//Private
#region 获取持久化模式 —— static InstanceCompletionAction GetInstanceCompletionAction()
/// <summary>
/// 获取持久化模式
/// </summary>
/// <returns>持久化模式</returns>
private static InstanceCompletionAction GetInstanceCompletionAction()
{
PersistenceMode persistenceMode = WorkflowExtension.GetPersistenceMode();
int enumValue = (int)persistenceMode;
InstanceCompletionAction instanceCompletionAction = (InstanceCompletionAction)enumValue;
return(instanceCompletionAction);
}
/// <summary>
/// 创建工作流应用程序代理构造器
/// </summary>
/// <param name="workflowDefinition">工作流定义</param>
/// <param name="parameters">参数字典</param>
/// <param name="definitionIdentity">工作流定义标识</param>
public WorkflowApplicationProxy(Activity workflowDefinition, IDictionary <string, object> parameters = null, WorkflowIdentity definitionIdentity = null)
{
//创建工作流应用程序
if (workflowDefinition == null)
{
throw new ArgumentNullException(nameof(workflowDefinition), "工作流定义不可为空！");
}
if (parameters == null && definitionIdentity == null)
{
this.WorkflowApplication = new WorkflowApplication(workflowDefinition);
}
if (parameters == null && definitionIdentity != null)
{
this.WorkflowApplication = new WorkflowApplication(workflowDefinition, definitionIdentity);
}
if (parameters != null && definitionIdentity == null)
{
this.WorkflowApplication = new WorkflowApplication(workflowDefinition, parameters);
}
if (parameters != null && definitionIdentity != null)
{
this.WorkflowApplication = new WorkflowApplication(workflowDefinition, parameters, definitionIdentity);
}
//设置工作流持久化存储
InstanceCompletionAction instanceCompletionAction = GetInstanceCompletionAction();
SqlWorkflowInstanceStore instanceStore = new SqlWorkflowInstanceStore()
{
ConnectionString = _WorkflowPersistenceConnectionString,
InstanceCompletionAction = instanceCompletionAction
};
this.WorkflowApplication.InstanceStore = instanceStore;
//设置空闲时卸载持久化
this.WorkflowApplication.PersistableIdle = eventArgs =>
{
//只有书签才持久化
if (eventArgs.Bookmarks.Any())
{
return(PersistableIdleAction.Unload);
}
return(PersistableIdleAction.None);
};
//设置书签卸载事件
this.WorkflowApplication.Idle = eventArgs =>
{
if (eventArgs.Bookmarks.Any())
{
string[] bookmarkNames = eventArgs.Bookmarks.Select(x => x.BookmarkName).ToArray();
this.BookmarksUnloadedEvent?.Invoke(this.WorkflowApplication.Id, bookmarkNames, eventArgs);
}
};
//设置工作流实例完成事件
this.WorkflowApplication.Completed = eventArgs =>
{
this.CompletedEvent?.Invoke(this.WorkflowApplication.Id, eventArgs);
};
//异常处理
this.WorkflowApplication.OnUnhandledException = eventArgs =>
{
if (eventArgs.ExceptionSource is BookmarkActivity bookmarkActivity)
{
//设置书签异常事件
Guid workflowInstanceId = this.WorkflowApplication.Id;
string bookmarkName = bookmarkActivity.GetType().FullName;
Exception unhandledException = eventArgs.UnhandledException;
this.BookmarkExceptionEvent?.Invoke(workflowInstanceId, bookmarkName, unhandledException, eventArgs);
}
//记录日志
LogException(eventArgs);
//中止工作流
return(UnhandledExceptionAction.Abort);
};
}
