How to pass properties from application.properties to logback config file

Question

Overview:

I am using Sentry appender in my logback.xml file and I want to pass plenty of tags as parameters from application.properties file to logback config file.

logback.xml file:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <include resource="org/springframework/boot/logging/logback/file-appender.xml"/>
    <include resource="org/springframework/boot/logging/logback/console-appender.xml"/>

    <appender name="SENTRY" class="com.getsentry.raven.logback.SentryAppender">
        <dsn>
            https://e0a61232c92f42ffa34c22914d676a8e:e64f7edc60de490eb004556d2b3fce45@sentry.io/112817
        </dsn>
        <springProfile name="dev">
            <tags>env:dev,app:${app.name},platform:aws</tags>
        </springProfile>
        <springProfile name="stage">
            <tags>env:dev</tags>
        </springProfile>
        <springProfile name="test">
            <tags>env:test</tags>
        </springProfile>

        <filter class="ch.qos.logback.classic.filter.ThresholdFilter">
            <level>ERROR</level>
        </filter>
    </appender>

    <root level="ERROR">
        <appender-ref ref="CONSOLE"/>
        <appender-ref ref="SENTRY"/>
    </root>

</configuration> 

application.properties:

security.ignored=/**

logging.level.root = DEBUG

spring.profiles.active=dev
app.name=retailServices

Note: the spring.profiles.active property in application.properties is mapped to springProfile tag in logback config file.

---

But the issue is the fact that the "app.name" property cannot be found in logback.xml file. If I use this property as system properties it works but I want to pass it to config file from application.properties.

So any solution, feedback and idea would be highly appreciated.

Answer 1

In logback.xml include:

<property resource="application.properties" />

And then you can refer properties in a standard way, for example ${app.name}.