1// Copyright (c) 2012 - Cloud Instruments Co., Ltd. 2// 3// All rights reserved. 4// 5// Redistribution and use in source and binary forms, with or without 6// modification, are permitted provided that the following conditions are met: 7// 8// 1. Redistributions of source code must retain the above copyright notice, this 9// list of conditions and the following disclaimer. 10// 2. Redistributions in binary form must reproduce the above copyright notice, 11// this list of conditions and the following disclaimer in the documentation 12// and/or other materials provided with the distribution. 13// 14// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 15// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 18// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 23// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 25package seelog 26 27import ( 28 "fmt" 29) 30 31// A filterDispatcher writes the given message to underlying receivers only if message log level 32// is in the allowed list. 33type filterDispatcher struct { 34 *dispatcher 35 allowList map[LogLevel]bool 36} 37 38// NewFilterDispatcher creates a new filterDispatcher using a list of allowed levels. 39func NewFilterDispatcher(formatter *formatter, receivers []interface{}, allowList ...LogLevel) (*filterDispatcher, error) { 40 disp, err := createDispatcher(formatter, receivers) 41 if err != nil { 42 return nil, err 43 } 44 45 allows := make(map[LogLevel]bool) 46 for _, allowLevel := range allowList { 47 allows[allowLevel] = true 48 } 49 50 return &filterDispatcher{disp, allows}, nil 51} 52 53func (filter *filterDispatcher) Dispatch( 54 message string, 55 level LogLevel, 56 context LogContextInterface, 57 errorFunc func(err error)) { 58 isAllowed, ok := filter.allowList[level] 59 if ok && isAllowed { 60 filter.dispatcher.Dispatch(message, level, context, errorFunc) 61 } 62} 63 64func (filter *filterDispatcher) String() string { 65 return fmt.Sprintf("filterDispatcher ->\n%s", filter.dispatcher) 66} 67