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‎src/WebApi/Dockerfile‎

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FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
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LABEL maintainer "Jonathan Peris"
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USER app
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WORKDIR /app
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FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
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RUN apt-get update \
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&& apt-get install -y --no-install-recommends \
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clang zlib1g-dev
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ARG AOT
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ARG TRIM
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ARG EXTRA_OPTIMIZE
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ARG BUILD_ARCHITECTURE
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ARG BUILD_CONFIGURATION
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WORKDIR /src
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COPY ["WebApi/WebApi.csproj", "WebApi/"]
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RUN dotnet restore -r $BUILD_ARCHITECTURE "./WebApi/WebApi.csproj" -p:Configuration=${BUILD_CONFIGURATION} -p:AOT=${AOT} -p:Trim=${TRIM}
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COPY . .
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WORKDIR "/src/WebApi"
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RUN dotnet build -r $BUILD_ARCHITECTURE "WebApi.csproj" -c $BUILD_CONFIGURATION -p:AOT=${AOT} -p:Trim=${TRIM} -p:ExtraOptimize=${EXTRA_OPTIMIZE} -o /app/build
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FROM build AS publish
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RUN dotnet publish -r $BUILD_ARCHITECTURE "WebApi.csproj" --no-restore -c $BUILD_CONFIGURATION -p:AOT=${AOT} -p:Trim=${TRIM} -p:ExtraOptimize=${EXTRA_OPTIMIZE} -o /app/publish
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FROM base AS final
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WORKDIR /app
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EXPOSE 8080
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COPY --from=publish /app/publish .
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ENTRYPOINT ["./WebApi"]

‎src/WebApi/Program.cs‎

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using Microsoft.AspNetCore.Mvc;
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using Npgsql;
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#if !EXTRAOPTIMIZE
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using OpenTelemetry.Metrics;
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using OpenTelemetry.ResourceDetectors.Container;
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using OpenTelemetry.ResourceDetectors.Host;
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using OpenTelemetry.Resources;
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using OpenTelemetry.Trace;
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#endif
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using System.Text.Json;
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using System.Text.Json.Serialization;
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var builder = WebApplication.CreateSlimBuilder(args);
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builder.Services.ConfigureHttpJsonOptions(options =>
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{
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options.SerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower;
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options.SerializerOptions.TypeInfoResolverChain.Insert(0, SourceGenerationContext.Default);
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});
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#if !EXTRAOPTIMIZE
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Action<ResourceBuilder> appResourceBuilder =
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resource => resource
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.AddDetector(new ContainerResourceDetector())
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.AddDetector(new HostDetector());
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builder.Services.AddOpenTelemetry()
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.ConfigureResource(appResourceBuilder)
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.WithTracing(tracerBuilder => tracerBuilder
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.AddAspNetCoreInstrumentation()
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.AddHttpClientInstrumentation())
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.WithMetrics(meterBuilder => meterBuilder
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.AddProcessInstrumentation()
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.AddRuntimeInstrumentation()
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.AddAspNetCoreInstrumentation()
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.AddPrometheusExporter());
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#endif
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builder.Services.AddNpgsqlDataSource(
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builder.Configuration.GetConnectionString("DefaultConnection")!
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);
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var app = builder.Build();
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#if !EXTRAOPTIMIZE
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app.MapPrometheusScrapingEndpoint();
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#endif
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var clientes = new Dictionary<int, int>
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{
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{ 1, 100000 },
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{ 2, 80000 },
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{ 3, 1000000 },
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{ 4, 10000000 },
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{ 5, 500000 }
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};
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#if !EXTRAOPTIMIZE
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app.MapHealthChecks("/healthz");
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#endif
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app.MapGet("/clientes/{id:int}/extrato", async (int id, [FromServices] NpgsqlDataSource dataSource) =>
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{
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if (!clientes.TryGetValue(id, out _))
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return Results.NotFound();
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await using (var cmd = dataSource.CreateCommand())
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{
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cmd.CommandText = "SELECT * FROM GetSaldoClienteById($1)";
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cmd.Parameters.AddWithValue(id);
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using var reader = await cmd.ExecuteReaderAsync();
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if (!await reader.ReadAsync())
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return Results.NotFound();
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var saldo = new SaldoDto(reader.GetInt32(0), reader.GetInt32(1), reader.GetDateTime(2));
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var jsonDoc = reader.GetFieldValue<JsonDocument>(3);
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var ultimasTransacoes = JsonSerializer.Deserialize<List<TransacaoDto>>(jsonDoc.RootElement, SourceGenerationContext.Default.ListTransacaoDto.Options);
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var extrato = new ExtratoDto(saldo, ultimasTransacoes);
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return Results.Ok(extrato);
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}
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});
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app.MapPost("/clientes/{id:int}/transacoes", async (int id, [FromBody] TransacaoDto transacao, [FromServices] NpgsqlDataSource dataSource) =>
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{
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if (!clientes.TryGetValue(id, out int limite))
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return Results.NotFound();
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if (!IsTransacaoValid(transacao))
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return Results.UnprocessableEntity();
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await using (var cmd = dataSource.CreateCommand())
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{
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cmd.CommandText = "SELECT InsertTransacao($1, $2, $3, $4)";
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cmd.Parameters.AddWithValue(id);
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cmd.Parameters.AddWithValue(transacao.Valor);
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cmd.Parameters.AddWithValue(transacao.Tipo);
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cmd.Parameters.AddWithValue(transacao.Descricao);
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using var reader = await cmd.ExecuteReaderAsync();
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if (!await reader.ReadAsync())
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return Results.UnprocessableEntity();
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var updatedSaldo = reader.GetInt32(0);
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return Results.Ok(new ClienteDto(id, limite, updatedSaldo));
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}
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});
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app.Run();
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static bool IsTransacaoValid(TransacaoDto transacao)
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{
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ReadOnlySpan<char> tipoC = "c";
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ReadOnlySpan<char> tipoD = "d";
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return (transacao.Tipo.AsSpan().SequenceEqual(tipoC) || transacao.Tipo.AsSpan().SequenceEqual(tipoD))
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&& !string.IsNullOrEmpty(transacao.Descricao)
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&& transacao.Descricao.Length <= 10
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&& transacao.Valor > 0;
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}
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[JsonSerializable(typeof(ClienteDto))]
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[JsonSerializable(typeof(ExtratoDto))]
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[JsonSerializable(typeof(SaldoDto))]
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[JsonSerializable(typeof(TransacaoDto))]
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[JsonSerializable(typeof(List<TransacaoDto>))]
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internal partial class SourceGenerationContext : JsonSerializerContext { }
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internal readonly record struct ClienteDto(int Id, int Limite, int Saldo);
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internal readonly record struct ExtratoDto(SaldoDto Saldo, List<TransacaoDto>? ultimas_transacoes);
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internal readonly record struct SaldoDto(int Total, int Limite, DateTime data_extrato);
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internal readonly record struct TransacaoDto(int Valor, string Tipo, string Descricao);

