logback-access-spring-boot-starter

Spring Boot Starter for Logback-access.

Features

• Auto-detects your configuration file and auto-configures Logback-access.
• Supports configuration files on the classpath.
• Provides extensions (<springProfile> tag, <springProperty> tag) for configuration files.
• Supports rewriting of some attributes by HTTP forward headers ("X-Forwarded-*").
• Supports remote user provided by Spring Security.
• Provides configuration properties to enable the tee filter.

Supports the following web servers:

	Web MVC (Servlet Stack)	WebFlux (Reactive Stack)
Tomcat	✅	✅
Jetty	✅	✅
Undertow	✅	✅
Netty	-	🚧 (under development)

Dependencies

Depends on:

• Java 17 or 21
• Kotlin 1.9
• Spring Boot 3.3
• Logback-access 2.0

Usage

Adding the Dependency

The artifact is published on Maven Central Repository. If you are using Maven, add the following dependency.

<dependency>
    <groupId>dev.akkinoc.spring.boot</groupId>
    <artifactId>logback-access-spring-boot-starter</artifactId>
    <version>${logback-access-spring-boot-starter.version}</version>
</dependency>

Configuring the Logback-access

Create a Logback-access configuration file "logback-access.xml" in the root of the classpath.

For example:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>common</pattern>
        </encoder>
    </appender>
    <appender-ref ref="console"/>
</configuration>

See also the Logback-access official documents:

• Logback-access configuration

Access Logging

When access the web application, it is logged.

For example:

0:0:0:0:0:0:0:1 - - [24/Oct/2021:15:32:03 +0900] "GET / HTTP/1.1" 200 319
0:0:0:0:0:0:0:1 - - [24/Oct/2021:15:32:03 +0900] "GET /favicon.ico HTTP/1.1" 404 111
0:0:0:0:0:0:0:1 - - [24/Oct/2021:15:32:04 +0900] "GET / HTTP/1.1" 304 0

Auto-detection of Configuration File

Priority Order

When the web application is started, the configuration files are searched in the following order. The first configuration file found will be used.

1. "logback-access-test.xml" in the root of the classpath.
2. "logback-access.xml" in the root of the classpath.
3. "logback-access-test-spring.xml" in the root of the classpath.
4. "logback-access-spring.xml" in the root of the classpath.
5. fallback configuration file (appends to the console with a common pattern).

Separation for Testing

If you are using Maven and place the "logback-access-test(-spring).xml" file under the "src/test/resources" folder, Maven will ensure that it won't be included in the artifact produced. Thus, you can use a different configuration file "logback-access-test(-spring).xml" during testing, and another file "logback-access(-spring).xml" in production. This is the same concept as the Logback configuration ("logback.xml" and "logback-test.xml").

Extensions for Configuration File

Profile-specific Configuration

The <springProfile> tag lets you optionally include or exclude sections of configuration based on the active Spring profiles. The usage of this extension is the same as the Spring Boot Logback Extension "Profile-specific Configuration".

<springProfile name="staging">
    <!-- configuration to be enabled when the "staging" profile is active -->
</springProfile>
<springProfile name="dev | staging">
    <!-- configuration to be enabled when the "dev" or "staging" profiles are active -->
</springProfile>
<springProfile name="!production">
    <!-- configuration to be enabled when the "production" profile is not active -->
</springProfile>

Environment Properties

The <springProperty> tag lets you expose properties from the Spring Environment for use within Logback. The usage of this extension is the same as the Spring Boot Logback Extension "Environment Properties".

<springProperty scope="context" name="fluentHost" source="myapp.fluentd.host" defaultValue="localhost"/>
<appender name="FLUENT" class="ch.qos.logback.more.appenders.DataFluentAppender">
    <remoteHost>${fluentHost}</remoteHost>
    ...
</appender>

Configuration Properties

Provides the following configuration properties. These can be configured by your "application.yml", "application.properties", etc.

# The configuration properties for Logback-access.
logback.access:
  # Whether to enable auto-configuration.
  # Defaults to true.
  enabled: true
  # The location of the configuration file.
  # Specify a URL that starts with "classpath:" or "file:".
  # Auto-detected by default:
  #   1. "classpath:logback-access-test.xml"
  #   2. "classpath:logback-access.xml"
  #   3. "classpath:logback-access-test-spring.xml"
  #   4. "classpath:logback-access-spring.xml"
  #   5. "classpath:dev/akkinoc/spring/boot/logback/access/logback-access-spring.xml"
  config: classpath:your-logback-access.xml
  # The strategy to change the behavior of IAccessEvent.getLocalPort.
  # Defaults to "server".
  #   "local":
  #     Returns the port number of the interface on which the request was received.
  #     Equivalent to ServletRequest.getLocalPort when using a servlet web server.
  #   "server":
  #     Returns the port number to which the request was sent.
  #     Equivalent to ServletRequest.getServerPort when using a servlet web server.
  #     Helps to identify the destination port number used by the client when forward headers are enabled.
  local-port-strategy: server
  # The properties for the Tomcat web server.
  tomcat:
    # Whether to enable the request attributes to work with RemoteIpValve.
    # Defaults to the presence of RemoteIpValve enabled by the property "server.forward-headers-strategy=native".
    request-attributes-enabled: true
  # The properties for the Undertow web server.
  undertow:
    # Whether to enable UndertowOptions.RECORD_REQUEST_START_TIME.
    # Used to measure IAccessEvent.getElapsedTime and IAccessEvent.getElapsedSeconds.
    # Defaults to true.
    record-request-start-time: true
  # The properties for the tee filter.
  tee-filter:
    # Whether to enable the tee filter.
    # Defaults to false.
    enabled: true
    # The host names to activate.
    # By default, all hosts are activated.
    includes: your-development-host
    # The host names to deactivate.
    # By default, all hosts are activated.
    excludes: your-production-host

API Reference

Please refer to the Javadoc.

Release Notes

Please refer to the Releases page.

License

Licensed under the Apache License, Version 2.0.

Support the Project

If this project is useful to you, I appreciate giving a ⭐ star to this repository. I would also appreciate if you would consider 💖 sponsoring as well. Your support is my biggest motive force. Thanks ✨