private void remove_item(Checked_Out_Item DeleteItem)
{
lock (thisLock)
{
itemsByCheckoutTime.Remove(DeleteItem.Check_Out_Time);
itemsByItemid.Remove(DeleteItem.ItemID);
}
}
/// <summary> Attempts to check out an item (if it was marked for checking out and single use)
/// to a particular user. If the user already has that item, it is renewed. If the item is
/// checked out to a different user, then the user fails to check it out </summary>
/// <param name="ItemID"> Primary key to the digital resource which to check out</param>
/// <param name="IP_Address"> IP Address to which to check this item </param>
/// <returns> TRUE if successful, otherwise FALSE </returns>
public bool Check_Out(int ItemID, string IP_Address)
{
// Perform this in a lock
lock (thisLock)
{
// First, always update the checkout list
Update_Check_Out_List();
if (itemsByItemid.ContainsKey(ItemID))
{
Checked_Out_Item newItem = itemsByItemid[ItemID];
if (newItem.IP_Address == IP_Address)
{
if (itemsByCheckoutTime.ContainsKey(newItem.Check_Out_Time))
{
itemsByCheckoutTime.Remove(newItem.Check_Out_Time);
}
newItem.Renew();
bool reserved = false;
while (!reserved)
{
try
{
itemsByCheckoutTime[newItem.Check_Out_Time] = newItem;
reserved = true;
}
catch
{
newItem.Renew();
}
}
return(true);
}
return(false);
}
add_new_checked_out_status(ItemID, IP_Address);
return(true);
}
}
private void add_new_checked_out_status(int ItemID, string IP_Address)
{
lock (thisLock)
{
Checked_Out_Item newItem = new Checked_Out_Item(ItemID, IP_Address);
bool reserved = false;
while (!reserved)
{
try
{
itemsByCheckoutTime[newItem.Check_Out_Time] = newItem;
reserved = true;
}
catch
{
newItem.Renew();
}
}
itemsByItemid[ItemID] = newItem;
}
}
private void remove_item(Checked_Out_Item DeleteItem)
{
lock (thisLock)
{
itemsByCheckoutTime.Remove(DeleteItem.Check_Out_Time);
itemsByItemid.Remove(DeleteItem.ItemID);
}
}
private void add_new_checked_out_status(int ItemID, string IP_Address)
{
lock (thisLock)
{
Checked_Out_Item newItem = new Checked_Out_Item(ItemID, IP_Address);
bool reserved = false;
while (!reserved)
{
try
{
itemsByCheckoutTime[newItem.Check_Out_Time] = newItem;
reserved = true;
}
catch
{
newItem.Renew();
}
}
itemsByItemid[ItemID] = newItem;
}
}