SLF4J+Logback to create a file if doesn't exists/ if deleted - spring-boot

Question

I have been researching for this for a long time and doesn't get a solution at all. My requirement is to create a log file if it is not there at the place.
Below is my logback.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property name="LOG_PATH" value="/home/logs" />
<appender name="FILE-AUDIT"
class="ch.qos.logback.core.rolling.RollingFileAppender">
<file>${LOG_PATH}/debug.log</file>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<Pattern>
%p\t%d{dd MMM yyyy HH:mm:ss,SSS}\t%r\t%c\t[--%t--]\t%m%n
</Pattern>
</encoder>
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!-- rollover daily -->
<fileNamePattern>${LOG_PATH}/debug.%d{yyyy-MM-dd}.%i.log
</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy
class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>10MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
</appender>
<logger name="com.example" level="debug"
additivity="false">
<appender-ref ref="FILE-AUDIT" />
</logger>
<root level="debug">
<appender-ref ref="FILE-AUDIT" />
</root>
</configuration>
And I have tried changing the configuration to configuration debug="true", but no luck.
What is the right way to implement this ?
Please don't write to check on file permissions or ask me to use Log4j, I changed my application to use slf4j instead of log4j. If i delete the file also, it should create

Answer 1

You should use ch.qos.logback.core.FileAppender for file appending.
<appender name="File-Appender" class="ch.qos.logback.core.FileAppender">
<file>${LOG_PATH}/logfile-${timestamp-by-second}.log</file>
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>

Answer 2

Since you've said that you worked with Log4j previously make sure you didn't exclude "spring-boot-starter-logging" from your .pom in tryings to avoid conflicts between Log4j and slf4j.
I'm using the same settings in logback.xml and everything is working fine
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<Pattern>%d{HH:mm:ss} [%thread] %-5level %logger{36} - %msg %n</Pattern>
</encoder>
<filter class="ch.qos.logback.classic.filter.ThresholdFilter">
<level>TRACE</level>
</filter>
</appender>
<appender name="testServiceFileAppender" class="ch.qos.logback.core.rolling.RollingFileAppender">
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<FileNamePattern>logs/test_service_%d{yyyy-MM-dd}.log</FileNamePattern>
</rollingPolicy>
<encoder>
<Pattern>%-5level %logger{35} - %msg %n</Pattern>
</encoder>
</appender>
<logger name="com.mycompany.test" additivity="false">
<level value="INFO"/>
<appender-ref ref="testServiceFileAppender"/>
</logger>
<root>
<level value="INFO"/>
<appender-ref ref="consoleAppender"/>
</root>
</configuration>
in pom:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>