Spring Boot jetty/tomcat embedded access log configuration

Implementation of the currently accepted answer, cortesy of Ego Slayer, posted as community wiki:

I get start from http://spring.io/guides/gs/rest-service/

just create file here src/main/java/hello/MyConfig.java

package hello;

import org.apache.catalina.valves.AccessLogValve;
import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainerFactory;
import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import ch.qos.logback.access.tomcat.LogbackValve;

@Configuration
public class MyConfig {

    @Bean
    public EmbeddedServletContainerCustomizer containerCustomizer(){
        return new EmbeddedServletContainerCustomizer() {
            @Override
            public void customize(ConfigurableEmbeddedServletContainerFactory factory) {

                if(factory instanceof TomcatEmbeddedServletContainerFactory){
                    TomcatEmbeddedServletContainerFactory containerFactory = (TomcatEmbeddedServletContainerFactory) factory;

                    LogbackValve  logbackValve = new LogbackValve();
                    logbackValve.setFilename("src/main/resources/logback-access.xml");
                    containerFactory.addContextValves(logbackValve);


                }

            }
        };
    }
}

and add logback-access in maven pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.springframework</groupId>
    <artifactId>gs-rest-service</artifactId>
    <version>0.1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>0.5.0.M6</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-access</artifactId>
            <version>1.0.13</version>
        </dependency>
    </dependencies>

    <properties>
        <start-class>hello.Application</start-class>
    </properties>

    <build>
        <plugins>
            <plugin> 
                <artifactId>maven-compiler-plugin</artifactId> 
                <version>2.3.2</version> 
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots><enabled>true</enabled></snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots><enabled>true</enabled></snapshots>
        </pluginRepository>
    </pluginRepositories>
</project>

In our case we updated a project from SpringBoot 1.3.0 to 1.5.16.RELEASE that comes with Jetty v9.x+ which broke the generation of logback access log as reported earlier in this thread. To fix the issue we did following steps -

1. Added logback-access-spring-boot-starter in dependencies, along with logback-classic and logback-core.
2. Added following code in my JettyConfig

   @Bean
RequestLog makeRequestLog() {
    RequestLog requestLog = new Jetty93RequestLogImpl()
    requestLog.resource = '/logback-access.xml'
    requestLog
}
// Jetty 9.x
private static class Jetty93RequestLogImpl extends RequestLogImpl implements LifeCycle {
}         

An example using Spring boot 2(2.1.4.RELEASE). Works well for me.

@Component
public class JettyCustomizationConfig implements WebServerFactoryCustomizer<ConfigurableJettyWebServerFactory> {

    @Override
    public void customize(ConfigurableJettyWebServerFactory server) {
        server.addServerCustomizers(customJettyServer());
    }

    private JettyServerCustomizer customJettyServer() {
        return server -> {
            HandlerCollection handlers = new HandlerCollection();
            RequestLogHandler requestLogHandler = new RequestLogHandler();
            requestLogHandler.setServer(server);
            RequestLogImpl requestLog = new RequestLogImpl();
            requestLog.setResource("/logback-access.xml");
            requestLog.setQuiet(false);
            requestLog.start();
            requestLogHandler.setRequestLog(requestLog);
            handlers.addHandler(server.getHandler());
            handlers.addHandler(requestLogHandler);
            server.setHandler(handlers);
        };
    }
}

logback-access.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
    <property name="log.path" value="logs" />

    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.path}/requests/seastar_request_%d{yyyy-MM-dd}.log</fileNamePattern>
        </rollingPolicy>
    </appender>

    <appender-ref ref="FILE"/>
</configuration>

In case it helps anyone:

In addition to configuring the LogbackValve like so

@Bean
public TomcatServletWebServerFactory servletContainer() {
    TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();
    tomcat.addContextValves(new LogbackValve());

    return tomcat;
}

I also had to place logback-access.xml under src/main/resources/conf. If I placed it in src/main/resources it was NOT loaded automatically.

This is using Spring Boot v2.5.2 and logback-access v1.2.5.