【springcloud 微服务】Spring Cloud Alibaba整合Sentinel详解

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
 
@RestController
public class TestController {
 
    @GetMapping("/testA")
    @SentinelResource(value = "testA", blockHandler = "handleExceptionA")
    public String testA() {
        return "Hello, Sentinel A";
    }
 
    public String handleExceptionA(BlockException ex) {
        return "Error: " + ex.getClass().getSimpleName();
    }
 
    @GetMapping("/testB")
    @SentinelResource(value = "testB", blockHandler = "handleExceptionB")
    public String testB() {
        return "Hello, Sentinel B";
    }
 
    public String handleExceptionB(BlockException ex) {
        return "Error: " + ex.getClass().getSimpleName();
    }
}

这个代码示例展示了如何在Spring Cloud Alibaba项目中使用Sentinel进行资源的保护以及定义异常处理方法。通过@SentinelResource注解指定资源名和异常处理方法，当资源访问受限时，会调用对应的异常处理方法。