/
common.go
76 lines (64 loc) · 2.24 KB
/
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 spannerio provides an API for reading and writing resouces to
// Google Spanner datastores.
package spannerio
import (
"context"
"fmt"
"cloud.google.com/go/spanner"
"google.golang.org/api/option"
"google.golang.org/api/option/internaloption"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
)
type spannerFn struct {
Database string `json:"database"` // Database is the spanner connection string
TestEndpoint string // Optional endpoint override for local testing. Not required for production pipelines.
client *spanner.Client // Spanner Client
}
func newSpannerFn(db string) spannerFn {
if db == "" {
panic("database not provided!")
}
return spannerFn{
Database: db,
}
}
func (f *spannerFn) Setup(ctx context.Context) error {
if f.client == nil {
var opts []option.ClientOption
// Append emulator options assuming endpoint is local (for testing).
if f.TestEndpoint != "" {
opts = []option.ClientOption{
option.WithEndpoint(f.TestEndpoint),
option.WithGRPCDialOption(grpc.WithTransportCredentials(insecure.NewCredentials())),
option.WithoutAuthentication(),
internaloption.SkipDialSettingsValidation(),
}
}
client, err := spanner.NewClient(ctx, f.Database, opts...)
if err != nil {
return fmt.Errorf("failed to initialise Spanner client: %v", err)
}
f.client = client
}
return nil
}
func (f *spannerFn) Teardown() {
if f.client != nil {
f.client.Close()
}
}