public void start() {
if (this.isStarted()) return;
super.start();
if (this.context.getObject(this.name) != null)
throw (new IllegalArgumentException(
String.format("duplicate object name found `%s`", this.name)));
this.context.putObject(this.name, this);
}
public void stop() {
if (!this.isStarted()) return;
this.context.putObject(this.name, null);
super.stop();
}