in aserver support message.call_async

[swmy-coder]

Hi all:
Now in aserver which use sdbusplus::async::context, how to support to get reply for message.call_async? Thanks

[williamspatrick]

Your question isn't super clear; hopefully I'm answering the right question.

You should use the sdbusplus::async::proxy class to create a "proxy" object representing the remote instance you are trying to interact with. You can then use .call on the proxy to make an async method call. This is an example of doing that:

sdbusplus/example/coroutine-example.cpp

Line 19 in f7d06e9

co_await systemd.call<ret_type>(ctx, "ListUnitFiles"))

Better yet is if you are interacting with interfaces which have an sdbusplus-YAML representation (such as those in phosphor-dbus-interfaces). The generator will make a type-safe client binding for you that you can call. In that case, the functions are named based on the dbus method name.

sdbusplus/example/calculator-client.cpp

Line 24 in f7d06e9

auto _ = co_await c.multiply(7, 6);

[swmy-coder]

HI williamspatrick :
Thanks for your reply
My question is i need to call mulitple dbus method, and need these dbus method‘s execution is parallel.
sdbusplus::async::proxy is good to call one dbus method async, but it cannot apply to multiply dbus call async.
So i plan to call dbus method async multiply like message.call_async in sdbusplus::async::context, and do work in the callback. but in sdbusplus::async::context the callback cannot be called.

[williamspatrick]

You can spawn the coroutine into the context. If you want to spawn multiple and then wait for them to complete, you can spawn them into an async_scope.

[swmy-coder]

Thanks~, It's worked