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78 lines
2.5 KiB
78 lines
2.5 KiB
# Spring Cloud Polaris CircuitBreaker Example
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## Example Introduction
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This example shows how to use```spring-cloud-starter-tencent-polaris-circuitbreaker``` in Spring Cloud project and other features
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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```.
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## Instruction
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### Configuration
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The configuration is as the following shows. ${ip} and ${port} are Polaris backend IP address and port number.
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```yaml
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spring:
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application:
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name: ${application.name}
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cloud:
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polaris:
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address: ${ip}:${port}
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```
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###Launching Example
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###Launching Polaris Backend Service
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Reference to [Polaris Getting Started](https://github.com/PolarisMesh/polaris#getting-started)
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####Launching Application
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Note, because verification is needed for circuit-break feature, therefore, one needs to deploy more than two invoked services (two deployment in this example)
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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
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note, Service B needs to launch two. One can adjust the port on the same machine.
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Two Services B's ```com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info``` logics are different. One returns normally, one is abnormal.
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- Maven Package Launching
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Execute under ```spring-cloud-tencent-examples/polaris-discovery-example```
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note, Service B needs to launch two. One can adjust the port on the same machine.
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Two Services B's com.tencent.cloud.polaris.circuitbreaker.example.ServiceBController.info logics are different. One returns normally, one is abnormal.
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```sh
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mvn clean package
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```
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Then under ``polaris-circuitbreaker-example-a``` and ``polaris-circuitbreaker-example-b``` find the package that generated jar, and run it
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```
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java -jar ${app.jar}
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```
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Launch application, change ${app.jar} to jar's package name
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##Verify
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####Feign Invoke
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Execute the following orders to invoke Feign, the logic is ```ServiceB``` has an abnormal signal
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```shell
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curl -L -X GET 'localhost:48080/example/service/a/getBServiceInfo'
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```
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Expected return condition:
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when appear
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```
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trigger the refuse for service b
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```
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it means the request signals abnormal ServiceB, and will ciruitbreak this instance, the later requests will return normally. |