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README.md
Spring Cloud Polaris CircuitBreaker Example
Example Introduction
The examples will explain how to usespring-cloud-starter-tencent-polaris-circuitbreaker
in Spring Cloud project and other features
This example is divided to two microservice, polaris-circuitbreaker-example-a
and polaris-circuitbreaker-example-b
. In these two microservices, polaris-circuitbreaker-example-a
invokes polaris-circuitbreaker-example-b
.
Instruction
Configuration
src/main/resources
and bootstrap.yml
of two micro-services add the following instructions. {ip} and
{port} are Polaris backend IP address and port number.
spring:
application:
name: ${application.name}
cloud:
polaris:
server-addr: ${ip}:${port}
###Launching Example
###Launching Polaris Backend Service
Reference to Polaris
####Launching Application
Note, because verification is needed for circuit-break feature, therefore, one needs to deploy more than two invoked services (two deployment in this example)
Launchingspring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-a
's ServiceA and spring-cloud-tencent-examples/polaris-circuitbreaker-example/polaris-circuitbreaker-example-b
's ServiceB
note, Service B needs to launch two. One can adjust the port on the same machine.
Two Services B's com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info
logics are different. One returns normally, one is abnormal.
- Maven Package Launching
Execute under ``spring-cloud-tencent-examples/polaris-discovery-example```
note, Service B needs to launch two. One can adjust the port on the same machine.
Two Services B's com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info logics are different. One returns normally, one is abnormal.
mvn clean package
Then under polaris-circuitbreaker-example-a``` and
polaris-circuitbreaker-example-b``` find the package that generated jar, and run it
java -jar ${app.jar}
Launch application, change ${app.jar} to jar's package name
##Verify
####Feign Invoke
Execute the following orders to invoke Feign, the logic is ServiceB
has an abnormal signal
curl -L -X GET 'localhost:48080/example/service/a/getBServiceInfo'
Expected return condition:
when appear
trigger the refuse for service b
it means the request signals abnormal ServiceB, and will ciruitbreak this instance, the later requests will return normally.