Added service invocation examples

service_invocation/csharp/http/README.md

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+# Service Invocation
+
+In this quickstart, you'll create a checkout service and an order processor service to demonstrate how to use the service invocation API. The checkout service uses Dapr's http proxying capability to invoke a method on the order processing service.
+
+Visit [this](https://docs.dapr.io/developing-applications/building-blocks/service-invocation/) link for more information about Dapr and service invocation.
+
+This quickstart includes one checkout service:
+
+- Dotnet client service `checkout` 
+
+And one order processor service: 
+
+- Dotnet order-processor service `order-processor`
+
+### Run Dotnet checkout with Dapr
+
+1. Open a new terminal window and navigate to the `checkout` directory:
+
+```bash
+cd checkout
+```
+
+2. Install dependencies: 
+
+<!-- STEP
+name: Install Dotnet dependencies
+working_dir: ./checkout
+-->
+
+```bash
+dotnet restore
+dotnet build
+```
+
+3. Run the Dotnet checkout app with Dapr: 
+
+```bash
+dapr run --app-id checkout --app-protocol http --dapr-http-port 3500 -- dotnet run
+```
+
+<!-- END_STEP -->
+### Run Dotnet order-processor with Dapr
+
+1. Open a new terminal window and navigate to `order-processor` directory: 
+
+```bash
+cd order-processor
+```
+
+2. Install dependencies: 
+
+<!-- STEP
+name: Install Dotnet dependencies
+working_dir: ./order-processor
+-->
+
+```bash
+dotnet restore
+dotnet build
+```
+
+3. Run the Dotnet order-processor app with Dapr: 
+
+```bash
+dapr run --app-port 6001 --app-id order-processor --app-protocol http --dapr-http-port 3501 -- dotnet run
+```
+
+<!-- END_STEP -->

service_invocation/csharp/http/checkout.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.32112.339
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "checkout", "checkout\checkout.csproj", "{636C3192-12CE-4884-AC45-B7C8A276075A}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|Any CPU = Debug|Any CPU
+ Release|Any CPU = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {636C3192-12CE-4884-AC45-B7C8A276075A}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {636C3192-12CE-4884-AC45-B7C8A276075A}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {636C3192-12CE-4884-AC45-B7C8A276075A}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {636C3192-12CE-4884-AC45-B7C8A276075A}.Release|Any CPU.Build.0 = Release|Any CPU
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {49215BFE-48D9-44C4-A8F6-374E24D59DED}
+ EndGlobalSection
+EndGlobal

service_invocation/csharp/http/checkout/Program.cs

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+using System.Text;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+var baseURL = (Environment.GetEnvironmentVariable("BASE_URL") ?? "http://localhost") + ":" + (Environment.GetEnvironmentVariable("DAPR_HTTP_PORT") ?? "3500");
+
+var client = new HttpClient();
+client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
+// Adding app id as part of the header
+client.DefaultRequestHeaders.Add("dapr-app-id", "order-processor");
+
+for (int i = 1; i <= 10; i++) {
+ var order = new Order(i);
+ var orderJson = JsonSerializer.Serialize<Order>(order);
+ var content = new StringContent(orderJson, Encoding.UTF8, "application/json");
+
+ // Invoking a service
+ var response = await client.PostAsync($"{baseURL}/orders", content);
+ Console.WriteLine("Order passed: " + order);
+
+ await Task.Delay(TimeSpan.FromSeconds(1));
+}
+
+public record Order([property: JsonPropertyName("orderId")] int OrderId);

service_invocation/csharp/http/checkout/checkout.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+ <PropertyGroup>
+ <OutputType>Exe</OutputType>
+ <TargetFramework>net6.0</TargetFramework>
+ <Nullable>enable</Nullable>
+ <ImplicitUsings>enable</ImplicitUsings>
+ </PropertyGroup>
+
+</Project>

service_invocation/csharp/http/order-processor/Program.cs

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+using System.Text.Json.Serialization;
+
+var builder = WebApplication.CreateBuilder(args);
+
+var app = builder.Build();
+
+if (app.Environment.IsDevelopment()) {app.UseDeveloperExceptionPage();}
+
+app.MapPost("/orders", async context => {
+ var data = await context.Request.ReadFromJsonAsync<Order>();
+ Console.WriteLine("Order received : " + data);
+ await context.Response.WriteAsync(data.ToString());
+});
+
+await app.RunAsync();
+
+public record Order([property: JsonPropertyName("orderId")] int orderId); 

service_invocation/csharp/http/order-processor/Properties/launchSettings.json

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+{
+ "$schema": "http://json.schemastore.org/launchsettings.json",
+ "profiles": {
+ "CheckoutService": {
+ "commandName": "Project",
+ "dotnetRunMessages": "true",
+ "launchBrowser": true,
+ "launchUrl": "swagger",
+ "applicationUrl": "http://localhost:7001",
+ "environmentVariables": {
+ "ASPNETCORE_ENVIRONMENT": "Development"
+ }
+ }
+ }
+}

