Hystrix研究-熔断例子

最新推荐文章于 2025-06-24 23:16:30 发布

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最新推荐文章于 2025-06-24 23:16:30 发布 · 654 阅读

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#Hystrix

1、熔断例子

import java.util.concurrent.TimeUnit;

import com.netflix.hystrix.HystrixCommand;
import com.netflix.hystrix.HystrixCommandGroupKey;
import com.netflix.hystrix.HystrixCommandKey;
import com.netflix.hystrix.HystrixCommandProperties;
import com.netflix.hystrix.HystrixThreadPoolKey;
import com.netflix.hystrix.HystrixThreadPoolProperties;

/**
 * 测试4-熔断测试
 *
 */
public class CommandHelloWorld5 extends HystrixCommand<String>{
	private Integer id;
	
	public CommandHelloWorld5(Integer id) {
		super(setter());
		this.id = id;
	}
	
	private static Setter setter() {
		return ApiSetter.setter("getNum");
				
	}

	@Override
	protected String run() throws Exception {
		System.out.print("id:" + id);
		if (id % 2 == 0 && id <= 10) { //让小于等于10的偶数返回
			return "running run():" + id;
		} else { //让奇数或大于10的数进入fallback
			TimeUnit.MILLISECONDS.sleep(200);
			return  " XXX ";
		}
	}
	
	@Override
	protected String getFallback() {
		return " ====== CircuitBreaker fallback" + id + " ,是否进入熔断:" + super.isCircuitBreakerOpen();
	}
	
	public static void main(String[] args) throws Exception {
		for(int i = 0; i < 30; i++) {
			System.out.println(new CommandHelloWorld5(i).execute());
//			/*Future<String> future =  new CommandHelloWorld5(i).queue();
//        	System.out.println(future.get());*/
    	}
	}
	
	private static class ApiSetter {

		/**
		 *
		 * @param commandKeyName 服务标识名称
		 * @param threadPoolKeyName 线程程名称
		 * @return
		 */
	    public static Setter setter(