Interface Heartbeat

  • All Known Implementing Classes:

    public interface Heartbeat
    Allows for deferred execution of logic, useful when trying to get multiple components to coordinate behavior. A component may add a command to be executed "at the end of the heartbeat". The classic example of this is a Label and the field it labels; since we don't know which order the two will render, we can't tell if the field's id is correct until after both have rendered. The Heartbeat is injected into components via the Environmental annotation.
    • Method Detail

      • begin

        void begin()
        Begins a new Heartbeat. Heartbeats nest. Every call to begin() should be matched by a call to end().
      • end

        void end()
        Executes all commands since the most recent begin().
      • defer

        void defer​(Runnable command)
        Adds a new command to the current Heartbeat. The command will be executed by end().
        command - command to be executed at the end of the heartbeat
        See Also: