Improve locking logic in SyncPlay manager
This commit is contained in:
Ionut Andrei Oanca
parent
a3ca36cb54
commit
426e258f1f
|
|
@ -54,10 +54,15 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
new Dictionary<Guid, IGroupController>();
|
||||
|
||||
/// <summary>
|
||||
/// Lock used for accesing any group.
|
||||
/// Lock used for accesing the list of groups.
|
||||
/// </summary>
|
||||
private readonly object _groupsLock = new object();
|
||||
|
||||
/// <summary>
|
||||
/// Lock used for accesing the session-to-group map.
|
||||
/// </summary>
|
||||
private readonly object _mapsLock = new object();
|
||||
|
||||
private bool _disposed = false;
|
||||
|
||||
/// <summary>
|
||||
|
|
@ -97,18 +102,24 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
return;
|
||||
}
|
||||
|
||||
// Locking required to access list of groups.
|
||||
lock (_groupsLock)
|
||||
{
|
||||
if (IsSessionInGroup(session))
|
||||
// Locking required as session-to-group map will be edited.
|
||||
// Locking the group is not required as it is not visible yet.
|
||||
lock (_mapsLock)
|
||||
{
|
||||
LeaveGroup(session, cancellationToken);
|
||||
if (IsSessionInGroup(session))
|
||||
{
|
||||
LeaveGroup(session, cancellationToken);
|
||||
}
|
||||
|
||||
var group = new GroupController(_loggerFactory, _userManager, _sessionManager, _libraryManager);
|
||||
_groups[group.GroupId] = group;
|
||||
|
||||
AddSessionToGroup(session, group);
|
||||
group.CreateGroup(session, request, cancellationToken);
|
||||
}
|
||||
|
||||
var group = new GroupController(_loggerFactory, _userManager, _sessionManager, _libraryManager);
|
||||
_groups[group.GroupId] = group;
|
||||
|
||||
AddSessionToGroup(session, group);
|
||||
group.CreateGroup(session, request, cancellationToken);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -123,6 +134,7 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
|
||||
var user = _userManager.GetUserById(session.UserId);
|
||||
|
||||
// Locking required to access list of groups.
|
||||
lock (_groupsLock)
|
||||
{
|
||||
_groups.TryGetValue(groupId, out IGroupController group);
|
||||
|
|
@ -136,28 +148,36 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
return;
|
||||
}
|
||||
|
||||
if (!group.HasAccessToPlayQueue(user))
|
||||
// Locking required as session-to-group map will be edited.
|
||||
lock (_mapsLock)
|
||||
{
|
||||
_logger.LogWarning("Session {SessionId} tried to join group {GroupId} but does not have access to some content of the playing queue.", session.Id, group.GroupId.ToString());
|
||||
|
||||
var error = new GroupUpdate<string>(group.GroupId, GroupUpdateType.LibraryAccessDenied, string.Empty);
|
||||
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
|
||||
return;
|
||||
}
|
||||
|
||||
if (IsSessionInGroup(session))
|
||||
{
|
||||
if (GetSessionGroup(session).Equals(groupId))
|
||||
// Group lock required to let other requests end first.
|
||||
lock (group)
|
||||
{
|
||||
group.SessionRestore(session, request, cancellationToken);
|
||||
return;
|
||||
if (!group.HasAccessToPlayQueue(user))
|
||||
{
|
||||
_logger.LogWarning("Session {SessionId} tried to join group {GroupId} but does not have access to some content of the playing queue.", session.Id, group.GroupId.ToString());
|
||||
|
||||
var error = new GroupUpdate<string>(group.GroupId, GroupUpdateType.LibraryAccessDenied, string.Empty);
|
||||
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
|
||||
return;
|
||||
}
|
||||
|
||||
if (IsSessionInGroup(session))
|
||||
{
|
||||
if (FindJoinedGroupId(session).Equals(groupId))
|
||||
{
|
||||
group.SessionRestore(session, request, cancellationToken);
|
||||
return;
|
||||
}
|
||||
|
||||
LeaveGroup(session, cancellationToken);
|
||||
}
|
||||
|
||||
AddSessionToGroup(session, group);
|
||||
group.SessionJoin(session, request, cancellationToken);
|
||||
}
|
||||
|
||||
LeaveGroup(session, cancellationToken);
|
||||
}
|
||||
|
||||
AddSessionToGroup(session, group);
|
||||
group.SessionJoin(session, request, cancellationToken);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -170,27 +190,34 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
return;
|
||||
}
|
||||
|
||||
// TODO: determine what happens to users that are in a group and get their permissions revoked.
