目錄
Pom
應(yīng)用啟動類
接口
服務(wù)提供者
消費者
總結(jié)
因為jar包沖突問題報錯?java.lang.NoSuchMethodError: org.springframework.boot.builder.SpringApplicationBuilder.([Ljava/lang/Object;)V
解決方式修改低版本springboot
改成如下
版本對照
全代碼
pom
啟動
實現(xiàn)
yml
Pom
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
<version>1.4.4.RELEASE</version>
</dependency>
應(yīng)用啟動類
@SpringBootApplication
@EnableHystrix
public class ProviderApplication {
有需要加上這個
@EnableDubbo(scanBasePackages = {"org.apache.dubbo.spring.boot.provider.impl"})
接口
package org.apache.dubbo.spring.boot.api;
public interface HelloService {
String sayHello(String name);
}
服務(wù)提供者
@Service(version = "1.0.0")
public class HelloServiceImpl implements HelloService {
@HystrixCommand(commandProperties = {
@HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),
@HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "2000") })
@Override
public String sayHello(String name) {
// System.out.println("async provider received: " + name);
// return "annotation: hello, " + name;
throw new RuntimeException("Exception to show hystrix enabled.");
}
}
消費者
有超時熔斷跳轉(zhuǎn)到 reliable 方法
@Reference(version = "1.0.0")
private HelloService demoService;
@HystrixCommand(fallbackMethod = "reliable")
public String doSayHello(String name) {
return demoService.sayHello(name);
}
public String reliable(String name) {
return "hystrix fallback value";
}
總結(jié)
- 對于dubbo provider的
@Service是一個spring bean，直接在上面配置@HystrixCommand即可 - 對于dubbo consumer的
@Reference，可以通過加一層簡單的spring method包裝，配置@HystrixCommand即可 - Hystrix本身提供
HystrixCommandAspect來集成Spring AOP，配置了@HystrixCommand和@HystrixCollapser的spring method都會被Hystrix處理
ok
持續(xù)更新文章來源地址http://www.zghlxwxcb.cn/news/detail-520977.html
因為jar包沖突問題報錯?java.lang.NoSuchMethodError: org.springframework.boot.builder.SpringApplicationBuilder.<init>([Ljava/lang/Object;)V
16:46:41.593 [main] DEBUG org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter - Application failed to start due to an exception
java.lang.NoSuchMethodError: org.springframework.boot.builder.SpringApplicationBuilder.<init>([Ljava/lang/Object;)V
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:161)
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:102)
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:68)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:131)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:85)
at org.springframework.boot.SpringApplicationRunListeners.lambda$environmentPrepared$2(SpringApplicationRunListeners.java:66)
at java.util.ArrayList.forEach(ArrayList.java:1249)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120)
at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:114)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:65)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:343)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:301)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292)
at com.example.demo.DemoApplication.main(DemoApplication.java:15)
16:46:41.599 [main] ERROR org.springframework.boot.diagnostics.LoggingFailureAnalysisReporter -
***************************
APPLICATION FAILED TO START
***************************
Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location:
org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:161)
The following method did not exist:
org.springframework.boot.builder.SpringApplicationBuilder.<init>([Ljava/lang/Object;)V
The calling method's class, org.springframework.cloud.bootstrap.BootstrapApplicationListener, was loaded from the following location:
jar:file:/C:/Users/ext.jianghaoyu1/.m2/repository/org/springframework/cloud/spring-cloud-context/1.3.6.RELEASE/spring-cloud-context-1.3.6.RELEASE.jar!/org/springframework/cloud/bootstrap/BootstrapApplicationListener.class
The called method's class, org.springframework.boot.builder.SpringApplicationBuilder, is available from the following locations:
jar:file:/C:/Users/ext.jianghaoyu1/.m2/repository/org/springframework/boot/spring-boot/2.7.10/spring-boot-2.7.10.jar!/org/springframework/boot/builder/SpringApplicationBuilder.class
The called method's class hierarchy was loaded from the following locations:
org.springframework.boot.builder.SpringApplicationBuilder: file:/C:/Users/ext.jianghaoyu1/.m2/repository/org/springframework/boot/spring-boot/2.7.10/spring-boot-2.7.10.jar
Action:
Correct the classpath of your application so that it contains compatible versions of the classes org.springframework.cloud.bootstrap.BootstrapApplicationListener and org.springframework.boot.builder.SpringApplicationBuilder
進程已結(jié)束,退出代碼1
解決方式修改低版本springboot
<parent>
? ? <groupId>org.springframework.boot</groupId>
? ? <artifactId>spring-boot-starter-parent</artifactId>
? ? <version>2.0.0.RELEASE</version>
? ? <relativePath/> <!-- lookup parent from repository -->
</parent>改成如下
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>版本對照
ok
持續(xù)更新
全代碼
pom
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo-p</name>
<description>Demo project for Apache Dubbo</description>
<properties>
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<dubbo.version>3.1.8</dubbo.version>
<spring-boot.version>1.5.3.RELEASE</spring-boot.version>
<hystrix-starter.version>1.4.7.RELEASE</hystrix-starter.version>
</properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-bom</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<version>${dubbo.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-dependencies-zookeeper</artifactId>
<type>pom</type>
</dependency>
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
<version>${hystrix-starter.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>${spring-boot.version}</version>
</plugin>
</plugins>
</build>
</project>
啟動
package com.example.demo;
import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.hystrix.EnableHystrix;
@SpringBootApplication
@EnableDubbo
@EnableHystrix
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
實現(xiàn)
package com.example.demo.dubbo.service;
import com.example.demo.dubbo.api.DemoService;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.apache.dubbo.config.annotation.DubboService;
@DubboService
public class DemoServiceImpl implements DemoService {
@HystrixCommand(commandProperties = {
@HystrixProperty(name = "circuitBreaker.requestVolumeThreshold", value = "10"),
@HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "2000")
})
@Override
public String sayHello(String name) {
return "Hello " + name;
}
}yml
server:
port: 8101
dubbo:
application:
name: dubbo-springBoot-demo-provider
protocol:
name: dubbo
port: -1
registry:
address: zookeeper://localhost:2181
management:
endpoints:
web:
exposure:
include: "*"
metrics:
tags:
application: ${spring.application.name}
ok文章來源：http://www.zghlxwxcb.cn/news/detail-520977.html
持續(xù)更新
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