bootstrap/src/main/java/io/airlift/bootstrap/LifeCycleManager.java
public void addInstance(Object instance)
            throws Exception
    {
        State currentState = state.get();
        if ((currentState == State.STOPPING) || (currentState == State.STOPPED)) {
            throw new IllegalStateException();
        }
        else {
            startInstance(instance);
            if (methodsMap.get(instance.getClass()).hasFor(PreDestroy.class)) {
                managedInstances.add(instance);
            }
        }
    }
public void addInstance(Object instance)
            throws Exception
    {
        State currentState = state.get();
        if ((currentState == State.STOPPING) || (currentState == State.STOPPED)) {
            throw new IllegalStateException();
        }
        else {
            startInstance(instance);
            if (methodsMap.get(instance.getClass()).hasFor(PreDestroy.class)) {
                managedInstances.add(instance);
            }
        }
    }
Add an additional managed instance

@param instance instance to add
@throws Exception errors