Collector 0.2.0

[pauljohanneskraft]

Collector 0.2.0

♻️ Current situation

There is no way to only collect metrics or traces. You always get both features at once without the choice of one.

Dependencies should only be part of a framework, if they are essential to them - which is not the case for NIO in MetricCollector.

There is no way of injecting/extracting context from a Foundation URLRequest.

💡 Proposed solution

Separate Collector into MetricCollector and TraceCollector with only relevant dependencies between the two. Collector is still a package that can be imported (essentially MetricCollector + TraceCollector).

Remove direct dependency on NIO for MetricCollector. We still have it in the list through SwiftPrometheus though.

Add Context Propagation for URLRequest right in the main repository.

Implications

Minor interface changes from NIO to async/await.

Testing

There are no tests so far.

Reviewer Nudging

The changes are actually quite minor, so you should be able to skim over all of them.

[PSchmiedmayer]

@pauljohanneskraft Thanks for the improvements to Collector!
I have changed the GitHub Action to use the latest Xcode beta (13.2) to get the tests running It supports building and testing Swift Concurrency features for older os versions. There are still some issues as listed in Apodini/Apodini#374 but that doesn't affect this PR as you don't use any Swift Concurrency features in the test targets. So changing xcode-version: latest-stable to xcode-version: latest in the regular builds should be fine for new.

[codecov]

Codecov Report

Merging #1 (41648c2) into develop (868eac8) will decrease coverage by 0.63%.
The diff coverage is 6.45%.

@@            Coverage Diff             @@
##           develop      #1      +/-   ##
==========================================
- Coverage     1.23%   0.60%   -0.64%     
==========================================
  Files           10      17       +7     
  Lines          162     666     +504     
==========================================
+ Hits             2       4       +2     
- Misses         160     662     +502     

Impacted Files	Coverage Δ
Sources/JaegerCollector/Sender/JaegerSender.swift	0.00% <0.00%> (ø)
Sources/MetricCollector/Metric.swift	0.00% <ø> (ø)
...ources/PrometheusCollector/Metric+Prometheus.swift	0.00% <0.00%> (ø)
Sources/TraceCollector/Agent/BasicAgent.swift	0.00% <0.00%> (ø)
.../TraceCollector/ContextPropagation/Extractor.swift	0.00% <ø> (ø)
...s/TraceCollector/ContextPropagation/Injector.swift	0.00% <ø> (ø)
...lector/ContextPropagation/URLRequest+Context.swift	0.00% <0.00%> (ø)
Sources/TraceCollector/Span/Span.swift	0.00% <ø> (ø)
Sources/TraceCollector/Span/Tag.swift	0.00% <ø> (ø)
Sources/TraceCollector/Tracer/BasicTracer.swift	0.00% <ø> (ø)
... and 9 more

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[PSchmiedmayer]

@pauljohanneskraft You also have the permissions to merge the PR despite the SwiftLint warnings and CodeCov reports once you feel the PR is ready. All important builds seem to pass now 🚀