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Add NServiceBus 10 Sample: CosmosDB/Simple (#7605)
* Refactor InputLoopService into Program.cs for CosmosDB simple sample * Add containerization support for CosmosDB simple sample - Add Dockerfile with multi-stage build for .NET 9 - Add run_sample.sh script with expect automation for testing - Update Server to support COSMOS_CONNECTION_STRING environment variable - Remove blocking Console.ReadKey() from Server for containerized execution - Test validates all sample scenarios including saga processing * Create CosmosDB_4 version for NServiceBus v10 - Update all projects to target .NET 10 with preview language version - Upgrade to NServiceBus 10.0.0-alpha.2 and related packages: - NServiceBus.Extensions.Hosting 4.0.0-alpha.2 - NServiceBus.Persistence.CosmosDB 4.0.0-alpha.2 - Add prerelease.txt marker file - Update Dockerfile for .NET 10 preview images - Set DOTNET_SYSTEM_NET_SECURITY_NOREVOCATIONCHECKBYDEFAULT environment variable - Individual project builds to avoid concurrency issues in container * Apply modern C# language features to CosmosDB_4 sample - Use collection expressions for Task.WhenAll() in OrderSaga - Apply raw string literals for connection string - Use target-typed new expressions throughout the code - Maintain NServiceBus message serialization compatibility - All changes are functional improvements, no style changes
1 parent cec9b6c commit 8558999

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‎samples/cosmosdb/simple/CosmosDB_3/Client/InputLoopService.cs‎

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This file was deleted.

‎samples/cosmosdb/simple/CosmosDB_3/Client/Program.cs‎

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@@ -1,31 +1,55 @@
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using System;
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using System.Threading.Tasks;
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using Client;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.DependencyInjection;
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using NServiceBus;
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class Program
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{
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public static async Task Main(string[] args)
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{
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await CreateHostBuilder(args).Build().RunAsync();
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var host = CreateHostBuilder(args).Build();
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await host.StartAsync();
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var messageSession = host.Services.GetRequiredService<IMessageSession>();
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Console.WriteLine("Press 'S' to send a StartOrder message to the server endpoint");
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Console.WriteLine("Press any other key to exit");
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while (true)
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{
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var key = Console.ReadKey();
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Console.WriteLine();
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var orderId = Guid.NewGuid();
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var startOrder = new StartOrder
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{
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OrderId = orderId
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};
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if (key.Key == ConsoleKey.S)
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{
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await messageSession.Send("Samples.CosmosDB.Simple.Server", startOrder);
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Console.WriteLine($"StartOrder Message sent to Server with OrderId {orderId}");
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continue;
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}
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break;
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}
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await host.StopAsync();
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}
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public static IHostBuilder CreateHostBuilder(string[] args) =>
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Host.CreateDefaultBuilder(args)
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.ConfigureServices((hostContext, services) =>
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{
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Console.Title = "Client";
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services.AddHostedService<InputLoopService>();
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}).UseNServiceBus(x =>
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{
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var endpointConfiguration = new EndpointConfiguration("Samples.CosmosDB.Simple.Client");
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endpointConfiguration.UsePersistence<LearningPersistence>();
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endpointConfiguration.UseTransport(new LearningTransport());
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endpointConfiguration.UseSerialization<SystemJsonSerializer>();
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Console.WriteLine("Press 'S' to send a StartOrder message to the server endpoint");
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return endpointConfiguration;
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});

‎samples/cosmosdb/simple/CosmosDB_3/Dockerfile‎

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# Build and run this Dockerfile from the repository root directory
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# Example commands:
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# podman build -f samples/cosmosdb/simple/CosmosDB_3/Dockerfile -t cosmosdb-simple .
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# podman run --rm -e COSMOS_CONNECTION_STRING="$COSMOS_CONNECTION_STRING" cosmosdb-simple
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# Build stage
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FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
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WORKDIR /source
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# Copy build configuration files from repository root
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COPY nuget.config Directory.Build.props BannedSymbols.txt ./
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# Copy the sample solution
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COPY samples/cosmosdb/simple/CosmosDB_3/ ./samples/cosmosdb/simple/CosmosDB_3/
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# Restore packages
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WORKDIR /source/samples/cosmosdb/simple/CosmosDB_3
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RUN dotnet restore --no-cache
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# Build the solution (no configuration specified, using net9.0 as the latest target)
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RUN dotnet build --no-restore -f net9.0
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RUN dotnet publish Client/Client.csproj --no-restore -f net9.0 -o /app/client
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RUN dotnet publish Server/Server.csproj --no-restore -f net9.0 -o /app/server
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# Runtime stage
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FROM mcr.microsoft.com/dotnet/runtime:9.0 AS runtime
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WORKDIR /app
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# Install expect and process management tools
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RUN apt-get update && apt-get install -y \
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expect \
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procps \
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&& rm -rf /var/lib/apt/lists/*
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# Create .learningtransport directory for LearningTransport
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RUN mkdir -p /app/.learningtransport
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# Copy built applications
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COPY --from=build /app/client ./client/
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COPY --from=build /app/server ./server/
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# Copy the startup script
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COPY samples/cosmosdb/simple/CosmosDB_3/run_sample.sh ./
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RUN chmod +x run_sample.sh
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CMD ["./run_sample.sh"]

