/// <summary>
/// Saves a continuation point used for historical reads.
/// </summary>
/// <param name="id">The identifier for the continuation point.</param>
/// <param name="continuationPoint">The continuation point.</param>
/// <remarks>
/// If the continuationPoint implements IDisposable it will be disposed when
/// the Session is closed or discarded.
/// </remarks>
public void SaveHistoryContinuationPoint(Guid id, object continuationPoint)
{
if (continuationPoint == null)
{
throw new ArgumentNullException("continuationPoint");
}
lock (m_lock)
{
if (m_historyContinuationPoints == null)
{
m_historyContinuationPoints = new List <HistoryContinuationPoint>();
}
// remove existing continuation point if space needed.
while (m_historyContinuationPoints.Count >= m_maxHistoryContinuationPoints)
{
HistoryContinuationPoint oldCP = m_historyContinuationPoints[0];
m_historyContinuationPoints.RemoveAt(0);
Utils.SilentDispose(oldCP.Value);
}
// create the cp.
HistoryContinuationPoint cp = new HistoryContinuationPoint();
cp.Id = id;
cp.Value = continuationPoint;
cp.Timestamp = DateTime.UtcNow;
m_historyContinuationPoints.Add(cp);
}
}
/// <summary>
/// Restores a previously saves history continuation point.
/// </summary>
/// <param name="continuationPoint">The identifier for the continuation point.</param>
/// <returns>The save continuation point. null if not found.</returns>
public object RestoreHistoryContinuationPoint(byte[] continuationPoint)
{
lock (m_lock)
{
if (m_historyContinuationPoints == null)
{
return(null);
}
if (continuationPoint == null || continuationPoint.Length != 16)
{
return(null);
}
Guid id = new Guid(continuationPoint);
for (int ii = 0; ii < m_historyContinuationPoints.Count; ii++)
{
HistoryContinuationPoint cp = m_historyContinuationPoints[ii];
if (cp.Id == id)
{
m_historyContinuationPoints.RemoveAt(ii);
return(cp.Value);
}
}
return(null);
}
}
/// <summary>
/// Saves a continuation point used for historical reads.
/// </summary>
/// <param name="id">The identifier for the continuation point.</param>
/// <param name="continuationPoint">The continuation point.</param>
/// <remarks>
/// If the continuationPoint implements IDisposable it will be disposed when
/// the Session is closed or discarded.
/// </remarks>
public void SaveHistoryContinuationPoint(Guid id, object continuationPoint)
{
if (continuationPoint == null) throw new ArgumentNullException("continuationPoint");
lock (m_lock)
{
if (m_historyContinuationPoints == null)
{
m_historyContinuationPoints = new List<HistoryContinuationPoint>();
}
// remove existing continuation point if space needed.
while (m_historyContinuationPoints.Count >= m_maxHistoryContinuationPoints)
{
HistoryContinuationPoint oldCP = m_historyContinuationPoints[0];
m_historyContinuationPoints.RemoveAt(0);
Utils.SilentDispose(oldCP.Value);
}
// create the cp.
HistoryContinuationPoint cp = new HistoryContinuationPoint();
cp.Id = id;
cp.Value = continuationPoint;
cp.Timestamp = DateTime.UtcNow;
m_historyContinuationPoints.Add(cp);
}
}
