@Override
    public void startup() throws LifeCycleException {
        super.startup();

        this.connectionEventHandler.setConnectionManager(this);
        this.connectionEventHandler.setConnectionEventListener(connectionEventListener);
        this.connectionFactory.init(connectionEventHandler);
    }
Do some preparatory work in order to refactor the ConnectionManager in the next version.

@author chengyi (mark.lx@antfin.com) 2019-03-07 14:27
src/main/java/com/alipay/remoting/DefaultClientConnectionManager.java