private void ProcessTaskStatusChanged(WorkflowStatus status, WorkflowTask task)
{
task.Properties[WorkflowProperties.WP_STATUS] = status;
if (this.TaskStatusChanged != null)
{
this.TaskStatusChanged(this, status, task);
}
}
/// <summary>
/// 执行一个任务
/// </summary>
/// <param name="taskDef">要执行的任务信息</param>
/// <param name="output">任务的输出参数</param>
/// <returns></returns>
private bool ExecuteTask(TaskDefinition taskDef)
{
WorkflowTask task = null;
bool initialized = false;
int rc = DotNETCode.SUCCESS;
try
{
task = this.ModuleFactory.CreateInstance <WorkflowTask>(taskDef);
// 如果Task有Disabled标记，那么跳过运行
if (taskDef.HasFlag(ModuleFlags.Disabled))
{
this.ProcessTaskStatusChanged(WorkflowStatus.SKIP, task);
logger.InfoFormat("{0}未启用, 跳过", taskDef.Name);
return(true);
}
// 延时运行
if (taskDef.Delay > 0)
{
logger.InfoFormat("延时{0}秒运行{1}", (double)taskDef.Delay / (double)1000, taskDef.Name);
this.ProcessTaskStatusChanged(WorkflowStatus.WAIT, task);
Thread.Sleep(taskDef.Delay);
}
logger.InfoFormat("开始运行:{0}", taskDef.Name);
this.ProcessTaskStatusChanged(WorkflowStatus.RUN, task);
// 解析参数表达式
IDictionary inputParams;
if ((inputParams = ExpressionUtility.EvaluateExpressions(taskDef.InputParameters, this.EvaluationContext)) == null)
{
this.ProcessTaskStatusChanged(WorkflowStatus.FAIL, task);
logger.ErrorFormat("计算输入参数表达式失败, 运行任务失败, code = {0}, {1}", rc, DotNETCode.GetMessage(rc));
return(false);
}
if ((rc = task.Initialize(inputParams)) != DotNETCode.SUCCESS)
{
this.ProcessTaskStatusChanged(WorkflowStatus.FAIL, task);
logger.ErrorFormat("初始化{0}失败, code = {1}, {2}", taskDef.Name, rc, DotNETCode.GetMessage(rc));
return(false);
}
initialized = true;
if ((rc = task.Run()) != DotNETCode.SUCCESS)
{
this.ProcessTaskStatusChanged(WorkflowStatus.FAIL, task);
logger.ErrorFormat("运行{0}失败, code = {1}, {2}", taskDef.Name, rc, DotNETCode.GetMessage(rc));
return(false);
}
this.ProcessTaskStatusChanged(WorkflowStatus.PASS, task);
logger.InfoFormat("运行{0}成功", taskDef.Name);
return(true);
}
catch (Exception ex)
{
logger.Error(string.Format("{0}出现异常", taskDef.Name), ex);
if (taskDef.HasFlag((int)TaskFlags.IgnoreFailure))
{
logger.WarnFormat("{0}运行出现异常, 执行下一个流程", taskDef.Name);
}
else
{
logger.WarnFormat("{0}运行出现异常, 退出", taskDef.Name);
}
this.ProcessTaskStatusChanged(WorkflowStatus.EXCEPTION, task);
return(false);
}
finally
{
if (task != null)
{
// 保存输出参数，供其他的任务解析输入表达式使用
this.taskProperties[task.ID] = task.Properties;
if (initialized)
{
task.Reset();
}
}
}
}