Do not generate the operation registry when there are no operations

[david-perez]

Do not generate the operation registry, nor the operation handler
traits, when there are no operations in the service closure.

Testing

Without this commit, we codegen a crate for the empty.smithy service that
cannot be compiled.

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• Server Test (ignoring whitespace)

A new doc preview is ready to view.

Rust Wrk benchmark report:

Duration: 90 sec, Connections: 32, Threads: 2

Measurement	Deviation	Current	Old
Requests/sec	0.07%	38107.65	38082.48
Total requests	0.07%	3431875	3429462
Total errors	NaN%	0	0
Total successes	0.07%	3431875	3429462
Average latency ms	0.00%	0.87	0.87
Minimum latency ms	0.00%	0.02	0.02
Maximum latency ms	20.40%	20.24	16.81
Stdev latency ms	-5.26%	0.54	0.57
Transfer Mb	0.07%	356.75	356.49
Connect errors	NaN%	0	0
Read errors	NaN%	0	0
Write errors	NaN%	0	0
Status errors (not 2xx/3xx)	NaN%	0	0
Timeout errors	NaN%	0	0

[david-perez]

There's no harm in adding the test to the client too I guess.

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• Server Test (ignoring whitespace)
• No codegen difference in the Server Test Python

A new doc preview is ready to view.

Rust Wrk benchmark report:

Duration: 90 sec, Connections: 32, Threads: 2

Measurement	Deviation	Current	Old
Requests/sec	0.42%	75566.66	75248.56
Total requests	0.51%	6808491	6774032
Total errors	NaN%	0	0
Total successes	0.51%	6808491	6774032
Average latency ms	24.53%	0.66	0.53
Minimum latency ms	0.00%	0.02	0.02
Maximum latency ms	-4.51%	16.5	17.28
Stdev latency ms	26.51%	1.05	0.83
Transfer Mb	0.51%	707.75	704.16
Connect errors	NaN%	0	0
Read errors	NaN%	0	0
Write errors	NaN%	0	0
Status errors (not 2xx/3xx)	NaN%	0	0
Timeout errors	NaN%	0	0

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• Server Test (ignoring whitespace)
• No codegen difference in the Server Test Python

A new doc preview is ready to view.

Rust Wrk benchmark report:

Duration: 90 sec, Connections: 32, Threads: 2

Measurement	Deviation	Current	Old
Requests/sec	2.57%	42096.49	41042.44
Total requests	2.57%	3789133	3694094
Total errors	NaN%	0	0
Total successes	2.57%	3789133	3694094
Average latency ms	3.75%	0.83	0.8
Minimum latency ms	0.00%	0.02	0.02
Maximum latency ms	-17.00%	16.65	20.06
Stdev latency ms	30.19%	0.69	0.53
Transfer Mb	2.57%	393.88	384
Connect errors	NaN%	0	0
Read errors	NaN%	0	0
Write errors	NaN%	0	0
Status errors (not 2xx/3xx)	NaN%	0	0
Timeout errors	NaN%	0	0

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• Server Test (ignoring whitespace)
• No codegen difference in the Server Test Python

A new doc preview is ready to view.

Rust Wrk benchmark report:

Duration: 90 sec, Connections: 32, Threads: 2

Measurement	Deviation	Current	Old
Requests/sec	-0.20%	61642.87	61763.33
Total requests	-0.25%	5550714	5564351
Total errors	NaN%	0	0
Total successes	-0.25%	5550714	5564351
Average latency ms	-1.64%	0.6	0.61
Minimum latency ms	0.00%	0.02	0.02
Maximum latency ms	7.25%	17.76	16.56
Stdev latency ms	1.45%	0.7	0.69
Transfer Mb	-0.25%	577	578.42
Connect errors	NaN%	0	0
Read errors	NaN%	0	0
Write errors	NaN%	0	0
Status errors (not 2xx/3xx)	NaN%	0	0
Timeout errors	NaN%	0	0

[github-actions]

A new generated diff is ready to view.

• AWS SDK (ignoring whitespace)
• Server Test (ignoring whitespace)
• No codegen difference in the Server Test Python

A new doc preview is ready to view.

[rcoh]

LGTM

[rcoh]

let's make this fail

[david-perez]

I'll work on making it throw an exception instead of logging a warning.

[LukeMathWalker]

I assume we can close this since the registry is gone? @david-perez

[hlbarber]

Closed in favor of #2351