dubbo.apache.org/dubbo-go/v3@v3.1.1/xds/utils/grpclog/prefixLogger.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  /*
    19   *
    20   * Copyright 2020 gRPC authors.
    21   *
    22   */
    23  
    24  package grpclog
    25  
    26  import (
    27  	"fmt"
    28  )
    29  
    30  // PrefixLogger does logging with a prefix.
    31  //
    32  // Logging method on a nil logs without any prefix.
    33  type PrefixLogger struct {
    34  	logger DepthLoggerV2
    35  	prefix string
    36  }
    37  
    38  // Infof does info logging.
    39  func (pl *PrefixLogger) Infof(format string, args ...interface{}) {
    40  	if pl != nil {
    41  		// Handle nil, so the tests can pass in a nil logger.
    42  		format = pl.prefix + format
    43  		pl.logger.InfoDepth(1, fmt.Sprintf(format, args...))
    44  		return
    45  	}
    46  	InfoDepth(1, fmt.Sprintf(format, args...))
    47  }
    48  
    49  // Warnf does warning logging.
    50  func (pl *PrefixLogger) Warnf(format string, args ...interface{}) {
    51  	if pl != nil {
    52  		format = pl.prefix + format
    53  		pl.logger.WarningDepth(1, fmt.Sprintf(format, args...))
    54  		return
    55  	}
    56  	WarningDepth(1, fmt.Sprintf(format, args...))
    57  }
    58  
    59  // Errorf does error logging.
    60  func (pl *PrefixLogger) Errorf(format string, args ...interface{}) {
    61  	if pl != nil {
    62  		format = pl.prefix + format
    63  		pl.logger.ErrorDepth(1, fmt.Sprintf(format, args...))
    64  		return
    65  	}
    66  	ErrorDepth(1, fmt.Sprintf(format, args...))
    67  }
    68  
    69  // NewPrefixLogger creates a prefix logger with the given prefix.
    70  func NewPrefixLogger(logger DepthLoggerV2, prefix string) *PrefixLogger {
    71  	return &PrefixLogger{logger: logger, prefix: prefix}
    72  }