TopDnsServer.java

package com.cheng.zenofdesignpatterns.patternpk.behavioral.observer_vs_chain.chain;

/**
 * 全球顶级DNS服务器
 */
public class TopDnsServer extends ChainDnsServer {

	@Override
	protected Recorder echo(String domain) {
		Recorder recorder = super.echo(domain);
		recorder.setOwner("全球顶级DNS服务器");
		return recorder;
	}

	@Override
	protected boolean isLocal(String domain) {
		// 所有的域名最终的解析地点
		return true;
	}

}