watcher

Documentation

Index

• Variables
• func New(ctx context.Context, c *Config) (*serviceImpl, error)
• func NewFilesystemWatcher(ctx context.Context, config *FilesystemConfig) (*filesystemWatcher, error)
• func NewMinioWatcher(ctx context.Context, config *MinioConfig) (*minioWatcher, error)
• type BlobEvent
  • func NewBlobEvent(w Watcher, key string) *BlobEvent
  • func NewBlobEventWithBucket(w Watcher, bucket, key string) *BlobEvent
  • func (e BlobEvent) String() string
• type Config
• type FilesystemConfig
• type MinioConfig
• type MinioEvent
  • func (e MinioEvent) String() string
• type MinioEventS3
• type MinioEventS3Bucket
• type MinioEventS3Object
• type Service
• type Watcher

Variables

var ErrWatchTimeout = errors.New("watcher timed out")

Functions

func New

func New(ctx context.Context, c *Config) (*serviceImpl, error)

func NewFilesystemWatcher

func NewFilesystemWatcher(ctx context.Context, config *FilesystemConfig) (*filesystemWatcher, error)

func NewMinioWatcher

func NewMinioWatcher(ctx context.Context, config *MinioConfig) (*minioWatcher, error)

Types

type BlobEvent

type BlobEvent struct {
	// Name of the watcher that received this blob.
	WatcherName string

	// Name of the pipeline that the watcher targets.
	PipelineName string

	// Retention period for this blob.
	RetentionPeriod *time.Duration

	// Whether the top-level directory is meant to be stripped.
	StripTopLevelDir bool

	// Key of the blob.
	Key string

	// Bucket where the blob lives.
	Bucket string `json:"Bucket,omitempty"`
}

BlobEvent is a serializable event that describes a blob.

BlobEvent can be sent over the wire, i.e. they're serializable. Receivers, typicially Cadence activities, can download the blob via the service implementation in this package.

TODO: use signed URLs to simplify access to buckets?

func NewBlobEvent

func NewBlobEvent(w Watcher, key string) *BlobEvent

func NewBlobEventWithBucket

func NewBlobEventWithBucket(w Watcher, bucket, key string) *BlobEvent

func (BlobEvent) String

func (e BlobEvent) String() string

type Config

type Config struct {
	Filesystem []*FilesystemConfig
	Minio      []*MinioConfig
}

type FilesystemConfig

type FilesystemConfig struct {
	Name    string
	Path    string
	Inotify bool

	Pipeline         string
	RetentionPeriod  *time.Duration
	StripTopLevelDir bool
}

See filesystem.go for more.

type MinioConfig

type MinioConfig struct {
	Name         string
	RedisAddress string
	RedisList    string
	Region       string
	Endpoint     string
	PathStyle    bool
	Profile      string
	Key          string
	Secret       string
	Token        string

	Pipeline         string
	RetentionPeriod  *time.Duration
	StripTopLevelDir bool
}

See minio.go for more.

type MinioEvent

type MinioEvent struct {
	Name string       `json:"eventName"`
	S3   MinioEventS3 `json:"s3"`
}

MinioEvent represents the event delivered by Minio (S3) via Redis.

For reference:

{
    "eventVersion": "2.0",
    "eventSource": "minio:s3",
    "awsRegion": "",
    "eventTime": "2019-10-01T15:28:22Z",
    "eventName": "s3:ObjectCreated:CompleteMultipartUpload",
    "userIdentity": {
        "principalId": "36J9X8EZI4KEV1G7EHXA"
    },
    "requestParameters": {
        "accessKey": "36J9X8EZI4KEV1G7EHXA",
        "region": "",
        "sourceIPAddress": "172.20.0.1"
    },
    "responseElements": {
        "content-length": "291",
        "x-amz-request-id": "15C98F7AC9D60CA6",
        "x-minio-deployment-id": "bcc2f9ce-65f2-4558-a455-b8176012f89b",
        "x-minio-origin-endpoint": "http://172.20.0.5:9000"
    },
    "s3": {
        "s3SchemaVersion": "1.0",
        "configurationId": "Config",
        "bucket": {
            "name": "sips",
            "ownerIdentity": {
                "principalId": "36J9X8EZI4KEV1G7EHXA"
            },
            "arn": "arn:aws:s3:::sips"
        },
        "object": {
            "key": "y25.gif",
            "size": 100,
            "eTag": "b0814df70de0779da2b0b3f9c676c64d-1",
            "contentType": "image/gif",
            "userMetadata": {
                "X-Minio-Internal-actual-size": "100",
                "content-type": "image/gif"
            },
            "versionId": "1",
            "sequencer": "15C98F7ACA94598C"
        }
    },
    "source": {
        "host": "172.20.0.1",
        "port": "",
        "userAgent": "MinIO (linux; amd64) minio-go/v6.0.32 mc/DEVELOPMENT.GOGET"
    }
}

func (MinioEvent) String

func (e MinioEvent) String() string

type MinioEventS3

type MinioEventS3 struct {
	Bucket MinioEventS3Bucket `json:"bucket"`
	Object MinioEventS3Object `json:"object"`
}

type MinioEventS3Bucket

type MinioEventS3Bucket struct {
	Name string `json:"name"`
}

type MinioEventS3Object

type MinioEventS3Object struct {
	Key string `json:"key"`
}

type Service

type Service interface {
	// Watchers return all known watchers.
	Watchers() []Watcher

	// Download blob given an event.
	Download(ctx context.Context, w io.Writer, e *BlobEvent) error

	// Delete blob given an event.
	Delete(ctx context.Context, e *BlobEvent) error
}

type Watcher

type Watcher interface {
	// Watch waits until a blob is dispatched.
	Watch(ctx context.Context) (*BlobEvent, error)

	// OpenBucket returns the bucket where the blobs can be found.
	OpenBucket(ctx context.Context, event *BlobEvent) (*blob.Bucket, error)

	// Every watcher targets a pipeline.
	Pipeline() string

	RetentionPeriod() *time.Duration

	StripTopLevelDir() bool

	fmt.Stringer // It should return the name of the watcher.
}