Shulou(Shulou.com)06/02 Report--

This article introduces the relevant knowledge of "what is the role of DistroMapper of nacos". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Order

This paper mainly studies the DistroMapper of nacos.

ServerChangeListener

Nacos-1.1.3/naming/src/main/java/com/alibaba/nacos/naming/cluster/servers/ServerChangeListener.java

Public interface ServerChangeListener {/ * * If member list changed, this method is invoked. * * @ param servers servers after change * / void onChangeServerList (List servers); / * * If reachable member list changed, this method is invoked. * * @ param healthyServer reachable servers after change * / void onChangeHealthyServerList (List healthyServer);}

ServerChangeListener defines onChangeServerList and onChangeHealthyServerList methods.

DistroMapper

Nacos-1.1.3/naming/src/main/java/com/alibaba/nacos/naming/core/DistroMapper.java

@ Component ("distroMapper") public class DistroMapper implements ServerChangeListener {private List healthyList = new ArrayList (); public List getHealthyList () {return healthyList;} @ Autowired private SwitchDomain switchDomain; @ Autowired private ServerListManager serverListManager; / * * init server list * / @ PostConstruct public void init () {serverListManager.listen (this) } public boolean responsible (Cluster cluster, Instance instance) {return switchDomain.isHealthCheckEnabled (cluster.getServiceName ()) & &! cluster.getHealthCheckTask (). IsCancelled () & & responsible (cluster.getServiceName ()) & & cluster.contains (instance);} public boolean responsible (String serviceName) {if (! switchDomain.isDistroEnabled () | | SystemUtils.STANDALONE_MODE) {return true } if (CollectionUtils.isEmpty (healthyList)) {/ / means distro config is not ready yet return false;} int index = healthyList.indexOf (NetUtils.localServer ()); int lastIndex = healthyList.lastIndexOf (NetUtils.localServer ()); if (lastIndex)

= index & & target

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