流程引擎的运行模式有几种？以一套开源 BPM 源码对照 Flowable 与 Camunda

    public enum Platform
    {
        /// <summary>
        /// 该引擎 .net平台.
        /// </summary>
        该引擎,
        /// <summary>
        /// 该引擎 java 平台.
        /// </summary>
        该引擎
    }

    public enum CCBPMRunModel
    {
        /// <summary>
        /// 单机版
        /// </summary>
        Single,
        /// <summary>
        /// 集团模式
        /// </summary>
        GroupInc,
        /// <summary>
        /// 多租户模式
        /// </summary>
        SAAS,
        /// <summary>
        /// 平台应用模式
        /// </summary>
        PASS
    }

<!-- 0=单组织，1=集团，2=SAAS，3=平台应用(PASS) -->
<add key="CCBPMRunModel" value="0"/>

            sqlscript = BP.Difference.SystemConfig.该引擎AppPath + "WF/Data/Install/SQLScript/Port_Inc_CH_RunModel_" + (int)SystemConfig.CCBPMRunModel + ".sql";
            DBAccess.RunSQLScript(sqlscript);

            if (SystemConfig.CCBPMRunModel == CCBPMRunModel.Single)
            {
                BP.Port.Emp empAdmin = new Emp("admin");
                BP.Web.WebUser.SignInOfGener(empAdmin);
            }

            if (SystemConfig.CCBPMRunModel == CCBPMRunModel.SAAS)
            {
                BP.WF.Dev2Interface.Port_Login("admin", "100", null);
            }

            if (SystemConfig.CCBPMRunModel == CCBPMRunModel.GroupInc)
            {
                BP.WF.Dev2Interface.Port_Login("admin", "100", null);
            }

                if (BP.Difference.SystemConfig.CCBPMRunModel == CCBPMRunModel.SAAS)
                    wfSql = " AND A.OrgNo='" + WebUser.OrgNo + "'";

        /// <summary>
        /// 集团模式下的角色体系
        /// @0=每套组织都有自己的角色体系@1=所有的组织共享一套岗则体系.@2=每个部门有自己的角色体系.
        /// </summary>
        public static int GroupStationModel

                        if (BP.Difference.SystemConfig.CCBPMRunModel == CCBPMRunModel.Single)
                            sql = "SELECT Leader,FK_Dept FROM Port_Emp WHERE No='" + empNo + "'";
                        if (BP.Difference.SystemConfig.CCBPMRunModel == CCBPMRunModel.GroupInc)
                            sql = "SELECT Leader,FK_Dept FROM Port_Emp WHERE No='" + empNo + "' And OrgNo = '" + WebUser.OrgNo + "'";
                        if (BP.Difference.SystemConfig.CCBPMRunModel == CCBPMRunModel.SAAS)
                            sql = "SELECT Leader,FK_Dept FROM Port_Emp WHERE No='" + WebUser.OrgNo + "_" + empNo + "'";

                    if (value.StartsWith(BP.Web.WebUser.OrgNo + "_") == true)
                    {
                        this.SetValByKey(EmpAttr.UserID, value.Replace(BP.Web.WebUser.OrgNo + "_", ""));
                    }
                    else
                    {
                        this.SetValByKey(EmpAttr.No, BP.Web.WebUser.OrgNo + "_" + value);
                    }

        public static String Check_CCBPMRunModel()
        {
            String sql = "";
            if (BP.Difference.SystemConfig.CCBPMRunModel == CCBPMRunModel.SAAS)
            {
                sql += " AND A.OrgNo = '" + WebUser.OrgNo + "'";
            }
            return sql;
        }

        public static CCBPMRunModel CCBPMRunModelReal
        {
            get
            {
                int val = BP.Difference.SystemConfig.GetValByKeyInt("CCBPMRunModel", 0);
                if (val == 0 ) return CCBPMRunModel.Single;
                if (val == 1) return CCBPMRunModel.GroupInc;
                if (val == 2) return CCBPMRunModel.SAAS;
                return CCBPMRunModel.PASS;
            }
        }
        public static CCBPMRunModel CCBPMRunModel
        {
            get
            {
                int val = BP.Difference.SystemConfig.GetValByKeyInt("CCBPMRunModel", 0);
                if (val == 0 || val==3) return CCBPMRunModel.Single;
                ...
            }
        }

