 ticks.

Also measured: @SchedulerLock without @EnableSchedulerLock does nothing and
warns about nothing; spring.task.scheduling.pool.size=1 does not starve a
fixedRate job but delays it and fires 35 of 40 executions in a burst; and a
node whose clock is 40 seconds fast takes a live lock unless the provider
uses usingDbTime().
 2026-09-01 23:28:06 +05:30
asmhatre 243cccd4ca Add the async module 
Every @Async behaviour that surprises people, asserted by a test and captured
to docs/output/: the self-invocation trap, what CGLIB cannot override, the
IllegalArgumentException a plain return type throws, the unbounded queue that
makes max-size decoration, spring.task.execution.propagate-context (new in
Boot 4.1.0), the two Executor beans that leave @Async on an unpooled
SimpleAsyncTaskExecutor, and JEP 491 measured on JDK 21 against JDK 25.
 2026-09-01 23:27:47 +05:30
1 changed files with 1 additions and 1 deletions
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async/docs/06-context-propagation.md
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@@ -52,6 +52,6 @@ against `ContextRegistry`. Two tests differ only in the property:
`SecurityContext` propagation is a related but separate mechanism, with its own set of ways to
get it wrong; that is covered in
[Spring Security Context Propagation: The Complete Guide](https://ankurm.com/spring-security-context-propagation-complete-guide/).
[Virtual Threads and SecurityContext Propagation](https://ankurm.com/spring-security-virtual-threads-context-propagation/).
next: [Which executor runs it](07-which-executor-runs-it.md)