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工作流系统\n\n## 环境依赖\n\n+ h2\n+ redis\n+ java8+\n\n## DB设计\n\n当前先按最简单的工作流设计\n\n```h2sql\n# 过程表\nDROP TABLE IF EXISTS PROCESS;\n\nCREATE TABLE PROCESS(\n  process_id BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '过程ID',\n  process_name VARCHAR(20) NOT NULL COMMENT '过程名称',\n  process_alias VARCHAR(20) NOT NULL COMMENT '过程别名',\n  PRIMARY KEY (process_id)\n);\n\n# 过程节点表\nDROP TABLE IF EXISTS TASK;\n\nCREATE TABLE TASK(\n  task_id BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '节点（任务）ID',\n  task_name VARCHAR(20) NOT NULL COMMENT '节点（任务）名称',\n  process_id BIGINT(20) NOT NULL COMMENT '所属过程定义ID',\n  node_type int(4) NOT NULL DEFAULT 0 COMMENT '节点类型，0:默认值，1:开始节点，2:结束节点，3:任务节点）',\n  process_logic INT(4) NOT NULL DEFAULT 0 COMMENT '针对前置节点的过程逻辑属性，0:默认值，1:and合并节点，2:or合并节点',\n  role_id BIGINT(20) NOT NULL COMMENT '分配的任务角色ID，该角色可以操作此节点',\n  PRIMARY KEY (task_id)\n);\n\n# 过程实例表\nDROP TABLE IF EXISTS PROCESS_INSTANCE;\n\nCREATE TABLE PROCESS_INSTANCE(\n  process_instance_id BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '流程实例ID',\n  description VARCHAR(255) NOT NULL COMMENT '业务实例的内容描述',\n  process_id BIGINT(20) NOT NULL COMMENT '所属过程定义ID',\n  start_time TIMESTAMP NULL COMMENT '流程实例的创建时间',\n  end_time TIMESTAMP NULL COMMENT '流程实例的结束时间',\n  start_task_instance_id BIGINT(20) NOT NULL COMMENT '开始任务实例ID',\n  next_task_instance_ids VARCHAR(255) NOT NULL AUTO_INCREMENT COMMENT '后续任务实例ID，逗号分隔',\n  pre_task_instance_ids VARCHAR(255) NOT NULL AUTO_INCREMENT COMMENT '前驱任务实例ID，逗号分隔',\n  PRIMARY KEY (process_instance_id)\n);\n\n# 任务实例表\nDROP TABLE IF EXISTS TASK_INSTANCE;\n\nCREATE TABLE TASK_INSTANCE(\n  task_instance_id BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '任务实例ID',\n  task_id BIGINT(20) NOT NULL COMMENT '节点（任务）ID',\n  process_instance_id BIGINT(20) NOT NULL COMMENT '流程实例ID',\n  start_time TIMESTAMP NULL COMMENT '流程实例的创建时间',\n  end_time TIMESTAMP NULL COMMENT '流程实例的结束时间',\n  user_id BIGINT(20) NOT NULL DEFAULT 0 COMMENT '处理任务的用户ID',\n  next_task_instance_id BIGINT(20) NULL COMMENT '后续任务实例ID',\n  pre_task_instance_id BIGINT(20) NULL COMMENT '前驱任务实例ID',\n  task_state INT(4) NOT NULL DEFAULT 0 COMMENT '任务执行状态，0:默认值，1:创建完，2:任务进行中，3:任务已完成',\n  task_status INT(4) NOT NULL DEFAULT 0 COMMENT '任务审核结果，0:默认值，1:通过，2:不通过',\n  task_message VARCHAR(255) NOT NULL DEFAULT '' COMMENT '任务审核信息，通过备注或拒绝理由',\n  PRIMARY KEY (task_instance_id)\n);\n\n# 迁移表，即任务之间路由表\nDROP TABLE IF EXISTS TASK_ROUTE;\n\nCREATE TABLE TASK_ROUTE(\n  id BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '迁移ID',\n  process_id BIGINT(20) NOT NULL COMMENT '过程定义ID',\n  next_task_id BIGINT(20) NOT NULL AUTO_INCREMENT COMMENT '后续任务ID',\n  PRIMARY KEY (id)\n);\n\n# 用户和角色关系表\nDROP TABLE IF EXISTS RELATION_USER_ROLE;\n\nCREATE TABLE RELATION_USER_ROLE(\n  user_id BIGINT(20) NOT NULL DEFAULT 0 COMMENT '用户ID',\n  role_id BIGINT(20) NOT NULL COMMENT '角色ID',\n  PRIMARY KEY (user_id, role_id)\n);\n```\n\n## entity 定义规则\n+ DO（ Data Object）：与数据库表结构一一对应，通过DAO层向上传输数据源对象。\n+ DTO（ Data Transfer Object）：数据传输对象，Service或Manager向外传输的对象。\n+ BO（ Business Object）：业务对象。 由Service层输出的封装业务逻辑的对象。\n+ AO（ Application Object）：应用对象。 在Web层与Service层之间抽象的复用对象模型，极为贴近展示层，复用度不高。\n+ VO（ View Object）：显示层对象，通常是Web向模板渲染引擎层传输的对象。\n+ POJO（ Plain Ordinary Java Object）：在本手册中， POJO专指只有setter/getter/toString的简单类，包括DO/DTO/BO/VO等。\n+ Query：数据查询对象，各层接收上层的查询请求。 注意超过2个参数的查询封装，禁止使用Map类来传输。\n\n当前只使用了DO/DTO和VO\n\n## \n\n参考资料：\n\n+ https://juejin.im/post/6844904167463485453\n+ https://blog.csdn.net/chclvzxx/article/details/7991346","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcraryprimitiveman%2Fworkflow","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fcraryprimitiveman%2Fworkflow","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fcraryprimitiveman%2Fworkflow/lists"}