meta

package

v2.3.2+incompatible Latest Latest Go to latest Published: Jul 28, 2021 License: AGPL-3.0 Imports: 7 Imported by: 0

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Valid go.mod file
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gitproxy.zycloud.tk/pydio/cells

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README ¶

Meta Service

A central storage for all nodes metadata.

API

Metadata are stored JSON-serialized and associated to nodes UUID. This service is not indexed (except by node UUID). See the Search service if you need to make metadata queryable.

This service provides two handlers:

GRPC: for internal communication
HTTP API: for setting/reading meta from the clients.

TODO: Later should be transformed to a REST service.

Events

Meta service publishes the following NodeChange events to the topic common.TOPIC_META_CHANGES :

NodeChangeEvent_UPDATE_META
NodeChangeEvent_DELETE

Meta service is subscribing to the following NodeChange events on topic common.TOPIC_TREE_CHANGES

NodeChangeEvent_CREATE : extract meta from node and store it
NodeChangeEvent_UPDATE_PATH : same
NodeChangeEvent_UPDATE_META : same
NodeChangeEvent_DELETE : remove all metadata stored for this node

Storage

Storage is currently implemented in SQL, providing both MySQL and Sqlite implementations.

Documentation ¶

Overview ¶

Package meta provides storage for files and folders metadata.

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func NewDAO ¶

func NewDAO(o dao.DAO) dao.DAO

Types ¶

type DAO ¶

type DAO interface {
	dao.DAO

	SetMetadata(nodeId string, author string, metadata map[string]string) (err error)
	GetMetadata(nodeId string) (metadata map[string]string, err error)
	ListMetadata(query string) (metadataByUuid map[string]map[string]string, err error)
}

Source Files ¶

dao.go
sql.go

Directories ¶

Path	Synopsis
grpc Package meta provides a GRPC access to the underlying persistence layer for files metadata	Package meta provides a GRPC access to the underlying persistence layer for files metadata
rest Package rest provides a REST API for querying the tree metadata.	Package rest provides a REST API for querying the tree metadata.

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