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destination.go
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destination.go
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// Copyright © 2022 Meroxa, Inc & Yalantis.
//
// 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 destination
import (
"context"
"database/sql"
"fmt"
sdk "github.com/conduitio/conduit-connector-sdk"
"github.com/conduitio-labs/conduit-connector-db2/config"
"github.com/conduitio-labs/conduit-connector-db2/destination/writer"
_ "github.com/ibmdb/go_ibm_db" //nolint:revive,nolintlint
)
// Destination DB2 Connector persists records to a db2 database.
type Destination struct {
sdk.UnimplementedDestination
writer Writer
config config.Config
}
// New creates new instance of the Destination.
func New() sdk.Destination {
return &Destination{}
}
// Parameters returns a map of named sdk.Parameters that describe how to configure the Destination.
func (d *Destination) Parameters() map[string]sdk.Parameter {
return map[string]sdk.Parameter{
config.KeyConnection: {
Description: "Connection string to DB2",
Required: true,
Default: "",
},
config.KeyTable: {
Description: "Name of the table that the connector should write to.",
Required: true,
Default: "",
},
}
}
// Configure parses and initializes the config.
func (d *Destination) Configure(_ context.Context, cfg map[string]string) error {
configuration, err := config.Parse(cfg)
if err != nil {
return fmt.Errorf("parse config: %w", err)
}
d.config = configuration
return nil
}
// Open makes sure everything is prepared to receive records.
func (d *Destination) Open(ctx context.Context) error {
db, err := sql.Open("go_ibm_db", d.config.Connection)
if err != nil {
return fmt.Errorf("connect to db2: %w", err)
}
if err = db.PingContext(ctx); err != nil {
return fmt.Errorf("ping db2: %w", err)
}
d.writer, err = writer.NewWriter(ctx, writer.Params{
DB: db,
Table: d.config.Table,
})
if err != nil {
return fmt.Errorf("new writer: %w", err)
}
return nil
}
// Write writes a record into a Destination.
func (d *Destination) Write(ctx context.Context, records []sdk.Record) (int, error) {
for i, record := range records {
err := sdk.Util.Destination.Route(ctx, record,
d.writer.Insert,
d.writer.Update,
d.writer.Delete,
d.writer.Insert,
)
if err != nil {
return i, fmt.Errorf("route %s: %w", record.Operation.String(), err)
}
}
return len(records), nil
}
// Teardown gracefully closes connections.
func (d *Destination) Teardown(ctx context.Context) error {
if d.writer != nil {
return d.writer.Close(ctx)
}
return nil
}