docs: public void openStream() throws IOException {
          socket = new Socket(host, port);
          socketStream = socket.getOutputStream();
          if (null != context.get("name") && null != context.get("id")) {
              Object group = context.get("group");
              String desc = (null != group ? group + "/" : "") + context.get("name");
              write("Job started: " + desc + ": " + context.get("id"));
          }
          write("Execution: " + context.get("execid"));
      }