config/src/main/java/org/apache/karaf/cellar/config/ConfigurationEventHandler.java
http/balancer/src/main/java/org/apache/karaf/cellar/http/balancer/BalancerEventHandler.java

config/src/main/java/org/apache/karaf/cellar/config/ConfigurationSynchronizer.java
http/balancer/src/main/java/org/apache/karaf/cellar/http/balancer/ServletSynchronizer.java