internal

package
v0.4.0-beta.1 Latest Latest
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 Go to latest Published: Apr 5, 2022 License: Apache-2.0 Imports: 20 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	FileEventCreated = 1 << iota
	FileEventModified
	FileEventDeleted
)

File event mask constants.

View Source 
const (
	MaxUint = ^uint(0)
	MaxInt  = int(MaxUint >> 1)
)

Platform-independent maximum integer sizes.

Variables

View Source 
var (
	OperationTotalCounterVec = promauto.NewCounterVec(prometheus.CounterOpts{
		Name: "litestream_replica_operation_total",
		Help: "The number of replica operations performed",
	}, []string{"replica_type", "operation"})

	OperationBytesCounterVec = promauto.NewCounterVec(prometheus.CounterOpts{
		Name: "litestream_replica_operation_bytes",
		Help: "The number of bytes used by replica operations",
	}, []string{"replica_type", "operation"})
)

Shared replica metrics.

View Source 
var ErrFileEventQueueOverflow = errors.New("file event queue overflow")

ErrFileEventQueueOverflow is returned when the file event queue has overflowed.

Functions

func CreateFile added in v0.3.5 

func CreateFile(filename string, mode os.FileMode, uid, gid int) (*os.File, error)

CreateFile creates the file and matches the mode & uid/gid of fi.

func Fileinfo added in v0.3.5 

func Fileinfo(fi os.FileInfo) (uid, gid int)

Fileinfo returns syscall fields from a FileInfo object.

func MD5Hash 

func MD5Hash(b []byte) string

MD5Hash returns a hex-encoded MD5 hash of b.

func MkdirAll added in v0.3.5 

func MkdirAll(path string, mode os.FileMode, uid, gid int) error

MkdirAll is a copy of os.MkdirAll() except that it attempts to set the mode/uid/gid to match fi for each created directory.

func OnceCloser 

func OnceCloser(c io.Closer) io.Closer

OnceCloser returns a closer that will only ignore duplicate closes.

func ParseSnapshotPath 

func ParseSnapshotPath(s string) (index int, err error)

ParseSnapshotPath parses the index from a snapshot filename. Used by path-based replicas.

func ParseWALSegmentPath 

func ParseWALSegmentPath(s string) (index int, offset int64, err error)

ParseWALSegmentPath parses the index/offset from a segment filename. Used by path-based replicas.

func TruncateDuration 

func TruncateDuration(d time.Duration) time.Duration

TruncateDuration truncates d to the nearest major unit (s, ms, µs, ns).

func WriteFile 

func WriteFile(name string, data []byte, perm os.FileMode, uid, gid int) error

WriteFile writes data to a named file and sets the mode & uid/gid.

Types

type FileEvent 

type FileEvent struct {
	Name string
	Mask int
}

FileEvent represents an event on a watched file.

type FileWatcher 

type FileWatcher interface {
	Open() error
	Close() error

	// Returns a channel of events for watched files.
	Events() <-chan FileEvent

	// Adds a specific file to be watched.
	Watch(filename string) error

	// Removes a specific file from being watched.
	Unwatch(filename string) error
}

FileWatcher represents a watcher of file events.

func NewFileWatcher 

func NewFileWatcher() FileWatcher

NewFileWatcher returns an instance of InotifyFileWatcher on Linux systems.

type InotifyFileWatcher 

type InotifyFileWatcher struct {
	// contains filtered or unexported fields
}

InotifyFileWatcher watches files and is notified of events on them.

Watcher code based on https://github.com/fsnotify/fsnotify

func NewInotifyFileWatcher 

func NewInotifyFileWatcher() *InotifyFileWatcher

NewInotifyFileWatcher returns a new instance of InotifyFileWatcher.

func (*InotifyFileWatcher) Close 

func (w *InotifyFileWatcher) Close() (err error)

Close stops watching for file events and cleans up resources.

func (*InotifyFileWatcher) Events 

func (w *InotifyFileWatcher) Events() <-chan FileEvent

Events returns a read-only channel of file events.

func (*InotifyFileWatcher) Open 

func (w *InotifyFileWatcher) Open() (err error)

Open initializes the watcher and begins listening for file events.

func (*InotifyFileWatcher) Unwatch 

func (w *InotifyFileWatcher) Unwatch(filename string) error

Unwatch stops watching the given file or directory.

func (*InotifyFileWatcher) Watch 

func (w *InotifyFileWatcher) Watch(filename string) error

Watch begins watching the given file or directory.

