logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
  Shared logback configuration for all eCommerce services.

  WHY THIS FILE EXISTS (mounted via docker-compose LOGGING_CONFIG override):
    logstash-logback-encoder 7.4 changed LogstashEncoder.setProviders() to throw
    IllegalArgumentException if Logback's internal ImplicitModelHandler calls it
    (a behaviour introduced in Logback 1.4.8+, shipped in Spring Boot 3.2.x).
    The crash happens even when <providers> is absent from the XML — Logback itself
    triggers the call during second-phase traversal of any CompositeJsonEncoder.

  FIX:
    Move ALL appender definitions inside <springProfile> blocks.  Logback/Spring
    Boot only instantiates appenders whose enclosing <springProfile> matches the
    active profile.  In the default/native profile, LogstashEncoder is therefore
    NEVER instantiated and the crash cannot occur.

  PERMANENT FIX (requires rebuild):
    Downgrade logstash-logback-encoder to 7.3 in root pom.xml.
    Version 7.3 is the last release compatible with Logback 1.3.x / 1.4.x
    (Spring Boot 3.0–3.2).  After rebuilding JARs this file can be removed
    and the embedded logback-spring.xml in each service JAR will work correctly.
-->
<configuration>

    <springProperty scope="context" name="appName"      source="spring.application.name" defaultValue="ecommerce-service"/>
    <springProperty scope="context" name="activeProfile" source="spring.profiles.active"  defaultValue="default"/>

    <!-- ============================================================
         dev / default / native profile
         Plain console — LogstashEncoder is NOT instantiated here.
         ============================================================ -->
    <springProfile name="dev,default,native">

        <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
            <encoder>
                <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
            </encoder>
        </appender>

        <logger name="code.with.vanilson"                level="INFO"/>
        <logger name="org.springframework.web"            level="WARN"/>
        <logger name="org.springframework.security"       level="WARN"/>
        <logger name="org.hibernate.SQL"                  level="WARN"/>
        <logger name="org.hibernate.type.descriptor.sql"  level="WARN"/>
        <logger name="org.apache.kafka"                   level="WARN"/>
        <logger name="com.netflix.eureka"                 level="WARN"/>
        <logger name="com.netflix.discovery"              level="WARN"/>

        <root level="INFO">
            <appender-ref ref="CONSOLE"/>
        </root>

    </springProfile>

    <!-- ============================================================
         prod / staging profile
         Structured JSON to stdout + async rolling file for Loki/ELK.
         LogstashEncoder is only instantiated when this profile is active.
         ============================================================ -->
    <springProfile name="prod,staging">

        <appender name="JSON_CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
            <encoder class="net.logstash.logback.encoder.LogstashEncoder">
                <customFields>{"app":"${appName}","profile":"${activeProfile}"}</customFields>
            </encoder>
        </appender>

        <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
            <file>logs/${appName}.log</file>
            <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
                <fileNamePattern>logs/${appName}-%d{yyyy-MM-dd}.%i.log.gz</fileNamePattern>
                <maxFileSize>50MB</maxFileSize>
                <maxHistory>7</maxHistory>
                <totalSizeCap>500MB</totalSizeCap>
            </rollingPolicy>
            <encoder class="net.logstash.logback.encoder.LogstashEncoder">
                <customFields>{"app":"${appName}","profile":"${activeProfile}"}</customFields>
            </encoder>
        </appender>

        <appender name="ASYNC_JSON" class="ch.qos.logback.classic.AsyncAppender">
            <appender-ref ref="JSON_CONSOLE"/>
            <queueSize>512</queueSize>
            <discardingThreshold>0</discardingThreshold>
            <includeCallerData>false</includeCallerData>
        </appender>

        <appender name="ASYNC_FILE" class="ch.qos.logback.classic.AsyncAppender">
            <appender-ref ref="FILE"/>
            <queueSize>512</queueSize>
            <discardingThreshold>0</discardingThreshold>
        </appender>

        <logger name="code.with.vanilson"                level="INFO"/>
        <logger name="org.springframework.web"            level="WARN"/>
        <logger name="org.springframework.security"       level="WARN"/>
        <logger name="org.hibernate.SQL"                  level="WARN"/>
        <logger name="org.hibernate.type.descriptor.sql"  level="WARN"/>
        <logger name="org.apache.kafka"                   level="WARN"/>
        <logger name="com.netflix.eureka"                 level="WARN"/>
        <logger name="com.netflix.discovery"              level="WARN"/>

        <root level="INFO">
            <appender-ref ref="ASYNC_JSON"/>
            <appender-ref ref="ASYNC_FILE"/>
        </root>

    </springProfile>

</configuration>