Logback - Different log file path base on the application profile - logback

Question

I am trying to use logback.xml for my project and for development i am using windows env and for deployment i am using unix env so i have created below xml file.
However when my application starts look like it's trying to validate the path specified. and it end up with below error.
how do i achieve this using logback?
java.lang.IllegalStateException: Logback configuration error detected:
ERROR in ch.qos.logback.core.rolling.RollingFileAppender[UNIX_FILE] - Failed to create parent directories for [C:\as\Users\satishkn\apps\workspaceslogs\carats-api-2019-02-18.log]
ERROR in ch.qos.logback.core.rolling.RollingFileAppender[UNIX_FILE] - openFile(null,true) call failed. java.io.FileNotFoundException: \as\Users\satishkn\apps\workspaceslogs\carats-api-2019-02-18.log (The system cannot find the path specified)
at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:169)
logback.xml
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<property name="windows_log_dir" value="./logs/" />
<property name="unix_log_dir" value="/as/Users/satishkn/apps/workspaceslogs/" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>
%d{dd-MM-yyyy HH:mm:ss.SSS} %magenta([%thread]) %highlight(%-5level) %logger.%M - %msg%n
</pattern>
</encoder>
</appender>
<appender name="WIN_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!-- daily rollover -->
<fileNamePattern>${windows_log_dir}carats-api-%d{yyyy-MM-dd}.log</fileNamePattern>
<maxHistory>30</maxHistory>
</rollingPolicy>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<Pattern>
%d{dd-MM-yyyy HH:mm:ss.SSS} [%thread] %-5level %logger{36}.%M - %msg%n
</Pattern>
</encoder>
</appender>
<appender name="UNIX_FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<!-- daily rollover -->
<fileNamePattern>${unix_log_dir}carats-api-%d{yyyy-MM-dd}.log</fileNamePattern>
<maxHistory>30</maxHistory>
</rollingPolicy>
<encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
<Pattern>
%d{dd-MM-yyyy HH:mm:ss.SSS} [%thread] %-5level %logger{36}.%M - %msg%n
</Pattern>
</encoder>
</appender>
<springProfile name="default">
<root level="info">
<appender-ref ref="STDOUT" />
<appender-ref ref="WIN_FILE" />
</root>
</springProfile>
<!-- <springProfile name="dev">
<root level="info">
<appender-ref ref="STDOUT" />
<appender-ref ref="UNIX_FILE" />
</root>
</springProfile>
<springProfile name="prod">
<root level="info">
<appender-ref ref="UNIX_FILE" />
</root>
</springProfile> -->
</configuration>

Answer 1

Using your configuration both appenders will be instanciated in both unix and windows environnement. You should use conditional configuration to achive your requirements.
I suggest you define a log_dir param this way :
<if condition='property("os.name").contains("win")'>
<then>
<property name="log_dir" value="./logs/" />
</then>
<else>
<property name="log_dir" value="/as/Users/satishkn/apps/workspaceslogs/" />
</else>
</if>
Then create a single appender that uses the log_dir property.