使用ConfigurationFactory以编程方式配置log4j2
我正在尝试仅通过使用ConfigurationFactory和此引用来配置和设置Log4j2。 我正在使用的代码如下：
public class LoggingConfiguration { public static final String PATTERN_LAYOUT = "[%d] [%t] [%-5level] - %msg (%logger{1}:%L) %n%throwable"; public static final String LOG_FILE_NAME = "app.log"; public static final String LOG_FILE_NAME_PATTERN = LOG_FILE_NAME + "-yyyy.MM.dd"; static { ConfigurationFactory.setConfigurationFactory(new Log4j2ConfigurationFactory()); } /** * Just to make JVM visit this class to initialize the static parts. */ public static void configure() { } @Plugin(category = "ConfigurationFactory", name = "Log4j2ConfigurationFactory") @Order(0) public static class Log4j2ConfigurationFactory extends ConfigurationFactory { @Override protected String[] getSupportedTypes() { return null; } @Override public Configuration getConfiguration(ConfigurationSource source) { return new Log4j2Configuration(); } @Override public Configuration getConfiguration(String name, URI configLocation) { return new Log4j2Configuration(); } } private static class Log4j2Configuration extends DefaultConfiguration { public Log4j2Configuration() { setName("app-log4j2"); String root = System.getProperty("APP_ROOT", "/tmp"); if (!root.endsWith("/")) { root += "/"; } // MARKER Layout layout = PatternLayout.createLayout(PATTERN_LAYOUT, null, null, null, null); String oneDay = TimeUnit.DAYS.toMillis(1) + ""; String oneMB = (1024 * 1024) + ""; final TimeBasedTriggeringPolicy timeBasedTriggeringPolicy = TimeBasedTriggeringPolicy.createPolicy(oneDay, "true"); final SizeBasedTriggeringPolicy sizeBasedTriggeringPolicy = SizeBasedTriggeringPolicy.createPolicy(oneMB); final CompositeTriggeringPolicy policy = CompositeTriggeringPolicy.createPolicy(timeBasedTriggeringPolicy, sizeBasedTriggeringPolicy); final DefaultRolloverStrategy strategy = DefaultRolloverStrategy.createStrategy("7", "1", null, Deflater.DEFAULT_COMPRESSION + "", this); Appender appender = RollingFileAppender.createAppender(root + LOG_FILE_NAME, LOG_FILE_NAME_PATTERN, "true", "app-log-file-appender", "true", "true", policy, strategy, layout, null, null, null, null, null); addAppender(appender); getRootLogger().addAppender(appender, Level.INFO, null); } } }
注意
- 它扩展了默认配置控制台的
BaseConfiguration - 它尝试将滚动文件appender添加到根记录器
我得到以下exception：
Exception in thread "main" java.lang.IllegalStateException: Pattern does not contain a date at org.apache.logging.log4j.core.appender.rolling.PatternProcessor.getNextTime(PatternProcessor.java:91) at org.apache.logging.log4j.core.appender.rolling.TimeBasedTriggeringPolicy.initialize(TimeBasedTriggeringPolicy.java:49) at org.apache.logging.log4j.core.appender.rolling.CompositeTriggeringPolicy.initialize(CompositeTriggeringPolicy.java:43) at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.(RollingFileManager.java:58) at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:297) at org.apache.logging.log4j.core.appender.rolling.RollingFileManager$RollingFileManagerFactory.createManager(RollingFileManager.java:267) at org.apache.logging.log4j.core.appender.AbstractManager.getManager(AbstractManager.java:71) at org.apache.logging.log4j.core.appender.OutputStreamManager.getManager(OutputStreamManager.java:65) at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.getFileManager(RollingFileManager.java:78) at org.apache.logging.log4j.core.appender.RollingFileAppender.createAppender(RollingFileAppender.java:175) at com.narmnevis.papyrus.LoggingConfiguration$Log4j2Configuration.(LoggingConfiguration.java:79) at com.narmnevis.papyrus.LoggingConfiguration$Log4j2ConfigurationFactory.getConfiguration(LoggingConfiguration.java:55) at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:377) at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:149) at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:85) at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:34) at org.apache.logging.log4j.LogManager.getContext(LogManager.java:200) at org.slf4j.helpers.Log4jLoggerFactory$PrivateManager.getContext(Log4jLoggerFactory.java:104) at org.slf4j.helpers.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:90) at org.slf4j.helpers.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:46) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:270) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281) at com.narmnevis.papyrus.Main.(Main.java:12) at com.narmnevis.papyrus.Main.main(Main.java:21)
如果我在上面的代码中注释掉MARKER之后的代码，它可以工作，但似乎我错过了配置滚动文件appender的东西。 我该怎么做才能解决这个问题？
在log4j 2.x中，您必须以这种方式指定日期格式
public static final String LOG_FILE_NAME_PATTERN = LOG_FILE_NAME + "-%d{dd-MM-yyy}";
-
%表示格式的开头 -
d表示它是日期格式（您也可以使用date） - 在花括号
{}你定义了格式化程序的选项。 在这种情况下，日期格式。 您可以使用SimpleDateFormat可以接受的所有内容。
此外，您还可以使用：
-
%d{ABSOLUTE}– >HH:mm:ss,SSS -
%d{COMPACT}– >yyyyMMddHHmmssSSS -
%d{DATE}– >dd MMM yyyy HH:mm:ss,SSS -
%d{ISO8601_BASIC}– >yyyyMMdd HHmmss,SSS -
%d{ISO8601}– >yyyy-MM-dd HH:mm:ss,SSS
注意：此信息基于log4j 2.0-beta9（当前版本）。 由于它是测试版，因此可能略有变化。