type LockingBuffer 

type LockingBuffer struct {
	// contains filtered or unexported fields
}

LockingBuffer wraps a bytes.Buffer with a mutex.

func (*LockingBuffer) Bytes 

func (b *LockingBuffer) Bytes() []byte

func (*LockingBuffer) Cap 

func (b *LockingBuffer) Cap() int

func (*LockingBuffer) Grow 

func (b *LockingBuffer) Grow(n int)

func (*LockingBuffer) Len 

func (b *LockingBuffer) Len() int

func (*LockingBuffer) Next 

func (b *LockingBuffer) Next(n int) []byte

func (*LockingBuffer) Read 

func (b *LockingBuffer) Read(p []byte) (n int, err error)

func (*LockingBuffer) ReadByte 

func (b *LockingBuffer) ReadByte() (byte, error)

func (*LockingBuffer) ReadBytes 

func (b *LockingBuffer) ReadBytes(delim byte) (line []byte, err error)

func (*LockingBuffer) ReadFrom 

func (b *LockingBuffer) ReadFrom(r io.Reader) (n int64, err error)

func (*LockingBuffer) ReadRune 

func (b *LockingBuffer) ReadRune() (r rune, size int, err error)

func (*LockingBuffer) ReadString 

func (b *LockingBuffer) ReadString(delim byte) (line string, err error)

func (*LockingBuffer) Reset 

func (b *LockingBuffer) Reset()

func (*LockingBuffer) String 

func (b *LockingBuffer) String() string

func (*LockingBuffer) Truncate 

func (b *LockingBuffer) Truncate(n int)

func (*LockingBuffer) UnreadByte 

func (b *LockingBuffer) UnreadByte() error

func (*LockingBuffer) UnreadRune 

func (b *LockingBuffer) UnreadRune() error

func (*LockingBuffer) Write 

func (b *LockingBuffer) Write(p []byte) (n int, err error)

func (*LockingBuffer) WriteByte 

func (b *LockingBuffer) WriteByte(c byte) error

func (*LockingBuffer) WriteRune 

func (b *LockingBuffer) WriteRune(r rune) (n int, err error)

func (*LockingBuffer) WriteString 

func (b *LockingBuffer) WriteString(s string) (n int, err error)

func (*LockingBuffer) WriteTo 

func (b *LockingBuffer) WriteTo(w io.Writer) (n int64, err error)

type MultiReadCloser 

type MultiReadCloser struct {
	// contains filtered or unexported fields
}

MultiReadCloser is a logical concatenation of io.ReadCloser. It works like io.MultiReader except all objects are closed when Close() is called.

func NewMultiReadCloser 

func NewMultiReadCloser(a []io.ReadCloser) *MultiReadCloser

NewMultiReadCloser returns a new instance of MultiReadCloser.

func (*MultiReadCloser) Close 

func (mrc *MultiReadCloser) Close() (err error)

Close closes all underlying ReadClosers and returns first error encountered.

func (*MultiReadCloser) Read 

func (mrc *MultiReadCloser) Read(p []byte) (n int, err error)

Read reads from the next available reader.

type ReadCloser 

type ReadCloser struct {
	// contains filtered or unexported fields
}

ReadCloser wraps a reader to also attach a separate closer.

func NewReadCloser 

func NewReadCloser(r io.Reader, c io.Closer) *ReadCloser

NewReadCloser returns a new instance of ReadCloser.

func (*ReadCloser) Close 

func (r *ReadCloser) Close() error

Close closes the reader (if implementing io.ReadCloser) and the Closer.

func (*ReadCloser) Read 

func (r *ReadCloser) Read(p []byte) (n int, err error)

Read reads bytes into the underlying reader.

type ReadCounter added in v0.3.5 

type ReadCounter struct {
	// contains filtered or unexported fields
}

ReadCounter wraps an io.Reader and counts the total number of bytes read.

func NewReadCounter added in v0.3.5 

func NewReadCounter(r io.Reader) *ReadCounter

NewReadCounter returns a new instance of ReadCounter that wraps r.

func (*ReadCounter) N added in v0.3.5 

func (r *ReadCounter) N() int64

N returns the total number of bytes read.

func (*ReadCounter) Read added in v0.3.5 

func (r *ReadCounter) Read(p []byte) (int, error)

Read reads from the underlying reader into p and adds the bytes read to the counter.

Source Files

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