Method Merge

pkg/usagestats/seed.go:23–50

Merge implements the memberlist.Mergeable interface. It allow to merge the content of two different seeds.

(mergeable memberlist.Mergeable, _ bool)

// Merge implements the memberlist.Mergeable interface.
// It allow to merge the content of two different seeds.
func (c *ClusterSeed) Merge(mergeable memberlist.Mergeable, _ bool) (change memberlist.Mergeable, err error) {
	if mergeable == nil {
		return nil, nil
	}
	other, ok := mergeable.(*ClusterSeed)
	if !ok {
		return nil, fmt.Errorf("expected *usagestats.ClusterSeed, got %T", mergeable)
	}
	if other == nil {
		return nil, nil
	}
	// if we already have (c) the oldest key, then should not request change.
	if c.CreatedAt.Before(other.CreatedAt) {
		return nil, nil
	}
	if c.CreatedAt.Equal(other.CreatedAt) {
		// if we have the exact same creation date but the key is different
		// we take the smallest UID using string alphabetical comparison to ensure stability.
		if c.UID > other.UID {
			*c = *other
			return other, nil
		}
		return nil, nil
	}
	// if our seed is not the oldest, then we should request a change.
	*c = *other
	return other, nil
}

// MergeContent tells if the content of the two seeds are the same.
func (c *ClusterSeed) MergeContent() []string {