expand.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 xlangx

import (
	"context"

	"github.com/apache/beam/sdks/go/pkg/beam/internal/errors"
	jobpb "github.com/apache/beam/sdks/go/pkg/beam/model/jobmanagement_v1"
	"google.golang.org/grpc"
)

// Expand queries the expansion service to resolve the ExpansionRequest
func Expand(ctx context.Context, req *jobpb.ExpansionRequest, expansionAddr string) (*jobpb.ExpansionResponse, error) {
	// Querying Expansion Service

	// Setting grpc client
	conn, err := grpc.Dial(expansionAddr, grpc.WithInsecure())
	if err != nil {
		return nil, errors.Wrapf(err, "unable to connect to expansion service at %v", expansionAddr)
	}
	defer conn.Close()
	client := jobpb.NewExpansionServiceClient(conn)

	// Handling ExpansionResponse
	res, err := client.Expand(ctx, req)
	if err != nil {
		return nil, errors.Wrapf(err, "expansion failed")
	}
	return res, nil
}