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context.go
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context.go
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/*
* Copyright (c) 2019-2021. Abstrium SAS <team (at) pydio.com>
* This file is part of Pydio Cells.
*
* Pydio Cells is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Pydio Cells is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with Pydio Cells. If not, see <http://www.gnu.org/licenses/>.
*
* The latest code can be found at <https://pydio.com>.
*/
// Package servicecontext performs context values read/write, generally through server or client wrappers
package servicecontext
import (
"context"
"github.com/pydio/cells/v4/common/runtime"
"github.com/pydio/cells/v4/common/broker"
"github.com/pydio/cells/v4/common/crypto"
"github.com/pydio/cells/v4/common/dao"
"github.com/pydio/cells/v4/common/registry"
)
type contextType int
const (
serviceNameKey contextType = iota
operationIDKey
operationLabelKey
daoKey
indexerKey
keyringKey
loggerKey
brokerKey
registryKey
ContextMetaJobUuid = "X-Pydio-Job-Uuid"
ContextMetaTaskUuid = "X-Pydio-Task-Uuid"
ContextMetaTaskActionPath = "X-Pydio-Task-Action-Path"
ContextMetaTaskActionTags = "X-Pydio-Task-Action-Tags"
)
func init() {
runtime.RegisterContextInjector(func(ctx, parent context.Context) context.Context {
if s := GetServiceName(parent); s != "" {
ctx = WithServiceName(ctx, s)
}
return WithRegistry(ctx, GetRegistry(parent))
})
}
// WithServiceName returns a context which knows its service name
func WithServiceName(ctx context.Context, serviceName string) context.Context {
return context.WithValue(ctx, serviceNameKey, serviceName)
}
// WithOperationID returns a context which knows its session ID
func WithOperationID(ctx context.Context, operationID string, operationLabel ...string) context.Context {
c := context.WithValue(ctx, operationIDKey, operationID)
if len(operationLabel) > 0 {
c = context.WithValue(c, operationLabelKey, operationLabel[0])
}
return c
}
// WithDAO links a dao to the context
func WithDAO(ctx context.Context, dao dao.DAO) context.Context {
return context.WithValue(ctx, daoKey, dao)
}
// WithIndexer links a dao for indexation to the context
func WithIndexer(ctx context.Context, dao dao.DAO) context.Context {
return context.WithValue(ctx, indexerKey, dao)
}
// WithLogger links a logger to the context
func WithLogger(ctx context.Context, logger interface{}) context.Context {
return context.WithValue(ctx, loggerKey, logger)
}
// WithKeyring passes a keyring in context
func WithKeyring(ctx context.Context, keyring crypto.Keyring) context.Context {
return context.WithValue(ctx, keyringKey, keyring)
}
// WithBroker links a broker to the context
func WithBroker(ctx context.Context, bkr broker.Broker) context.Context {
return context.WithValue(ctx, brokerKey, bkr)
}
// WithRegistry links a registry to the context
func WithRegistry(ctx context.Context, reg registry.Registry) context.Context {
return context.WithValue(ctx, registryKey, reg)
}
// GetServiceName returns the service name associated to this context
func GetServiceName(ctx context.Context) string {
if name, ok := ctx.Value(serviceNameKey).(string); ok {
return name
}
return ""
}
// GetOperationID returns the session id associated to this context
func GetOperationID(ctx context.Context) (string, string) {
if id, ok := ctx.Value(operationIDKey).(string); ok {
var label string
if l, o := ctx.Value(operationLabelKey).(string); o {
label = l
}
return id, label
}
return "", ""
}
// GetDAO returns the dao from the context in argument
func GetDAO(ctx context.Context) dao.DAO {
if db, ok := ctx.Value(daoKey).(dao.DAO); ok {
return db
}
return nil
}
// GetIndexer returns the dao for indexing from the context in argument
func GetIndexer(ctx context.Context) dao.DAO {
if db, ok := ctx.Value(indexerKey).(dao.DAO); ok {
return db
}
return nil
}
// GetLogger tries to find a logger in context
func GetLogger(ctx context.Context) interface{} {
return ctx.Value(loggerKey)
}
// GetBroker returns the broker from the context in argument
func GetBroker(ctx context.Context) broker.Broker {
if conf, ok := ctx.Value(brokerKey).(broker.Broker); ok {
return conf
}
return nil
}
// GetRegistry returns the registry from the context in argument
func GetRegistry(ctx context.Context) registry.Registry {
if conf, ok := ctx.Value(registryKey).(registry.Registry); ok {
return conf
}
return nil
}
// GetKeyring returns the keyring from the context in argument
func GetKeyring(ctx context.Context) crypto.Keyring {
if keyring, ok := ctx.Value(keyringKey).(crypto.Keyring); ok {
return keyring
}
return nil
}