archaius-zookeeper/src/main/java/com/netflix/config/source/ZooKeeperConfigurationSource.java
public void start() throws Exception {
    	// create the watcher for future configuration updatess
        pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
            public void childEvent(CuratorFramework aClient, PathChildrenCacheEvent event)
                    throws Exception {
                Type eventType = event.getType();
                ChildData data = event.getData();
                
                String path = null; 
                if (data != null) {
                    path = data.getPath();
                    
                    // scrub configRootPath out of the key name
                    String key = removeRootPath(path);

                    byte[] value = data.getData();
                    String stringValue = new String(value, charset);

                    logger.debug("received update to pathName [{}], eventType [{}]", path, eventType);
                    logger.debug("key [{}], and value [{}]", key, stringValue);

                    // fire event to all listeners
                    Map<String, Object> added = null;
                    Map<String, Object> changed = null;
                    Map<String, Object> deleted = null;
                    if (eventType == Type.CHILD_ADDED) {
                        added = new HashMap<String, Object>(1);
                        added.put(key, stringValue);
                    } else if (eventType == Type.CHILD_UPDATED) {
                        changed = new HashMap<String, Object>(1);
                        changed.put(key, stringValue);
                    } else if (eventType == Type.CHILD_REMOVED) {
                        deleted = new HashMap<String, Object>(1);
                        deleted.put(key, stringValue);
                    }

                    WatchedUpdateResult result = WatchedUpdateResult.createIncremental(added,
                        changed, deleted);                        

                    fireEvent(result);
                }
            }
        });

        // passing true to trigger an initial rebuild upon starting.  (blocking call)
        pathChildrenCache.start(true);
    }
public void start() throws Exception {
    	// create the watcher for future configuration updatess
        pathChildrenCache.getListenable().addListener(new PathChildrenCacheListener() {
            public void childEvent(CuratorFramework aClient, PathChildrenCacheEvent event)
                    throws Exception {
                Type eventType = event.getType();
                ChildData data = event.getData();
                
                String path = null; 
                if (data != null) {
                    path = data.getPath();
                    
                    // scrub configRootPath out of the key name
                    String key = removeRootPath(path);

                    byte[] value = data.getData();
                    String stringValue = new String(value, charset);

                    logger.debug("received update to pathName [{}], eventType [{}]", path, eventType);
                    logger.debug("key [{}], and value [{}]", key, stringValue);

                    // fire event to all listeners
                    Map<String, Object> added = null;
                    Map<String, Object> changed = null;
                    Map<String, Object> deleted = null;
                    if (eventType == Type.CHILD_ADDED) {
                        added = new HashMap<String, Object>(1);
                        added.put(key, stringValue);
                    } else if (eventType == Type.CHILD_UPDATED) {
                        changed = new HashMap<String, Object>(1);
                        changed.put(key, stringValue);
                    } else if (eventType == Type.CHILD_REMOVED) {
                        deleted = new HashMap<String, Object>(1);
                        deleted.put(key, stringValue);
                    }

                    WatchedUpdateResult result = WatchedUpdateResult.createIncremental(added,
                        changed, deleted);                        

                    fireEvent(result);
                }
            }
        });

        // passing true to trigger an initial rebuild upon starting.  (blocking call)
        pathChildrenCache.start(true);
    }
Adds a listener to the pathChildrenCache, initializes the cache, then starts the cache-management background thread

@throws Exception