flowchart TB
    subgraph Frontend["前端 Vue3"]
        Portal["Portal 门户<br/>Middleware / BPM"]
        WF["WF 流程模块"]
        该平台["该平台 低代码"]
        Toolkit["Toolkit SDK"]
        HttpHandler_TS["HttpHandler.ts"]
    end

    subgraph Backend["后端 该引擎 (.NET) / 该引擎 (Java)"]
        API["APIController / InnerForVueController"]
        HH["HttpHandler WF_*"]
        Dev2["Dev2Interface SDK"]
        Engine["WorkNode 流程引擎"]
        Org["Port 组织架构"]
        Form["Sys_MapData 表单引擎"]
        Bill["单据模块 单据引擎"]
    end

    subgraph DB["数据库"]
        Def["WF_Flow / WF_Node 流程定义"]
        Run["WF_GenerWorkFlow 流程实例"]
        Task["WF_GenerWorkerList 待办任务"]
        Port["Port_* 组织人员"]
    end

    Frontend --> HttpHandler_TS
    HttpHandler_TS --> API
    HttpHandler_TS --> HH
    API --> Dev2
    HH --> Dev2
    Dev2 --> Engine
    Dev2 --> Org
    Dev2 --> Form
    Engine --> Run
    Engine --> Task
    Org --> Port
    Form --> DB
    Def --> DB

flowchart TB
    subgraph FlowableCamunda["Flowable / Camunda"]
        REST["REST API"]
        Runtime["RuntimeService"]
        TaskSvc["TaskService"]
        History["HistoryService"]
        Repository["RepositoryService"]
        BPMN["BPMN 2.0 引擎"]
        Identity["IdentityService / 外部 IDM"]
    end

    subgraph FCDB["引擎表"]
        REDEF["ACT_RE_PROCDEF"]
        RUEXE["ACT_RU_EXECUTION"]
        RUTASK["ACT_RU_TASK"]
        HI["ACT_HI_* 历史表"]
    end

    REST --> Runtime
    REST --> TaskSvc
    Runtime --> BPMN
    BPMN --> RUEXE
    TaskSvc --> RUTASK
    Repository --> REDEF

        /// 工作流发送业务处理.
        /// ----------------------------------- 说明 -----------------------------
        /// 1，方法体分为三大部分: 发送前检查\5*5算法\发送后的业务处理.
        /// 2, 详细请参考代码体上的说明.
        /// 3, 发送后可以直接获取它的

        /// 导入bpmn2.0
        public string Imp_DoneBPMN()
        ...
            Flow flow = BP.WF.Template.TemplateGlo.NewFlowByBPMN(FK_FlowSort, filePath);

// 
const handler = new HttpHandler('BP.WF.HttpHandler.WF_MyFlow');
handler.AddPara('WorkID', workID);
const data = await handler.DoMethod('MyFlow_Init');

HttpHandler (WF_MyFlow, WF_WorkOpt, WF_Comm...)
    ↓
Dev2Interface (对外 SDK：Flow_*, Node_*, Port_*, DB_*)
    ↓
WorkNode.NodeSend() / WorkUnSend / FindWorker
    ↓
GenerWorkFlow / GenerWorkerList (持久化)
    ↓
WF_GenerWorkFlow / WF_GenerWorkerList (数据库)

是否需要完整 BPM/OA 产品（表单+组织+权限）？
├── 是 → 该平台 BPM 优先考虑
│   ├── 仅嵌入现有系统 → 中间件模式 + Dev2Interface/Toolkit SDK
│   └── 独立业务系统 → BPM 模式 + 四大运行模式选型
└── 否 → 仅需流程引擎
    ├── 强依赖 BPMN 标准 / 微服务编排 → Flowable 或 Camunda
    ├── 超高吞吐、云原生 → Camunda 8 (Zeebe)
    └── Spring 生态、国内案例多 → Flowable