//
//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;
//
///**
// * <p>
// * sentinel规则数据持久化到本地文件
// * </p>
// *
// * @author dengsixing
// * @since 2022/1/26
// **/
//public class SentinelFileDataSourceInitFunc implements InitFunc {
//
//    @Override
//    public void init() throws Exception {
//        //持久化在本地的目录
//        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<List<FlowRule>>(
//                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()) {
//            file.createNewFile();
//        }
//    }
//
//    private <T> String encodeJson(T t) {
//        return JSON.toJSONString(t);
//    }
//}
