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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="IQueueProcessor.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// The Queue Processor
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrake.ApplicationServices.Services.Interfaces
{
using System;
using System.ComponentModel;
using HandBrake.ApplicationServices.Model;
/// <summary>
/// The Queue Processor
/// </summary>
public interface IQueueProcessor
{
#region Events
/// <summary>
/// Fires when the Queue has started
/// </summary>
event QueueProcessor.QueueProgressStatus JobProcessingStarted;
/// <summary>
/// Fires when a job is Added, Removed or Re-Ordered.
/// Should be used for triggering an update of the Queue Window.
/// </summary>
event EventHandler QueueChanged;
/// <summary>
/// Fires when the entire encode queue has completed.
/// </summary>
event QueueProcessor.QueueCompletedEventDelegate QueueCompleted;
/// <summary>
/// Fires when a pause to the encode queue has been requested.
/// </summary>
event EventHandler QueuePaused;
#endregion
#region Properties
/// <summary>
/// Gets the number of jobs in the queue
/// </summary>
int Count { get; }
/// <summary>
/// Gets the IEncodeService instance.
/// </summary>
IEncodeServiceWrapper EncodeService { get; }
/// <summary>
/// Gets a value indicating whether IsProcessing.
/// </summary>
bool IsProcessing { get; }
/// <summary>
/// Gets or sets Last Processed Job.
/// This is set when the job is poped of the queue by GetNextJobForProcessing();
/// </summary>
QueueTask LastProcessedJob { get; set; }
/// <summary>
/// Gets The current queue.
/// </summary>
BindingList<QueueTask> Queue { get; }
#endregion
#region Public Methods
/// <summary>
/// Add a job to the Queue.
/// This method is Thread Safe.
/// </summary>
/// <param name="job">
/// The encode Job object.
/// </param>
void Add(QueueTask job);
/// <summary>
/// Backup any changes to the queue file
/// </summary>
/// <param name="exportPath">
/// If this is not null or empty, this will be used instead of the standard backup location.
/// </param>
void BackupQueue(string exportPath);
/// <summary>
/// Checks the current queue for an existing instance of the specified destination.
/// </summary>
/// <param name="destination">
/// The destination of the encode.
/// </param>
/// <returns>
/// Whether or not the supplied destination is already in the queue.
/// </returns>
bool CheckForDestinationPathDuplicates(string destination);
/// <summary>
/// Clear down all Queue Items
/// </summary>
void Clear();
/// <summary>
/// Clear down the Queue�s completed items
/// </summary>
void ClearCompleted();
/// <summary>
/// Get the first job on the queue for processing.
/// This also removes the job from the Queue and sets the LastProcessedJob
/// </summary>
/// <returns>
/// An encode Job object.
/// </returns>
QueueTask GetNextJobForProcessing();
/// <summary>
/// Moves an item down one position in the queue.
/// </summary>
/// <param name="index">
/// The zero-based location of the job in the queue.
/// </param>
void MoveDown(int index);
/// <summary>
/// Moves an item up one position in the queue.
/// </summary>
/// <param name="index">
/// The zero-based location of the job in the queue.
/// </param>
void MoveUp(int index);
/// <summary>
/// Requests a pause of the encode queue.
/// </summary>
void Pause();
/// <summary>
/// Remove a job from the Queue.
/// This method is Thread Safe
/// </summary>
/// <param name="job">
/// The job.
/// </param>
void Remove(QueueTask job);
/// <summary>
/// Reset a Queued Item from Error or Completed to Waiting
/// </summary>
/// <param name="job">
/// The job.
/// </param>
void ResetJobStatusToWaiting(QueueTask job);
/// <summary>
/// Restore a Queue from file or from the queue backup file.
/// </summary>
/// <param name="importPath">
/// The import path. String.Empty or null will result in the default file being loaded.
/// </param>
void RestoreQueue(string importPath);
/// <summary>
/// Starts encoding the first job in the queue and continues encoding until all jobs
/// have been encoded.
/// </summary>
/// <param name="clearCompleted">
/// The clear Completed.
/// </param>
void Start(bool clearCompleted);
#endregion
}
}
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