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代码示例

C#

如需了解如何安装和使用 Live Stream API 客户端库，请参阅 Live Stream API 客户端库。如需了解详情，请参阅 Live Stream API C# API 参考文档。

如需向 Live Stream API 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。


using Google.Cloud.Video.LiveStream.V1;
using Google.LongRunning;
using Google.Protobuf.WellKnownTypes;
using System.Threading.Tasks;

public class UpdateChannelSample
{
    public async Task<Channel> UpdateChannelAsync(
         string projectId, string locationId, string channelId, string inputId)
    {
        // Create the client.
        LivestreamServiceClient client = LivestreamServiceClient.Create();

        InputAttachment inputAttachment = new InputAttachment
        {
            Key = "updated-input",
            InputAsInputName = InputName.FromProjectLocationInput(projectId, locationId, inputId)
        };

        UpdateChannelRequest request = new UpdateChannelRequest
        {
            Channel = new Channel
            {
                ChannelName = ChannelName.FromProjectLocationChannel(projectId, locationId, channelId),
                InputAttachments = { inputAttachment }
            },
            UpdateMask = new FieldMask { Paths = { "input_attachments" } }
        };

        // Make the request.
        Operation<Channel, OperationMetadata> response = await client.UpdateChannelAsync(request);

        // Poll until the returned long-running operation is complete.
        Operation<Channel, OperationMetadata> completedResponse = await response.PollUntilCompletedAsync();

        // Retrieve the operation result.
        return completedResponse.Result;
    }
}

Go

如需了解如何安装和使用 Live Stream API 客户端库，请参阅 Live Stream API 客户端库。如需了解详情，请参阅 Live Stream API Go API 参考文档。

如需向 Live Stream API 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。

import (
	"context"
	"fmt"
	"io"

	livestream "cloud.google.com/go/video/livestream/apiv1"
	"cloud.google.com/go/video/livestream/apiv1/livestreampb"
	"google.golang.org/protobuf/types/known/fieldmaskpb"
)

// updateChannel updates an existing channel with a different input.
func updateChannel(w io.Writer, projectID, location, channelID, inputID string) error {
	// projectID := "my-project-id"
	// location := "us-central1"
	// channelID := "my-channel"
	// inputID := "my-updated-input"
	ctx := context.Background()
	client, err := livestream.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("NewClient: %w", err)
	}
	defer client.Close()

	req := &livestreampb.UpdateChannelRequest{
		Channel: &livestreampb.Channel{
			Name: fmt.Sprintf("projects/%s/locations/%s/channels/%s", projectID, location, channelID),
			InputAttachments: []*livestreampb.InputAttachment{
				{
					Key:   "updated-input",
					Input: fmt.Sprintf("projects/%s/locations/%s/inputs/%s", projectID, location, inputID),
				},
			},
		},
		UpdateMask: &fieldmaskpb.FieldMask{
			Paths: []string{
				"input_attachments",
			},
		},
	}
	// Updates the input.
	op, err := client.UpdateChannel(ctx, req)
	if err != nil {
		return fmt.Errorf("UpdateChannel: %w", err)
	}
	response, err := op.Wait(ctx)
	if err != nil {
		return fmt.Errorf("Wait: %w", err)
	}

	fmt.Fprintf(w, "Updated channel: %v", response.Name)
	return nil
}

Java

如需了解如何安装和使用 Live Stream API 客户端库，请参阅 Live Stream API 客户端库。如需了解详情，请参阅 Live Stream API Java API 参考文档。

如需向 Live Stream API 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。


import com.google.cloud.video.livestream.v1.Channel;
import com.google.cloud.video.livestream.v1.ChannelName;
import com.google.cloud.video.livestream.v1.InputAttachment;
import com.google.cloud.video.livestream.v1.InputName;
import com.google.cloud.video.livestream.v1.LivestreamServiceClient;
import com.google.cloud.video.livestream.v1.UpdateChannelRequest;
import com.google.protobuf.FieldMask;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class UpdateChannel {

  public static void main(String[] args) throws Exception {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "my-project-id";
    String location = "us-central1";
    String channelId = "my-channel-id";
    String inputId = "my-input-id";

    updateChannel(projectId, location, channelId, inputId);
  }

  public static void updateChannel(
      String projectId, String location, String channelId, String inputId)
      throws InterruptedException, ExecutionException, TimeoutException, IOException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the "close" method on the client to safely clean up any remaining background resources.
    LivestreamServiceClient livestreamServiceClient = LivestreamServiceClient.create();
    var updateChannelRequest =
        UpdateChannelRequest.newBuilder()
            .setChannel(
                Channel.newBuilder()
                    .setName(ChannelName.of(projectId, location, channelId).toString())
                    .addInputAttachments(
                        0,
                        InputAttachment.newBuilder()
                            .setKey("updated-input")
                            .setInput(InputName.of(projectId, location, inputId).toString())
                            .build()))
            .setUpdateMask(FieldMask.newBuilder().addPaths("input_attachments").build())
            .build();
    // First API call in a project can take up to 10 minutes.
    Channel result =
        livestreamServiceClient
            .updateChannelAsync(updateChannelRequest)
            .get(10, TimeUnit.MINUTES);
    System.out.println("Updated channel: " + result.getName());
    livestreamServiceClient.close();
  }
}

Node.js

如需了解如何安装和使用 Live Stream API 客户端库，请参阅 Live Stream API 客户端库。如需了解详情，请参阅 Live Stream API Node.js API 参考文档。

如需向 Live Stream API 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// projectId = 'my-project-id';
// location = 'us-central1';
// channelId = 'my-channel';
// inputId = 'my-input';

// Imports the Livestream library
const {LivestreamServiceClient} = require('@google-cloud/livestream').v1;