|
||||
// Locking required to access list of groups.
|
||||
lock (_groupsLock)
|
||||
{
|
||||
_sessionToGroupMap.TryGetValue(session.Id, out var group);
|
||||
|
||||
if (group == null)
|
||||
// Locking required as session-to-group map will be edited.
|
||||
lock (_mapsLock)
|
||||
{
|
||||
_logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
|
||||
var group = FindJoinedGroup(session);
|
||||
if (group == null)
|
||||
{
|
||||
_logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
|
||||
|
||||
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
|
||||
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
|
||||
return;
|
||||
}
|
||||
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
|
||||
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
|
||||
return;
|
||||
}
|
||||
|
||||
RemoveSessionFromGroup(session, group);
|
||||
group.SessionLeave(session, cancellationToken);
|
||||
// Group lock required to let other requests end first.
|
||||
lock (group)
|
||||
{
|
||||
RemoveSessionFromGroup(session, group);
|
||||
group.SessionLeave(session, cancellationToken);
|
||||
|
||||
if (group.IsGroupEmpty())
|
||||
{
|
||||
_logger.LogInformation("Group {GroupId} is empty, removing it.", group.GroupId);
|
||||
_groups.Remove(group.GroupId, out _);
|
||||
if (group.IsGroupEmpty())
|
||||
{
|
||||
_logger.LogInformation("Group {GroupId} is empty, removing it.", group.GroupId);
|
||||
_groups.Remove(group.GroupId, out _);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -205,15 +232,25 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
}
|
||||
|
||||
var user = _userManager.GetUserById(session.UserId);
|
||||
List<GroupInfoDto> list = new List<GroupInfoDto>();
|
||||
|
||||
// Locking required to access list of groups.
|
||||
lock (_groupsLock)
|
||||
{
|
||||
return _groups
|
||||
.Values
|
||||
.Where(group => group.HasAccessToPlayQueue(user))
|
||||
.Select(group => group.GetInfo())
|
||||
.ToList();
|
||||
foreach (var group in _groups.Values)
|
||||
{
|
||||
// Locking required as group is not thread-safe.
|
||||
lock (group)
|
||||
{
|
||||
if (group.HasAccessToPlayQueue(user))
|
||||
{
|
||||
list.Add(group.GetInfo());
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return list;
|
||||
}
|
||||
|
||||
/// <inheritdoc />
|
||||
|
|
@ -225,19 +262,19 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
return;
|
||||
}
|
||||
|
||||
lock (_groupsLock)
|
||||
var group = FindJoinedGroup(session);
|
||||
if (group == null)
|
||||
{
|
||||
_sessionToGroupMap.TryGetValue(session.Id, out var group);
|
||||
_logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
|
||||
|
||||
if (group == null)
|
||||
{
|
||||
_logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
|
||||
|
||||
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
|
||||
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
|
||||
return;
|
||||
}
|
||||
var error = new GroupUpdate<string>(Guid.Empty, GroupUpdateType.NotInGroup, string.Empty);
|
||||
_sessionManager.SendSyncPlayGroupUpdate(session, error, CancellationToken.None);
|
||||
return;
|
||||
}
|
||||
|
||||
// Group lock required as GroupController is not thread-safe.
|
||||
lock (group)
|
||||
{
|
||||
group.HandleRequest(session, request, cancellationToken);
|
||||
}
|
||||
}
|
||||
|
|
@ -260,52 +297,57 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
private void OnSessionManagerSessionStarted(object sender, SessionEventArgs e)
|
||||
{
|
||||
var session = e.SessionInfo;
|
||||
lock (_groupsLock)
|
||||
{
|
||||
if (!IsSessionInGroup(session))
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
var groupId = GetSessionGroup(session);
|
||||
var request = new JoinGroupRequest(groupId);
|
||||
JoinGroup(session, groupId, request, CancellationToken.None);
|
||||
Guid groupId = FindJoinedGroupId(session);
|
||||
if (groupId.Equals(Guid.Empty))
|
||||
{
|
||||
return;
|
||||
}
|
||||
|
||||
var request = new JoinGroupRequest(groupId);
|
||||
JoinGroup(session, groupId, request, CancellationToken.None);
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Checks if a given session has joined a group.