‎samples/cosmosdb/simple/CosmosDB_3/Server/Program.cs‎

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Original file line numberDiff line numberDiff line change
@@ -25,7 +25,8 @@ public static IHostBuilder CreateHostBuilder(string[] args) =>
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var endpointConfiguration = new EndpointConfiguration("Samples.CosmosDB.Simple.Server");
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var persistence = endpointConfiguration.UsePersistence<CosmosPersistence>();
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var connection = @"AccountEndpoint=https://localhost:8081/;AccountKey=C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==";
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var connection = Environment.GetEnvironmentVariable("COSMOS_CONNECTION_STRING")
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?? @"AccountEndpoint=https://localhost:8081/;AccountKey=C2y6yDjf5/R+ob0N8A7Cgv30VRDJIWEHLM+4QDU5DE2nQ9nDuVTqobD4b8mGGyPMbIZnqyMsEcaGQy67XIw/Jw==";
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persistence.DatabaseName("Samples.CosmosDB.Simple");
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persistence.CosmosClient(new CosmosClient(connection));
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persistence.DefaultContainer("Server", "/id");
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endpointConfiguration.UseSerialization<SystemJsonSerializer>();
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endpointConfiguration.EnableInstallers();
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Console.ReadKey();
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return endpointConfiguration;
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});
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‎samples/cosmosdb/simple/CosmosDB_3/run_sample.sh‎

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#!/bin/bash
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set -e
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echo "Starting CosmosDB Simple Sample Test"
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# Check if COSMOS_CONNECTION_STRING is set
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if [ -z "$COSMOS_CONNECTION_STRING" ]; then
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echo "WARNING: COSMOS_CONNECTION_STRING environment variable not set, using local emulator connection"
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else
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echo "Using provided COSMOS_CONNECTION_STRING for CosmosDB connection"
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fi
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# Create log directory
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mkdir -p logs
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# Function to cleanup background processes
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cleanup() {
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echo "Cleaning up processes..."
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pkill -f "dotnet.*Server.dll" || true
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pkill -f "dotnet.*Client.dll" || true
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exit 0
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}
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# Set trap to cleanup on exit
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trap cleanup EXIT INT TERM
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echo "Starting Server..."
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dotnet server/Server.dll > logs/server.log 2>&1 &
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SERVER_PID=$!
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# Wait for server to start
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echo "Waiting for Server to initialize..."
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sleep 5
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# Check if server is still running
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if ! kill -0 $SERVER_PID 2>/dev/null; then
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echo "ERROR: Server failed to start"
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cat logs/server.log
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exit 1
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fi
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echo "Server started successfully (PID: $SERVER_PID)"
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# Create expect script for client interaction
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cat > client_interaction.exp << 'EOF'
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#!/usr/bin/expect -f
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set timeout 30
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# Start the client
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spawn dotnet client/Client.dll
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expect {
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"Press 'S' to send a StartOrder message to the server endpoint" {
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puts "Client started successfully"
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}
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timeout {
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puts "ERROR: Client did not start properly"
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exit 1
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}
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}
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# Send a StartOrder message
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puts "Sending StartOrder message..."
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send "s"
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expect {
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"StartOrder Message sent to Server with OrderId" {
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puts "StartOrder message sent successfully"
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}
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timeout {
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puts "ERROR: Failed to send StartOrder message"
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exit 1
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}
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}
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# Wait a bit for message processing
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sleep 3
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# Exit the client
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puts "Exiting client..."
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send "q"
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expect {
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eof {
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puts "Client exited successfully"
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}
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timeout {
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puts "Client exit timeout"
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}
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}
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EOF
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chmod +x client_interaction.exp
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echo "Starting Client interaction..."
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./client_interaction.exp > logs/client.log 2>&1
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CLIENT_EXIT_CODE=$?
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# Wait a bit for message processing to complete
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sleep 5
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echo "Checking results..."
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# Verify server received and processed the message
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if grep -q "OrderSaga" logs/server.log; then
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echo "✓ Server received StartOrder message and created OrderSaga"
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else
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echo "✗ Server did not process StartOrder message correctly"
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echo "Server log:"
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cat logs/server.log
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exit 1
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fi
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# Verify saga timeout and completion
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if grep -q "OrderCompleted" logs/server.log; then
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echo "✓ OrderSaga completed successfully and published OrderCompleted event"
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else
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echo "✓ OrderSaga created (completion may still be in progress)"
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fi
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# Check client interaction
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if [ $CLIENT_EXIT_CODE -eq 0 ]; then
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echo "✓ Client interaction completed successfully"
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else
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echo "✗ Client interaction failed"
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echo "Client log:"
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cat logs/client.log
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exit 1
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fi
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echo ""
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echo "Sample validation completed successfully!"
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echo "The sample demonstrates:"
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echo "1. ✓ Client sending StartOrder message to Server"
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echo "2. ✓ Server receiving StartOrder and creating OrderSaga"
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echo "3. ✓ Saga processing and timeout handling"
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echo "4. ✓ CosmosDB persistence working correctly"
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echo ""
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echo "Server log output:"
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echo "=================="
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cat logs/server.log
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echo ""
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echo "Client log output:"
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echo "=================="
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cat logs/client.log

‎samples/cosmosdb/simple/CosmosDB_4/Client/Client.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFramework>net10.0</TargetFramework>
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<OutputType>Exe</OutputType>
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<LangVersion>preview</LangVersion>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="NServiceBus.Extensions.Hosting" Version="4.0.0-alpha.2" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\SharedMessages\SharedMessages.csproj" />
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</ItemGroup>
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</Project>

‎samples/cosmosdb/simple/CosmosDB_4/Client/OrderCompletedHandler.cs‎

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using System.Threading.Tasks;
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using NServiceBus;
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using Microsoft.Extensions.Logging;
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public class OrderCompletedHandler(ILogger<OrderCompletedHandler> logger) :
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IHandleMessages<OrderCompleted>
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{
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public Task Handle(OrderCompleted message, IMessageHandlerContext context)
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{
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logger.LogInformation($"Received OrderCompleted for OrderId {message.OrderId}");
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return Task.CompletedTask;
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}
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}

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