public void addLogstashAppender(LoggerContext context) { log.info("Initializing Logstash logging"); LogstashSocketAppender logstashAppender = new LogstashSocketAppender(); logstashAppender.setName("LOGSTASH"); logstashAppender.setContext(context); String customFields = "{\"app_name\":\"" + appName + "\",\"app_port\":\"" + serverPort + "\"}"; // Set the Logstash appender config from JHipster properties logstashAppender.setSyslogHost(jHipsterProperties.getLogging().getLogstash().getHost()); logstashAppender.setPort(jHipsterProperties.getLogging().getLogstash().getPort()); logstashAppender.setCustomFields(customFields); // Limit the maximum length of the forwarded stacktrace so that it won't exceed the 8KB UDP // limit of logstash ShortenedThrowableConverter throwableConverter = new ShortenedThrowableConverter(); throwableConverter.setMaxLength(7500); throwableConverter.setRootCauseFirst(true); logstashAppender.setThrowableConverter(throwableConverter); logstashAppender.start(); // Wrap the appender in an Async appender for performance AsyncAppender asyncLogstashAppender = new AsyncAppender(); asyncLogstashAppender.setContext(context); asyncLogstashAppender.setName("ASYNC_LOGSTASH"); asyncLogstashAppender.setQueueSize( jHipsterProperties.getLogging().getLogstash().getQueueSize()); asyncLogstashAppender.addAppender(logstashAppender); asyncLogstashAppender.start(); context.getLogger("ROOT").addAppender(asyncLogstashAppender); }