mirror of https://github.com/dapr/dotnet-sdk.git
66 lines
2.5 KiB
C#
66 lines
2.5 KiB
C#
// ------------------------------------------------------------------------
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// Copyright 2021 The Dapr Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// ------------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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using Dapr.Client;
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namespace Samples.Client
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{
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public class StateStoreTransactionsExample : Example
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{
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private static readonly string storeName = "statestore";
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public override string DisplayName => "Using the State Store with Transactions";
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public override async Task RunAsync(CancellationToken cancellationToken)
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{
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using var client = new DaprClientBuilder().Build();
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var value = new Widget() { Size = "small", Color = "yellow", };
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// State transactions operate on raw bytes
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var bytes = JsonSerializer.SerializeToUtf8Bytes(value);
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var requests = new List<StateTransactionRequest>()
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{
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new StateTransactionRequest("widget", bytes, StateOperationType.Upsert),
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new StateTransactionRequest("oldwidget", null, StateOperationType.Delete)
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};
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Console.WriteLine("Executing transaction - save state and delete state");
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await client.ExecuteStateTransactionAsync(storeName, requests, cancellationToken: cancellationToken);
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Console.WriteLine("Executed State Transaction!");
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var state = await client.GetStateAsync<Widget>(storeName, "widget", cancellationToken: cancellationToken);
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if (state == null)
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{
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Console.WriteLine("State not found in store");
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}
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else
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{
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Console.WriteLine($"Got State: {state.Size} {state.Color}");
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}
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}
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private class Widget
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{
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public string? Size { get; set; }
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public string? Color { get; set; }
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}
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}
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}
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