Request fails with DEADLINE_EXCEEDED

[michaelbausor]

I have created an example using the vision API here: https://github.com/michaelbausor/gapic-generator-cpp/tree/examples/examples/vision

I would expect the example to succeed - instead it fails with DEADLINE_EXCEEDED.

Steps to reproduce:

• Checkout the example linked above (the examples branch of https://github.com/michaelbausor/gapic-generator-cpp).
• cd examples/vision
• bazel run :vision_gapic_helloworld

Note that you will need to have the GOOGLE_APPLICATION_CREDENTIALS environment variable set.

[software-dov]

Root cause in the above example:

1. The service url is not being set correctly but is instead set to the empty string.
2. The default rpc timeout durations are too small.

Correcting these in the generator allows the example to succeed. A general fix will be inbound momentarily.

[software-dov]

Clarification addendum: the vision proto file does not define the default host; the host is currently defined in the gapic yaml. Changing this is outside the scope of the gapic generator but will be addressed via proto annotation.
The gapic stub factory function does need a variant with a 'host' parameter for other reasons. This is in the scope of the generator and is the target of the aforementioned inbound fix.