narada4d

package

v0.0.0-...-535d4ab Latest Latest Go to latest Published: Apr 20, 2018 License: MIT Imports: 6 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
Learn more about best practices

Repository

github.com/powerman/go-service-narada4d-example

Links

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Documentation ¶

Constants ¶

This section is empty.

Variables ¶

View Source

var (
	ErrDirNotSet         = errors.New("NARADA4D_DIR is not set")
	ErrDirNotDir         = errors.New("NARADA4D_DIR is not a directory")
	ErrDirNotInitialized = errors.New("NARADA4D_DIR is not initialized")
)

Errors returned by Init.

View Source

var (
	// Dir is $NARADA4D_DIR.
	Dir string
)

Functions ¶

func ExclusiveLock ¶

func ExclusiveLock()

ExclusiveLock will set exclusive lock, send SetVersion event and wait for the response. You must Unlock before calling ExclusiveLock or SharedLock again.

func Init ¶

func Init(c chan<- SetVersion) error

Init must be called before using this package.

func SharedLock ¶

func SharedLock()

SharedLock will set shared lock, send SetVersion event and wait for the response. You must Unlock before calling ExclusiveLock or SharedLock again.

func Unlock ¶

func Unlock()

Unlock will release lock set by ExclusiveLock or SharedLock. You must call ExclusiveLock or SharedLock before Unlock.

Types ¶

type SetVersion ¶

type SetVersion struct {
	Version string
	Done    chan<- struct{}
}

SetVersion is an event sent after successful locking. Event consumer should check is it compatible with Version and either setup data access accordingly to Version and then send to Done or shutdown application without sending to Done.

Source Files ¶

View all Source files

lock.go

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