[logback-user] Custom appender is being ignored

[Ceki Gülcü]

Hello Zac,

AppenderBase will not invoke the append() method less the appender has
the started flag set to true.


-- 
Ceki Gülcü

Sponsoring SLF4J/logback/reload4j at https://github.com/sponsors/qos-ch

On 7/25/2022 6:38 PM, Zac Harvey wrote:
> Java 11 and logback-classic-1.2.11 here. I'm trying to write my own
> custom appender and am following this Baeldung article
> <https://www.baeldung.com/custom-logback-appender> to test it out.
> 
> My *src/main/java/myapp/logging/CatAppender* appender (on the runtime
> classpath):
> 
> public class CatAppender extends AppenderBase<ILoggingEvent> {
>     @Override
>     protected void append(ILoggingEvent eventObject) {
>         System.out.println("meow");
>     }
> }
> 
> My *src/main/resources/logback.xml*:
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <configuration debug="true">
> 
>     <appender name="cat" class="myapp.logging.CatAppender"/>
> 
>     <root level="info">
>         <appender-ref ref="cat" />
>     </root>
> 
> </configuration>
> 
> In my *build.gradle* I specify to use logback and Lombok:
> 
> plugins {
>     id "io.freefair.lombok" version '6.4.0'
> }
> 
> dependencies {
>     implementation (
>         'ch.qos.logback:logback-classic:1.2.11'
>         ,'org.projectlombok:lombok:1.18.16'
>     )
> }
> 
> And then in my Java code I use Lombok to inject an SLF4J logger like so:
> 
> @Slf4j
> public class SomethingDoer {
> 
>     public void doSomething() {
>         log.info <http://log.info>("this should invoke the CatAppender...");
>     }
> 
> }
> 
> But when *SomethingDoer#doSomething()* runs, I don't see a meow printed
> to my STDOUT console. Have I wired anything up incorrectly here?
>