jrmccluskey commented on a change in pull request #15253: URL: https://github.com/apache/beam/pull/15253#discussion_r680165494
########## File path: sdks/go/pkg/beam/testing/teststream/teststream.go ########## @@ -0,0 +1,131 @@ +// 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 teststream contains code configuring the TestStream primitive for +// use in testing code that is meant to be run on streaming data sources. +// TestStream is not supported on the Go direct runner. +package teststream + +import ( + "bytes" + "fmt" + + "github.com/apache/beam/sdks/go/pkg/beam" + "github.com/apache/beam/sdks/go/pkg/beam/core/graph/coder" + "github.com/apache/beam/sdks/go/pkg/beam/core/graph/mtime" + "github.com/apache/beam/sdks/go/pkg/beam/core/util/protox" + + pipepb "github.com/apache/beam/sdks/go/pkg/beam/model/pipeline_v1" +) + +const urn = "beam:transform:teststream:v1" + +// Config holds information used to create a TestStreamPayload object. +type Config struct { + ElmCoder *coder.Coder + Events []*pipepb.TestStreamPayload_Event + Endpoint *pipepb.ApiServiceDescriptor + Watermark int64 +} + +// MakeConfig initializes a Config struct to begin inserting TestStream events/endpoints into. +// Requires that users provide the coder for the elements they are trying to emit. +func MakeConfig(c *coder.Coder) Config { + return Config{ElmCoder: c, + Events: []*pipepb.TestStreamPayload_Event{}, + Endpoint: &pipepb.ApiServiceDescriptor{}, + Watermark: 0, + } +} + +// SetEndpoint sets a URL for a TestStreamService that will emit events instead of having them +// defined manually. Currently does not support authentication, so the TestStreamService should +// be accessed in a trusted context. +func (c *Config) SetEndpoint(url string) { Review comment: I suppose someone setting an endpoint will not be manually adding elements so taking a coder here isn't the end of the world. Or we could provide a SetCoder() function and have a check here to enforce that the config's elmCoder field is non-null so that it fails at build-time if there's a problem. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
