package com.alibaba.csp.sentinel.dashboard.controller;
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import java.util.Date;
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import java.util.List;
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import com.alibaba.csp.sentinel.dashboard.auth.AuthAction;
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import com.alibaba.csp.sentinel.dashboard.auth.AuthService.PrivilegeType;
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import com.alibaba.csp.sentinel.dashboard.controller.base.BaseRuleController;
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import com.alibaba.csp.sentinel.dashboard.repository.rule.RuleRepository;
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import com.alibaba.csp.sentinel.dashboard.rule.DynamicRuleProvider;
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import com.alibaba.csp.sentinel.dashboard.rule.DynamicRulePublisher;
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import com.alibaba.csp.sentinel.slots.block.RuleConstant;
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import com.alibaba.csp.sentinel.slots.block.degrade.circuitbreaker.CircuitBreakerStrategy;
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import com.alibaba.csp.sentinel.util.StringUtil;
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import com.alibaba.csp.sentinel.dashboard.datasource.entity.rule.DegradeRuleEntity;
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import com.alibaba.csp.sentinel.dashboard.domain.Result;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.web.bind.annotation.DeleteMapping;
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import org.springframework.web.bind.annotation.GetMapping;
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import org.springframework.web.bind.annotation.PathVariable;
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import org.springframework.web.bind.annotation.PostMapping;
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import org.springframework.web.bind.annotation.PutMapping;
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import org.springframework.web.bind.annotation.RequestBody;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RestController;
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/**
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* 降级规则控制器
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*
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* @author zyf
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* @date 2022-04-13
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*/
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@RestController
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@RequestMapping("/degrade")
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public class DegradeController extends BaseRuleController {
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private final Logger logger = LoggerFactory.getLogger(DegradeController.class);
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@Autowired
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private RuleRepository<DegradeRuleEntity, Long> repository;
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@Autowired
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@Qualifier("degradeRuleNacosProvider")
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private DynamicRuleProvider<List<DegradeRuleEntity>> ruleProvider;
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@Autowired
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@Qualifier("degradeRuleNacosPublisher")
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private DynamicRulePublisher<List<DegradeRuleEntity>> rulePublisher;
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@GetMapping("/rules.json")
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@AuthAction(PrivilegeType.READ_RULE)
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public Result<List<DegradeRuleEntity>> apiQueryMachineRules(String app, String ip, Integer port) {
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if (StringUtil.isEmpty(app)) {
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return Result.ofFail(-1, "app can't be null or empty");
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}
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if (StringUtil.isEmpty(ip)) {
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return Result.ofFail(-1, "ip can't be null or empty");
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}
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if (port == null) {
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return Result.ofFail(-1, "port can't be null");
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}
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try {
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List<DegradeRuleEntity> rules = ruleProvider.getRules(app);
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rules = repository.saveAll(rules);
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return Result.ofSuccess(rules);
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} catch (Throwable throwable) {
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logger.error("queryApps error:", throwable);
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return Result.ofThrowable(-1, throwable);
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}
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}
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@PostMapping("/rule")
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@AuthAction(PrivilegeType.WRITE_RULE)
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public Result<DegradeRuleEntity> apiAddRule(@RequestBody DegradeRuleEntity entity) {
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Result<DegradeRuleEntity> checkResult = checkEntityInternal(entity);
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if (checkResult != null) {
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return checkResult;
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}
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Date date = new Date();
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entity.setGmtCreate(date);
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entity.setGmtModified(date);
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try {
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entity = repository.save(entity);
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publishRules(entity.getApp());
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} catch (Throwable t) {
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logger.error("Failed to add new degrade rule, app={}, ip={}", entity.getApp(), entity.getIp(), t);
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return Result.ofThrowable(-1, t);
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}
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return Result.ofSuccess(entity);
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}
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@PutMapping("/rule/{id}")
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@AuthAction(PrivilegeType.WRITE_RULE)
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public Result<DegradeRuleEntity> apiUpdateRule(@PathVariable("id") Long id,
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@RequestBody DegradeRuleEntity entity) {
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if (id == null || id <= 0) {
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return Result.ofFail(-1, "id can't be null or negative");
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}
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DegradeRuleEntity oldEntity = repository.findById(id);
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if (oldEntity == null) {
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return Result.ofFail(-1, "Degrade rule does not exist, id=" + id);
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}
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entity.setApp(oldEntity.getApp());
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entity.setIp(oldEntity.getIp());
