CSharp Tutorial


Introduction

All Apache Thrift tutorials require that you have:

  1. Built and installed the Apache Thrift Compiler and Libraries, see Building from source for more details.
  2. Generated the tutorial.thrift and shared.thrift files as discussed here.

    thrift -r --gen csharp tutorial.thrift
    
  3. Followed all prerequisites listed below.

Prerequisites

Client

using System;
using Thrift;
using Thrift.Protocol;
using Thrift.Server;
using Thrift.Transport;

namespace CSharpTutorial
{
    public class CSharpClient
    {
        public static void Main()
        {
            try
            {
                TTransport transport = new TSocket("localhost", 9090);
                TProtocol protocol = new TBinaryProtocol(transport);
                Calculator.Client client = new Calculator.Client(protocol);

                transport.Open();
                try
                {
                    client.ping();
                    Console.WriteLine("ping()");

                    int sum = client.add(1, 1);
                    Console.WriteLine("1+1={0}", sum);

                    Work work = new Work();

                    work.Op = Operation.DIVIDE;
                    work.Num1 = 1;
                    work.Num2 = 0;
                    try
                    {
                        int quotient = client.calculate(1, work);
                        Console.WriteLine("Whoa we can divide by 0");
                    }
                    catch (InvalidOperation io)
                    {
                        Console.WriteLine("Invalid operation: " + io.Why);
                    }

                    work.Op = Operation.SUBTRACT;
                    work.Num1 = 15;
                    work.Num2 = 10;
                    try
                    {
                        int diff = client.calculate(1, work);
                        Console.WriteLine("15-10={0}", diff);
                    }
                    catch (InvalidOperation io)
                    {
                        Console.WriteLine("Invalid operation: " + io.Why);
                    }

                    SharedStruct log = client.getStruct(1);
                    Console.WriteLine("Check log: {0}", log.Value);

                }
                finally
                {
                    transport.Close();
                }
            }
            catch (TApplicationException x)
            {
                Console.WriteLine(x.StackTrace);
            }

        }
    }
}

Server

using System;
using System.Collections.Generic;
using Thrift.Server;
using Thrift.Transport;

namespace CSharpTutorial
{
    public class CalculatorHandler : Calculator.Iface
    {
        Dictionary<int, SharedStruct> log;

        public CalculatorHandler()
        {
            log = new Dictionary<int, SharedStruct>();
        }

        public void ping()
        {
            Console.WriteLine("ping()");
        }

        public int add(int n1, int n2)
        {
            Console.WriteLine("add({0},{1})", n1, n2);
            return n1 + n2;
        }

        public int calculate(int logid, Work work)
        {
            Console.WriteLine("calculate({0}, [{1},{2},{3}])", logid, work.Op, work.Num1, work.Num2);
            int val = 0;
            switch (work.Op)
            {
                case Operation.ADD:
                    val = work.Num1 + work.Num2;
                    break;

                case Operation.SUBTRACT:
                    val = work.Num1 - work.Num2;
                    break;

                case Operation.MULTIPLY:
                    val = work.Num1 * work.Num2;
                    break;

                case Operation.DIVIDE:
                    if (work.Num2 == 0)
                    {
                        InvalidOperation io = new InvalidOperation();
                        io.WhatOp = (int)work.Op;
                        io.Why = "Cannot divide by 0";
                        throw io;
                    }
                    val = work.Num1 / work.Num2;
                    break;

                default:
                    {
                        InvalidOperation io = new InvalidOperation();
                        io.WhatOp = (int)work.Op;
                        io.Why = "Unknown operation";
                        throw io;
                    }
            }

            SharedStruct entry = new SharedStruct();
            entry.Key = logid;
            entry.Value = val.ToString();
            log[logid] = entry;

            return val;
        }

        public SharedStruct getStruct(int key)
        {
            Console.WriteLine("getStruct({0})", key);
            return log[key];
        }

        public void zip()
        {
            Console.WriteLine("zip()");
        }
    }

    public class CSharpServer
    {
        public static void Main()
        {
            try
            {
                CalculatorHandler handler = new CalculatorHandler();
                Calculator.Processor processor = new Calculator.Processor(handler);
                TServerTransport serverTransport = new TServerSocket(9090);
                TServer server = new TSimpleServer(processor, serverTransport);

                // Use this for a multithreaded server
                // server = new TThreadPoolServer(processor, serverTransport);

                Console.WriteLine("Starting the server...");
                server.Serve();
            }
            catch (Exception x)
            {
                Console.WriteLine(x.StackTrace);
            }
            Console.WriteLine("done.");
        }
    }
}

Additional Information