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| author | Felix Lange <fjl@twurst.com> | 2016-04-16 00:05:24 +0800 |
|---|---|---|
| committer | Felix Lange <fjl@twurst.com> | 2016-04-16 00:10:52 +0800 |
| commit | a40e61b4ac44a4f64f057a4220a26cfe4b9dcf03 (patch) | |
| tree | 401218a5f3ed5b4fac88baf87551bd3f57f3c34b /rpc/notification.go | |
| parent | 6197fbf8d70c1aa96c3e87de91ff3f46f454c1ea (diff) | |
| download | go-tangerine-a40e61b4ac44a4f64f057a4220a26cfe4b9dcf03.tar.gz go-tangerine-a40e61b4ac44a4f64f057a4220a26cfe4b9dcf03.tar.zst go-tangerine-a40e61b4ac44a4f64f057a4220a26cfe4b9dcf03.zip | |
rpc: remove NotifierContextKey
Context keys must have a unique type in order to prevent
any unintented clashes. The code used int(1) as key.
Fix it by implementing the pattern recommended by package context.
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 |