github.com/inspektor-gadget/inspektor-gadget@v0.28.1/pkg/gadget-service/logger.go (about)

     1  // Copyright 2023 The Inspektor Gadget authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package gadgetservice
    16  
    17  import (
    18  	"fmt"
    19  
    20  	"github.com/inspektor-gadget/inspektor-gadget/pkg/gadget-service/api"
    21  	"github.com/inspektor-gadget/inspektor-gadget/pkg/logger"
    22  )
    23  
    24  // Logger sends log messages through grpc
    25  type Logger struct {
    26  	send           func(*api.GadgetEvent) error
    27  	level          logger.Level
    28  	fallbackLogger logger.Logger
    29  }
    30  
    31  func (l *Logger) SetLevel(level logger.Level) {
    32  	l.level = level
    33  }
    34  
    35  func (l *Logger) GetLevel() logger.Level {
    36  	return l.level
    37  }
    38  
    39  func (l *Logger) Logf(severity logger.Level, format string, params ...any) {
    40  	if l.level < severity {
    41  		return
    42  	}
    43  	ev := &api.GadgetEvent{
    44  		Type:    uint32(severity) << api.EventLogShift,
    45  		Payload: []byte(fmt.Sprintf(format, params...)),
    46  	}
    47  	if err := l.send(ev); err != nil {
    48  		l.fallbackLogger.Logf(severity, format, params...)
    49  	}
    50  }
    51  
    52  func (l *Logger) Log(severity logger.Level, params ...any) {
    53  	if l.level < severity {
    54  		return
    55  	}
    56  	ev := &api.GadgetEvent{
    57  		Type:    uint32(severity) << api.EventLogShift,
    58  		Payload: []byte(fmt.Sprintf("%+v", params...)),
    59  	}
    60  	if err := l.send(ev); err != nil {
    61  		l.fallbackLogger.Log(severity, params...)
    62  	}
    63  }