The SignalService is the entry point for signal processing. It provides operations to

• add API SignalListener
• remove API SignalListener
• throw API Signal

You can get the SignalService from the API ProcessEngine or through the static locator like this

    SignalService sigService = SignalService.locateSignalService();

A API Signal is one of the few objects that the API provides directly. You would create a and throw a API Signal like this

    Signal signal = new Signal(getID(), SignalType.USER_SIGNAL, "Hello");
    sigService.throwSignal(signal);