File: apple_silicon_utils.go

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package applesilicon

import (
	"time"

	"github.com/scaleway/scaleway-sdk-go/internal/async"
	"github.com/scaleway/scaleway-sdk-go/internal/errors"
	"github.com/scaleway/scaleway-sdk-go/scw"
)

const (
	defaultRetryInterval = 15 * time.Second
	defaultTimeout       = 60 * time.Minute
)

// WaitForInstanceRequest is used by WaitForServer method.
type WaitForServerRequest struct {
	ServerID      string
	Zone          scw.Zone
	Timeout       *time.Duration
	RetryInterval *time.Duration
}

// WaitForServer waits for the instance to be in a "terminal state" before returning.
// This function can be used to wait for an instance to be ready for example.
func (s *API) WaitForServer(req *WaitForServerRequest, opts ...scw.RequestOption) (*Server, error) {
	timeout := defaultTimeout
	if req.Timeout != nil {
		timeout = *req.Timeout
	}
	retryInterval := defaultRetryInterval
	if req.RetryInterval != nil {
		retryInterval = *req.RetryInterval
	}

	terminalStatus := map[ServerStatus]struct{}{
		ServerStatusReady: {},
		ServerStatusError: {},
	}

	server, err := async.WaitSync(&async.WaitSyncConfig{
		Get: func() (interface{}, bool, error) {
			res, err := s.GetServer(&GetServerRequest{
				ServerID: req.ServerID,
				Zone:     req.Zone,
			}, opts...)

			if err != nil {
				return nil, false, err
			}
			_, isTerminal := terminalStatus[res.Status]

			return res, isTerminal, nil
		},
		Timeout:          timeout,
		IntervalStrategy: async.LinearIntervalStrategy(retryInterval),
	})
	if err != nil {
		return nil, errors.Wrap(err, "waiting for server failed")
	}
	return server.(*Server), nil
}