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 "errors" 29 "time" 30) 31 32// asyncTimerLogger represents asynchronous logger which processes the log queue each 33// 'duration' nanoseconds 34type asyncTimerLogger struct { 35 asyncLogger 36 interval time.Duration 37} 38 39// NewAsyncLoopLogger creates a new asynchronous loop logger 40func NewAsyncTimerLogger(config *logConfig, interval time.Duration) (*asyncTimerLogger, error) { 41 42 if interval <= 0 { 43 return nil, errors.New("async logger interval should be > 0") 44 } 45 46 asnTimerLogger := new(asyncTimerLogger) 47 48 asnTimerLogger.asyncLogger = *newAsyncLogger(config) 49 asnTimerLogger.interval = interval 50 51 go asnTimerLogger.processQueue() 52 53 return asnTimerLogger, nil 54} 55 56func (asnTimerLogger *asyncTimerLogger) processItem() (closed bool) { 57 asnTimerLogger.queueHasElements.L.Lock() 58 defer asnTimerLogger.queueHasElements.L.Unlock() 59 60 for asnTimerLogger.msgQueue.Len() == 0 && !asnTimerLogger.Closed() { 61 asnTimerLogger.queueHasElements.Wait() 62 } 63 64 if asnTimerLogger.Closed() { 65 return true 66 } 67 68 asnTimerLogger.processQueueElement() 69 return false 70} 71 72func (asnTimerLogger *asyncTimerLogger) processQueue() { 73 for !asnTimerLogger.Closed() { 74 closed := asnTimerLogger.processItem() 75 76 if closed { 77 break 78 } 79 80 <-time.After(asnTimerLogger.interval) 81 } 82} 83