hystrix参数使用方法
通过注解@hystrixcommand的commandproperties去配置，
如下就是hystrix命令超时时间命令执行超时时间，为1000ms和执行是不启用超时
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@restcontroller
public class moviecontroller {
@autowired
private resttemplate resttemplate;
@getmapping("/movie/{id}")
@hystrixcommand(commandproperties = {
@hystrixproperty(name = "execution.isolation.thread.timeoutinmilliseconds", value = "1000"),
@hystrixproperty(name = "execution.timeout.enabled", value = "false")},fallbackmethod = "findbyidfallback")
public user findbyid(@pathvariable long id) {
return this.resttemplate.getforobject("http://microservice-provider-user/simple/" + id, user.class);
}
/**
* fallback方法
* @param id
* @return
*/
public user findbyidfallback(long id) {
user user = new user();
user.setid(5l);
return user;
}
}
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问题描述：
笔者在使用spring boot 2.0整合spring cloud finchley.rc2版本时，使用断路器 hystrix时候发现@hystrixcommand注解找不到，由于spring boot 2.0刚出没多久，所以这块资料网上很少，查阅资料说是新版本中不包含此注解了，需要重新引入。
报错信息：
源码：
解决方案：pom.xml添加依赖
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<dependency>
<groupid>com.netflix.hystrix</groupid>
<artifactid>hystrix-javanica</artifactid>
<version>release</version>
</dependency>
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完整pom.xml
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<?xml version="1.0" encoding="utf-8"?>
<project xmlns="http://maven.apache.org/pom/4.0.0" xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
xsi:schemalocation="http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelversion>4.0.0</modelversion>
<groupid>com.serverribbon</groupid>
<artifactid>serverribbon</artifactid>
<version>0.0.1-snapshot</version>
<packaging>jar</packaging>
<name>serverribbon</name>
<description>demo project for spring boot</description>
<parent>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-parent</artifactid>
<version>2.0.2.release</version>
<relativepath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceencoding>utf-</project.build.sourceencoding>
<project.reporting.outputencoding>utf-</project.reporting.outputencoding>
<java.version>1.8</java.version>
<spring-cloud.version>finchley.rc2</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupid>org.springframework.cloud</groupid>
<artifactid>spring-cloud-starter-netflix-eureka-server</artifactid>
</dependency>
<dependency>
<groupid>org.springframework.cloud</groupid>
<artifactid>spring-cloud-starter-ribbon</artifactid>
</dependency>
<dependency>
<groupid>org.springframework.cloud</groupid>
<artifactid>spring-cloud-starter-hystrix</artifactid>
</dependency>
<dependency>
<groupid>com.netflix.hystrix</groupid>
<artifactid>hystrix-javanica</artifactid>
<version>release</version>
</dependency>
<dependency>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-starter-test</artifactid>
<scope>test</scope>
</dependency>
<dependency>
<groupid>com.netflix.hystrix</groupid>
<artifactid>hystrix-core</artifactid>
<version>release</version>
</dependency>
<dependency>
<groupid>com.netflix.hystrix</groupid>
<artifactid>hystrix-core</artifactid>
<version>release</version>
</dependency>
</dependencies>
<dependencymanagement>
<dependencies>
<dependency>
<groupid>org.springframework.cloud</groupid>
<artifactid>spring-cloud-dependencies</artifactid>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencymanagement>
<build>
<plugins>
<plugin>
<groupid>org.springframework.boot</groupid>
<artifactid>spring-boot-maven-plugin</artifactid>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-milestones</id>
<name>spring milestones</name>
<url>https://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
</project>
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在程序的启动类serviceribbonapplication 加@enablehystrix注解开启hystrix
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/zjh_746140129/article/details/80697921