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config.go
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/*
* Copyright 2020 Dgraph Labs, Inc. and Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package admin
import (
"context"
"encoding/json"
"sync/atomic"
dgoapi "github.com/dgraph-io/dgo/v200/protos/api"
"github.com/dgraph-io/dgraph/gql"
"github.com/dgraph-io/dgraph/graphql/schema"
"github.com/dgraph-io/dgraph/worker"
"github.com/dgraph-io/dgraph/x"
"github.com/golang/glog"
)
type configResolver struct {
mutation schema.Mutation
}
type configInput struct {
LruMB float64
// Positive value of logRequest will make alpha print all the request it gets.
// To stop we should set it to a negative value, zero value is being ignored because
// that might be the case when this parameter isn't specified in query.
// It will be used like a boolean. We are keeping int32 because we want to
// modify it using atomics(atomics doesn't have support for bool).
LogRequest int32
}
func (cr *configResolver) Rewrite(
m schema.Mutation) (*gql.GraphQuery, []*dgoapi.Mutation, error) {
glog.Info("Got config request through GraphQL admin API")
cr.mutation = m
input, err := getConfigInput(m)
if err != nil {
return nil, nil, err
}
if input.LruMB > 0 {
if err = worker.UpdateLruMb(input.LruMB); err != nil {
return nil, nil, err
}
}
if input.LogRequest != 0 {
atomic.StoreInt32(&x.WorkerConfig.LogRequest, input.LogRequest)
}
return nil, nil, nil
}
func (cr *configResolver) FromMutationResult(
mutation schema.Mutation,
assigned map[string]string,
result map[string]interface{}) (*gql.GraphQuery, error) {
return nil, nil
}
func (cr *configResolver) Mutate(
ctx context.Context,
query *gql.GraphQuery,
mutations []*dgoapi.Mutation) (map[string]string, map[string]interface{}, error) {
return nil, nil, nil
}
func (cr *configResolver) Query(ctx context.Context, query *gql.GraphQuery) ([]byte, error) {
buf := writeResponse(cr.mutation, "Success", "Config updated successfully")
return buf, nil
}
func getConfigInput(m schema.Mutation) (*configInput, error) {
inputArg := m.ArgValue(schema.InputArgName)
inputByts, err := json.Marshal(inputArg)
if err != nil {
return nil, schema.GQLWrapf(err, "couldn't get input argument")
}
var input configInput
err = json.Unmarshal(inputByts, &input)
return &input, schema.GQLWrapf(err, "couldn't get input argument")
}