Question

我正在使用Log4J 2.10。

我正在尝试以编程方式创建异步logger \ appender。我需要有两件事： 1.我应该能够在运行时指定日志文件的文件路径。 2.我需要在运行时指定模式。

我可以在下面提出代码。但我不能将RollingFileAppender添加到AsyncAppender。网上有一些使用AsyncAppender.wrap的例子。但是这个API似乎不适用于Log4J 2.10。

你知道我怎么做到这一点吗？

void createLog4JLogger(final String logFilePath) {

    LoggerContext context = (LoggerContext) LogManager.getContext();
    final Configuration config = context.getConfiguration();

    final PatternLayout patternLayout = PatternLayout.newBuilder().withPattern(CONVERSION_PATTERN).withCharset(Charset.defaultCharset()).build();

    final RollingFileAppender fileAppender = 
            RollingFileAppender.newBuilder().withName(APPENDER_NAME).withLayout(patternLayout).withFileName(logFilePath).build();

    AppenderRef ref = AppenderRef.createAppenderRef(APPENDER_NAME, null, null);
    AppenderRef[] refs = new AppenderRef[] {ref};

    final AsyncAppender asyncAppender = AsyncAppender.newBuilder().setAppenderRefs(refs).setName(APPENDER_NAME).setConfiguration(config).build();

    LoggerConfig loggerConfig = LoggerConfig.createLogger(false, Level.INFO, LOGGER_NAME, LOGGER_NAME, refs, null, null, null);
    loggerConfig.addAppender(asyncAppender, null, null);


    config.addAppender(asyncAppender);
    config.addLogger(LOGGER_NAME, loggerConfig);


    context.updateLoggers(config);

    final Logger logger = LogManager.getContext().getLogger(LOGGER_NAME);


    logger.info("HELLO_WORLD");

}

提前致谢！

Answer 1

您可以使用以下代码在log4j 2中创建异步记录器。

final LoggerContext ctx = (LoggerContext) LogManager.getContext(false);
final Configuration config = ctx.getConfiguration();
Layout layout = PatternLayout.newBuilder().withConfiguration(ctx.getConfiguration()).withPattern("%d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - test %msg%n").build();
Appender appender = FileAppender.newBuilder().withFileName("logs/test.log").setLayout(layout)
                    .setConfiguration(config).setName("TestApp").build();
AppenderRef ref = AppenderRef.createAppenderRef("TestApp",Level.INFO, null);

config.addAppender(appender);
appender.start();
AppenderRef[] refs = new AppenderRef[] {ref};
LoggerConfig loggerConfig= AsyncLoggerConfig.createLogger(true, Level.INFO, "test","test", refs, null, config, null);
loggerConfig.addAppender(appender, Level.INFO, null);
config.addLogger("test", loggerConfig);
loggerConfig.start();

Answer 2

我需要使用没有配置文件的多线程log4j记录器。因此，我最终将来自多个源的代码（答案中的引用）组合在一起。它已经使用了最近几年了（抱歉，回复延迟）。也许对其他人有用：

创建记录器的类：

Const Url$ = "Web Page"

Dim UserName As String, Password As String, LoginData As Worksheet
Set LoginData = ThisWorkbook.Worksheets("Sheet1")
UserName = LoginData.Cells(1, "B").Value
Password = LoginData.Cells(2, "B").Value

Dim ie As Object
Set ie = CreateObject("InternetExplorer.Application")

With ie

.navigate Url
ieBusy ie
.Visible = True

Dim oLogin As Object, oPassword As Object
Set oLogin = .document.getElementsByName("txtUserName")(0)
Set oPassword = .document.getElementsByName("txtPassword")(0)

oLogin.Value = UserName
oPassword.Value = Password

End With

ie.document.getElementsByName("btnLogin")(0).Click



ie.navigate "Web Page"
ieBusy ie

Set Region = ie.document.getElementById("sregion")
Region.selectedIndex = 3

Set Sbg = ie.document.getElementById("sSBG")
Sbg.selectedIndex = 1

Set mth = ie.document.getElementById("smonth")
mth.selectedIndex = 0

Set htmlDoc = ie.document
Set htmlColl = htmlDoc.getElementsByTagName("input")
Do While htmlDoc.READYSTATE <> "complete": DoEvents: Loop
For Each htmlInput In htmlColl
If Trim(htmlInput.Type) = "button" Then
htmlInput.Click
Exit For
End If
Next htmlInput

'I need to insert code here to extract report

End Sub

Sub ieBusy(ie As Object)
    Do While ie.Busy Or ie.READYSTATE < 4
        DoEvents
    Loop
End Sub

}

自定义配置工厂：

class MyCustomLogger {
private static Logger createLog4JLogger(final String logFilePath, final String logLevel) {

    try {
        final Level level = (null != logLevel && 0 == logLevel.toLowerCase().compareTo(DEBUG_MODE_STRING)) ? Level.DEBUG : Level.INFO;

        ConfigurationFactory.setConfigurationFactory(new LogCustomConfigurationFactory(logFilePath, level)); // This must be called before any other calls to Log4j

        dumpStringToSysOut("created configuration factory");

        Logger logger = LogManager.getLogger();

        dumpStringToSysOut("logger is " + ((null == logger) ? "null" : "not null"));

        return logger;
    } catch(Exception e) {
        e.printStackTrace();
    }

    return null;
}

以编程方式创建log4j异步记录器

2 个答案: