@Override
    public void registerRemote(RemoteInstance remoteInstance) {
        this.remoteInstance = remoteInstance;
        this.remoteInstance.getAddress().setSelf(true);
    }
A cluster manager simulator. Work in memory only. Also return the current instance.
oap-server/server-cluster-plugin/cluster-standalone-plugin/src/main/java/org/apache/skywalking/oap/server/cluster/plugin/standalone/StandaloneManager.java