avialable Slf4j Log4j version with Maven 3

An available version suit of slf4j and log4j2 with Maven 3.

pom.xml

<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-api</artifactId>
  <version>2.12.1</version>
</dependency>
<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-core</artifactId>
  <version>2.12.1</version>
</dependency>
<dependency>
  <groupId>org.apache.logging.log4j</groupId>
  <artifactId>log4j-slf4j18-impl</artifactId>
  <version>2.12.1</version>
</dependency>
<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>2.0.0-alpha0</version>
</dependency>

log4j2.xml

<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
  <Appenders>
    <Console name="STDOUT" target="SYSTEM_OUT">
      <PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) - %m%n"/>
    </Console>
    <RollingFile name="RollingFile" fileName="logs/logs.log"
      filePattern="logs/logs-%d{yyyy-MM-dd HH}.log">
      <PatternLayout>
        <Pattern>%d %p [%t] %C{2} (%F:%L) %m%n</Pattern>
      </PatternLayout>
      <Policies>
        <TimeBasedTriggeringPolicy interval="1"/>
<!--        <SizeBasedTriggeringPolicy size="128MB"/>-->
      </Policies>
    </RollingFile>
  </Appenders>
  <Loggers>
    <Root level="DEBUG">
      <AppenderRef ref="RollingFile"/>
      <AppenderRef ref="STDOUT"/>
    </Root>
  </Loggers>
</Configuration>

If you want to use log4j-slf4j-impl instead of log4j-slf4j18-impl, please attention to take right version of SLF4J to avoid a break in compatibility. Because SLF4J take different mechanism since 1.8.x.

The Log4j 2 SLF4J Binding allows applications coded to the SLF4J API to use Log4j 2 as the implementation.

Due to a break in compatibility in the SLF4J binding, as of release 2.11.1 two SLF4J to Log4j Adapters are provided.

1. log4j-slf4j-impl should be used with SLF4J 1.7.x releases or older.
2. log4j-slf4j18-impl should be used with SLF4J 1.8.x releases or newer.

Applications that take advantage of the Java Module System should use SLF4J 1.8.x and log4j-slf4j18-impl.