/// <summary>
/// Loads the state for a given task identifier.
/// </summary>
/// <param name="taskId">The task identifier (a GUID associated with the task).</param>
/// <returns>The state.</returns>
public static State Load(Guid taskId)
{
State state = null;
if (UIPConfiguration.Config.IsStateCacheEnabled)
{
state = StateCache.LoadFromCache(taskId);
if (state == null)
{
//State is not there in the cache, so a new state will be created here
IStatePersistence spp = StatePersistenceFactory.Create( );
state = Load(spp, taskId);
StateCache.PutStateInCache(state, false);
}
}
else
{
//The cache is disabled, so a new one is created
IStatePersistence spp = StatePersistenceFactory.Create( );
state = Load(spp, taskId);
}
return(state);
}
/// <summary>
/// Creates the default State object, loading it from the persistence provider.
/// </summary>
/// <returns>Default state instance of type specified in the configuration file.</returns>
public static State Create()
{
IStatePersistence spp = StatePersistenceFactory.Create();
ObjectTypeSettings typeSettings = UIPConfiguration.Config.DefaultState;
State state = Create(spp, typeSettings);
if (UIPConfiguration.Config.IsStateCacheEnabled)
{
StateCache.PutStateInCache(state, true);
}
return(state);
}
/// <summary>
/// Creates a State object, loading it from persistence provider.
/// </summary>
/// <param name="navigatorName">Name of the navigator.</param>
/// <returns>State instance of the type specified in the configuration file.</returns>
public static State Create(string navigatorName)
{
// Create a State persistence provider to be used by the state object
IStatePersistence spp = StatePersistenceFactory.Create(navigatorName);
ObjectTypeSettings typeSettings = UIPConfiguration.Config.GetStateSettings(navigatorName);
State state = Create(spp, typeSettings);
//Check if the cache is enabled
if (UIPConfiguration.Config.IsStateCacheEnabled)
{
StateCache.PutStateInCache(state, navigatorName, true);
}
return(state);
}
/// <summary>
/// Ends or suspends the current task.
/// </summary>
protected virtual void SuspendTask()
{
StateCache.RemoveFromCache(State.TaskId);
State.Clear();
}
/// <summary>
/// Completes the task. Completing a task permanently removes any state data for the task.
/// A completed task cannot be restarted.
/// </summary>
public virtual void CompleteTask()
{
StateCache.RemoveFromCache(State.TaskId);
State.Delete();
}
