modules/platforms/dotnet/examples/Apache.Ignite.Examples/Datagrid/TransactionExample.cs

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace Apache.Ignite.Examples.Datagrid
{
    using System;
    using Apache.Ignite.Core;
    using Apache.Ignite.Core.Cache.Configuration;
    using Apache.Ignite.Core.Transactions;
    using Apache.Ignite.ExamplesDll.Binary;

    /// <summary>
    /// This example demonstrates how to use transactions on Apache cache.
    /// <para />
    /// 1) Build the project Apache.Ignite.ExamplesDll (select it -> right-click -> Build).
    ///    Apache.Ignite.ExamplesDll.dll must appear in %IGNITE_HOME%/platforms/dotnet/examples/Apache.Ignite.ExamplesDll/bin/${Platform]/${Configuration} folder.
    /// 2) Set this class as startup object (Apache.Ignite.Examples project -> right-click -> Properties ->
    ///     Application -> Startup object);
    /// 3) Start example (F5 or Ctrl+F5).
    /// <para />
    /// This example can be run with standalone Apache Ignite.NET node:
    /// 1) Run %IGNITE_HOME%/platforms/dotnet/bin/Apache.Ignite.exe:
    /// Apache.Ignite.exe -configFileName=platforms\dotnet\examples\apache.ignite.examples\app.config -assembly=[path_to_Apache.Ignite.ExamplesDll.dll]
    /// 2) Start example.
    /// </summary>
    public class TransactionExample
    {
        /// <summary>Cache name.</summary>
        private const string CacheName = "dotnet_cache_tx";

        /// <summary>
        /// Runs the example.
        /// </summary>
        [STAThread]
        public static void Main()
        {
            using (var ignite = Ignition.StartFromApplicationConfiguration())
            {
                Console.WriteLine();
                Console.WriteLine(">>> Transaction example started.");

                var cache = ignite.GetOrCreateCache<int, Account>(new CacheConfiguration
                {
                    Name = CacheName,
                    AtomicityMode = CacheAtomicityMode.Transactional
                });

                // Clean up caches on all nodes before run.
                cache.Clear();

                // Initialize.
                cache.Put(1, new Account(1, 100));
                cache.Put(2, new Account(2, 200));

                Console.WriteLine();
                Console.WriteLine(">>> Accounts before transfer: ");
                Console.WriteLine(">>>     " + cache.Get(1));
                Console.WriteLine(">>>     " + cache.Get(2));
                Console.WriteLine();

                // Transfer money between accounts in a single transaction.
                using (var tx = cache.Ignite.GetTransactions().TxStart(TransactionConcurrency.Pessimistic,
                    TransactionIsolation.RepeatableRead))
                {
                    Account acc1 = cache.Get(1);
                    Account acc2 = cache.Get(2);

                    acc1.Balance += 100;
                    acc2.Balance -= 100;

                    cache.Put(1, acc1);
                    cache.Put(2, acc2);

                    tx.Commit();
                }

                Console.WriteLine(">>> Transfer finished.");

                Console.WriteLine();
                Console.WriteLine(">>> Accounts after transfer: ");
                Console.WriteLine(">>>     " + cache.Get(1));
                Console.WriteLine(">>>     " + cache.Get(2));
                Console.WriteLine();
            }

            Console.WriteLine();
            Console.WriteLine(">>> Example finished, press any key to exit ...");
            Console.ReadKey();
        }
    }
}