Method doCall

src/Deferred.java:1276–1290

Executes a single callback, handling continuation if it returns a Deferred. @param cb The callback to execute. @return true if the callback returned a Deferred and we switched to PAUSED, false otherwise and we didn't change state.

(final Callback cb)

   * PAUSED, {@code false} otherwise and we didn't change state.
   */
  @SuppressWarnings("unchecked")
  private boolean doCall(final Callback cb) {
    try {
      //LOG.debug("doCall(" + cb + '@' + cb.hashCode() + ')' + super.hashCode());
      result = cb.call(result);
    } catch (Exception e) {
      result = e;
    }

    if (result instanceof Deferred) {
      handleContinuation((Deferred) result, cb);
      return true;
    }
    return false;
  }

  /**
   * Chains this Deferred with another one we need to wait on.