message broker about ws-event demo q1: http://wso2.org/library/knowledge-base/2012/06/publishing-messages-message-broker-using-event-mediator
how a client call proxyservice
q2: Event Sink URL target service demo
message broker about ws-event demo q1: http://wso2.org/library/knowledge-base/2012/06/publishing-messages-message-broker-using-event-mediator
how a client call proxyservice
q2: Event Sink URL target service demo
Q1 : You can use soap UI to call a proxy service. For that you can get the endpoint url from the service listing page in ESB. I think this will be helpful to you.
Q2 : Not clear on the question.