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Demonstrate OpenTelemetry attribute.Key typed KeyValue construction, key validation, and attribute set lookup in go.opentelemetry.io/otel.

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CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17

목표: Demonstrate OpenTelemetry attribute.Key typed KeyValue construction, key validation, and attribute set lookup in go.opentelemetry.io/otel. HOW
패키지: go.opentelemetry.io/otel 1.35.0
환경: go
생성일: 2026-08-17T23:32:36Z

attribute.Key provides typed constructors like Int and String that return KeyValue pairs, where Int maps Go int to INT64 Value type and empty keys produce invalid KeyValue pairs.
key.Defined() returns true for non-empty keys and false for empty keys
key.Int(200) constructs a KeyValue with Value.Type() equal to attribute.INT64 and AsInt64() equal to 200
key.String("GET") constructs a KeyValue with Value.Type() equal to attribute.STRING and AsString() equal to "GET"
emptyKey.String("value").Valid() evaluates to false because emptyKey is not defined
key.IntSlice([]int{100, 200, 300}) constructs a KeyValue with INT64SLICE Value type
attribute.NewSet with KeyValue pairs allows key lookup via set.HasValue(key) and set.Value(key)

go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9