gitee.com/mirrors/gauge@v1.0.6/logger/logWriter.go (about)

     1  // Copyright 2019 ThoughtWorks, Inc.
     2  
     3  // This file is part of Gauge.
     4  
     5  // Gauge is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  
    10  // Gauge is distributed in the hope that it will be useful,
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  // GNU General Public License for more details.
    14  
    15  // You should have received a copy of the GNU General Public License
    16  // along with Gauge.  If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package logger
    19  
    20  import (
    21  	"encoding/json"
    22  	"fmt"
    23  	"io"
    24  	"os"
    25  	"strings"
    26  )
    27  
    28  // Writer reperesnts to a custom writer.
    29  // It intercents the log messages and redirects them to logger according the log level given in info
    30  type Writer struct {
    31  	loggerID            string
    32  	ShouldWriteToStdout bool
    33  	stream              int
    34  	File                io.Writer
    35  }
    36  
    37  // LogInfo repesents the log message structure for plugins
    38  type LogInfo struct {
    39  	LogLevel string `json:"logLevel"`
    40  	Message  string `json:"message"`
    41  }
    42  
    43  func (w Writer) Write(p []byte) (int, error) {
    44  	logEntry := string(p)
    45  	logEntries := strings.Split(logEntry, "\n")
    46  	for _, _logEntry := range logEntries {
    47  		_logEntry = strings.Trim(_logEntry, " ")
    48  		if len(_logEntry) == 0 {
    49  			continue
    50  		}
    51  		_p := []byte(_logEntry)
    52  		m := &LogInfo{}
    53  		err := json.Unmarshal(_p, m)
    54  		if err != nil {
    55  			fmt.Fprintln(w.File, string(_p))
    56  		}
    57  		if w.stream > 0 {
    58  			m.Message = fmt.Sprintf("[runner: %d] %s", w.stream, m.Message)
    59  		}
    60  		switch m.LogLevel {
    61  		case "debug":
    62  			logDebug(GetLogger(w.loggerID), w.ShouldWriteToStdout, m.Message)
    63  		case "info":
    64  			logInfo(GetLogger(w.loggerID), w.ShouldWriteToStdout, m.Message)
    65  		case "error":
    66  			logError(GetLogger(w.loggerID), w.ShouldWriteToStdout, m.Message)
    67  		case "warning":
    68  			logWarning(GetLogger(w.loggerID), w.ShouldWriteToStdout, m.Message)
    69  		case "fatal":
    70  			logCritical(GetLogger(w.loggerID), m.Message)
    71  			addFatalError(w.loggerID, m.Message)
    72  		}
    73  	}
    74  	return len(p), nil
    75  }
    76  
    77  // LogWriter reperesents the type which consists of two custom writers
    78  type LogWriter struct {
    79  	Stderr io.Writer
    80  	Stdout io.Writer
    81  }
    82  
    83  // NewLogWriter creates a new logWriter for given id
    84  func NewLogWriter(loggerID string, stdout bool, stream int) *LogWriter {
    85  	return &LogWriter{
    86  		Stderr: Writer{ShouldWriteToStdout: stdout, stream: stream, loggerID: loggerID, File: os.Stderr},
    87  		Stdout: Writer{ShouldWriteToStdout: stdout, stream: stream, loggerID: loggerID, File: os.Stdout},
    88  	}
    89  }