Dubbo implements service call statistics, service degradation alarms, and service routing adjustments
Dubbo is an open-source high-performance, lightweight Java RPC framework that supports functions such as service invocation, load balancing, service degradation, and service routing. The following is a brief introduction to Dubbo's implementation of service call statistics, service degradation alarms, and related dependency class libraries for service routing adjustment.
1. Service Call Statistics Function Dependency Class Library:
-Class library name: dubbo monitor
-Maven coordinates:
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-monitor</artifactId>
<version>{dubbo-version}</version>
</dependency>
-Brief introduction: Dubbo monitor is a monitoring center provided by Dubbo, which can collect and display statistical information such as service call times and success rates.
2. Service degradation alarm function dependency class library:
-Class library name: sentinel-dubbo-adapter
-Maven coordinates:
<dependency>
<groupId>com.alibaba.csp</groupId>
<artifactId>sentinel-dubbo-adapter</artifactId>
<version>{sentinel-version}</version>
</dependency>
-Brief introduction: Sentinel Dubo adapter is Alibaba's open-source traffic guard Sentinel's Dubbo adapter, which can downgrade and limit Dubbo services, and supports sending alarm notifications when downgraded.
3. Service routing adjustment function dependency class library:
-Class library name: dubbo admin
-Maven coordinates:
<dependency>
<groupId>org.apache.dubbo</groupId>
<artifactId>dubbo-admin</artifactId>
<version>{dubbo-version}</version>
</dependency>
-Brief introduction: Dubbo admin is a management console provided by Dubbo, which can be used to dynamically configure and adjust service routing rules, and achieve service routing adjustment.
The following is a complete Dubbo example that covers the functions of service call statistics, service degradation alarms, and service routing adjustment. The following code shows the implementation of a Dubbo service provider and consumer, and configures Dubbo based on the above functions.
Provider side code:
public interface HelloService {
String sayHello(String name);
}
public class HelloServiceImpl implements HelloService {
@Override
public String sayHello(String name) {
return "Hello, " + name;
}
}
//Provider side configuration
public class Provider {
public static void main(String[] args) {
//Using the zookeeper registry
RegistryConfig registry = new RegistryConfig();
registry.setAddress("zookeeper://127.0.0.1:2181");
//Using the Dubbo protocol
ProtocolConfig protocol = new ProtocolConfig();
protocol.setName("dubbo");
protocol.setPort(20880);
//Service Provider Configuration
ProviderConfig provider = new ProviderConfig();
provider.setRegistry(registry);
provider.setProtocol(protocol);
//Service Consumer Interface
ServiceConfig<HelloService> service = new ServiceConfig<>();
service.setInterface(HelloService.class);
service.setRef(new HelloServiceImpl());
service.setProvider(provider);
service.export();
System.out.println("Dubbo provider started.");
try {
System.in.read();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Consumer code:
public class Consumer {
public static void main(String[] args) {
//Using the zookeeper registry
RegistryConfig registry = new RegistryConfig();
registry.setAddress("zookeeper://127.0.0.1:2181");
//Service Consumer Configuration
ReferenceConfig<HelloService> reference = new ReferenceConfig<>();
reference.setInterface(HelloService.class);
reference.setRegistry(registry);
HelloService helloService = reference.get();
System.out.println(helloService.sayHello("Dubbo"));
System.out.println("Dubbo consumer started.");
}
}
Summary:
Dubbo implements service call statistics, service degradation alarms, and service routing adjustment functions through a dependency class library. By relying on dubbo monitor, service invocation statistics can be collected and displayed; By relying on sentinel-dubbo-adapter dependencies, service degradation and current limiting can be achieved, and alarm notifications can be sent when degradation occurs; By relying on dubbo admin, the routing rules of services can be dynamically configured and adjusted. The above is a complete example based on Dubbo, demonstrating the implementation of service providers and consumers, and configuring the use of related functions. Through Dubbo's powerful capabilities, reliable and high-performance distributed services can be provided.
