com.yahoo.vespa.hosted.provision.lb.LoadBalancerInstance Maven / Gradle / Ivy

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Keeps track of node assignment in a multi-application setup.

There is a newer version: 8.458.13

// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.provision.lb;

import com.google.common.collect.ImmutableSortedSet;
import com.yahoo.config.provision.HostName;

import java.util.Objects;
import java.util.Optional;
import java.util.Set;

/**
 * Represents a load balancer instance. This contains the fields that are owned by a {@link LoadBalancerService} and is
 * immutable.
 *
 * @author mpolden
 */
public class LoadBalancerInstance {

    private final HostName hostname;
    private final Optional dnsZone;
    private final Set ports;
    private final Set networks;
    private final Set reals;

    public LoadBalancerInstance(HostName hostname, Optional dnsZone, Set ports, Set networks,
                                Set reals) {
        this.hostname = Objects.requireNonNull(hostname, "hostname must be non-null");
        this.dnsZone = Objects.requireNonNull(dnsZone, "dnsZone must be non-null");
        this.ports = ImmutableSortedSet.copyOf(requirePorts(ports));
        this.networks = ImmutableSortedSet.copyOf(Objects.requireNonNull(networks, "networks must be non-null"));
        this.reals = ImmutableSortedSet.copyOf(Objects.requireNonNull(reals, "targets must be non-null"));
    }

    /** Fully-qualified domain name of this load balancer. This hostname can be used for query and feed */
    public HostName hostname() {
        return hostname;
    }

    /** ID of the DNS zone associated with this */
    public Optional dnsZone() {
        return dnsZone;
    }

    /** Listening port(s) of this load balancer */
    public Set ports() {
        return ports;
    }

    /** Networks (CIDR blocks) of this load balancer */
    public Set networks() {
        return networks;
    }

    /** Real servers behind this load balancer */
    public Set reals() {
        return reals;
    }

    /** Returns a copy of this with reals set to given reals */
    public LoadBalancerInstance withReals(Set reals) {
        return new LoadBalancerInstance(hostname, dnsZone, ports, networks, reals);
    }

    private static Set requirePorts(Set ports) {
        Objects.requireNonNull(ports, "ports must be non-null");
        if (ports.isEmpty()) {
            throw new IllegalArgumentException("ports must be non-empty");
        }
        if (!ports.stream().allMatch(port -> port >= 1 && port <= 65535)) {
            throw new IllegalArgumentException("all ports must be >= 1 and <= 65535");
        }
        return ports;
    }

}