Java中基于推、拉模式的sentinel规则持久化详解
作者:雪峰.贵
这篇文章主要介绍了Java中基于推、拉模式的sentinel规则持久化详解,推模式是sentinelDashboard 把规则推给Nacos,Nacos监听规则的变化推给微服务,拉模式是sentinelDashboard 把规则直接给微服务, Nacos定时的同步微服务端的规则,需要的朋友可以参考下
推 模式
sentinelDashboard 把规则 推给Nacos,Nacos监听规则的变化推给微服务
下载sentinel懒人包
执行 java -jar sentinel-dashboard.jar
加依赖
<dependency> <groupId>com.alibaba.csp</groupId> <artifactId>sentinel-datasource-nacos</artifactId> </dependency>
加配置
spring: cloud: sentinel: datasource: # 名称随意 flow: nacos: server-addr: localhost:8848 dataId: ${spring.application.name}-flow-rules groupId: SENTINEL_GROUP # 规则类型,取值见: # org.springframework.cloud.alibaba.sentinel.datasource.RuleType rule-type: flow degrade: nacos: server-addr: localhost:8848 dataId: ${spring.application.name}-degrade-rules groupId: SENTINEL_GROUP rule-type: degrade system: nacos: server-addr: localhost:8848 dataId: ${spring.application.name}-system-rules groupId: SENTINEL_GROUP rule-type: system authority: nacos: server-addr: localhost:8848 dataId: ${spring.application.name}-authority-rules groupId: SENTINEL_GROUP rule-type: authority param-flow: nacos: server-addr: localhost:8848 dataId: ${spring.application.name}-param-flow-rules groupId: SENTINEL_GROUP rule-type: param-flow
拉模式
sentinelDashboard 把规则直接给微服务, Nacos定时的同步微服务端的规则。
加依赖
<dependency> <groupId>com.alibaba.csp</groupId> <artifactId>sentinel-datasource-extension</artifactId> </dependency>
创建FileDataSourceInit
import com.alibaba.csp.sentinel.command.handler.ModifyParamFlowRulesCommandHandler; import com.alibaba.csp.sentinel.datasource.*; import com.alibaba.csp.sentinel.init.InitFunc; import com.alibaba.csp.sentinel.slots.block.authority.AuthorityRule; import com.alibaba.csp.sentinel.slots.block.authority.AuthorityRuleManager; import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRule; import com.alibaba.csp.sentinel.slots.block.degrade.DegradeRuleManager; import com.alibaba.csp.sentinel.slots.block.flow.FlowRule; import com.alibaba.csp.sentinel.slots.block.flow.FlowRuleManager; import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRule; import com.alibaba.csp.sentinel.slots.block.flow.param.ParamFlowRuleManager; import com.alibaba.csp.sentinel.slots.system.SystemRule; import com.alibaba.csp.sentinel.slots.system.SystemRuleManager; import com.alibaba.csp.sentinel.transport.util.WritableDataSourceRegistry; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.TypeReference; import lombok.extern.slf4j.Slf4j; import java.io.File; import java.io.IOException; import java.util.List; /** * 拉模式规则持久化 * * @author itmuch.com */ @Slf4j public class FileDataSourceInit implements InitFunc { @Override public void init() throws Exception { // TIPS: 如果你对这个路径不喜欢,可修改为你喜欢的路径 String ruleDir = "E:\\ideaworkspace\\content-center\\src\\main\\resources\\sentinel\\rules"; String flowRulePath = ruleDir + "\\flow-rule.json"; String degradeRulePath = ruleDir + "\\degrade-rule.json"; String systemRulePath = ruleDir + "\\system-rule.json"; String authorityRulePath = ruleDir + "\\authority-rule.json"; String paramFlowRulePath = ruleDir + "\\param-flow-rule.json"; this.mkdirIfNotExits(ruleDir); this.createFileIfNotExits(flowRulePath); this.createFileIfNotExits(degradeRulePath); this.createFileIfNotExits(systemRulePath); this.createFileIfNotExits(authorityRulePath); this.createFileIfNotExits(paramFlowRulePath); // 流控规则 ReadableDataSource<String, List<FlowRule>> flowRuleRDS = new