What happens to Binder when a component exits?

Justin Mattson

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Oct 10, 2022, 9:50:58 AM10/10/22

to component-framework-dev

If a child exposes Binder from framework, does that close when the component exits? Does anyone know off hand? It isn't very important to know this so please don't bother rummaging around in the code if the answer doesn't happen to come to you immediately.

Cheers,

Justin

How am I doing? (anonymous feedback)

Gary Bressler

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Oct 10, 2022, 12:21:03 PM10/10/22

to Justin Mattson, component-framework-dev

It's supposed to, yes.

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Rich Kadel

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Oct 10, 2022, 1:08:18 PM10/10/22

to Gary Bressler, Justin Mattson, component-framework-dev

Notably, it didn't work for me in the way I expected.

When I was trying to update ElementManager for CFv2, to trigger an action when a component exits (specifically, terminal, when the user types `exit` and the terminal process exits), I tried to catch a PEER_CLOSED signal on Binder, but it didn't work.

However, when I changed the code to trigger actions when catching a PEER_CLOSED signal on the ViewController, that did work.

So I don't know what that means. Perhaps Binder does not stay open after it's used to start a component. Or maybe ElementManager dropped it earlier than I expected. (I didn't think so, but maybe I missed something.)

Just be aware that there is at least anecdotal evidence it might not be useful in the way one might expect.

Rich

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Gary Bressler

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Oct 10, 2022, 2:02:32 PM10/10/22

to Rich Kadel, Justin Mattson, component-framework-dev

Could you file a bug for this?

If you connected to `Binder` after the component exited, that would be a scenario in which you would miss the PEER_CLOSED. Otherwise, it should work like any other capability.

(Although listening to ViewController might actually be a better choice in this situation)

Adam Perry

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Oct 10, 2022, 2:06:47 PM10/10/22

to Gary Bressler, Rich Kadel, Justin Mattson, component-framework-dev

Do we have a test for the PEER_CLOSED behavior?

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