@Override
  public synchronized void createSession(final AlertingService alertingService) {
    LOGGER.info("Creating session in {} with {}.", this, alertingService);
    setAlertingService(alertingService);
  }
Builds AlertAppender instances.

@param <B> The type to build
geode-log4j/src/main/java/org/apache/geode/alerting/log4j/internal/impl/AlertAppender.java