RootLogger yog dab tsi?
RootLogger yog dab tsi?

Video: RootLogger yog dab tsi?

Video: RootLogger yog dab tsi?
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Qhov yooj yim logger uas zaum saum lub logger hierarchy yog tus rootlogger . RootLogger yog tus logger tsis tu ncua, txawm hais tias nws tsis tuaj yeem muab cov qib null thiab vim nws tsis tuaj yeem muaj niam txiv, getChainedLevel() API txoj kev ib txwm rov qab tus nqi ntawm qib teb yam tsis tau taug kev hierarchy.

Tom qab ntawd, ib tug kuj yuav nug, Appender yog dab tsi?

Cov appender yog ib feem ntawm lub kaw lus kaw lus uas yog lub luag haujlwm xa cov lus kaw mus rau qee qhov chaw lossis nruab nrab.

lub hauv paus theem hauv log4j2 yog dab tsi? Configuration: lub hauv paus element ib a cog 4j2 configuration ntaub ntawv; cov xwm txheej attribute sawv cev rau qib ntawm cov txheej xwm hauv log4j yuav tsum tau nkag mus. Appenders: lub caij no muaj cov npe ntawm cov appenders; Hauv peb qhov piv txwv, ib qho appender sib raug rau System console tau txhais.

Ib yam li ntawd, kev siv cov ntaub ntawv log4j yog dab tsi?

cov ntaub ntawv yog a cog 4j kev teeb tsa ntaub ntawv uas khaws khoom hauv key-value khub. Los ntawm lub neej ntawd, LogManager nrhiav a ntaub ntawv npe cog 4j . khoom hauv CLASSPATH. Qib ntawm lub hauv paus logger txhais tau tias yog DEBUG.

Log4j Appender ua haujlwm li cas?

Cov khoom tseem ceeb / teeb tsa hauv lub cog 4j framework uas peb ua haujlwm nrog cov loggers, appenders , layouts, qauv, thiab log-theem. Loggers yog cov khoom uas muaj npe los ntawm daim ntawv thov ua rau kev hu xov tooj. Ib appender yog qhov chaw uas cov cav raug kaw, piv txwv li. console, file, db thiab lwm yam.

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