即使使用org.apache.logging.log4j.core.config.Configuration，也不会更新slf4j之外的log4j2的程序配置。
运行具有以下配置的Spring引导应用程序。
package org.mevenk.webservices;
.
import org.mevenk.webservices.logger.Logger;
import org.mevenk.webservices.logger.LoggerFactory;
@EnableAutoConfiguration
@SpringBootApplication
public class MeVenkWebServicesApplication {
private static final Logger LOG =
LoggerFactory.getlogger(MeVenkWebServicesApplication.class);
public static void main(String[] args) {
SpringApplication.run(MeVenkWebServicesApplication.class, args);
}
}
public interface Logger {
public void debug(final String message);
}
package org.mevenk.webservices.logger;
import org.apache.logging.log4j.core.config.LoggerConfig;
class LoggerDefinition {
private LoggerConfig loggerConfig;
LoggerDefinition(final String name, final LogLevel logLevel, final boolean additive) {
this.loggerConfig = new LoggerConfig(name, logLevel.getLevel(), additive);
}
}
package org.mevenk.webservices.logger;
import org.apache.logging.log4j.Level;
enum LogLevel {
DEBUG {
@Override
Level getLevel() {
return Level.DEBUG;
}
}
abstract Level getLevel();
}
package org.mevenk.webservices.logger;
import org.apache.logging.log4j.LogManager;
final class MeVenkWebServicesLogger implements Logger {
private final org.apache.logging.log4j.Logger logger;
MeVenkWebServicesLogger(final Class<?> clazz) {
logger = LogManager.getLogger(clazz);
System.out.println(logger);
}
@Override
public void debug(String message) {
logger.debug(message);
}
}
通过工厂类处理的配置
package org.mevenk.webservices.logger;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.LoggerConfig;
public final class LoggerFactory {
private static final LinkedHashMap<Class<?>, Logger> LOGGER_OBJECTS = new LinkedHashMap<Class<?>, Logger>();
private static final LinkedHashSet<LoggerDefinition> LOGGER_DEFINITIONS = new LinkedHashSet<LoggerDefinition>();
static {
setLoggerConfiguration();
}
private static void setLoggerConfiguration() {
updateLoggerlevelMap();
addLogLvels();
}
private static void updateLoggerlevelMap() {
LOGGER_DEFINITIONS.add(new LoggerDefinition("org.mevenk.webservices.controller", LogLevel.DEBUG, false));
LOGGER_DEFINITIONS.add(new LoggerDefinition("org.mevenk.webservices.service", LogLevel.INFO, false));
}
private static void addLogLvels() {
final LoggerContext loggerContext = (LoggerContext) LoggerContext.getContext(false);
final Configuration config = loggerContext.getConfiguration();
for (LoggerDefinition definition : LOGGER_DEFINITIONS) {
LoggerConfig loggerConfig = definition.getLoggerConfig();
config.addLogger(loggerConfig.getName(), loggerConfig);
Level level = loggerConfig.getLevel();
loggerConfig.setLevel(level);
}
loggerContext.updateLoggers();
}
public static Logger getlogger(Class<?> clazz) {
return addOrReturnLogger(clazz);
}
private static Logger addOrReturnLogger(Class<?> clazz) {
if (!LOGGER_OBJECTS.containsKey(clazz)) {
LOGGER_OBJECTS.put(clazz, new MeVenkWebServicesLogger(clazz));
}
return LOGGER_OBJECTS.get(clazz);
}
}
此配置将*.controller软件包设置为DEBUG，但最终将其设置为INFO。
启动此应用程序将导致以下Loggers的控制台输出。
org.mevenk.webservices.MeVenkWebServicesApplication:ERROR in 18b4aac2
org.mevenk.webservices.controller.RootController:INFO in 18b4aac2
org.mevenk.webservices.controller.samplerest.SampleRestCallsController:INFO in 18b4aac2
org.mevenk.webservices.service.impl.samplerest.SampleRestCallsServiceImpl:INFO in 18b4aac2