in src/main/java/org/apache/sling/discovery/oak/OakDiscoveryService.java [639:648]
public int compareTo(final ProviderInfo o) {
// Sort by rank in ascending order.
if (this.ranking < o.ranking) {
return -1; // lower rank
} else if (this.ranking > o.ranking) {
return 1; // higher rank
}
// If ranks are equal, then sort by service id in descending order.
return (this.serviceId < o.serviceId) ? 1 : -1;
}