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  • Apa itu Logback.xml Logging Framework? Contoh ConsoleAppender, FileAppender dan RollingFileAppender

Apa itu Logback.xml Logging Framework? Contoh ConsoleAppender, FileAppender dan RollingFileAppender

Diterbitkan: 2019-02-13
Apa itu Logback.xml Logging Framework? ConsoleAppender, FileAppender, dan Tutorial RollingFileAppender

Apakah Anda mengetahui Logback Logging Framework ? Yah, sebagian besar orang terutama menggunakan log4j and slf4j ke dalam proyek mereka. Sejak 6 bulan terakhir saya telah menggunakan kerangka kerja logging Logback.xml dan saya akan mengatakan saya melihat beberapa peningkatan kinerja dalam aplikasi produksi saya.

Dalam tutorial ini kita akan membahas contoh praktis kerangka kerja Logback logging.

Apa itu logback.qos.ch?

Logback adalah jenis versi baru dari Log4j. Ini dikembangkan dari mana pengembangan log4j berhenti.

Detail Kerangka Pencatatan Logback

Di Crunchify, kami telah menerbitkan beberapa tutorial di Log4j jika Anda tertarik:

  • Bagaimana cara mengatur level logging log4j Anda sendiri?
  • Bagaimana cara mengkonfigurasi log4j.properties?

Di sini kita akan membahas semua langkah mendetail tentang cara menyiapkan Logback Logging Framework untuk Proyek Java Perusahaan Anda. Kami akan membuat file baru di bawah ini.

  1. Di bawah file logback.xml folder sumber daya
  2. Java Class CrunchifyLogbackLogging.java

Mari kita mulai

Langkah-1 Buat file logback.xml

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<? xml version = "1.0" encoding = "UTF-8" ?>
< configuration >
 
< appender name = "CRUNCHIFYOUT" class = "ch.qos.logback.core.ConsoleAppender" >
< layout class = "ch.qos.logback.classic.PatternLayout" >
< Pattern > % d { HH : mm : ss . SSS } [ % thread ] % - 5level % logger { 36 }
% X { sourceThread } - % msg % n < / Pattern >
< / layout >
< / appender >
 
< appender name = "CRUNCHIFYFILE" class = "ch.qos.logback.core.FileAppender" >
< file > / Users / ashah / Documents / crunchify . log < / file >
 
< encoder >
< pattern > % date % level [ % thread ] % logger { 10 } [ % file : % line ] % msg % n < / pattern >
< / encoder >
< / appender >
 
< appender name = "CRUNCHIFYROLLING" class = "ch.qos.logback.core.rolling.RollingFileAppender" >
< file > / Users / ashah / Documents / crunchify - rolling . log < / file >
 
< encoder class = "ch.qos.logback.classic.encoder.PatternLayoutEncoder" >
< Pattern >
% d { yyyy - MM - dd HH : mm : ss } [ % thread ] % level % logger { 35 } - % msg % n
< / Pattern >
< / encoder >
 
< rollingPolicy class = "ch.qos.logback.core.rolling.TimeBasedRollingPolicy" >
< ! -- We are rolling over daily -- >
< fileNamePattern > crunchify . log . timeroll . % d { yyyy - MM - dd } . log < / fileNamePattern >
 
< ! -- keep 10 days ' worth of history capped at 1GB total size -- >
< maxHistory > 10 < / maxHistory >
< totalSizeCap > 1GB < / totalSizeCap >
 
< / rollingPolicy >
< / appender >
 
< ! -- default is DEBUG -- >
< root level = "DEBUG" >
< appender - ref ref = "CRUNCHIFYOUT" / >
< appender - ref ref = "CRUNCHIFYFILE" / >
< appender - ref ref = "CRUNCHIFYROLLING" / >
< / root >
 
< / configuration >

Mari kita pahami file logback.xml terlebih dahulu.

  • Di bagian bawah file Anda melihat kami memiliki 3 referensi appender-ref di bawah elemen root .
  • Kami menggunakan level log sebagai DEBUG . Itu berarti mencetak semuanya dengan level DEBUG ke atas.

CRUNCHIFYOUT adalah dari kelas ch.qos.logback.core. ConsoleAppender . Artinya, semua data logging akan dicetak ke Eclipse Console.

CRUNCHIFYFILE bertipe ch.qos.logback.core. FileAppender . Artinya, semua data logging juga akan dicetak ke localfile. Dalam kasus kami ini adalah /Users/ ashah /Documents/ crunchify.log .

CRUNCHIFYROLLING bertipe ch.qos.logback.core.rolling. RollingFileAppender . Seperti yang Anda lihat di rollingPolicy, kami menggulung file setiap hari dan menyimpan maksimum 10 file. Juga, ada total batas Kapasitas ukuran file yaitu 1 GB dalam contoh kami. File baru akan dibuat di lokasi /Users/ ashah /Documents/ crunchify -rolling.log .

Langkah-2 Tulis program Java untuk mengujinya.

