public AsyncManager(int maxStage, AsyncExecutor executor, Engine server) {
this.executor = executor;
this.engine = server;
this.maxStage = maxStage;
executor.setManager(this);
registerWithScheduler(((SpoutEngine) server).getScheduler());
}
public AsyncManager(int maxStage, AsyncExecutor executor) {
this.executor = executor;
engine = null;
this.maxStage = maxStage;
executor.setManager(this);
}