kumar-mallikarjuna commented on code in PR #25027:
URL: https://github.com/apache/flink/pull/25027#discussion_r1681117423
##########
flink-runtime/src/main/java/org/apache/flink/runtime/dispatcher/DefaultJobManagerRunnerRegistry.java:
##########
@@ -97,6 +106,14 @@ public JobManagerRunner unregister(JobID jobId) {
return this.jobManagerRunners.remove(jobId);
}
+ public void setMainThreadExecutor(ComponentMainThreadExecutor executor) {
+ mainThreadExecutor = executor;
+ }
+
+ public ComponentMainThreadExecutor getMainThreadExecutor() {
+ return mainThreadExecutor;
+ }
+
Review Comment:
The main problem here seems to be the constructor chain we have in
`Dispatcher`.
Is [initializing these
attributes](https://github.com/apache/flink/blob/583aadf97b2e3ddc87d4d244c5d62823e82513b1/flink-runtime/src/main/java/org/apache/flink/runtime/dispatcher/Dispatcher.java#L272-L333)
outside of the `Dispatcher` constructor a bad idea (since the attributes must
be `final`)?
I'm thinking instead of having the constructor chain, we could have two
"base" constructors for `Dispatcher` only:
I:
```java
public Dispatcher(
RpcService rpcService,
DispatcherId fencingToken,
Collection<JobGraph> recoveredJobs,
Collection<JobResult> recoveredDirtyJobs,
DispatcherBootstrapFactory dispatcherBootstrapFactory,
DispatcherServices dispatcherServices)
```
and
II:
```java
protected Dispatcher(
RpcService rpcService,
DispatcherId fencingToken,
Collection<JobGraph> recoveredJobs,
Collection<JobResult> recoveredDirtyJobs,
DispatcherBootstrapFactory dispatcherBootstrapFactory,
DispatcherServices dispatcherServices,
JobManagerRunnerRegistry jobManagerRunnerRegistry,
ResourceCleanerFactory resourceCleanerFactory)
```
which call `super()` and a method `initDispatcher(...)` - to populate the
attributes.
This way, we'll have a separate constructor for tests which can receive
`jobManagerRunnerRegistry/resourceCleanerFactory` and we can build these two
params in constructor (I).
Alternatively, we can have two separate constructors which have redundant
initializations of the attributes, if they must be `final`.
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