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serve.go
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serve.go
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// Copyright © 2022 Meroxa, Inc.
//
// 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 sdk
import (
"errors"
"fmt"
"os"
"github.com/conduitio/conduit-connector-protocol/cplugin"
"github.com/conduitio/conduit-connector-protocol/cplugin/server"
)
// Serve starts the plugin and takes care of its whole lifecycle by blocking
// until the plugin can safely stop running. Any fixable errors will be output
// to os.Stderr and the process will exit with a status code of 1. Serve will
// panic for unexpected conditions where a user's fix is unknown.
//
// It is essential that nothing gets written to stdout or stderr before this
// function is called, as the first output is used to perform the initial
// handshake.
//
// Plugins should call Serve in their main() functions.
func Serve(c Connector) {
err := serve(c)
if err != nil {
_, _ = fmt.Fprintf(os.Stderr, "error running plugin: %+v", err)
os.Exit(1)
}
}
func serve(c Connector) error {
err := initStandaloneModeLogger()
if err != nil {
return err
}
if c.NewSpecification == nil {
return errors.New("Connector.NewSpecification is a required field")
}
if c.NewSource == nil {
c.NewSource = func() Source { return nil }
}
if c.NewDestination == nil {
c.NewDestination = func() Destination { return nil }
}
return server.Serve(
func() cplugin.SpecifierPlugin {
return NewSpecifierPlugin(c.NewSpecification(), c.NewSource(), c.NewDestination())
},
func() cplugin.SourcePlugin { return NewSourcePlugin(c.NewSource()) },
func() cplugin.DestinationPlugin { return NewDestinationPlugin(c.NewDestination()) },
)
}