alexandre-normand/slackscot

package slackscot

// DO NOT EDIT!
// This code is generated with http://github.com/hexdigest/gowrap tool
// using opentelemetry.template template

//go:generate gowrap gen -p github.com/alexandre-normand/slackscot -i UserInfoFinder -t opentelemetry.template -o userinfofindermetrics.go

import (
    "context"
    "time"
    "unicode"

    "github.com/slack-go/slack"
    "go.opentelemetry.io/otel/label"
    "go.opentelemetry.io/otel/metric"
)

// UserInfoFinderWithTelemetry implements UserInfoFinder interface with all methods wrapped
// with open telemetry metrics
type UserInfoFinderWithTelemetry struct {
    base                     UserInfoFinder
    methodCounters           map[string]metric.BoundInt64Counter
    errCounters              map[string]metric.BoundInt64Counter
    methodTimeValueRecorders map[string]metric.BoundInt64ValueRecorder
}

// NewUserInfoFinderWithTelemetry returns an instance of the UserInfoFinder decorated with open telemetry timing and count metrics
func NewUserInfoFinderWithTelemetry(base UserInfoFinder, name string, meter metric.Meter) UserInfoFinderWithTelemetry {
    return UserInfoFinderWithTelemetry{
        base:                     base,
        methodCounters:           newUserInfoFinderMethodCounters("Calls", name, meter),
        errCounters:              newUserInfoFinderMethodCounters("Errors", name, meter),
        methodTimeValueRecorders: newUserInfoFinderMethodTimeValueRecorders(name, meter),
    }
}

func newUserInfoFinderMethodTimeValueRecorders(appName string, meter metric.Meter) (boundTimeValueRecorders map[string]metric.BoundInt64ValueRecorder) {
    boundTimeValueRecorders = make(map[string]metric.BoundInt64ValueRecorder)
    mt := metric.Must(meter)

    nGetUserInfoValRecorder := []rune("UserInfoFinder_GetUserInfo_ProcessingTimeMillis")
    nGetUserInfoValRecorder[0] = unicode.ToLower(nGetUserInfoValRecorder[0])
    mGetUserInfo := mt.NewInt64ValueRecorder(string(nGetUserInfoValRecorder))
    boundTimeValueRecorders["GetUserInfo"] = mGetUserInfo.Bind(label.String("name", appName))

    return boundTimeValueRecorders
}

func newUserInfoFinderMethodCounters(suffix string, appName string, meter metric.Meter) (boundCounters map[string]metric.BoundInt64Counter) {
    boundCounters = make(map[string]metric.BoundInt64Counter)
    mt := metric.Must(meter)

    nGetUserInfoCounter := []rune("UserInfoFinder_GetUserInfo_" + suffix)
    nGetUserInfoCounter[0] = unicode.ToLower(nGetUserInfoCounter[0])
    cGetUserInfo := mt.NewInt64Counter(string(nGetUserInfoCounter))
    boundCounters["GetUserInfo"] = cGetUserInfo.Bind(label.String("name", appName))

    return boundCounters
}

// GetUserInfo implements UserInfoFinder
func (_d UserInfoFinderWithTelemetry) GetUserInfo(userID string) (user *slack.User, err error) {
    _since := time.Now()
    defer func() {
        if err != nil {
            errCounter := _d.errCounters["GetUserInfo"]
            errCounter.Add(context.Background(), 1)
        }

        methodCounter := _d.methodCounters["GetUserInfo"]
        methodCounter.Add(context.Background(), 1)

        methodTimeMeasure := _d.methodTimeValueRecorders["GetUserInfo"]
        methodTimeMeasure.Record(context.Background(), time.Since(_since).Milliseconds())
    }()
    return _d.base.GetUserInfo(userID)
}