package org.apache.hadoop.hdfs.notifier.server; public class EmptyServerClientTracker implements IServerClientTracker{ @Override public void run() {} @Override public void setClientTimeout(long timeout) {} @Override public void setHeartbeatTimeout(long timeout) {} @Override public void handleFailedDispatch(long clientId, long lastFailed) {} @Override public void handleSuccessfulDispatch(long clientId, long lastSent) {} }