wujimin commented on issue #2091:
URL:
https://github.com/apache/servicecomb-java-chassis/issues/2091#issuecomment-735520077
是的，新的Filter机制是将旧的各种扩展点全部归一化了，要实现的功能还是一样的
Filter的成员确实允许Autowire了
要切回eventloop，可以：
```java
VertxTransportContext transportContext = invocation.getTransportContext();
Executor executor =
VertxContextExecutor.create(transportContext.getVertxContext());
future.xxxAsync(xxx, executor)
.xxxxxx
```
xxx就在eventloop中执行了
要注意，future有个“特点”，下面用例中第二个apply不一定会在executor中执行，结果是由本线程与executor的真实执行顺序决定的，而这个顺序本身就是不确定的：
```java
@Test
@Disabled("用于证明jdk的CompletableFuture确实有问题，有较高概率出现，但是也不是必现；为防止CI概率性失败，改为手工执行")
void completable_future_thread_is_not_stable() {
for (int idx = 0; idx < LOOP_COUNT; idx++) {
CompletableFuture.completedFuture(null)
.thenApplyAsync(this::apply, executor)
.thenApply(this::apply)
.join();
}
assertThat(threadNames).containsExactlyInAnyOrder("main",
UT_THREAD_NAME);
}
```
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