|
||||
/// </summary>
|
||||
/// <remarks>
|
||||
/// Not thread-safe, call only under groups-lock.
|
||||
/// </remarks>
|
||||
/// <param name="session">The session.</param>
|
||||
/// <returns><c>true</c> if the session has joined a group, <c>false</c> otherwise.</returns>
|
||||
private bool IsSessionInGroup(SessionInfo session)
|
||||
{
|
||||
return _sessionToGroupMap.ContainsKey(session.Id);
|
||||
lock (_mapsLock)
|
||||
{
|
||||
return _sessionToGroupMap.ContainsKey(session.Id);
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets the group joined by the given session, if any.
|
||||
/// </summary>
|
||||
/// <remarks>
|
||||
/// Not thread-safe, call only under groups-lock.
|
||||
/// </remarks>
|
||||
/// <param name="session">The session.</param>
|
||||
/// <returns>The group.</returns>
|
||||
private IGroupController FindJoinedGroup(SessionInfo session)
|
||||
{
|
||||
lock (_mapsLock)
|
||||
{
|
||||
_sessionToGroupMap.TryGetValue(session.Id, out var group);
|
||||
return group;
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Gets the group identifier joined by the given session, if any.
|
||||
/// </summary>
|
||||
/// <param name="session">The session.</param>
|
||||
/// <returns>The group identifier if the session has joined a group, an empty identifier otherwise.</returns>
|
||||
private Guid GetSessionGroup(SessionInfo session)
|
||||
private Guid FindJoinedGroupId(SessionInfo session)
|
||||
{
|
||||
_sessionToGroupMap.TryGetValue(session.Id, out var group);
|
||||
return group?.GroupId ?? Guid.Empty;
|
||||
return FindJoinedGroup(session)?.GroupId ?? Guid.Empty;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Maps a session to a group.
|
||||
/// </summary>
|
||||
/// <remarks>
|
||||
/// Not thread-safe, call only under groups-lock.
|
||||
/// </remarks>
|
||||
/// <param name="session">The session.</param>
|
||||
/// <param name="group">The group.</param>
|
||||
/// <exception cref="InvalidOperationException">Thrown when the user is in another group already.</exception>
|
||||
|
|
@ -316,20 +358,20 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
throw new InvalidOperationException("Session is null!");
|
||||
}
|
||||
|
||||
if (IsSessionInGroup(session))
|
||||
lock (_mapsLock)
|
||||
{
|
||||
throw new InvalidOperationException("Session in other group already!");
|
||||
}
|
||||
if (IsSessionInGroup(session))
|
||||
{
|
||||
throw new InvalidOperationException("Session in other group already!");
|
||||
}
|
||||
|
||||
_sessionToGroupMap[session.Id] = group ?? throw new InvalidOperationException("Group is null!");
|
||||
_sessionToGroupMap[session.Id] = group ?? throw new InvalidOperationException("Group is null!");
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// Unmaps a session from a group.
|
||||
/// </summary>
|
||||
/// <remarks>
|
||||
/// Not thread-safe, call only under groups-lock.
|
||||
/// </remarks>
|
||||
/// <param name="session">The session.</param>
|
||||
/// <param name="group">The group.</param>
|
||||
/// <exception cref="InvalidOperationException">Thrown when the user is not found in the specified group.</exception>
|
||||
|
|
@ -345,15 +387,18 @@ namespace Emby.Server.Implementations.SyncPlay
|
|||
throw new InvalidOperationException("Group is null!");
|
||||
}
|
||||
|
||||
if (!IsSessionInGroup(session))
|
||||
lock (_mapsLock)
|
||||
{
|
||||
throw new InvalidOperationException("Session not in any group!");
|
||||
}
|
||||
if (!IsSessionInGroup(session))
|
||||
{
|
||||
throw new InvalidOperationException("Session not in any group!");
|
||||
}
|
||||
|
||||
_sessionToGroupMap.Remove(session.Id, out var tempGroup);
|
||||
if (!tempGroup.GroupId.Equals(group.GroupId))
|
||||
{
|
||||
throw new InvalidOperationException("Session was in wrong group!");
|
||||
_sessionToGroupMap.Remove(session.Id, out var tempGroup);
|
||||
if (!tempGroup.GroupId.Equals(group.GroupId))
|
||||
{
|
||||
throw new InvalidOperationException("Session was in wrong group!");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user