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Review comment: make a large-ish dropping buffer for JS listen! consumers.

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This commit is contained in:
Nick Alexander 2016-10-13 14:28:23 -07:00
parent 032bfafec2
commit a4dd7e4e9c
1 changed files with 8 additions and 4 deletions
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12
src/common/datomish/transact.cljc
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@ -648,8 +648,9 @@
(a/tap (:listener-mult conn) listener-sink)
listener-sink)
(defn- -listen-chan [f]
(let [c (a/chan (a/sliding-buffer 10))]
(defn- -listen-chan
[f n]
(let [c (a/chan (a/dropping-buffer n))]
(go-loop []
(when-let [v (<! c)]
(do
@ -664,8 +665,11 @@
Returns the channel listened to, for future calls to `unlisten-chan!`."
([conn f]
{:pre [(fn? f)]}
(listen-chan! conn (-listen-chan f))))
;; Decently large buffer before dropping, for JS consumers.
(listen! conn f 1024))
([conn f n]
{:pre [(fn? f) (pos? n)]}
(listen-chan! conn (-listen-chan f n))))
(defn unlisten-chan! [conn listener-sink]
"Stop putting reports successfully transacted against the given connection onto the given channel."