curcur commented on a change in pull request #16531:
URL: https://github.com/apache/flink/pull/16531#discussion_r673712463
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/execution/Environment.java
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@@ -232,4 +234,20 @@ void acknowledgeCheckpoint(
IndexedInputGate[] getAllInputGates();
TaskEventDispatcher getTaskEventDispatcher();
+
+ //
--------------------------------------------------------------------------------------------
+ // Fields set in the StreamTask to provide access to mailbox and other
runtime resources
+ //
--------------------------------------------------------------------------------------------
+
+ default void setMainMailboxExecutor(MailboxExecutor mainMailboxExecutor) {}
+
+ default MailboxExecutor getMainMailboxExecutor() {
Review comment:
I will add the check in `RuntimeEnvironment Getter`
In MockEnvironment, both mailboxExecutor and asycnThreadPool are
initialized, and I marked the parameter of `set method` as not nullable. So a
`get method` won't return a null;
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