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_LOGFILESTREAMOUTPUT_HPP

    25 #define SHARE_VM_LOGGING_LOGFILESTREAMOUTPUT_HPP

    26 

    27 #include "logging/logDecorators.hpp"

    28 #include "logging/logOutput.hpp"

    29 #include "utilities/globalDefinitions.hpp"

    30 

    31 class LogDecorations;

    32 

    33 class LogFileStreamInitializer {

    34  public:

    35   LogFileStreamInitializer();

    36 };

    37 

    38 // Ensure the default log streams have been initialized (stdout, stderr) using the static initializer below

    39 static LogFileStreamInitializer log_stream_initializer;

    40 

    41 // Base class for all FileStream-based log outputs.

    42 class LogFileStreamOutput : public LogOutput {

    43  protected:

    44   FILE*               _stream;

    45   size_t              _decorator_padding[LogDecorators::Count];

    46 

    47   LogFileStreamOutput(FILE *stream) : _stream(stream) {

    48     for (size_t i = 0; i < LogDecorators::Count; i++) {

    49       _decorator_padding[i] = 0;

    50     }

    51   }

    52 

    53   int write_decorations(const LogDecorations& decorations);

    54 

    55  public:

    56   virtual int write(const LogDecorations& decorations, const char* msg);

    57   virtual int write(LogMessageBuffer::Iterator msg_iterator);

    58 };

    59 

    60 class LogStdoutOutput : public LogFileStreamOutput {

    61   friend class LogFileStreamInitializer;

    62  private:

    63   LogStdoutOutput() : LogFileStreamOutput(stdout) {

    64     set_config_string("all=warning");

    65   }

    66   virtual bool initialize(const char* options, outputStream* errstream) {

    67     return false;

    68   }

    69  public:

    70   virtual const char* name() const {

    71     return "stdout";

    72   }

    73 };

    74 

    75 class LogStderrOutput : public LogFileStreamOutput {

    76   friend class LogFileStreamInitializer;

    77  private:

    78   LogStderrOutput() : LogFileStreamOutput(stderr) {

    79     set_config_string("all=off");

    80   }

    81   virtual bool initialize(const char* options, outputStream* errstream) {

    82     return false;

    83   }

    84  public:

    85   virtual const char* name() const {

    86     return "stderr";

    87   }

    88 };

    89 

    90 extern LogStderrOutput &StderrLog;

    91 extern LogStdoutOutput &StdoutLog;

    92 

    93 #endif // SHARE_VM_LOGGING_LOGFILESTREAMOUTPUT_HPP