Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Introduction to CocoaLumberjack
Search
Kristian Andersen
February 13, 2014
Programming
0
100
Introduction to CocoaLumberjack
Presented at Cocoaheads Copenhagen on 13 Februrary 2014
Kristian Andersen
February 13, 2014
Tweet
Share
More Decks by Kristian Andersen
See All by Kristian Andersen
Isomorphic Web Apps with React
ksmandersen
0
31
Flexbox all the things
ksmandersen
2
150
Static Websites with Gulp & AWS
ksmandersen
0
120
Practical MVVM
ksmandersen
0
210
Practical Swift
ksmandersen
1
200
Other Decks in Programming
See All in Programming
코딩 에이전트 체크리스트: Claude Code ver.
nacyot
0
980
Advanced Micro Frontends: Multi Version/ Framework Scenarios @WAD 2025, Berlin
manfredsteyer
PRO
0
440
Claude Code で Astro blog を Pages から Workers へ移行してみた
codehex
0
140
Streamlitで実現できるようになったこと、実現してくれたこと
ayumu_yamaguchi
2
210
脱Riverpod?fqueryで考える、TanStack Queryライクなアーキテクチャの可能性
ostk0069
0
560
テスト環境にCDを導入してみた
yasaigaoisi
0
100
生成AI時代のコンポーネントライブラリの作り方
touyou
1
300
AI駆動のマルチエージェントによる業務フロー自動化の設計と実践
h_okkah
0
290
テスターからテストエンジニアへ ~新米テストエンジニアが歩んだ9ヶ月振り返り~
non0113
2
240
中級グラフィックス入門~効率的なメッシュレット描画~
projectasura
2
1.2k
初学者でも今すぐできる、Claude Codeの生産性を10倍上げるTips
s4yuba
16
13k
Vibe Codingの幻想を超えて-生成AIを現場で使えるようにするまでの泥臭い話.ai
fumiyakume
18
9.1k
Featured
See All Featured
Measuring & Analyzing Core Web Vitals
bluesmoon
7
530
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Code Reviewing Like a Champion
maltzj
524
40k
VelocityConf: Rendering Performance Case Studies
addyosmani
332
24k
Facilitating Awesome Meetings
lara
54
6.5k
jQuery: Nuts, Bolts and Bling
dougneiner
63
7.8k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
Done Done
chrislema
184
16k
Into the Great Unknown - MozCon
thekraken
40
1.9k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
29
9.6k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
A better future with KSS
kneath
238
17k
Transcript
CocoaLumberjack
Hi! I’m Kristian @ksmandersen
None
None
CocoaLumberjack
Why? • NSLog is inflexible • NSLog is slow •
NSLog has no levels
Performance “[…] I switched out all the logging statements from
using NSLog to use CocoaLumberjacks DDLog instead, and saw an increase in performance of almost 6x […]”
Performance “[…] I switched out all the logging statements from
using NSLog to use CocoaLumberjacks DDLog instead, and saw an increase in performance of almost 6x […]”
Performance 1. Open a new connection to ASL daemon 2.
Send message to ASL daemon 3. Close that connection 4. Write the same message to STDERR 5. for each NSLog statement: GOTO 1;
CocoaLumberjack • Multiple outputs • Different logging levels • Much
faster! • Very flexible
Getting started [DDLog addLogger:[DDTTYLogger sharedInstance]];
LEVELS DDLogError(@"Some error %@, %@", error, error.userInfo); DDLogWarn(@"Unexpected thing"); DDLogInfo(@"Heads
up here"); DDLogDebug(@"Bug bug debug"); DDLogVerbose(@"Extreme verbosity");
Replacing NSLOG // Making NSLog use Cocoa Lumberjack #define NSLog
DDLogInfo
Replacing NSLOG // Making NSLog use Cocoa Lumberjack #define NSLog
DDLogInfo
Colors https://github.com/robbiehanson/XcodeColors
AFNetworking AFNetworkActivityLogger *logger = [AFNetworkActivityLogger sharedLogger]; ! [logger setLevel:AFLoggerLevelInfo]]; [logger
startLogging];
AFNetworking GET http://example.com/foo/bar.json 200 http://example.com/foo/bar.json ! POST http://example.com/other/url.json 503 http://example.com/other/url.json
Crashlytics [DDLog addLogger:[CrashlyticsLogger sharedInstance]];
Formatters DDLogError(@"Paper Jam!"); // E | Paper Jam! DDLogWarn(@"Low toner.");
// W | Low toner. DDLogInfo(@"Doc printed."); // I | Doc printed. DDLogDebug(@"Debugging"); // D | Debugging DDLogVerbose(@"Init doc_parse"); // V | Init doc_parse.
Formatters - (NSString *)formatLogMessage:(DDLogMessage *)logMessage { NSString *logLevel; switch (logMessage->logFlag)
{ case LOG_FLAG_ERROR : logLevel = @"E"; break; case LOG_FLAG_WARN : logLevel = @"W"; break; case LOG_FLAG_INFO : logLevel = @"I"; break; case LOG_FLAG_DEBUG : logLevel = @"D"; break; default : logLevel = @"V"; break; } return [NSString stringWithFormat:@"%@ | %@\n", logLevel, logMessage->logMsg]; }
Per logger levels [DDLog addLogger:[DDTTYLogger sharedInstance] withLogLevel:LOG_LEVEL_INFO];
PER CLASS LEVEL + (NSArray *)registeredClasses; + (NSArray *)registeredClassNames; !
+ (int)logLevelForClass:(Class)aClass; + (int)logLevelForClassWithName:(NSString *)aClassName; ! + (void)setLogLevel:(int)logLevel forClass:(Class)aClass; + (void)setLogLevel:(int)logLevel forClassWithName:(NSString *)aClassName;
App broken w/ no crash
App broken w/ no crash
Rolling Logs DDFileLogger *fileLogger = [[DDFileLogger alloc] init]; ! [fileLogger
setRollingFrequency:60 * 60 * 24]; [fileLogger setMaximumFileSize:1024 * 1024 * 2]; [fileLogger.logFileManager setMaximumNumberOfLogFiles:7]; [DDLog addLogger:fileLogger];
DEMO
Questions? @ksmandersen
jobs.robo.cat