How do you configure logging in Hibernate 4 to use SLF4J

Look to https://github.com/jboss-logging/jboss-logging/blob/master/src/main/java/org/jboss/logging/LoggerProviders.java:

static final String LOGGING_PROVIDER_KEY = "org.jboss.logging.provider";

private static LoggerProvider findProvider() {
    // Since the impl classes refer to the back-end frameworks directly, if this classloader can't find the target
    // log classes, then it doesn't really matter if they're possibly available from the TCCL because we won't be
    // able to find it anyway
    final ClassLoader cl = LoggerProviders.class.getClassLoader();
    try {
        // Check the system property
        final String loggerProvider = AccessController.doPrivileged(new PrivilegedAction<String>() {
            public String run() {
                return System.getProperty(LOGGING_PROVIDER_KEY);
            }
        });
        if (loggerProvider != null) {
            if ("jboss".equalsIgnoreCase(loggerProvider)) {
                return tryJBossLogManager(cl);
            } else if ("jdk".equalsIgnoreCase(loggerProvider)) {
                return tryJDK();
            } else if ("log4j".equalsIgnoreCase(loggerProvider)) {
                return tryLog4j(cl);
            } else if ("slf4j".equalsIgnoreCase(loggerProvider)) {
                return trySlf4j();
            }
        }
    } catch (Throwable t) {
    }
    try {
        return tryJBossLogManager(cl);
    } catch (Throwable t) {
        // nope...
    }
    try {
        return tryLog4j(cl);
    } catch (Throwable t) {
        // nope...
    }
    try {
        // only use slf4j if Logback is in use
        Class.forName("ch.qos.logback.classic.Logger", false, cl);
        return trySlf4j();
    } catch (Throwable t) {
        // nope...
    }
    return tryJDK();
}

So possible values for org.jboss.logging.provider are: jboss, jdk, log4j, slf4j.

If you don’t set org.jboss.logging.provider it tries jboss, then log4j, then slf4j (only if logback used) and fallback to jdk.

I use slf4j with logback-classic:

    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.0.13</version>
        <scope>${logging.scope}</scope>
    </dependency>

and all work fine!

UPDATE Some users uses in very main App.java:

static { //runs when the main class is loaded.
    System.setProperty("org.jboss.logging.provider", "slf4j");
}

but for container based solutions this is not worked.

UPDATE 2 Those who think that they manage Log4j with SLF4J for jboss-logging it is not exactly thus. jboss-logging directly uses Log4j without SLF4J!