Method bind

src/main/java/groovy/concurrent/DataflowVariable.java:79–90

Binds this variable to the given value. Can only be called once; subsequent calls throw IllegalStateException. @param value the value to bind (may be null) @throws IllegalStateException if already bound

(T value)

     * @throws IllegalStateException if already bound
     */
    public void bind(T value) {
        if (!future.complete(value)) {
            String current;
            try {
                current = String.valueOf(future.getNow(null));
            } catch (CompletionException e) {
                current = "error: " + e.getCause();
            }
            throw new IllegalStateException(
                    "DataflowVariable is already bound to: " + current);
        }
    }

    /**
     * Binds this variable to an error. Any thread awaiting the value