Example #1
0
func (this *Discover) discoverClusters(zkzone *zk.ZkZone) {
	this.Ui.Output(zkzone.Name())

	existingClusters := zkzone.Clusters()
	existingCluserPaths := make(map[string]struct{}, len(existingClusters))
	for _, path := range existingClusters {
		existingCluserPaths[path] = struct{}{}
	}

	discoveredClusters, err := zkzone.DiscoverClusters("/")
	if err != nil {
		this.Ui.Error(zkzone.Name() + ": " + err.Error())
		return
	}

	// print each cluster state: new, normal
	for _, zkpath := range discoveredClusters {
		if _, present := existingCluserPaths[zkpath]; !present {
			this.Ui.Output(strings.Repeat(" ", 4) + color.Green("%s +++",
				zkpath))
		} else {
			this.Ui.Output(strings.Repeat(" ", 4) + zkpath)
		}
	}

	// find the offline clusters
	for c, path := range existingClusters {
		path = strings.TrimSpace(path)
		foundOnline := false
		for _, p := range discoveredClusters {
			p = strings.TrimSpace(p)
			if p == path {
				foundOnline = true
				break
			}
		}
		if !foundOnline {
			this.Ui.Output(strings.Repeat(" ", 4) + color.Red("%s: %s ---", c, path))
		}
	}
}