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Posted to notifications@dubbo.apache.org by "beiwei30 (GitHub)" <gi...@apache.org> on 2018/10/29 09:53:35 UTC
[GitHub] [incubator-dubbo] beiwei30 commented on issue #2664: dubbo hystrix熔断集成问题，达不到熔断或降级的效果
1. consumer
```xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
<dubbo:application name="consumer"/>
<!-- 使用multicast广播注册中心暴露服务地址 -->
<dubbo:registry address="zookeeper://127.0.0.1:2181"/>
<!-- 生成远程服务代理，可以和本地bean一样使用demoService -->
<dubbo:reference id="echoService" interface="com.test.dubbo.service.EchoService" check="false" retries="0">
</dubbo:reference>
</beans>
```
2. provider
```xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
xsi:schemaLocation="http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- 提供方应用信息，用于计算依赖关系 -->
<dubbo:application name="provider"/>
<!-- 和本地bean一样实现服务 -->
<bean id="echoService" class="com.test.dubbo.service.EchoServiceImpl"/>
<!-- 使用multicast广播注册中心暴露服务地址 -->
<dubbo:registry address="zookeeper://127.0.0.1:2181"/>
<!-- 用dubbo协议在20880端口暴露服务 -->
<dubbo:protocol name="dubbo" port="20880"/>
<!-- 声明需要暴露的服务接口 -->
<dubbo:service interface="com.test.dubbo.service.EchoService" ref="echoService" retries="0" >
</dubbo:service>
</beans>
```
3. pom.xml
```xml
<!-- hystrix -->
<dependency>
<groupId>com.netflix.hystrix</groupId>
<artifactId>hystrix-core</artifactId>
<version>1.5.9</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<version>2.5.3</version>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
<version>0.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.24</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.24</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
<version>3.21.0-GA</version>
</dependency>
<dependency>
<groupId>io.netty</groupId>
<artifactId>netty</artifactId>
<version>3.6.10.Final</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
```
4. User
```java
package com.test.dubbo.service;
import java.io.Serializable;
public class User implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
private int id;
private String username;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
```
5. EchoService
```java
package com.test.dubbo.service;
public interface EchoService {
String sayHello();
String echoWithTimeOut();
String echoWithException();
String sayHi();
User getUser(int id);
}
```
6. EchoServiceImpl
```java
package com.test.dubbo.service;
import java.util.Iterator;
import java.util.concurrent.TimeUnit;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
public class EchoServiceImpl implements EchoService {
public String sayHello() {
System.out.println("test");
return "Hello World";
}
public String echoWithTimeOut() {
try {
for (int i = 1; i < 10; i++) {
System.out.println("i==" + i);
TimeUnit.SECONDS.sleep(i);
}
// Thread.sleep(10);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("11111111...echoWithTimeOut");
return "Hello World";
}
public String echoWithException() {
System.out.println(String.format("%s", 10 / 0));
System.out.println("2222222222.......echoWithException");
return String.format("%s", 10 / 0);
}
public String sayHi() {
String str = "Hi........DemoFallback!";
System.out.println("-----------------" + str);
return str;
}
public User getUser(int id) {
System.out.println("getUser");
System.out.println(String.format("%s", 10 / 0));
User user=new User();
user.setId(1);
user.setUsername("test");
user.setPassword("test");
System.out.println("11111111562");
return user;
}
}
```
7. ConsumerTest
```java
package com.test.dubbo;
import com.test.dubbo.service.EchoService;
import com.netflix.config.ConfigurationManager;
import com.netflix.hystrix.HystrixThreadPoolKey;
import com.netflix.hystrix.HystrixThreadPoolProperties;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.strategy.properties.HystrixPropertiesFactory;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.concurrent.TimeUnit;
public class ConsumerTest {
EchoService echoService;
@Before
public void before() {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "consumer.xml" });
context.start();
echoService = (EchoService) context.getBean("echoService", EchoService.class);
}
@Test
public void test() {
Assert.assertEquals("Hello World", echoService.sayHello());
// System.out.println(echoService.sayHello());
}
@Test
public void testTimeout() {
// Assert.assertEquals("Hello World", echoService.echoWithTimeOut());
System.out.println(echoService.echoWithTimeOut());
System.out.println("555555555555555");
}
@Test
public void testEchoException() {
//echoService.echoWithException();
// try {
echoService.getUser(1);
// } catch (Exception e) {
// e.printStackTrace();
// }
System.out.println("666666666666");
}
@Test
public void testThreadPool() throws InterruptedException {
for (int i = 0; i < 20; i++) {
new Thread(() -> {
echoService.sayHello();
}).start();
System.out.println("i==="+i);
Thread.sleep(100);
}
// for (int i = 0; i < 5; i++) {
// String res =echoService.sayHello();
// System.out.println("test=" + i + ":" + res + " The time:" + (System.currentTimeMillis() / 1000));
// Thread.sleep(200);
// }
System.out.println("test...");
}
}
```
7. ProviderTest
```java
package com.test.dubbo;
import org.junit.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class ProviderTest {
@Test
public void test() throws Exception {
ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"provider.xml"});
context.start();
System.in.read(); // 按任意键退出
context.close();
}
}
```
[ Full content available at: https://github.com/apache/incubator-dubbo/issues/2664 ]
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