1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 #ifndef SHARE_VM_LOGGING_LOGOUTPUT_HPP
  25 #define SHARE_VM_LOGGING_LOGOUTPUT_HPP
  26 
  27 #include "logging/logDecorators.hpp"
  28 #include "memory/allocation.hpp"
  29 #include "utilities/globalDefinitions.hpp"
  30 
  31 class LogDecorations;
  32 
  33 // The base class/interface for log outputs.
  34 // Keeps track of the latest configuration string,
  35 // and its selected decorators.
  36 class LogOutput : public CHeapObj<mtLogging> {
  37  protected:
  38   LogDecorators _decorators;
  39   char* _config_string;
  40 
  41  public:
  42   static LogOutput* const Stdout;
  43   static LogOutput* const Stderr;
  44 
  45   void set_decorators(const LogDecorators &decorators) {
  46     _decorators = decorators;
  47   }
  48 
  49   const LogDecorators& decorators() const {
  50     return _decorators;
  51   }
  52 
  53   const char* config_string() const {
  54     return _config_string;
  55   }
  56 
  57   LogOutput() : _config_string(NULL) {
  58   }
  59 
  60   virtual ~LogOutput();
  61   void set_config_string(const char* string);
  62 
  63   virtual const char* name() const = 0;
  64   virtual bool initialize(const char* options) = 0;
  65   virtual int write(const LogDecorations &decorations, const char* msg) = 0;
  66 };
  67 
  68 #endif // SHARE_VM_LOGGING_LOGOUTPUT_HPP