Question

我们正在从Log41.x迁移到Log4j2.x。我们在log4j1中进行了一些自定义日志记录，在其中将一些日志参数放入ThreadLocal中，以获取一些日志，以及由记录器选择并发送到附加程序的那些参数。附加程序也是自定义附加程序，它将日志消息格式化为Json格式。每次记录后，将从本地线程中清除这些参数。

我想在log4j2中实现以支持旧的日志记录系统。

我已经尝试通过覆盖日志方法创建自定义LoggerConfig类来在log4j2中进行尝试，在那里我从线程本地清除了参数。

要包括自定义Logger配置插件，我将{log4j.plugin.packages}系统属性设置为我的customLoggerConfig类包。但是log4j2配置未选择新的记录器配置。

import java.util.Arrays;
import java.util.List;

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.core.Filter;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.LoggerContext;
import org.apache.logging.log4j.core.async.AsyncLoggerContext;
import org.apache.logging.log4j.core.async.AsyncLoggerContextSelector;
import org.apache.logging.log4j.core.config.AppenderRef;
import org.apache.logging.log4j.core.config.Configuration;
import org.apache.logging.log4j.core.config.LoggerConfig;
import org.apache.logging.log4j.core.config.Property;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttribute;
import org.apache.logging.log4j.core.config.plugins.PluginConfiguration;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.core.config.plugins.validation.constraints.Required;
import org.apache.logging.log4j.message.Message;


@Plugin(name = "customLogger", category = "Core", printObject = true)
public class CustomLoggerConfig extends LoggerConfig
{

public CustomLoggerConfig(final String name, final List<AppenderRef> appenders, final Filter filter,
        final Level level, final boolean additive, final Property[] properties, final Configuration config, final boolean includeLocation)
{
    super(name, appenders, filter, level, additive, null, config, includeLocation);
}

@Override
public void log(final String loggerName, final String fqcn, final Marker marker, final Level level,
        final Message data, final Throwable t)
{
    super.log(loggerName, fqcn, marker, level, data, t);
    clearLogArg();
}

@Override
public void log(final LogEvent event)
{
    super.log(event);
    clearLogArg();
}

public void clearLogArg()
{
    LogArg.clear();
}

@PluginFactory
public static LoggerConfig createLogger(@PluginAttribute(value = "additivity", defaultBoolean = true) final boolean additivity,
        @PluginAttribute("level") final Level level,
        @Required(message = "Loggers cannot be configured without a name") @PluginAttribute("name") final String loggerName,
        @PluginAttribute("includeLocation") final String includeLocation,
        @PluginElement("AppenderRef") final AppenderRef[] refs,
        @PluginElement("Properties") final Property[] properties,
        @PluginConfiguration final Configuration config,
        @PluginElement("Filter") final Filter filter
    ) {
        return new CustomLoggerConfig(loggerName, Arrays.asList(refs), filter, level, additivity, properties, config,
            includeLocation(includeLocation, config));
}

protected static boolean includeLocation(final String includeLocationConfigValue, final Configuration configuration)
{
    if (includeLocationConfigValue == null)
    {
        LoggerContext context = null;
        if (configuration != null)
        {
            context = configuration.getLoggerContext();
        }
        if (context != null)
        {
            return !(context instanceof AsyncLoggerContext);
        }
        else
        {
            return !AsyncLoggerContextSelector.isSelected();
        }
    }
    return Boolean.parseBoolean(includeLocationConfigValue);
}
}

如何在每次登录log4j2后立即调用方法

0 个答案: