datastore

package

v0.0.0-...-678bb0e Latest Latest Go to latest Published: Aug 8, 2017 License: Apache-2.0 Imports: 11 Imported by: 0

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Repository

chromium.googlesource.com/external/github.com/luci/luci-go

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Documentation ¶

Index ¶

Constants
Variables
func CronLoader(b backend.B) caching.Loader
type Config
- func (dc *Config) Backend(base backend.B) backend.B
- func (dc *Config) WithHandler(c context.Context, l caching.Loader, timeout time.Duration) context.Context

Constants ¶

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const (

	// RPCDeadline is the deadline applied to config service RPCs.
	RPCDeadline = 10 * time.Minute
)

Variables ¶

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var Cache = datastorecache.Cache{
	Name:                 "github.com/luci/luci-go/appengine/gaeconfig",
	AccessUpdateInterval: 24 * time.Hour,
	PruneFactor:          4,
	Parallel:             16,
	HandlerFunc:          getCacheHandler,
}

Cache is our registered datastore cache, bound to our Config Handler. The generator function is used by the cache manager task to get a Handler instance during refresh.

Functions ¶

func CronLoader ¶

func CronLoader(b backend.B) caching.Loader

CronLoader returns a caching.Loader implementation to be used by the Cron task.

Types ¶

type Config ¶

type Config struct {
	// RefreshInterval is the cache entry refresh interval.
	RefreshInterval time.Duration
	// FailOpen, if true, means that a cache miss or failure should be passed
	// through to the underlying cache.
	FailOpen bool

	// LockerFunc returns the Locker intance to use.
	LockerFunc func(context.Context) datastorecache.Locker
	// contains filtered or unexported fields
}

Config is a datastore cache configuration.

Cache parameters can be extracted from a config instance.

func (*Config) Backend ¶

func (dc *Config) Backend(base backend.B) backend.B

Backend wraps the specified Backend in a datastore-backed cache.

func (*Config) WithHandler ¶

func (dc *Config) WithHandler(c context.Context, l caching.Loader, timeout time.Duration) context.Context

WithHandler installs a datastorecache.Handler into our Context. This is used during datastore cache's Refresh calls.

The Handler binds the parameters and Loader to the resolution call. For service resolution, this will be the Loader that is provided by the caching layer. For cron refresh, this will be the generic Loader provided by CronLoader.

Source Files ¶

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ds.go

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