<?php
# Generated by the protocol buffer compiler.  DO NOT EDIT!
# source: google/cloud/compute/v1/compute.proto

namespace Google\Cloud\Compute\V1\BackendServiceConnectionTrackingPolicy;

use UnexpectedValueException;

/**
 * Specifies connection persistence when backends are unhealthy. The default
 * value is DEFAULT_FOR_PROTOCOL.
 * If set to DEFAULT_FOR_PROTOCOL, the existing connections
 * persist on unhealthy backends only for connection-oriented protocols
 * (TCP and SCTP) and only if the Tracking Mode isPER_CONNECTION (default tracking mode) or the Session
 * Affinity is configured for 5-tuple. They do not persist forUDP.
 * If set to NEVER_PERSIST, after a backend becomes unhealthy,
 * the existing connections on the unhealthy backend are never persisted on
 * the unhealthy backend. They are always diverted to newly selected healthy
 * backends (unless all backends are unhealthy).
 * If set to ALWAYS_PERSIST, existing connections always
 * persist on unhealthy backends regardless of protocol and session
 * affinity. It is generally not recommended to use this mode overriding the
 * default.
 * For more details, see [Connection Persistence for Network Load
 * Balancing](https://cloud.google.com/load-balancing/docs/network/networklb-backend-service#connection-persistence)
 * and [Connection Persistence for Internal TCP/UDP Load
 * Balancing](https://cloud.google.com/load-balancing/docs/internal#connection-persistence).
 *
 * Protobuf type <code>google.cloud.compute.v1.BackendServiceConnectionTrackingPolicy.ConnectionPersistenceOnUnhealthyBackends</code>
 */
class ConnectionPersistenceOnUnhealthyBackends
{
    /**
     * A value indicating that the enum field is not set.
     *
     * Generated from protobuf enum <code>UNDEFINED_CONNECTION_PERSISTENCE_ON_UNHEALTHY_BACKENDS = 0;</code>
     */
    const UNDEFINED_CONNECTION_PERSISTENCE_ON_UNHEALTHY_BACKENDS = 0;
    /**
     * Generated from protobuf enum <code>ALWAYS_PERSIST = 38400900;</code>
     */
    const ALWAYS_PERSIST = 38400900;
    /**
     * Generated from protobuf enum <code>DEFAULT_FOR_PROTOCOL = 145265356;</code>
     */
    const DEFAULT_FOR_PROTOCOL = 145265356;
    /**
     * Generated from protobuf enum <code>NEVER_PERSIST = 138646241;</code>
     */
    const NEVER_PERSIST = 138646241;

    private static $valueToName = [
        self::UNDEFINED_CONNECTION_PERSISTENCE_ON_UNHEALTHY_BACKENDS => 'UNDEFINED_CONNECTION_PERSISTENCE_ON_UNHEALTHY_BACKENDS',
        self::ALWAYS_PERSIST => 'ALWAYS_PERSIST',
        self::DEFAULT_FOR_PROTOCOL => 'DEFAULT_FOR_PROTOCOL',
        self::NEVER_PERSIST => 'NEVER_PERSIST',
    ];

    public static function name($value)
    {
        if (!isset(self::$valueToName[$value])) {
            throw new UnexpectedValueException(sprintf(
                    'Enum %s has no name defined for value %s', __CLASS__, $value));
        }
        return self::$valueToName[$value];
    }


    public static function value($name)
    {
        $const = __CLASS__ . '::' . strtoupper($name);
        if (!defined($const)) {
            throw new UnexpectedValueException(sprintf(
                    'Enum %s has no value defined for name %s', __CLASS__, $name));
        }
        return constant($const);
    }
}