// Instantiates a client
const livestreamServiceClient = new LivestreamServiceClient();

async function updateChannel() {
  // Construct request
  const request = {
    channel: {
      name: livestreamServiceClient.channelPath(
        projectId,
        location,
        channelId
      ),
      inputAttachments: [
        {
          key: 'updated-input',
          input: livestreamServiceClient.inputPath(
            projectId,
            location,
            inputId
          ),
        },
      ],
    },
    updateMask: {
      paths: ['input_attachments'],
    },
  };

  // Run request
  const [operation] = await livestreamServiceClient.updateChannel(request);
  const response = await operation.promise();
  const [channel] = response;
  console.log(`Updated channel: ${channel.name}`);
}

updateChannel();

PHP

如需了解如何安装和使用 Live Stream API 客户端库，请参阅 Live Stream API 客户端库。如需了解详情，请参阅 Live Stream API PHP API 参考文档。

如需向 Live Stream API 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。

use Google\Cloud\Video\LiveStream\V1\Channel;
use Google\Cloud\Video\LiveStream\V1\InputAttachment;
use Google\Cloud\Video\LiveStream\V1\Client\LivestreamServiceClient;
use Google\Cloud\Video\LiveStream\V1\UpdateChannelRequest;
use Google\Protobuf\FieldMask;

/**
 * Updates an existing channel with a different input.
 *
 * @param string  $callingProjectId   The project ID to run the API call under
 * @param string  $location           The location of the channel and the input
 * @param string  $channelId          The ID of the channel to be updated
 * @param string  $inputId            The ID of the existing input
 */
function update_channel(
    string $callingProjectId,
    string $location,
    string $channelId,
    string $inputId
): void {
    // Instantiate a client.
    $livestreamClient = new LivestreamServiceClient();

    $channelName = $livestreamClient->channelName($callingProjectId, $location, $channelId);
    $inputName = $livestreamClient->inputName($callingProjectId, $location, $inputId);

    $inputAttachment = (new InputAttachment())
        ->setKey('updated-input')
        ->setInput($inputName);
    $channel = (new Channel())
        ->setName($channelName)
        ->setInputAttachments([$inputAttachment]);

    $updateMask = new FieldMask([
        'paths' => ['input_attachments']
    ]);

    // Run the channel update request. The response is a long-running operation ID.
    $request = (new UpdateChannelRequest())
        ->setChannel($channel)
        ->setUpdateMask($updateMask);
    $operationResponse = $livestreamClient->updateChannel($request);

    $operationResponse->pollUntilComplete();
    if ($operationResponse->operationSucceeded()) {
        $result = $operationResponse->getResult();
        // Print results
        printf('Updated channel: %s' . PHP_EOL, $result->getName());
    } else {
        $error = $operationResponse->getError();
        // handleError($error)
    }
}

Python

如需了解如何安装和使用 Live Stream API 客户端库，请参阅 Live Stream API 客户端库。如需了解详情，请参阅 Live Stream API Python API 参考文档。

如需向 Live Stream API 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。


import argparse

from google.cloud.video import live_stream_v1
from google.cloud.video.live_stream_v1.services.livestream_service import (
    LivestreamServiceClient,
)
from google.protobuf import field_mask_pb2 as field_mask


def update_channel(
    project_id: str, location: str, channel_id: str, input_id: str
) -> live_stream_v1.types.Channel:
    """Updates a channel.
    Args:
        project_id: The GCP project ID.
        location: The location of the channel.
        channel_id: The user-defined channel ID.
        input_id: The user-defined input ID for the new input."""

    client = LivestreamServiceClient()
    input = f"projects/{project_id}/locations/{location}/inputs/{input_id}"
    name = f"projects/{project_id}/locations/{location}/channels/{channel_id}"

    channel = live_stream_v1.types.Channel(
        name=name,
        input_attachments=[
            live_stream_v1.types.InputAttachment(
                key="updated-input",
                input=input,
            ),
        ],
    )
    update_mask = field_mask.FieldMask(paths=["input_attachments"])

    operation = client.update_channel(channel=channel, update_mask=update_mask)
    response = operation.result(600)
    print(f"Updated channel: {response.name}")

    return response

Ruby

如需了解如何安装和使用 Live Stream API 客户端库，请参阅 Live Stream API 客户端库。如需了解详情，请参阅 Live Stream API Ruby API 参考文档。

如需向 Live Stream API 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。

require "google/cloud/video/live_stream"

##
# Update a channel
#
# @param project_id [String] Your Google Cloud project (e.g. "my-project")
# @param location [String] The location (e.g. "us-central1")
# @param channel_id [String] Your channel name (e.g. "my-channel")
# @param input_id [String] The input name to update the channel with (e.g. "my-updated-input")
#
def update_channel project_id:, location:, channel_id:, input_id:
  # Create a Live Stream client.
  client = Google::Cloud::Video::LiveStream.livestream_service

  # Build the resource name of the channel.
  name = client.channel_path project: project_id, location: location, channel: channel_id

  # Build the resource name of the input.
  input = client.input_path project: project_id, location: location, input: input_id

  # Set the update mask.
  update_mask = { paths: ["input_attachments"] }

  # Update the channel input_attachments config field.
  update_channel = {
    name: name,
    input_attachments: [
      {
        key: "updated-input",
        input: input
      }
    ]
  }

  operation = client.update_channel update_mask: update_mask, channel: update_channel

  # The returned object is of type Gapic::Operation. You can use this
  # object to check the status of an operation, cancel it, or wait
  # for results. Here is how to block until completion:
  operation.wait_until_done!

  # Print the channel name.
  puts "Updated channel: #{operation.response.name}"
  puts "Updated input_attachments config: #{operation.response.input_attachments[0].key}"
end

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。