[GitHub] [beam] pskevin commented on a change in pull request #12667: [BEAM-9918] Adding tests and documentation to xlang components

[GitBox <gi...@apache.org>]

pskevin commented on a change in pull request #12667:
URL: https://github.com/apache/beam/pull/12667#discussion_r475027685



##########
File path: sdks/go/examples/xlang/group_by/group_by.go
##########
@@ -0,0 +1,109 @@
+// 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.
+
+// group_by exemplifies using a cross-language group by key transform from a test expansion service.
+//
+// Prerequisites to run wordcount:
+// –> [Required] Job needs to be submitted to a portable runner (--runner=universal)
+// –> [Required] Endpoint of job service needs to be passed (--endpoint=<ip:port>)
+// –> [Required] Endpoint of expansion service needs to be passed (--expansion_addr=<ip:port>)
+// –> [Optional] Environment type can be LOOPBACK. Defaults to DOCKER. (--environment_type=LOOPBACK|DOCKER)
+package main
+
+import (
+	"fmt"
+	"reflect"
+	"sort"
+
+	"github.com/apache/beam/sdks/go/pkg/beam/core/util/reflectx"
+	"github.com/apache/beam/sdks/go/pkg/beam/testing/passert"
+
+	"context"
+	"flag"
+	"log"
+
+	"github.com/apache/beam/sdks/go/pkg/beam"
+	"github.com/apache/beam/sdks/go/pkg/beam/core/typex"
+
+	"github.com/apache/beam/sdks/go/pkg/beam/x/beamx"

Review comment:
       Ack. Updated!




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