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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">Our server is multi-tenant. On startup, we make some adjustments to the appenders to align with application configuration.</p>
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">private</span> void initAppenders() {
RollOverAppenderSettings debugAppender = AppendersFactory.getAppenderSettings(APPENDER.DEBUG);
<span class="code-keyword" style="color: #000091">assert</span> debugAppender != <span class="code-keyword" style="color: #000091">null</span>;
debugAppender.setLoggerName(application.getLoggerName());
debugAppender.setLogFile(getDebugLogFile());
LogUtil.addAppender(debugAppender);
RollOverAppenderSettings auditAppender = AppendersFactory.getAppenderSettings(APPENDER.AUDIT);
<span class="code-keyword" style="color: #000091">assert</span> auditAppender != <span class="code-keyword" style="color: #000091">null</span>;
auditAppender.setLoggerName(<span class="code-quote" style="color: #009100">"audit-"</span> + application.getLoggerName());
auditAppender.setLogFile(getAuditLogFile());
LogUtil.addAppender(auditAppender);
LogUtil.applyLogLevel(<span class="code-quote" style="color: #009100">"audit-"</span> + application.getLoggerName(), <span class="code-quote" style="color: #009100">"info"</span>);
RollOverAppenderSettings trashAppender = AppendersFactory.getAppenderSettings(APPENDER.TRASH);
<span class="code-keyword" style="color: #000091">assert</span> trashAppender != <span class="code-keyword" style="color: #000091">null</span>;
trashAppender.setLoggerName(<span class="code-quote" style="color: #009100">"trash-"</span> + application.getLoggerName());
trashAppender.setLogFile(getTrashLogFile());
LogUtil.addAppender(trashAppender);
LogUtil.applyLogLevel(<span class="code-quote" style="color: #009100">"trash-"</span> + application.getLoggerName(), <span class="code-quote" style="color: #009100">"info"</span>);
}
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<pre class="code-java" style="margin: 10px 0 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">public</span> class LogUtil {
<span class="code-keyword" style="color: #000091">protected</span> <span class="code-keyword" style="color: #000091">static</span> Logger logger = LoggerFactory.getLogger(LogUtil.class);
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> void applyLogLevel(<span class="code-object" style="color: #910091">String</span> loggerName, <span class="code-object" style="color: #910091">String</span> logLevel) {
Logger log = LoggerFactory.getLogger(loggerName);
<span class="code-keyword" style="color: #000091">if</span> (!(log <span class="code-keyword" style="color: #000091">instanceof</span> ch.qos.logback.classic.Logger)) {
logger.debug(<span class="code-quote" style="color: #009100">"cannot set log level. not using logback"</span>);
<span class="code-keyword" style="color: #000091">return</span>;
}
ch.qos.logback.classic.Logger logger = (ch.qos.logback.classic.Logger) LoggerFactory.getLogger(loggerName);
Level level = Level.INFO;
<span class="code-keyword" style="color: #000091">try</span> {
level = Level.valueOf(logLevel.toUpperCase(Locale.ENGLISH));
} <span class="code-keyword" style="color: #000091">catch</span> (Exception e) {
logger.error(<span class="code-quote" style="color: #009100">"invalid <span class="code-keyword" style="color: #000091; color: #009100">new</span> log level value {level='"</span> + logLevel+ <span class="code-quote" style="color: #009100">"'}"</span>);
}
logger.setLevel(level);
}
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> void detachAppenders(<span class="code-object" style="color: #910091">String</span> loggerName) {
ch.qos.logback.classic.Logger logbackLogger = getLogger(loggerName);
<span class="code-keyword" style="color: #000091">if</span> (logbackLogger != <span class="code-keyword" style="color: #000091">null</span>) {
Iterator<Appender<ILoggingEvent>> appenders = logbackLogger.iteratorForAppenders();
<span class="code-keyword" style="color: #000091">while</span> (appenders.hasNext()) {
