WorkflowInstance.cs :  » 2.6.4-mono-.net-core » System.Workflow » System » Workflow » Runtime » C# / CSharp Open Source

// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Authors:
//
//  Copyright (C) 2006 Jordi Mas i Hernandez <jordimash@gmail.com>
//

using System;
using System.ComponentModel;
using System.Workflow.ComponentModel;
using System.Workflow.Runtime.Hosting;
using System.Threading;

namespace System.Workflow.Runtime{
  public sealed class WorkflowInstance
  {
    private Guid guid;
    private WorkflowRuntime runtime;
    private Activity root_activity;
    private TimerEventSubscriptionCollection subscription_collection;
    private WorkflowQueuingService queuing_service;
    internal Timer timer_subscriptions;

    internal WorkflowInstance (Guid guid, WorkflowRuntime runtime, Activity root_activity)
    {
      this.guid = guid;
      this.runtime = runtime;
      this.root_activity = root_activity;
      subscription_collection = new TimerEventSubscriptionCollection ();
      queuing_service = new WorkflowQueuingService ();
    }

    // Properties
          public Guid InstanceId {
            get {
              return guid;
            }
          }

          public WorkflowRuntime WorkflowRuntime {
            get {
              return runtime;
            }
          }

    // TODO: This breaks .Net API signature compatibility
          public TimerEventSubscriptionCollection TimerEventSubscriptionCollection {
            get {
              return subscription_collection;
            }
          }

          // TODO: This breaks .Net API signature compatibility
          public WorkflowQueuingService WorkflowQueuingService {
            get {
              return queuing_service;
            }
          }

    // Methods
    public void Abort ()
    {
      timer_subscriptions.Dispose ();
    }

    //public void ApplyWorkflowChanges (WorkflowChanges workflowChanges);

    public void EnqueueItem (IComparable queueName, object item, IPendingWork pendingWork, object workItem)
    {
      WorkflowQueue queue;

      // TODO: What to do with pendingWork and workItem?
      if (queuing_service.Exists (queueName)) {
        queue = queuing_service.GetWorkflowQueue (queueName);
      } else {
        queue = queuing_service.CreateWorkflowQueue (queueName, true);
      }

      queue.Enqueue (item);
    }

    public void EnqueueItemOnIdle (IComparable queueName, object item, IPendingWork pendingWork, object workItem)
    {

    }

    public override bool Equals (object obj)
    {
      WorkflowInstance wi = (WorkflowInstance) obj;

      if (wi == null) {
        return false;
      }

      return wi.InstanceId.Equals (guid);
    }

    public override int GetHashCode ()
    {
      return guid.GetHashCode ();
    }

    public Activity GetWorkflowDefinition ()
    {
      return root_activity;
    }

    public DateTime GetWorkflowNextTimerExpiration ()
    {
      TimerEventSubscription timer;
      timer = subscription_collection.Peek ();

      if (timer == null) {
        return DateTime.MaxValue;
      }

      return timer.ExpiresAt;
    }

    /*public ReadOnlyCollection<WorkflowQueueInfo> GetWorkflowQueueData();*/
    public void Load ()
    {

    }

    public void ReloadTrackingProfiles ()
    {

    }

    public void Resume ()
    {

    }

    public void Start ()
    {
      WorkflowSchedulerService sheduler;

      // init all activities
      ActivityExecutionContextManager manager = new ActivityExecutionContextManager (this);
      ActivityExecutionContext context = manager.CreateExecutionContext (GetWorkflowDefinition ());

      GetWorkflowDefinition ().InitializeInternal (context);

      sheduler = (WorkflowSchedulerService) runtime.GetService (typeof (WorkflowSchedulerService));
      //sheduler.Schedule (new WaitCallback (WorkflowProcessor.RunWorkflow), guid);

      WorkflowProcessor.RunWorkflow (guid);
    }

    public void Suspend (string error)
    {

    }

    public void Terminate (string error)
    {

    }

    public bool TryUnload ()
    {
      throw new NotImplementedException ();
    }

    public void Unload ()
    {

    }
  }
}