64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
package broker
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import (
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"context"
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)
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type brokerKey struct{}
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// FromContext returns broker from passed context
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func FromContext(ctx context.Context) (Broker, bool) {
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if ctx == nil {
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return nil, false
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}
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c, ok := ctx.Value(brokerKey{}).(Broker)
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return c, ok
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}
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// MustContext returns broker from passed context
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func MustContext(ctx context.Context) Broker {
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b, ok := FromContext(ctx)
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if !ok {
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panic("missing broker")
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}
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return b
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}
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// NewContext savess broker in context
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func NewContext(ctx context.Context, s Broker) context.Context {
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if ctx == nil {
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ctx = context.Background()
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}
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return context.WithValue(ctx, brokerKey{}, s)
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}
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// SetSubscribeOption returns a function to setup a context with given value
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func SetSubscribeOption(k, v interface{}) SubscribeOption {
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return func(o *SubscribeOptions) {
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if o.Context == nil {
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o.Context = context.Background()
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}
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o.Context = context.WithValue(o.Context, k, v)
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}
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}
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// SetPublishOption returns a function to setup a context with given value
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func SetPublishOption(k, v interface{}) PublishOption {
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return func(o *PublishOptions) {
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if o.Context == nil {
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o.Context = context.Background()
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}
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o.Context = context.WithValue(o.Context, k, v)
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}
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}
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// SetOption returns a function to setup a context with given value
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func SetOption(k, v interface{}) Option {
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return func(o *Options) {
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if o.Context == nil {
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o.Context = context.Background()
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}
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o.Context = context.WithValue(o.Context, k, v)
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}
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}
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