/// <summary>
/// Invokes a given function and provides error handling and auditing in case the method causes
/// an exception.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="auditor"></param>
/// <param name="context"></param>
/// <param name="func"></param>
/// <param name="errorMessage"></param>
/// <returns></returns>
public static T SecureFunc <T>(IAuditor auditor, FileSystemTask context, Func <T> func, Func <string> errorMessage)
{
try
{
return(func());
}
// catch (FaultException<ResourceFault> e)
// {
// throw; //TODO provide implementation
// }
// catch (FaultException e)
// {
// //unwrap exception details
// throw; //TODO provide implementation
// }
// catch (CommunicationException e)
// {
// throw; //TODO provide implementation
// }
catch (VfsException e)
{
//just audit and rethrow VFS exceptions
auditor.AuditException(e, context);
throw;
}
catch (Exception e)
{
//wrap unhandled exception into VFS exception
var exception = new ResourceAccessException(errorMessage(), e);
auditor.AuditException(exception, context);
throw exception;
}
}
/// <summary>
/// Invokes a given function and provides error handling and auditing in case the method causes
/// an exception.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="auditor"></param>
/// <param name="context"></param>
/// <param name="func"></param>
/// <param name="errorMessage"></param>
/// <returns></returns>
public static T SecureFunc <T>(IAuditor auditor, FileSystemTask context, Func <T> func, Func <string> errorMessage)
{
try
{
return(func());
}
catch (VfsFaultException e)
{
//audit as warning - the error has been properly handled by the service
VfsFault fault = e.Fault;
auditor.AuditException(e, AuditLevel.Warning, context, AuditEvent.Unknown, fault.CreateFaultMessage());
//create a matching exception based on the fault type
throw fault.ToException();
}
catch (VfsException e)
{
//just audit and rethrow VFS exceptions
auditor.AuditException(e, context);
throw;
}
catch (Exception e)
{
//wrap unhandled exception into VFS exception
var exception = new ResourceAccessException(errorMessage(), e);
auditor.AuditException(exception, context);
throw exception;
}
}
/// <summary>
/// Provides exception handling and auditing for a given function.
/// </summary>
/// <param name="task">The context, used for auditing exceptions that may occur.</param>
/// <param name="action">The action to be invoked.</param>
/// <param name="errorMessage">Returns an error message in case of an unhandled exception
/// that is not derived from <see cref="VfsException"/>.</param>
/// <param name="auditor">The auditor that receives the exceptions.</param>
/// <returns>The result of the submitted <paramref name="action"/> function.</returns>
public static void SecureAction(FileSystemTask task, Action action, Func <string> errorMessage, IAuditor auditor)
{
try
{
action();
}
catch (VfsException e)
{
//just audit and rethrow VFS exceptions
auditor.AuditException(e, task);
throw;
}
catch (Exception e)
{
//wrap unhandled exception into VFS exception
var exception = new ResourceAccessException(errorMessage(), e);
auditor.AuditException(exception, task);
throw exception;
}
}
