log4j2 滚动文件名

Question

有没有办法获取滚动文件名？我编写了自定义插件来指示文件滚动，但我需要获取滚动文件的文件名。我的插件由 java 代码发出信号：

自定义插件：

@Plugin(name = "RTriggerPolicy", category = "Core", printObject = true)
public class RTriggerPolicy implements TriggeringPolicy {
    //...
    @Override
    public boolean isTriggeringEvent(LogEvent event) {
        if (event instanceof RLogEvent)
            return true;
        return false;
    }
    //...
}

log4j2.xml:

<RollingFile name="appFile" fileName="${dir}app.log" append="true" filePattern="${dir}${roll}app-%d{yyyyMMddHHmmssSSS}.log">
    <ThresholdFilter level="INFO" onMatch="ACCEPT" onMismatch="DENY" />
    <PatternLayout pattern="${pattern}" />
    <Policies>
        <RTriggerPolicy name="app"/>
    </Policies>
</RollingFile>

Answer 1

获取滚动文件名的唯一方法是扩展 DefaultRolloverStrategy 并覆盖翻转方法。然后，您可以将其实现为：

@Override
public RolloverDescription rollover(final RollingFileManager manager) throws SecurityException {
    RolloverDescription rolloverDescription = super.rollover(manager);
    if (rolloverDescription.getSynchronous instanceof FileRenameAction) {
        File file = ((FileRenameAction) rolloverDescription.getSynchronous()).getDestination();
        // Do something useful here.
    }
}

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