FileRefreshableDataSource<>( flowRulePath, flowRuleListParser ); // 将可读数据源注册至FlowRuleManager // 这样当规则文件发生变化时,就会更新规则到内存 FlowRuleManager.register2Property(flowRuleRDS.getProperty()); WritableDataSource<List<FlowRule>> flowRuleWDS = new FileWritableDataSource<>( flowRulePath, this::encodeJson ); // 将可写数据源注册至transport模块的WritableDataSourceRegistry中 // 这样收到控制台推送的规则时,Sentinel会先更新到内存,然后将规则写入到文件中 WritableDataSourceRegistry.registerFlowDataSource(flowRuleWDS); // 降级规则 ReadableDataSource<String, List<DegradeRule>> degradeRuleRDS = new FileRefreshableDataSource<>( degradeRulePath, degradeRuleListParser ); DegradeRuleManager.register2Property(degradeRuleRDS.getProperty()); WritableDataSource<List<DegradeRule>> degradeRuleWDS = new FileWritableDataSource<>( degradeRulePath, this::encodeJson ); WritableDataSourceRegistry.registerDegradeDataSource(degradeRuleWDS); // 系统规则 ReadableDataSource<String, List<SystemRule>> systemRuleRDS = new FileRefreshableDataSource<>( systemRulePath, systemRuleListParser ); SystemRuleManager.register2Property(systemRuleRDS.getProperty()); WritableDataSource<List<SystemRule>> systemRuleWDS = new FileWritableDataSource<>( systemRulePath, this::encodeJson ); WritableDataSourceRegistry.registerSystemDataSource(systemRuleWDS); // 授权规则 ReadableDataSource<String, List<AuthorityRule>> authorityRuleRDS = new FileRefreshableDataSource<>( flowRulePath, authorityRuleListParser ); AuthorityRuleManager.register2Property(authorityRuleRDS.getProperty()); WritableDataSource<List<AuthorityRule>> authorityRuleWDS = new FileWritableDataSource<>( authorityRulePath, this::encodeJson ); WritableDataSourceRegistry.registerAuthorityDataSource(authorityRuleWDS); // 热点参数规则 ReadableDataSource<String, List<ParamFlowRule>> paramFlowRuleRDS = new FileRefreshableDataSource<>( paramFlowRulePath, paramFlowRuleListParser ); ParamFlowRuleManager.register2Property(paramFlowRuleRDS.getProperty()); WritableDataSource<List<ParamFlowRule>> paramFlowRuleWDS = new FileWritableDataSource<>( paramFlowRulePath, this::encodeJson ); ModifyParamFlowRulesCommandHandler.setWritableDataSource(paramFlowRuleWDS); } private Converter<String, List<FlowRule>> flowRuleListParser = source -> JSON.parseObject( source, new TypeReference<List<FlowRule>>() { } ); private Converter<String, List<DegradeRule>> degradeRuleListParser = source -> JSON.parseObject( source, new TypeReference<List<DegradeRule>>() { } ); private Converter<String, List<SystemRule>> systemRuleListParser = source -> JSON.parseObject( source, new TypeReference<List<SystemRule>>() { } ); private Converter<String, List<AuthorityRule>> authorityRuleListParser = source -> JSON.parseObject( source, new TypeReference<List<AuthorityRule>>() { } ); private Converter<String, List<ParamFlowRule>> paramFlowRuleListParser = source -> JSON.parseObject( source, new TypeReference<List<ParamFlowRule>>() { } ); private void mkdirIfNotExits(String filePath) throws IOException { File file = new File(filePath); if (!file.exists()) { file.mkdirs(); } } private void createFileIfNotExits(String filePath) throws IOException { File file = new File(filePath); if (!file.exists()) { if (!file.createNewFile()) { log.warn("文件创建失败!filePath = {}", filePath); } } } private <T> String encodeJson(T t) { return JSON.toJSONString(t); } }
创建目录与文件
文件里写入FileDataSourceInit 的全路径,即 包名+类名
到此这篇关于Java中基于推、拉模式的sentinel规则持久化详解的文章就介绍到这了,更多相关推、拉模式的sentinel规则持久化内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!