1.加依賴:

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  com.alibaba.csp
  sentinel-datasource-extension

2.增加操作類(建議放在所有服務(wù)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> flowRuleListParser = source -> JSON.parseObject(
            source,
            new TypeReference>() {
            }
    );
    private Converter> degradeRuleListParser = source -> JSON.parseObject(
            source,
            new TypeReference>() {
            }
    );
    private Converter> systemRuleListParser = source -> JSON.parseObject(
            source,
            new TypeReference>() {
            }
    );
    private Converter> authorityRuleListParser = source -> JSON.parseObject(
            source,
            new TypeReference>() {
            }
    );
    private Converter> paramFlowRuleListParser = source -> JSON.parseObject(
            source,
            new TypeReference>() {
            }
    );

    @Override
    public void init() throws Exception {
        // TIPS: 如果你對(duì)這個(gè)路徑不喜歡，可修改為你喜歡的路徑
        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);

        // 流控規(guī)則
        ReadableDataSource> flowRuleRDS = new FileRefreshableDataSource<>(
                flowRulePath,
                flowRuleListParser
        );
        // 將可讀數(shù)據(jù)源注冊(cè)至FlowRuleManager
        // 這樣當(dāng)規(guī)則文件發(fā)生變化時(shí)，就會(huì)更新規(guī)則到內(nèi)存
        FlowRuleManager.register2Property(flowRuleRDS.getProperty());
        WritableDataSource> flowRuleWDS = new FileWritableDataSource<>(
                flowRulePath,
                this::encodeJson
        );
        // 將可寫數(shù)據(jù)源注冊(cè)至transport模塊的WritableDataSourceRegistry中
        // 這樣收到控制臺(tái)推送的規(guī)則時(shí)，Sentinel會(huì)先更新到內(nèi)存，然后將規(guī)則寫入到文件中
        WritableDataSourceRegistry.registerFlowDataSource(flowRuleWDS);

        // 降級(jí)規(guī)則
        ReadableDataSource> degradeRuleRDS = new FileRefreshableDataSource<>(
                degradeRulePath,
                degradeRuleListParser
        );
        DegradeRuleManager.register2Property(degradeRuleRDS.getProperty());
        WritableDataSource> degradeRuleWDS = new FileWritableDataSource<>(
                degradeRulePath,
                this::encodeJson
        );
        WritableDataSourceRegistry.registerDegradeDataSource(degradeRuleWDS);

        // 系統(tǒng)規(guī)則
        ReadableDataSource> systemRuleRDS = new FileRefreshableDataSource<>(
                systemRulePath,
                systemRuleListParser
        );
        SystemRuleManager.register2Property(systemRuleRDS.getProperty());
        WritableDataSource> systemRuleWDS = new FileWritableDataSource<>(
                systemRulePath,
                this::encodeJson
        );
        WritableDataSourceRegistry.registerSystemDataSource(systemRuleWDS);

        // 授權(quán)規(guī)則
        ReadableDataSource> authorityRuleRDS = new FileRefreshableDataSource<>(
                authorityRulePath,
                authorityRuleListParser
        );
        AuthorityRuleManager.register2Property(authorityRuleRDS.getProperty());
        WritableDataSource> authorityRuleWDS = new FileWritableDataSource<>(
                authorityRulePath,
                this::encodeJson
        );
        WritableDataSourceRegistry.registerAuthorityDataSource(authorityRuleWDS);

        // 熱點(diǎn)參數(shù)規(guī)則
        ReadableDataSource> paramFlowRuleRDS = new FileRefreshableDataSource<>(
                paramFlowRulePath,
                paramFlowRuleListParser
        );
        ParamFlowRuleManager.register2Property(paramFlowRuleRDS.getProperty());
        WritableDataSource> 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  String encodeJson(T t) {
        return JSON.toJSONString(t);
    }
}

3.增加配置文件:

注意不要在編輯器下面復(fù)制，目錄結(jié)構(gòu)會(huì)有問題，在實(shí)際的window目錄下進(jìn)行復(fù)制

// 每個(gè)微服務(wù)都必須增加一次，例如: tsca-server-auth
E:\projects\tsca\tsca-server\tsca-server-auth\src\main\resources\META-INF\services\com.alibaba.csp.sentinel.init.InitFunc

// 文件內(nèi)容是(注意單行,不能有多余換行,可以用notepad++編輯,idea會(huì)自帶換行):
cn.safi16.tsca.common.sentinel.FileDataSourceInit