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common.go
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common.go
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// 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 mongodbio contains transforms for reading from and writing to MongoDB.
package mongodbio
import (
"context"
"fmt"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/mongo/readpref"
)
const (
bsonTag = "bson"
)
type mongoDBFn struct {
URI string
Database string
Collection string
client *mongo.Client
collection *mongo.Collection
}
func (fn *mongoDBFn) Setup(ctx context.Context) error {
client, err := newClient(ctx, fn.URI)
if err != nil {
return err
}
fn.client = client
fn.collection = client.Database(fn.Database).Collection(fn.Collection)
return nil
}
func newClient(ctx context.Context, uri string) (*mongo.Client, error) {
opts := options.Client().ApplyURI(uri)
client, err := mongo.Connect(ctx, opts)
if err != nil {
return nil, fmt.Errorf("error connecting to MongoDB: %w", err)
}
if err := client.Ping(ctx, readpref.Primary()); err != nil {
return nil, fmt.Errorf("error pinging MongoDB: %w", err)
}
return client, nil
}
func (fn *mongoDBFn) Teardown(ctx context.Context) error {
if err := fn.client.Disconnect(ctx); err != nil {
return fmt.Errorf("error disconnecting from MongoDB: %w", err)
}
return nil
}