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Code Issues Actions 8 Packages Projects Releases Wiki Activity

Address requested changes from review

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This commit is contained in:
Ionut Andrei Oanca
2020-11-30 10:03:42 +01:00
parent 78ea8ef99e
commit b57ace7888
2 changed files with 48 additions and 47 deletions
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75
Emby.Server.Implementations/SyncPlay/SyncPlayManager.cs
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@@ -56,11 +56,17 @@ namespace Emby.Server.Implementations.SyncPlay
/// <summary>
/// Lock used for accessing any group.
/// </summary>
/// <remarks>
/// Always lock before <see cref="_mapsLock"/> and before locking on any <see cref="IGroupController"/>.
/// </remarks>
private readonly object _groupsLock = new object();
/// <summary>
/// Lock used for accessing the session-to-group map.
/// </summary>
/// <remarks>
/// Always lock after <see cref="_groupsLock"/> and before locking on any <see cref="IGroupController"/>.
/// </remarks>
private readonly object _mapsLock = new object();
private bool _disposed = false;
@@ -259,7 +265,12 @@ namespace Emby.Server.Implementations.SyncPlay
return;
}
var group = FindJoinedGroup(session);
IGroupController group;
lock (_mapsLock)
{
group = FindJoinedGroup(session);
}
if (group == null)
{
_logger.LogWarning("Session {SessionId} does not belong to any group.", session.Id);
@@ -295,7 +306,12 @@ namespace Emby.Server.Implementations.SyncPlay
{
var session = e.SessionInfo;
Guid groupId = FindJoinedGroupId(session);
Guid groupId = Guid.Empty;
lock (_mapsLock)
{
groupId = FindJoinedGroupId(session);
}
if (groupId.Equals(Guid.Empty))
{
return;
@@ -308,33 +324,36 @@ namespace Emby.Server.Implementations.SyncPlay
/// <summary>
/// Checks if a given session has joined a group.
/// </summary>
/// <remarks>
/// Method is not thread-safe, external locking on <see cref="_mapsLock"/> is required.
/// </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)
{
lock (_mapsLock)
{
return _sessionToGroupMap.ContainsKey(session.Id);
}
return _sessionToGroupMap.ContainsKey(session.Id);
}
/// <summary>
/// Gets the group joined by the given session, if any.
/// </summary>
/// <remarks>
/// Method is not thread-safe, external locking on <see cref="_mapsLock"/> is required.
/// </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;
}
_sessionToGroupMap.TryGetValue(session.Id, out var group);
return group;
}
/// <summary>
/// Gets the group identifier joined by the given session, if any.
/// </summary>
/// <remarks>
/// Method is not thread-safe, external locking on <see cref="_mapsLock"/> is required.
/// </remarks>
/// <param name="session">The session.</param>
/// <returns>The group identifier if the session has joined a group, an empty identifier otherwise.</returns>
private Guid FindJoinedGroupId(SessionInfo session)
@@ -345,6 +364,9 @@ namespace Emby.Server.Implementations.SyncPlay
/// <summary>
/// Maps a session to a group.
/// </summary>
/// <remarks>
/// Method is not thread-safe, external locking on <see cref="_mapsLock"/> is required.
/// </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>
@@ -355,20 +377,20 @@ namespace Emby.Server.Implementations.SyncPlay
throw new InvalidOperationException("Session is null!");
}
lock (_mapsLock)
if (IsSessionInGroup(session))
{
if (IsSessionInGroup(session))
{
throw new InvalidOperationException("Session in other group already!");
}
_sessionToGroupMap[session.Id] = group ?? throw new InvalidOperationException("Group is null!");
throw new InvalidOperationException("Session in other group already!");
}
_sessionToGroupMap[session.Id] = group ?? throw new InvalidOperationException("Group is null!");
}
/// <summary>
/// Unmaps a session from a group.
/// </summary>
/// <remarks>
/// Method is not thread-safe, external locking on <see cref="_mapsLock"/> is required.
/// </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>
@@ -384,18 +406,15 @@ namespace Emby.Server.Implementations.SyncPlay
throw new InvalidOperationException("Group is null!");
}
lock (_mapsLock)
if (!IsSessionInGroup(session))
{
if (!IsSessionInGroup(session))
{
throw new InvalidOperationException("Session not in any group!");
}
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!");
}
}