67 lines
1 KiB
Go
67 lines
1 KiB
Go
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// Package services avoids having to wrap contexts so much for multiple services.
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package services
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import (
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"context"
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"sync"
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)
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type Services interface {
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Set(key, val any)
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Value(key any) any
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}
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type services struct {
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sync.RWMutex
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m map[any]any
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}
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func New() Services {
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return &services{
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m: make(map[any]any),
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}
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}
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func CtxWith(ctx context.Context, svc Services) context.Context {
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return context.WithValue(ctx, ServiceKey, svc)
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}
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func (s *services) Value(key any) any {
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s.RLock()
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defer s.RUnlock()
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return s.m[key]
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}
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func (s *services) Set(key, val any) {
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s.Lock()
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defer s.Unlock()
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s.m[key] = val
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}
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type serviceKey string
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const ServiceKey serviceKey = "service"
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func WithValue(ctx context.Context, key, val any) context.Context {
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v := ctx.Value(ServiceKey)
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if v == nil {
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return context.WithValue(ctx, key, val)
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}
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sv := v.(Services)
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sv.Set(key, val)
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return ctx
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}
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func Value(ctx context.Context, key any) any {
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sv := ctx.Value(ServiceKey)
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if sv == nil {
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return ctx.Value(key)
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}
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return sv.(Services).Value(key)
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}
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