1.加依赖:

<dependency> <groupId>com.alibaba.csp</groupId> <artifactId>sentinel-datasource-extension</artifactId></dependency>

2.增加操作类(建议放在所有服务的公共包中):

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 java.io.File;import java.io.IOException;import java.util.List;public class FileDataSourceInit implements InitFunc { 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>>() { } ); @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 = System.getProperty("user.home") + "/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<>( authorityRulePath, 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 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()) { file.createNewFile(); } } private <T> String encodeJson(T t) { return JSON.toJSONString(t); }}

3.增加配置文件:

注意不要在编辑器下面复制，目录结构会有问题，在实际的window目录下进行复制

// 每个微服务都必须增加一次，例如: tsca-server-authE:\projects\tsca\tsca-server\tsca-server-auth\src\main\resources\META-INF\services\com.alibaba.csp.sentinel.init.InitFunc// 文件内容是(注意单行,不能有多余换行,可以用notepad++编辑,idea会自带换行):cn.safi16.tsca.common.sentinel.FileDataSourceInit