coderzc commented on PR #18478:
URL: https://github.com/apache/pulsar/pull/18478#issuecomment-1316690964
I think a way to keep it lock-free, we can use `SingleThreadEventExecutor`
of netty instead of `ExecutorService` and overwrite the `execute` method:
```java
class ReentrantSingleThreadEventExecutor extends SingleThreadEventExecutor {
@Override
protected void run() {
do {
Runnable task = this.takeTask();
if (task != null) {
runTask(task);
this.updateLastExecutionTime();
}
} while(!this.confirmShutdown());
}
@Override
public void execute(Runnable task) {
if (inEventLoop()) {
task.run();
} else {
super.execute(task);
}
}
}
```
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