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package crunchify . com . tutorial ;
 
import org . slf4j . Logger ;
import org . slf4j . LoggerFactory ;
 
/**
* @author Crunchify.com
* Program: Very simple Logback.xml test class with ConsoleAppender, FileAppender and RollingFileAppender
* Version: 1.0.0
*
*/
 
public class CrunchifyLogbackLogging {
 
private final Logger crunchifyLogging = LoggerFactory . getLogger ( CrunchifyLogbackLogging . class ) ;
 
public static void main ( String [ ] args ) {
 
CrunchifyLogbackLogging crunchifyLogger = new CrunchifyLogbackLogging ( ) ;
crunchifyLogger . getStartedwithLogBackTesting ( ) ;
 
}
 
private void getStartedwithLogBackTesting ( ) {
 
for ( int i = 1 ; i < = 10 ; i ++ ) {
crunchifyLogging . debug ( "......This is test by Crunchify on Logback DEBUG...... " ) ;
crunchifyLogging . info ( "......This is test by Crunchify on Logback INFO......" ) ;
crunchifyLogging . error ( "......This is test by Crunchify on Logback ERROR......" ) ;
crunchifyLogging . warn ( "......This is test by Crunchify on Logback WARN......" ) ;
}
 
}
}

Ini adalah kelas Uji Java yang sangat sederhana, di mana kami menggunakan kesalahan, info, debug, dan memperingatkan semua 4 level logging. Kami mengulang 10 kali.

Langkah-3

Setelah Anda menjalankan program di atas, kerangka kerja logback akan membuat dua file baru seperti yang disebutkan di atas.

Periksa Konsol Eclipse Anda. Anda akan melihat di bawah log:

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15 : 36 : 12 , 978 | - INFO in ch . qos . logback . classic . LoggerContext [ default ] - Could NOT find resource [ logback - test . xml ]
15 : 36 : 12 , 978 | - INFO in ch . qos . logback . classic . LoggerContext [ default ] - Could NOT find resource [ logback . groovy ]
15 : 36 : 12 , 978 | - INFO in ch . qos . logback . classic . LoggerContext [ default ] - Found resource [ logback . xml ] at [ file : / Users / ashah / Documents / site / Bitbucket / crunchifytutorials / target / classes / logback . xml ]
15 : 36 : 13 , 077 | - INFO in ch . qos . logback . classic . joran . action . ConfigurationAction - debug attribute not set
15 : 36 : 13 , 077 | - INFO in ch . qos . logback . core . joran . action . AppenderAction - About to instantiate appender of type [ ch . qos . logback . core . ConsoleAppender ]
15 : 36 : 13 , 087 | - INFO in ch . qos . logback . core . joran . action . AppenderAction - Naming appender as [ CRUNCHIFYOUT ]
15 : 36 : 13 , 143 | - WARN in ch . qos . logback . core . ConsoleAppender [ CRUNCHIFYOUT ] - This appender no longer admits a layout as a sub - component , set an encoder instead .
15 : 36 : 13 , 143 | - WARN in ch . qos . logback . core . ConsoleAppender [ CRUNCHIFYOUT ] - To ensure compatibility , wrapping your layout in LayoutWrappingEncoder .
15 : 36 : 13 , 143 | - WARN in ch . qos . logback . core . ConsoleAppender [ CRUNCHIFYOUT ] - See also http : //logback.qos.ch/codes.html#layoutInsteadOfEncoder for details
15 : 36 : 13 , 144 | - INFO in ch . qos . logback . core . joran . action . AppenderAction - About to instantiate appender of type [ ch . qos . logback . core . FileAppender ]
15 : 36 : 13 , 147 | - INFO in ch . qos . logback . core . joran . action . AppenderAction - Naming appender as [ CRUNCHIFYFILE ]
15 : 36 : 13 , 147 | - INFO in ch . qos . logback . core . joran . action . NestedComplexPropertyIA - Assuming default type [ ch . qos . logback . classic . encoder . PatternLayoutEncoder ] for [ encoder ] property
15 : 36 : 13 , 148 | - INFO in ch . qos . logback . core . FileAppender [ CRUNCHIFYFILE ] - File property is set to [ / Users / ashah / Documents / crunchify . log ]
15 : 36 : 13 , 151 | - INFO in ch . qos . logback . core . joran . action . AppenderAction - About to instantiate appender of type [ ch . qos . logback . core . rolling . RollingFileAppender ]
15 : 36 : 13 , 152 | - INFO in ch . qos . logback . core . joran . action . AppenderAction - Naming appender as [ CRUNCHIFYROLLING ]
15 : 36 : 13 , 159 | - INFO in c . q . l . core . rolling . TimeBasedRollingPolicy @ 2096171631 - setting totalSizeCap to 1 GB
15 : 36 : 13 , 161 | - INFO in c . q . l . core . rolling . TimeBasedRollingPolicy @ 2096171631 - No compression will be used
15 : 36 : 13 , 163 | - INFO in c . q . l . core . rolling . TimeBasedRollingPolicy @ 2096171631 - Will use the pattern crunchify . log . timeroll . % d { yyyy - MM - dd } . log for the active file
15 : 36 : 13 , 166 | - INFO in c . q . l . core . rolling . DefaultTimeBasedFileNamingAndTriggeringPolicy - The date pattern is 'yyyy-MM-dd' from file name pattern 'crunchify.log.timeroll.%d{yyyy-MM-dd}.log' .
15 : 36 : 13 , 166 | - INFO in c . q . l . core . rolling . DefaultTimeBasedFileNamingAndTriggeringPolicy - Roll - over at midnight .
15 : 36 : 13 , 171 | - INFO in c . q . l . core . rolling . DefaultTimeBasedFileNamingAndTriggeringPolicy - Setting initial period to Thu Sep 07 11 : 42 : 27 CDT 2017
15 : 36 : 13 , 173 | - INFO in ch . qos . logback . core . rolling . RollingFileAppender [ CRUNCHIFYROLLING ] - Active log file name : / Users / ashah / Documents / crunchify - rolling . log
15 : 36 : 13 , 173 | - INFO in ch . qos . logback . core . rolling . RollingFileAppender [ CRUNCHIFYROLLING ] - File property is set to [ / Users / ashah / Documents / crunchify - rolling . log ]
15 : 36 : 13 , 173 | - INFO in ch . qos . logback . classic . joran . action . RootLoggerAction - Setting level of ROOT logger to DEBUG
15 : 36 : 13 , 174 | - INFO in ch . qos . logback . core . joran . action . AppenderRefAction - Attaching appender named [ CRUNCHIFYOUT ] to Logger [ ROOT ]
15 : 36 : 13 , 174 | - INFO in ch . qos . logback . core . joran . action . AppenderRefAction - Attaching appender named [ CRUNCHIFYFILE ] to Logger [ ROOT ]
15 : 36 : 13 , 174 | - INFO in ch . qos . logback . core . joran . action . AppenderRefAction - Attaching appender named [ CRUNCHIFYROLLING ] to Logger [ ROOT ]
15 : 36 : 13 , 174 | - INFO in ch . qos . logback . classic . joran . action . ConfigurationAction - End of configuration .
15 : 36 : 13 , 175 | - INFO in ch . qos . logback . classic . joran . JoranConfigurator @ 7e0babb1 - Registering current configuration as safe fallback point
 