Appender<ch.qos.logback.classic.spi.ILoggingEvent> appender = appenders.next();
logbackLogger.detachAppender(appender);
}
}
}
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> void removeAndStopAllAppenders(<span class="code-object" style="color: #910091">String</span> loggerName) {
ch.qos.logback.classic.Logger logbackLogger = getLogger(loggerName);
<span class="code-keyword" style="color: #000091">if</span> (logbackLogger != <span class="code-keyword" style="color: #000091">null</span>) {
logbackLogger.detachAndStopAllAppenders();
}
}
/**
* @param loggerName
* @<span class="code-keyword" style="color: #000091">return</span>
*/
<span class="code-keyword" style="color: #000091">private</span> <span class="code-keyword" style="color: #000091">static</span> ch.qos.logback.classic.Logger getLogger(<span class="code-object" style="color: #910091">String</span> loggerName) {
ILoggerFactory factory = LoggerFactory.getILoggerFactory();
<span class="code-keyword" style="color: #000091">if</span> (!(factory <span class="code-keyword" style="color: #000091">instanceof</span> LoggerContext)) {
logger.debug(<span class="code-quote" style="color: #009100">"logging service is not using logback. skipping log initialized."</span>);
<span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">null</span>;
}
LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
ch.qos.logback.classic.Logger logbackLogger = context.getLogger(loggerName);
<span class="code-keyword" style="color: #000091">return</span> logbackLogger;
}
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">static</span> void addAppender(RollOverAppenderSettings appender) {
LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
File logFile = appender.getLogFile();
RollingFileAppender<ILoggingEvent> rfAppender = <span class="code-keyword" style="color: #000091">new</span> RollingFileAppender<>();
rfAppender.setName(appender.getLoggerName());
rfAppender.setContext(loggerContext);
rfAppender.setFile(logFile.getPath());
RollingPolicy rollingPolicy = appender.getRollingPolicy();
rollingPolicy.setParent(rfAppender);
rollingPolicy.start();
TriggeringPolicy<ILoggingEvent> triggeringPolicy = appender.getTriggeringPolicy();
triggeringPolicy.start();
PatternLayoutEncoder encoder = <span class="code-keyword" style="color: #000091">new</span> PatternLayoutEncoder();
encoder.setContext(loggerContext);
encoder.setPattern(appender.getLogEntryPattern());
encoder.start();
rfAppender.setEncoder(encoder);
rfAppender.setRollingPolicy(rollingPolicy);
rfAppender.setTriggeringPolicy(triggeringPolicy);
rfAppender.start();
AsyncAppender asyncAppender = <span class="code-keyword" style="color: #000091">new</span> AsyncAppender();
asyncAppender.setName(appender.getLoggerName());
asyncAppender.setContext(loggerContext);
asyncAppender.setQueueSize(1024);
asyncAppender.addAppender(rfAppender);
asyncAppender.start();
ch.qos.logback.classic.Logger logbackLogger = loggerContext.getLogger(appender.getLoggerName());
logbackLogger.setAdditive(<span class="code-keyword" style="color: #000091">false</span>);
logbackLogger.addAppender(asyncAppender);
<span class="code-keyword" style="color: #000091">if</span> (<span class="code-object" style="color: #910091">System</span>.getProperty(<span class="code-quote" style="color: #009100">"stdout"</span>) != <span class="code-keyword" style="color: #000091">null</span>) {
ConsoleAppender<ILoggingEvent> consoleAppender = <span class="code-keyword" style="color: #000091">new</span> ConsoleAppender<>();
PatternLayoutEncoder stdoutEncoder = <span class="code-keyword" style="color: #000091">new</span> PatternLayoutEncoder();
stdoutEncoder.setContext(loggerContext);
stdoutEncoder.setPattern(<span class="code-quote" style="color: #009100">"%d{yyyy-MM-dd HH:mm:ss} %c{1} [%p] %m%n"</span>);
stdoutEncoder.start();
consoleAppender.setEncoder(stdoutEncoder);
consoleAppender.start();
logbackLogger.addAppender(consoleAppender);
}
StatusPrinter.print(loggerContext);
logger = LoggerFactory.getLogger(appender.getLoggerName());
}
}
</pre>
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