Container.GetChangeFeedIterator<T> Method

Reference

Definition

Namespace:: Microsoft.Azure.Cosmos

Assembly:: Microsoft.Azure.Cosmos.Client.dll

Package:: Microsoft.Azure.Cosmos v3.39.0

Source:: Container.cs

Important

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This method creates an iterator to consume a Change Feed.

public abstract Microsoft.Azure.Cosmos.FeedIterator<T> GetChangeFeedIterator<T> (Microsoft.Azure.Cosmos.ChangeFeedStartFrom changeFeedStartFrom, Microsoft.Azure.Cosmos.ChangeFeedMode changeFeedMode, Microsoft.Azure.Cosmos.ChangeFeedRequestOptions changeFeedRequestOptions = default);

abstract member GetChangeFeedIterator : Microsoft.Azure.Cosmos.ChangeFeedStartFrom * Microsoft.Azure.Cosmos.ChangeFeedMode * Microsoft.Azure.Cosmos.ChangeFeedRequestOptions -> Microsoft.Azure.Cosmos.FeedIterator<'T>

Public MustOverride Function GetChangeFeedIterator(Of T) (changeFeedStartFrom As ChangeFeedStartFrom, changeFeedMode As ChangeFeedMode, Optional changeFeedRequestOptions As ChangeFeedRequestOptions = Nothing) As FeedIterator(Of T)

Type Parameters

T

Parameters

changeFeedStartFrom: ChangeFeedStartFrom

Where to start the changefeed from.

changeFeedMode: ChangeFeedMode

Defines the mode on which to consume the change feed.

changeFeedRequestOptions: ChangeFeedRequestOptions

(Optional) The options for the Change Feed consumption.

Returns

FeedIterator<T>

An iterator to go through the Change Feed.

Examples

ChangeFeedRequestOptions options = new ChangeFeedRequestOptions()
{
    PageSizeHint = 10,
}

FeedIterator<MyItem> feedIterator = this.Container.GetChangeFeedIterator<MyItem>(
    ChangeFeedStartFrom.Beginning(),
    ChangeFeedMode.Incremental,
    options);

    while (feedIterator.HasMoreResults)
    {
        FeedResponse<MyItem> response = await feedIterator.ReadNextAsync();

        if (response.StatusCode == NotModified) 
        {
            // No new changes
            // Capture response.ContinuationToken and break or sleep for some time
        }
        else 
        {
            foreach (var item in response)
            {
                Console.WriteLine(item);
            }
        }
    }

Applies to

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