/* * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #ifndef SHARE_VM_LOGGING_LOGOUTPUT_HPP #define SHARE_VM_LOGGING_LOGOUTPUT_HPP #include "logging/logDecorators.hpp" #include "logging/logLevel.hpp" #include "logging/logMessageBuffer.hpp" #include "memory/allocation.hpp" #include "utilities/globalDefinitions.hpp" class LogDecorations; class LogMessageBuffer; class LogTagSet; // The base class/interface for log outputs. // Keeps track of the latest configuration string, // and its selected decorators. class LogOutput : public CHeapObj { // Make LogConfiguration a friend to allow it to modify the configuration string. friend class LogConfiguration; private: static const size_t InitialConfigBufferSize = 256; char* _config_string; size_t _config_string_buffer_size; protected: LogDecorators _decorators; // Clears any previous config description in preparation of reconfiguration. void clear_config_string(); // Adds the tagset on the given level to the config description (e.g. "tag1+tag2=level"). void add_to_config_string(const LogTagSet* ts, LogLevelType level); // Replaces the current config description with the given string. void set_config_string(const char* string); public: static LogOutput* const Stdout; static LogOutput* const Stderr; void set_decorators(const LogDecorators &decorators) { _decorators = decorators; } const LogDecorators& decorators() const { return _decorators; } const char* config_string() const { return _config_string; } LogOutput() : _config_string(NULL), _config_string_buffer_size(0) { } virtual ~LogOutput(); // If the output can be rotated, trigger a forced rotation, otherwise do nothing. // Log outputs with rotation capabilities should override this. virtual void force_rotate() { // Do nothing by default. } virtual const char* name() const = 0; virtual bool initialize(const char* options) = 0; virtual int write(const LogDecorations& decorations, const char* msg) = 0; virtual int write(LogMessageBuffer::Iterator msg_iterator) = 0; }; #endif // SHARE_VM_LOGGING_LOGOUTPUT_HPP