CODEWITHSUNDEEP
javamultithreadingexecutor
chengdol
chengdol

Reputation: 229

Java the parameters in beforeExecute() of ThreadPoolExecutor class

The parameters of beforeExecute() in ThreadPoolExecutor class are Thread and Runnable.

Sometimes we may need to override this method to satisfied our needs.

However, when I submit some callable tasks in executor. Here, in the beforeExecute() we can only get Runnable object, so I wonder if the executor convert the callable form to runnable implicitly???

I find some utility methods in Executors class, which convert Runnable to Callable, but I don't find the opposite.

Upvotes: 2

Views: 378

Answers (1)

JB Nizet
JB Nizet

Reputation: 692181

Calling submit(Callable) calls newTaskFor(), which returns a Runnable calling the Callable. And that Runnable is then passed to execute().

Upvotes: 5

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