シーケンス
本稿では、ServerChangeListenerのナコスを見ます
ServerChangeListener
ナコス-1.1.3 /命名/ srcに/メイン/ javaの/ COM /アリババ/ナコス/命名/クラスタ/サーバ/ ServerChangeListener.java
public interface ServerChangeListener {
/**
* If member list changed, this method is invoked.
*
* @param servers servers after change
*/
void onChangeServerList(List<Server> servers);
/**
* If reachable member list changed, this method is invoked.
*
* @param healthyServer reachable servers after change
*/
void onChangeHealthyServerList(List<Server> healthyServer);
}
复制代码
- ServerChangeListenerはonChangeServerListを定義し、onChangeHealthyServerList方法
DistroMapper
ナコス-1.1.3 /命名/ srcに/メイン/ javaの/ COM /アリババ/ナコス/命名/コア/ DistroMapper.java
@Component("distroMapper")
public class DistroMapper implements ServerChangeListener {
private List<String> healthyList = new ArrayList<>();
//......
@Override
public void onChangeServerList(List<Server> latestMembers) {
}
@Override
public void onChangeHealthyServerList(List<Server> latestReachableMembers) {
List<String> newHealthyList = new ArrayList<>();
for (Server server : latestReachableMembers) {
newHealthyList.add(server.getKey());
}
healthyList = newHealthyList;
}
//......
}
复制代码
- DistroMapperはonChangeHealthyServerListが自分healthyListを更新しますServerChangeListenerインタフェースを実現しました
RaftPeerSet
ナコス-1.1.3 /命名/ srcに/メイン/ javaの/ COM /アリババ/ナコス/命名/一貫性/永続/いかだ/ RaftPeerSet.java
@Component
@DependsOn("serverListManager")
public class RaftPeerSet implements ServerChangeListener, ApplicationContextAware {
@Autowired
private ServerListManager serverListManager;
private ApplicationContext applicationContext;
private AtomicLong localTerm = new AtomicLong(0L);
private RaftPeer leader = null;
private Map<String, RaftPeer> peers = new HashMap<>();
private Set<String> sites = new HashSet<>();
private boolean ready = false;
//......
@Override
public void onChangeServerList(List<Server> latestMembers) {
Map<String, RaftPeer> tmpPeers = new HashMap<>(8);
for (Server member : latestMembers) {
if (peers.containsKey(member.getKey())) {
tmpPeers.put(member.getKey(), peers.get(member.getKey()));
continue;
}
RaftPeer raftPeer = new RaftPeer();
raftPeer.ip = member.getKey();
// first time meet the local server:
if (NetUtils.localServer().equals(member.getKey())) {
raftPeer.term.set(localTerm.get());
}
tmpPeers.put(member.getKey(), raftPeer);
}
// replace raft peer set:
peers = tmpPeers;
if (RunningConfig.getServerPort() > 0) {
ready = true;
}
Loggers.RAFT.info("raft peers changed: " + latestMembers);
}
@Override
public void onChangeHealthyServerList(List<Server> latestReachableMembers) {
}
//......
}
复制代码
- RaftPeerSetは、メソッドの更新ピアと準備ができてプロパティをonChangeServerList ServerChangeListenerインターフェースを実現しました
概要
ServerChangeListenerはonChangeServerList、onChangeHealthyServerList方法を定義して、DistroMapperがonChangeHealthyServerListがそれらhealthyListを更新するServerChangeListenerインタフェースを実現し、RaftPeerSetがServerChangeListenerインタフェースを実現し、そのonChangeServerList方法アップデートピアと準備財産