This example shows how to use```spring-cloud-starter-tencent-polaris-circuitbreaker``` in Spring Cloud project and other features
This example shows how to use```spring-cloud-starter-tencent-polaris-circuitbreaker```in Spring Cloud project for its 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```.
This example contains callee-service```polaris-circuitbreaker-callee-service```、```polaris-circuitbreaker-callee-service2```and caller-service```polaris-circuitbreaker-feign-example```、```polaris-circuitbreaker-gateway-example```、```polaris-circuitbreaker-webclient-example```.
## Instruction
@ -21,58 +21,46 @@ spring:
address: ${ip}:${port}
```
###Launching Example
###Launching Example
###Launching Polaris Backend Service
#### Launching Polaris Backend Service
Reference to [Polaris Getting Started](https://github.com/PolarisMesh/polaris#getting-started)
####Launching Application
#### Launching callee service
Note, because verification is needed for circuit-break feature, therefore, one needs to deploy more than two invoked services (two deployment in this example)
Launching```spring-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.
#### Launching caller service
Two Services B's ```com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info``` logics are different. One returns normally, one is abnormal.
Execute under ```spring-cloud-tencent-examples/polaris-discovery-example```
Sending request`curl --location --request GET 'http://127.0.0.1:48080/example/service/a/getBServiceInfo/fallbackFromPolaris'`, Verify circuit breaker and fallback from Polaris-server.
note, Service B needs to launch two. One can adjust the port on the same machine.
Sending request`curl --location --request GET 'http://127.0.0.1:48080/example/service/a/getBServiceInfo/fallbackFromCode'`, Verify circuit breaker and fallback from code.
Two Services B's com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info logics are different. One returns normally, one is abnormal.
Then under ``polaris-circuitbreaker-example-a``` and ``polaris-circuitbreaker-example-b``` find the package that generated jar, and run it
Sending request`curl --location --request GET 'http://127.0.0.1:48080/example/service/a/getBServiceInfo/fallbackFromPolaris'`, Verify circuit breaker and fallback from Polaris-server.
```
java -jar ${app.jar}
```
Sending request`curl --location --request GET 'http://127.0.0.1:48080/example/service/a/getBServiceInfo/fallbackFromCode'`, Verify circuit breaker and fallback from code.
Launch application, change ${app.jar} to jar's package name
Sending request`curl --location --request GET 'http://127.0.0.1:48080/example/service/a/getBServiceInfo'`, Verify circuit breaker and fallback from code.
Execute the following orders to invoke Feign, the logic is ```ServiceB``` has an abnormal signal
##### Launching SCG and Verify
```shell
curl -L -X GET 'localhost:48080/example/service/a/getBServiceInfo'
Sending request`curl --location --request GET 'http://127.0.0.1:48080/polaris-circuitbreaker-callee-service/example/service/b/info'`, Verify circuit breaker and fallback from code.
when appear
```
trigger the refuse for service b
```
Changing```polaris-circuitbreaker-example/polaris-circuitbreaker-gateway-example/resources/bootstrap.yml```, delete local fallback and restart, Verify circuit breaker and fallback from Polaris-server.
it means the request signals abnormal ServiceB, and will ciruitbreak this instance, the later requests will return normally.
Shanyou Yu (Sean Yu)
2 years ago
committed by
GitHub