alog/src/alog-policy_db.ads

97 lines
3.4 KiB
Ada

--
-- Copyright (c) 2019,
-- Reto Buerki, Adrian-Ken Rueegsegger
--
-- This file is part of Alog.
--
-- Alog is free software; you can redistribute it and/or modify
-- it under the terms of the GNU Lesser General Public License as published
-- by the Free Software Foundation; either version 2.1 of the License, or
-- (at your option) any later version.
--
-- Alog is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Lesser General Public License for more details.
--
-- You should have received a copy of the GNU Lesser General Public License
-- along with Alog; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
-- MA 02110-1301 USA
--
with Alog.Maps;
-- Logging policy database package. This package provides type definitions to
-- implement identifier-based filtering.
package Alog.Policy_DB is
protected type Protected_Policy_DB is
procedure Set_Default_Loglevel (Level : Log_Level);
-- Set given loglevel as default loglevel.
function Get_Default_Loglevel return Log_Level;
-- Return current default loglevel.
procedure Set_Loglevel
(Identifier : String;
Level : Log_Level);
-- Set given loglevel for specified identifier string. If the identifier
-- is already present the loglevel is updated. Identifier strings are
-- case-sensitive.
--
-- Use wildcards to specify a loglevel for a range of identifiers.
-- Identifier hierarchies are separated by dots, the wildcard is '*'.
-- The following example sets a Debug loglevel for all log-identifiers
-- in Foo.Bar (including Foo.Bar).
--
-- Example:
-- Foo.Bar.* = Debug
--
-- Direct matches take precedence over wildcard matches. In the
-- following example the loglevel for identifier 'Foo.Bar' is
-- explicitly set to Info.
--
-- Example:
-- Foo.Bar = Info
-- Foo.Bar.* = Debug
procedure Set_Loglevel (Identifiers : Maps.Wildcard_Level_Map);
-- Apply loglevels for identifiers stored in map.
function Get_Loglevel (Identifier : String) return Log_Level;
-- Return loglevel for given identifier string. Raises No_Ident_Loglevel
-- exception if no entry for given identifier is found (exact match
-- only, no wildcard lookup).
function Lookup (Identifier : String) return Log_Level;
-- Return loglevel for given identifier string or the closest wildcard
-- match. If no associated loglevel is found the default loglevel is
-- returned.
procedure Reset;
-- Reset the logging policy database to the initial state.
function Accept_ID
(Identifier : String;
Level : Log_Level)
return Boolean;
-- Returns True if the given loglevel is accepted for a specified
-- identifier. The loglevel is compared against the default loglevel if
-- no match for the given identifier is found.
private
Ident_Levels : Maps.Wildcard_Level_Map;
-- Identifier based loglevels.
Current_Default_Loglevel : Log_Level := Log_Level'First;
-- Current default loglevel.
end Protected_Policy_DB;
No_Ident_Loglevel : exception;
-- Will be raised if loglevel is not found for a requested identifier.
end Alog.Policy_DB;