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entity.setPort(oldEntity.getPort());
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entity.setId(oldEntity.getId());
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Result<DegradeRuleEntity> checkResult = checkEntityInternal(entity);
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if (checkResult != null) {
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return checkResult;
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}
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entity.setGmtCreate(oldEntity.getGmtCreate());
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entity.setGmtModified(new Date());
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try {
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entity = repository.save(entity);
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publishRules(entity.getApp());
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} catch (Throwable t) {
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logger.error("Failed to save degrade rule, id={}, rule={}", id, entity, t);
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return Result.ofThrowable(-1, t);
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}
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return Result.ofSuccess(entity);
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}
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@DeleteMapping("/rule/{id}")
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@AuthAction(PrivilegeType.DELETE_RULE)
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public Result<Long> delete(@PathVariable("id") Long id) {
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if (id == null) {
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return Result.ofFail(-1, "id can't be null");
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}
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DegradeRuleEntity oldEntity = repository.findById(id);
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if (oldEntity == null) {
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return Result.ofSuccess(null);
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}
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try {
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repository.delete(id);
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publishRules(oldEntity.getApp());
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} catch (Throwable throwable) {
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logger.error("Failed to delete degrade rule, id={}", id, throwable);
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return Result.ofThrowable(-1, throwable);
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}
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return Result.ofSuccess(id);
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}
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private void publishRules(/*@NonNull*/ String app) throws Exception {
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List<DegradeRuleEntity> rules = repository.findAllByApp(app);
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rulePublisher.publish(app, rules);
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//延迟加载
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delayTime();
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}
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private <R> Result<R> checkEntityInternal(DegradeRuleEntity entity) {
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if (StringUtil.isBlank(entity.getApp())) {
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return Result.ofFail(-1, "app can't be blank");
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}
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if (StringUtil.isBlank(entity.getIp())) {
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return Result.ofFail(-1, "ip can't be null or empty");
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}
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if (entity.getPort() == null || entity.getPort() <= 0) {
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return Result.ofFail(-1, "invalid port: " + entity.getPort());
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}
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if (StringUtil.isBlank(entity.getLimitApp())) {
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return Result.ofFail(-1, "limitApp can't be null or empty");
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}
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if (StringUtil.isBlank(entity.getResource())) {
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return Result.ofFail(-1, "resource can't be null or empty");
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}
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Double threshold = entity.getCount();
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if (threshold == null || threshold < 0) {
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return Result.ofFail(-1, "invalid threshold: " + threshold);
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}
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Integer recoveryTimeoutSec = entity.getTimeWindow();
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if (recoveryTimeoutSec == null || recoveryTimeoutSec <= 0) {
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return Result.ofFail(-1, "recoveryTimeout should be positive");
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}
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Integer strategy = entity.getGrade();
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if (strategy == null) {
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return Result.ofFail(-1, "circuit breaker strategy cannot be null");
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}
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if (strategy < CircuitBreakerStrategy.SLOW_REQUEST_RATIO.getType()
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|| strategy > RuleConstant.DEGRADE_GRADE_EXCEPTION_COUNT) {
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return Result.ofFail(-1, "Invalid circuit breaker strategy: " + strategy);
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}
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if (entity.getMinRequestAmount() == null || entity.getMinRequestAmount() <= 0) {
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return Result.ofFail(-1, "Invalid minRequestAmount");
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}
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if (entity.getStatIntervalMs() == null || entity.getStatIntervalMs() <= 0) {
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return Result.ofFail(-1, "Invalid statInterval");
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}
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if (strategy == RuleConstant.DEGRADE_GRADE_RT) {
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Double slowRatio = entity.getSlowRatioThreshold();
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if (slowRatio == null) {
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return Result.ofFail(-1, "SlowRatioThreshold is required for slow request ratio strategy");
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} else if (slowRatio < 0 || slowRatio > 1) {
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return Result.ofFail(-1, "SlowRatioThreshold should be in range: [0.0, 1.0]");
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}
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} else if (strategy == RuleConstant.DEGRADE_GRADE_EXCEPTION_RATIO) {
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if (threshold > 1) {
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return Result.ofFail(-1, "Ratio threshold should be in range: [0.0, 1.0]");
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}
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}
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return null;
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}
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}
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