Method future

java/lib/src/main/java/io/github/ccxt/ws/WsClient.java:177–184

Get or create a Future for a messageHash. If a rejection was queued before the future existed, reject it immediately.

(String messageHash)

     * If a rejection was queued before the future existed, reject it immediately.
     */
    public Future future(String messageHash) {
        Future f = futuresMap().computeIfAbsent(messageHash, k -> new Future());
        Object rejection = rejectionsMap().remove(messageHash);
        if (rejection != null) {
            f.reject(rejection);
        }
        return f;
    }

    public Future reusableFuture(String messageHash) {
        return this.future(messageHash);