service_invocation/csharp/http/order-processor/appsettings.Development.json

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+{
+ "Logging": {
+ "LogLevel": {
+ "Default": "Information",
+ "Microsoft": "Warning",
+ "Microsoft.Hosting.Lifetime": "Information"
+ }
+ }
+}

service_invocation/csharp/http/order-processor/appsettings.json

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+{
+ "Logging": {
+ "LogLevel": {
+ "Default": "Information",
+ "Microsoft": "Warning",
+ "Microsoft.Hosting.Lifetime": "Information"
+ }
+ },
+ "AllowedHosts": "*"
+}

service_invocation/csharp/http/order-processor/order-processor.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+ <PropertyGroup>
+ <TargetFramework>net6.0</TargetFramework>
+ <Nullable>enable</Nullable>
+ <ImplicitUsings>enable</ImplicitUsings>
+ <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+ </PropertyGroup>
+
+ <ItemGroup>
+ <PackageReference Include="Swashbuckle.AspNetCore" Version="6.2.3" />
+ </ItemGroup>
+
+</Project>

service_invocation/go/http/README.md

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+# Service Invocation
+
+In this quickstart, you'll create a checkout service and an order processor service to demonstrate how to use the service invocation API. The checkout service uses Dapr's http proxying capability to invoke a method on the order processing service.
+
+Visit [this](https://docs.dapr.io/developing-applications/building-blocks/service-invocation/) link for more information about Dapr and service invocation.
+
+This quickstart includes one checkout service:
+
+- Go client service `checkout` 
+
+And one order processor service: 
+
+- Go order-processor service `order-processor`
+
+### Run Go checkout with Dapr
+
+1. Open a new terminal window and navigate to `checkout` directory: 
+
+```bash
+cd checkout
+```
+
+2. Install dependencies: 
+
+<!-- STEP
+name: Install Go dependencies
+working_dir: ./checkout
+-->
+
+```bash
+go build app.go
+```
+
+3. Run the Go checkout app with Dapr: 
+
+```bash
+dapr run --app-id checkout --app-protocol http --dapr-http-port 3500 -- go run app.go
+```
+
+<!-- END_STEP -->
+### Run Go order-processor with Dapr
+
+1. Open a new terminal window and navigate to `order-processor` directory: 
+
+```bash
+cd order-processor
+```
+
+2. Install dependencies: 
+
+<!-- STEP
+name: Install Go dependencies
+working_dir: ./order-processor
+-->
+
+```bash
+go build app.go
+```
+
+3. Run the Go order-processor app with Dapr: 
+
+```bash
+dapr run --app-port 6001 --app-id order-processor --app-protocol http --dapr-http-port 3501 -- go run app.go
+```
+
+<!-- END_STEP -->

service_invocation/go/http/checkout/app.go

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+package main
+
+import (
+ "fmt"
+ "io/ioutil"
+ "log"
+ "net/http"
+ "os"
+ "strconv"
+ "strings"
+)
+
+func main() {
+ var DAPR_HOST, DAPR_HTTP_PORT string
+ var okHost, okPort bool
+ if DAPR_HOST, okHost = os.LookupEnv("DAPR_HOST"); !okHost {
+ DAPR_HOST = "http://localhost"
+ }
+ if DAPR_HTTP_PORT, okPort = os.LookupEnv("DAPR_HTTP_PORT"); !okPort {
+ DAPR_HTTP_PORT = "3500"
+ }
+ for i := 1; i <= 10; i++ {
+ order := "{\"orderId\":" + strconv.Itoa(i) + "}"
+ client := &http.Client{}
+ req, err := http.NewRequest("POST", DAPR_HOST+":"+DAPR_HTTP_PORT+"/orders", strings.NewReader(order))
+ if err != nil {
+ fmt.Print(err.Error())
+ os.Exit(1)
+ }
+ // Adding app id as part of th header
+ req.Header.Add("dapr-app-id", "order-processor")
+
+ // Invoking a service
+ response, err := client.Do(req)
+
+ if err != nil {
+ fmt.Print(err.Error())
+ os.Exit(1)
+ }
+
+ result, err := ioutil.ReadAll(response.Body)
+ if err != nil {
+ log.Fatal(err)
+ }
+
+ log.Println("Order passed: ", string(result))
+ }
+}

service_invocation/go/http/checkout/go.mod

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+module dapr_example
+
+go 1.17
+
+require (
+ github.com/dapr/go-sdk v1.2.0 // indirect
+ github.com/golang/protobuf v1.4.3 // indirect
+ github.com/gorilla/mux v1.8.0 // indirect
+ github.com/pkg/errors v0.9.1 // indirect
+ golang.org/x/net v0.0.0-20201202161906-c7110b5ffcbb // indirect
+ golang.org/x/sys v0.0.0-20201202213521-69691e467435 // indirect
+ golang.org/x/text v0.3.4 // indirect
+ google.golang.org/genproto v0.0.0-20201204160425-06b3db808446 // indirect
+ google.golang.org/grpc v1.34.0 // indirect
+ google.golang.org/protobuf v1.25.0 // indirect
+)