consul/agent/cache-types/options.go

package cachetype

import (
	"time"

	"github.com/hashicorp/consul/agent/cache"
)

// RegisterOptionsBlockingRefresh can be embedded into a struct to implement
// part of the agent/cache.Type interface.
// When embedded into a struct it identifies the cache type as one which
// supports blocking, and uses refresh to keep the cache fresh.
type RegisterOptionsBlockingRefresh struct{}

func (r RegisterOptionsBlockingRefresh) RegisterOptions() cache.RegisterOptions {
	return cache.RegisterOptions{
		// Maintain a blocking query, retry dropped connections quickly
		Refresh:          true,
		SupportsBlocking: true,
		RefreshTimer:     0 * time.Second,
		RefreshTimeout:   10 * time.Minute,
	}
}

// RegisterOptionsNoRefresh can be embedded into a struct to implement
// part of the agent/cache.Type interface.
// When embedded into a struct it identifies the cache type as one which
// does not support blocking, and should not be refreshed.
type RegisterOptionsNoRefresh struct{}

func (r RegisterOptionsNoRefresh) RegisterOptions() cache.RegisterOptions {
	return cache.RegisterOptions{
		Refresh:          false,
		SupportsBlocking: false,
	}
}