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add spring cloud sentinel circuitbreaker demo

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This commit is contained in:
fangjian0423 2020-01-14 15:06:26 +08:00
parent b70129c17f
commit ddceb5f312
2 changed files with 37 additions and 2 deletions
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22
spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/ServiceApplication.java
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@ -16,11 +16,18 @@
package com.alibaba.cloud.examples;
import java.util.Collections;
import com.alibaba.cloud.circuitbreaker.sentinel.SentinelCircuitBreakerFactory;
import com.alibaba.cloud.circuitbreaker.sentinel.SentinelConfigBuilder;
import com.alibaba.cloud.sentinel.annotation.SentinelRestTemplate;
import com.alibaba.csp.sentinel.datasource.Converter;
import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRule;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.circuitbreaker.Customizer;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@ -31,8 +38,7 @@ import org.springframework.web.client.RestTemplate;
public class ServiceApplication {
@Bean
@SentinelRestTemplate(blockHandler = "handleException",
blockHandlerClass = ExceptionUtil.class)
@SentinelRestTemplate(blockHandler = "handleException", blockHandlerClass = ExceptionUtil.class)
public RestTemplate restTemplate() {
return new RestTemplate();
}
@ -47,6 +53,18 @@ public class ServiceApplication {
return new JsonFlowRuleListConverter();
}
@Bean
public Customizer<SentinelCircuitBreakerFactory> defaultConfig() {
return factory -> {
factory.configureDefault(
id -> new SentinelConfigBuilder().resourceName(id)
.rules(Collections.singletonList(new DegradeRule(id)
.setGrade(RuleConstant.DEGRADE_GRADE_RT).setCount(100)
.setTimeWindow(10)))
.build());
};
}
public static void main(String[] args) {
SpringApplication.run(ServiceApplication.class, args);
}

17
spring-cloud-alibaba-examples/sentinel-example/sentinel-core-example/src/main/java/com/alibaba/cloud/examples/TestController.java
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@ -19,6 +19,7 @@ package com.alibaba.cloud.examples;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.circuitbreaker.CircuitBreakerFactory;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
@ -32,6 +33,9 @@ public class TestController {
@Autowired
private RestTemplate restTemplate;
@Autowired
private CircuitBreakerFactory circuitBreakerFactory;
@GetMapping("/hello")
@SentinelResource("resource")
public String hello() {
@ -54,4 +58,17 @@ public class TestController {
return restTemplate.getForObject("http://www.taobao.com/test", String.class);
}
@GetMapping("/slow")
public String slow() {
return circuitBreakerFactory.create("show").run(() -> {
try {
Thread.sleep(1000L);
}
catch (InterruptedException e) {
e.printStackTrace();
}
return "success";
}, throwable -> "fallback");
}
}