public void Remove(string key)
{
var logger = SharePointServiceLocator.GetCurrent().GetInstance <ILogger>();
rrLock.EnterWriteLock();
try
{
//intentionally nested, both cases getting a write lock, is safe and ensures no race.
//Force the reload of the persisted object, which minimizes chances of a failure due
// to a concurrency failure.
Reset();
WebAppSettingStore store = GetWriteSettingStore();
if (store.Settings.ContainsKey(key))
{
store.Settings.Remove(key);
store.Update();
}
}
catch (SPUpdatedConcurrencyException)
{
Reset();
throw;
}
finally
{
rrLock.ExitWriteLock();
}
}
/// <summary>
/// Gets or sets a value based on the key. If the value is not defined in this PropertyBag, it will look in it's
/// parent property bag.
/// </summary>
/// <value></value>
/// <returns>The config value defined in the property bag. </returns>
public string this[string key]
{
[SharePointPermission(SecurityAction.InheritanceDemand, ObjectModel = true)]
[SharePointPermission(SecurityAction.LinkDemand, ObjectModel = true)]
get
{
WebAppSettingStore store = GetSettingStore();
if (store == null) //store doesn't exist, so setting doesn't exist...
{
return(null);
}
rrLock.EnterReadLock();
try
{
if (!store.Settings.ContainsKey(key))
{
return(null);
}
return(store.Settings[key]);
}
finally
{
rrLock.ExitReadLock();
}
}
[SharePointPermission(SecurityAction.InheritanceDemand, ObjectModel = true)]
[SharePointPermission(SecurityAction.LinkDemand, ObjectModel = true)]
set
{
rrLock.EnterWriteLock();
try
{
//intentionally nested, Reset is also getting a write lock, is safe and ensures no race.
//Force the reload of the persisted object, which minimizes chances of a failure due
// to a concurrency failure.
Reset();
WebAppSettingStore store = GetWriteSettingStore();
store.Settings[key] = value;
store.Update();
}
catch (SPUpdatedConcurrencyException)
{
Reset();
throw;
}
finally
{
rrLock.ExitWriteLock();
}
}
}