server/dao/kv.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 dao is a persis layer of kie
package dao

import (
	"context"
	"crypto/tls"
	"errors"
	"github.com/apache/servicecomb-kie/pkg/model"
	"github.com/apache/servicecomb-kie/server/config"
	"github.com/go-mesh/openlogging"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/mongo"
	"time"
)

var (
	ErrMissingDomain    = errors.New("domain info missing, illegal access")
	ErrKeyNotExists     = errors.New("key with labels does not exits")
	ErrLabelNotExists   = errors.New("labels does not exits")
	ErrTooMany          = errors.New("key with labels should be only one")
	ErrKeyMustNotEmpty  = errors.New("must supply key if you want to get exact one result")
	ErrRevisionNotExist = errors.New("label revision not exist")
)

type Options struct {
	URI      string
	PoolSize int
	SSL      bool
	TLS      *tls.Config
	Timeout  time.Duration
}

func NewKVService() (*MongodbService, error) {
	opts := Options{
		URI:      config.GetDB().URI,
		PoolSize: config.GetDB().PoolSize,
		SSL:      config.GetDB().SSL,
	}
	if opts.SSL {

	}
	return NewMongoService(opts)
}
func (s *MongodbService) findOneKey(ctx context.Context, filter bson.M, key string) ([]*model.KVDoc, error) {
	collection := s.c.Database(DB).Collection(CollectionKV)
	filter["key"] = key
	sr := collection.FindOne(ctx, filter)
	if sr.Err() != nil {
		return nil, sr.Err()
	}
	curKV := &model.KVDoc{}
	err := sr.Decode(curKV)
	if err != nil {
		if err == mongo.ErrNoDocuments {
			return nil, ErrKeyNotExists
		}
		openlogging.Error("decode error: " + err.Error())
		return nil, err
	}
	return []*model.KVDoc{curKV}, nil
}

//KVExist supports you query by label map or labels id
func (s *MongodbService) KVExist(ctx context.Context, domain, key string, options ...FindOption) (primitive.ObjectID, error) {
	opts := FindOptions{}
	for _, o := range options {
		o(&opts)
	}
	if opts.LabelID != "" {
		kvs, err := s.FindKVByLabelID(ctx, domain, opts.LabelID, key)
		if err != nil {
			return primitive.NilObjectID, err
		}
		return kvs[0].ID, nil
	} else {
		kvs, err := s.FindKV(ctx, domain, WithExactLabels(), WithLabels(opts.Labels), WithKey(key))
		if err != nil {
			return primitive.NilObjectID, err
		}
		if len(kvs) != 1 {
			return primitive.NilObjectID, ErrTooMany
		}

		return kvs[0].ID, nil
	}

}