我根据这个解决方案编写了代码:https ://gist.github.com/umangmathur92/a65f67c01e2b425289b8
LoggerContext lc = (LoggerContext) LoggerFactory.getILoggerFactory();
lc.reset();
final String LOG_DIR = context.getExternalCacheDir() + File.separator + ".ts";
RollingFileAppender<ILoggingEvent> rollingFileAppender = new RollingFileAppender<>();
rollingFileAppender.setAppend(true);
rollingFileAppender.setContext(lc);
rollingFileAppender.setLazy(true);
rollingFileAppender.setFile(LOG_DIR + File.separator + "ts.log");
SizeBasedTriggeringPolicy<ILoggingEvent> trigPolicy = new SizeBasedTriggeringPolicy<>();
trigPolicy.setMaxFileSize(new FileSize(1024 * 256));
trigPolicy.setContext(lc);
trigPolicy.start();
FixedWindowRollingPolicy rollingPolicy = new FixedWindowRollingPolicy();
rollingPolicy.setContext(lc);
rollingPolicy.setParent(rollingFileAppender);
rollingPolicy.setFileNamePattern(LOG_DIR + File.separator + "ts.%i.log");
rollingPolicy.setMinIndex(1);
rollingPolicy.setMaxIndex(1);
rollingPolicy.start();
rollingFileAppender.setTriggeringPolicy(trigPolicy);
rollingFileAppender.setRollingPolicy(rollingPolicy);
PatternLayoutEncoder encoder = new PatternLayoutEncoder();
encoder.setPattern("%msg%n");
encoder.setContext(lc);
encoder.start();
rollingFileAppender.setEncoder(encoder);
rollingFileAppender.start();
ch.qos.logback.classic.Logger root = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME);
root.addAppender(rollingFileAppender);
但这不是我想做的。此代码在达到指定限制时删除所有文件并开始写入新文件(因此,达到 256KB 限制文件后,例如需要 10KB )。
我想将文件大小限制为 256KB,并且我想清除最旧的行以释放新行的空间。
例子:
Line 1 sample text.
Line 2 sample text.
Line 3 sample text.
Line 4 sample text.
Line 5 sample text.
想象一下,这些行占用 256KB,当我写新行时:
Line 6 sample text.
我希望这个文件看起来像:
Line 2 sample text.
Line 3 sample text.
Line 4 sample text.
Line 5 sample text.
Line 6 sample text.