Hystrix配置

一 配置超时时间

1 新建TimeoutCommand

package org.crazyit.cloud.config;

import com.netflix.hystrix.HystrixCommand;
import com.netflix.hystrix.HystrixCommandGroupKey;
import com.netflix.hystrix.HystrixCommandProperties;

public class TimeoutCommand extends HystrixCommand<String> {

    //设置超时时间为2秒
    public TimeoutCommand() {
        super(Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey("ExampleGroup"))
                .andCommandPropertiesDefaults(HystrixCommandProperties.Setter()
                       .withExecutionTimeoutInMilliseconds(2000)));
    }

    @Override
    protected String run() throws Exception {
        Thread.sleep(3000);
        System.out.println("执行命令");
        return "success";
    }

    @Override
    protected String getFallback() {
        System.out.println("执行回退方法");
        return "fallback";
    }
    
    
}

2 新建测试类

package org.crazyit.cloud.config;
import com.netflix.config.ConfigurationManager;
public class TimeoutMain {
      public static void main(String[] args) {
            TimeoutCommand c = new TimeoutCommand();
            String result = c.execute();
            System.out.println(result);
      }
}

3 测试结果

执行回退方法

fallback

二 全局配置

1 代码

package org.crazyit.cloud.config;

import com.netflix.config.ConfigurationManager;
import com.netflix.hystrix.HystrixCommand;
import com.netflix.hystrix.HystrixCommandGroupKey;

public class PropertyMain {

    public static void main(String[] args) {
        //全局配置
        ConfigurationManager
        .getConfigInstance()
        .setProperty(
                "hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds",
                2000);
        PropertyCommand c = new PropertyCommand();
        String result = c.execute();
        System.out.println(result);
    }

    static class PropertyCommand extends HystrixCommand<String> {
        public PropertyCommand() {
            super(Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey("ExampleGroup")));
        }

        @Override
        protected String run() throws Exception {
            Thread.sleep(3500);
            return "success";
        }

        @Override
        protected String getFallback() {
            return "fallback";
        }
        
    }
}

2 测试结果

fallback

三 配置key

package org.crazyit.cloud.config;

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

public class KeyCommand extends HystrixCommand<String> {

    public KeyCommand() {
        super(
                Setter.withGroupKey(
                        HystrixCommandGroupKey.Factory.asKey("TestGroupKey"))
                        .andCommandKey(HystrixCommandKey.Factory.asKey("CommandKey"))
                        .andThreadPoolKey(
                                HystrixThreadPoolKey.Factory.asKey("PoolKey")));
    }

    @Override
    protected String run() throws Exception {
        // TODO Auto-generated method stub
        return null;
    }

}