/**
* 指定manager,进行event调用
*/
public Object callManager(final Event event) {
CommunicationException ex = null;
Object object = null;
for (int i = index; i < index + managerAddress.size(); i++) { // 循环一次manager的所有地址
String address = managerAddress.get(i % managerAddress.size());
try {
object = delegate.call(address, event);