We built some activities with Go, like sending mail and short message. We wonder how a java-based workflow can cooperate those activities? Both workflow and activity are registered by worker, which is realized by specific language, and run with dedicated taks-queue. So there is no way to reuse activities at code level. Please correct me if any wrong.
Can one signal with start a new workflow from activity, and wait for this child workflow signal back, then workflow continue as following?