有哪些做特卖的网站,电商网站建设商业计划书,杭州建电商网站多少钱,一般的网站开发语言用什么目录 1. sentinel使用场景
2. sentinel组成
3. sentinel dashboard搭建 4. sentinel客户端详细使用
4.1 引入依赖
4.2 application.properties增加dashboard注册地址
4.3 手动增加限流配置类
4.4 rest接口及service类
4.5 通过dashboard动态配置限流规则 1. sentinel使…目录 1. sentinel使用场景
2. sentinel组成
3. sentinel dashboard搭建 4. sentinel客户端详细使用
4.1 引入依赖
4.2 application.properties增加dashboard注册地址
4.3 手动增加限流配置类
4.4 rest接口及service类
4.5 通过dashboard动态配置限流规则 1. sentinel使用场景
限流、熔断、监控、动态规则配置
2. sentinel组成
由两部分组成
第一个是dashboard监控仪表盘单独的jar官网下载后启动可监控所有服务、动态发现服务、配置限流策略、熔断等
第二个是sentinel的客户端核心包供微服务引用注册到dashboard仪表盘引入相关pom及设置相关配置即可
3. sentinel dashboard搭建
启动命令
java -Dserver.port8400 -Dcsp.sentinel.dashboard.serverlocalhost:8400 -Dproject.namehj-sentinel -Dsentinel.dashboard.auth.usernamesentinel -Dsentinel.dashboard.auth.passwordsentinel -jar sentinel-dashboard-1.8.6.jar
启动成功地址栏输入localhost:8400, 如图 4. sentinel客户端详细使用
4.1 引入依赖
dependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-alibaba-sentinel/artifactIdversion2.2.5.RELEASE/version
/dependency
4.2 application.properties增加dashboard注册地址
spring.cloud.sentinel.transport.dashboardlocalhost:8400
4.3 手动增加限流配置类
package hj.example.sampleprovider.sample.config;import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import java.util.ArrayList;
import java.util.List;/*** Description: sentinel 限流规则配置类**/
Configuration
public class SentinelRulesConfig {Beanpublic void initFlowQpsRules() {ListFlowRule rules new ArrayList();FlowRule flowRule new FlowRule();flowRule.setResource(sentinelTest);flowRule.setGrade(RuleConstant.FLOW_GRADE_QPS);flowRule.setCount(1);flowRule.setLimitApp(default);flowRule.setClusterMode(false);flowRule.setControlBehavior(RuleConstant.CONTROL_BEHAVIOR_DEFAULT);rules.add(flowRule);FlowRule flowRule1 new FlowRule();flowRule1.setResource(sayHello);flowRule1.setGrade(RuleConstant.FLOW_GRADE_QPS);flowRule1.setCount(1);flowRule1.setLimitApp(default);flowRule1.setClusterMode(false);flowRule1.setControlBehavior(RuleConstant.CONTROL_BEHAVIOR_DEFAULT);rules.add(flowRule1);FlowRuleManager.loadRules(rules);}
}4.4 rest接口及service类
其中sentinelTest为rest接口限流sayHello为方法限流
package hj.example.sampleprovider.sample.controller;import com.alibaba.csp.sentinel.Entry;
import com.alibaba.csp.sentinel.SphU;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.alibaba.csp.sentinel.slots.block.RuleConstant;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRule;
import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager;
import com.alibaba.fastjson.JSONObject;
import hj.example.sampleprovider.sample.HelloServiceImpl;
import hj.example.sampleprovider.sample.config.SentinelRulesConfig;
import org.apache.commons.lang.time.DateFormatUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.ArrayList;
import java.util.Date;
import java.util.List;/*** Description: TODO**/
RestController
public class SentinelTestController {Autowiredprivate HelloServiceImpl helloService;RequestMapping(/testClean/{id})public ResponseEntityObject testClean(PathVariable(id) String id) {String resultStr String.format(test clean id: %s [%s], id, DateFormatUtils.format(new Date(), yyyy-MM-dd HH:mm:ss ssss));return new ResponseEntity(resultStr , HttpStatus.OK);}RequestMapping(/testSentinelDynamicDashboard)public ResponseEntityObject testSentinelDynamicDashboard() {String resultStr String.format(testSentinelDynamicDashboard [%s], DateFormatUtils.format(new Date(), yyyy-MM-dd HH:mm:ss sss));return new ResponseEntity(resultStr, HttpStatus.OK);}RequestMapping(/sayHello)public ResponseEntityObject sayHelloTest() {String helloStr helloService.sayHello(sayHelloTest);return new ResponseEntity(helloStr, HttpStatus.OK);}SentinelResource(value sentinelTest, blockHandler sentinelTestHandler)RequestMapping(/sentinelTest)public ResponseEntityObject sentinelTest() {System.out.println( sentinelTest : DateFormatUtils.format(new Date(), yyyy-MM-dd HH:mm:ss sss));return new ResponseEntity(sentinelTest , HttpStatus.OK);}public ResponseEntityObject sentinelTestHandler(BlockException e) {System.out.println(被限流了);return new ResponseEntity(sentinelTestHandler 被限流了: JSONObject.toJSONString(e), HttpStatus.OK);}
}package hj.example.sampleprovider.sample;import com.alibaba.csp.sentinel.Entry;
import com.alibaba.csp.sentinel.SphU;
import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.alibaba.fastjson.JSON;
import hj.example.sample.IHelloService;
import org.apache.commons.lang.time.DateFormatUtils;
import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.beans.factory.annotation.Value;
import test.SentinelTest;import javax.xml.bind.ValidationException;
import java.util.Date;DubboService
public class HelloServiceImpl implements IHelloService {Value(${dubbo.application.name})private String serviceName;SentinelResource(value sayHello, blockHandler sayHelloBlockHandler)public String sayHello(String name) {System.out.printf([%s]: Hello, %s%n, serviceName, name);return String.format([%s]: Hello, %s, serviceName, name);}public String sayHelloBlockHandler(String name, BlockException e) throws ValidationException {System.out.println(sayHello 被限流了。name: name ,被限流了 JSON.toJSONString(e));return sayHello 被限流了。name: name ,被限流了 JSON.toJSONString(e);}public void sentinelTestMethod() {try(Entry entry SphU.entry(sentinelTestMethod)) {System.out.println(hello sentinel : DateFormatUtils.format(new Date(), yyyy-MM-dd HH:mm:ss sss));}catch (BlockException e) {e.printStackTrace();}}public void sentinelTestHandler(BlockException e) throws ValidationException {e.printStackTrace();throw new ValidationException(e.getMessage());}
}4.5 通过dashboard动态配置限流规则
