diff options
Diffstat (limited to 'rpc/notification.go')
| -rw-r--r-- | rpc/notification.go | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/rpc/notification.go b/rpc/notification.go index 146d785c9..e84e26a58 100644 --- a/rpc/notification.go +++ b/rpc/notification.go @@ -23,6 +23,7 @@ import ( "github.com/ethereum/go-ethereum/logger" "github.com/ethereum/go-ethereum/logger/glog" + "golang.org/x/net/context" ) var ( @@ -62,6 +63,14 @@ type Notifier interface { Unsubscribe(id string) error } +type notifierKey struct{} + +// NotifierFromContext returns the Notifier value stored in ctx, if any. +func NotifierFromContext(ctx context.Context) (Notifier, bool) { + n, ok := ctx.Value(notifierKey{}).(Notifier) + return n, ok +} + // Subscription defines the interface for objects that can notify subscribers type Subscription interface { // Inform client of an event |