一个真正符合中国国情的工作流设计参考（包括PHP实现）
开源的工作流很少有让人满意的，即便是国内用的比较多的jbpm，用起来也会觉得很便扭。再加上PHP中没有什么好用的工作流，于是干脆自己设计一个，设计的原则如下：
1 根据80/20原则，只使用wfmc模型中最符合自身应用的20％功能
2 充分吸收国内使用jbpm开发BOSS中遇到的问题，工作流引擎只负责参数的收集和流程的流转，具体和业务的控制，交给每个流程定制的控制类去实现。
3 表单采用简单的html+控制标签的方法实现
4 权限和模板引擎，以及其它辅助函数直接使用办公系统自带的框架
5 充分利用PHP语言的特点，流程设计是基于数据库的，程序上使用OO设计，但采用重对象的方法
6 不把可视化设计流程的工作交给最终客户，而且由设计时完成，因此不考虑流程版本更新的问题
一、工作流数据表设计
tbl_workflow_defination：工作流定义表
| defination_id |
流程id |
|
| defination_name |
流程名称 |
|
| defination_handler |
流程处理辅助文件，每个工作流一个文件 |
自定义处理文件，及其对象。例如workflow-proporsal-handler.php，其中定义对象proposal |
tbl_workflow_node：流程结点步骤表
| node_id |
结点id |
|
| defination_id |
流程id |
|
| node_index |
结点序号 |
结点的step |
| node_name |
结点名称 |
|
| node_type |
结点类型 |
1人为决策，2自动处理(直接执行execute_function)，3等待外部响应(例如外部WS触发),4分支，5汇总 6结束结点（此结点执行时候自动终止进程） |
| init_function |
流程初始函数 |
|
| run_function |
流程运行函数 |
|
| save_function |
流程保存函数 |
|
| transit_function |
流程流转函数 |
|
| prev_node_index |
前结点序号 |
例如1。开始结点没有 执行前，通过此来校验一下流程 |
| next_node_index |
后结点序号 |
例如[同意]3,[不同意]4。尾结点或要结束的结点没有，若没有，直接调用end |
| executor |
执行角色，组，人 |
role[1,2] group[1,2] user[1,2],为空由运行时决定 |
| execute_type |
执行类型 |
0需所有人执行 1只需一人执行 |
| remind |
提醒 |
0不提醒 1邮件 2短信 3邮件和短信 |
| field |
可编辑的字段 |
name,content |
| max_day |
最长时间(天) |
|
tbl_workflow_process ：流程执行进程表
| process_id |
进程id |
|
| defination_id |
流程id |
|
| process_desc |
进程描述 |
显示在我的工作台中 |
| context |
上下文 |
存放上下文变量,例如业务表的id |
| current_node_index |
当前结点序号 |
|
| start_time |
流程启动时间 |
如遇分支、汇合显示为： 1＝》3,4＝》3,5＝》6 |
| finish_time |
流程完成时间 |
|
| state |
状态 |
1运行 2结束 |
| start_user |
发起人 |
发起人，用于显示自己的流程 |
tbl_workflow_thread ：流程执行线程表
| thread_id |
线程id |
|
| process_id |
进程id |
|
| process_desc |
进程描述 |
|
| node_id |
结点id |
|
| node_name |
结点名称 |
|
| executor |
执行人 |
|
| start_time |
线程生成时间 |
|
| receive_time |
线程接收时间 |
|
| finish_time |
线程完成时间 |
|
| max_time |
结点规定的最长时间 |
|
| state |
状态 |
0未接收 1已接收 2已处理 |
二、常见流程
人工决策
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外部响应
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