15 : 36 : 13.181 [ main ] DEBUG c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback DEBUG . . . . . .
15 : 36 : 13.186 [ main ] INFO    c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback INFO . . . . . .
15 : 36 : 13.187 [ main ] ERROR c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback ERROR . . . . . .
15 : 36 : 13.187 [ main ] WARN    c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback WARN . . . . . .
15 : 36 : 13.188 [ main ] DEBUG c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback DEBUG . . . . . .
15 : 36 : 13.188 [ main ] INFO    c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback INFO . . . . . .
15 : 36 : 13.188 [ main ] ERROR c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback ERROR . . . . . .
15 : 36 : 13.188 [ main ] WARN    c . c . tutorial . CrunchifyLogbackLogging
- . . . . . . This is test by Crunchify on Logback WARN . . . . . .

Selain itu Anda juga dapat memeriksa log file lokal dan seperti yang Anda lihat, file logback.xml telah membuat semua file baru dan mulai mencetak log di dalamnya.

File logback.xml membuat file appender file baru

Selamat menikmati, Anda telah menyiapkan logback.xml dan ketiga appender dengan benar: ConsoleAppender, FileAppender, RollingFileAppender.

Poin bonus:

Apakah Anda ingin mengatur RollingFileAppender dengan FixedWindowRollingPolicy ? Nah gunakan appender di bawah ini dan masukkan ke file logback.xml dan Anda seharusnya baik-baik saja

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< appender name = "CRUNCHIFYROLLINGFIXEDWINDOW" class = "ch.qos.logback.core.rolling.RollingFileAppender" >
     < file > / Users / ashah / Documents / crunchify - rolling - fixwindows . log < / file >
     < encoder class = "ch.qos.logback.classic.encoder.PatternLayoutEncoder" >
         < pattern > % date % level [ % thread ] % logger { 10 } [ % file : % line ] % msg % n < / pattern >
     < / encoder >
     < rollingPolicy class = "ch.qos.logback.core.rolling.FixedWindowRollingPolicy" >
         < FileNamePattern > crunchify . log . fixedsize . { yyyy - MM - dd } % i . log < / FileNamePattern >
         < MinIndex > 1 < / MinIndex >
         < MaxIndex > 15 < / MaxIndex >
     < / rollingPolicy >
     < triggeringPolicy class = "ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy" >
         < MaxFileSize > 20MB < / MaxFileSize >
     < / triggeringPolicy >
< / appender >

Juga, cukup tambahkan appender-ref di bawah elemen root.

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< appender - ref ref = "CRUNCHIFYROLLINGFIXEDWINDOW" / >