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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.routing.status;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
/**
* A group of servers behind a router/reverse proxy.
*
* @author mpolden
*/
public class ServerGroup {
private static final double requiredUpFraction = 0.25D;
private final Map<String, List<Server>> servers;
public ServerGroup(List<Server> servers) {
this.servers = servers.stream().collect(Collectors.collectingAndThen(Collectors.groupingBy(Server::upstreamName),
Collections::unmodifiableMap));
}
public Map<String, List<Server>> asMap() {
return servers;
}
/** Returns whether given upstream is healthy */
public boolean isHealthy(String upstreamName) {
List<Server> upstreamServers = servers.getOrDefault(upstreamName, List.of());
long upCount = upstreamServers.stream()
.filter(Server::up)
.count();
return upCount > upstreamServers.size() * requiredUpFraction;
}
public static class Server {
private final String upstreamName;
private final String hostport;
private final boolean up;
public Server(String upstreamName, String hostport, boolean up) {
this.upstreamName = upstreamName;
this.hostport = hostport;
this.up = up;
}
public String upstreamName() {
return upstreamName;
}
public String hostport() {
return hostport;
}
public boolean up() {
return up;
}
}
}
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