‎src/WebApi/Properties/launchSettings.json‎

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{
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"profiles": {
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"http": {
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"commandName": "Project",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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},
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"dotnetRunMessages": true,
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"applicationUrl": "http://localhost:9999"
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},
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"Docker": {
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"commandName": "Docker",
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"launchUrl": "{Scheme}://{ServiceHost}:{ServicePort}",
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"environmentVariables": {
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"ASPNETCORE_HTTP_PORTS": "8080"
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},
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"publishAllPorts": true
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}
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},
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"$schema": "http://json.schemastore.org/launchsettings.json"
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}

‎src/WebApi/WebApi.csproj‎

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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>net9.0</TargetFramework>
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<Nullable>enable</Nullable>
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<ImplicitUsings>enable</ImplicitUsings>
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<DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
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<DockerfileContext>..\..</DockerfileContext>
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<DockerComposeProjectPath>..\..\docker-compose.dcproj</DockerComposeProjectPath>
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</PropertyGroup>
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<PropertyGroup Condition="'$(AOT)' == 'true'">
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<PublishAot>true</PublishAot>
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<OptimizationPreference>Speed</OptimizationPreference>
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</PropertyGroup>
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<PropertyGroup Condition="'$(Trim)' == 'true'">
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<PublishReadyToRun>true</PublishReadyToRun>
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<PublishReadyToRunComposite>true</PublishReadyToRunComposite>
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<PublishSingleFile>true</PublishSingleFile>
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<SelfContained>true</SelfContained>
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</PropertyGroup>
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<PropertyGroup Condition="'$(ExtraOptimize)' == 'true'">
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<TrimmerRemoveSymbols>true</TrimmerRemoveSymbols>
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<DebuggerSupport>false</DebuggerSupport>
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<EnableUnsafeBinaryFormatterSerialization>false</EnableUnsafeBinaryFormatterSerialization>
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<EnableUnsafeUTF7Encoding>false</EnableUnsafeUTF7Encoding>
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<EventSourceSupport>false</EventSourceSupport>
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<HttpActivityPropagationSupport>false</HttpActivityPropagationSupport>
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<InvariantGlobalization>true</InvariantGlobalization>
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<MetadataUpdaterSupport>false</MetadataUpdaterSupport>
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<StackTraceSupport>false</StackTraceSupport>
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<UseSystemResourceKeys>true</UseSystemResourceKeys>
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<DefineConstants>$(DefineConstants);EXTRAOPTIMIZE</DefineConstants>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Npgsql" Version="9.0.3" />
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<PackageReference Include="Npgsql.DependencyInjection" Version="9.0.3" />
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</ItemGroup>
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<ItemGroup Condition="'$(ExtraOptimize)' == 'false'">
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<PackageReference Include="OpenTelemetry.Exporter.Prometheus.AspnetCore" Version="1.7.0-rc.1" />
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<PackageReference Include="OpenTelemetry.Extensions.Hosting" Version="1.7.0" />
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<PackageReference Include="OpenTelemetry.Instrumentation.AspNetCore" Version="1.7.1" />
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<PackageReference Include="OpenTelemetry.Instrumentation.Http" Version="1.7.1" />
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<PackageReference Include="OpenTelemetry.Instrumentation.Process" Version="0.5.0-beta.4" />
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<PackageReference Include="OpenTelemetry.Instrumentation.Runtime" Version="1.7.0" />
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<PackageReference Include="OpenTelemetry.ResourceDetectors.Container" Version="1.0.0-beta.6" />
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<PackageReference Include="OpenTelemetry.ResourceDetectors.Host" Version="0.1.0-alpha.2" />
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</ItemGroup>
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</Project>

‎src/WebApi/WebApi.http‎

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@HostAddress = http://localhost:9999
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POST {{HostAddress}}/clientes/1/transacoes
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Content-Type: application/json
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{
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"valor": 1000,
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"tipo" : "d",
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"descricao" : "1"
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}
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###
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GET {{HostAddress}}/clientes/1/extrato
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Accept: application/json
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###

‎src/WebApi/appsettings.json‎

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{
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"Logging": {
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"LogLevel": {
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"Default": "Information",
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"Microsoft.AspNetCore.HttpLogging.HttpLoggingMiddleware": "Warning",
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"Microsoft.AspNetCore": "Warning",
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"Microsoft.EntityFrameworkCore": "Warning"
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}
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},
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"AllowedHosts": "*"
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}

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