| <Query Kind="Program"> |
| <NuGetReference>Apache.Ignite</NuGetReference> |
| <Namespace>Apache.Ignite.Core</Namespace> |
| <Namespace>Apache.Ignite.Core.Binary</Namespace> |
| <Namespace>Apache.Ignite.Core.Cache.Configuration</Namespace> |
| <Namespace>Apache.Ignite.Core.Cache.Query</Namespace> |
| <Namespace>Apache.Ignite.Core.Compute</Namespace> |
| <Namespace>Apache.Ignite.Core.Deployment</Namespace> |
| </Query> |
| |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// Example demonstrating closure execution. |
| /// |
| /// Requirements: |
| /// * Java Runtime Environment (JRE): http://www.oracle.com/technetwork/java/javase/downloads/index.html (x86 for regular LINQPad, x64 for AnyCPU LINQPad) |
| /// </summary> |
| |
| void Main() |
| { |
| // Force new LINQPad query process to reinit JVM |
| Util.NewProcess = true; |
| |
| // Enable peer assembly loading. |
| // This example can be run with standalone nodes started with Apache.Ignite.exe. |
| // To download and start a standalone node from NuGet: |
| // 1) > nuget install Apache.Ignite |
| // 2) > cd Apache.Ignite*\lib\net40 |
| // 3) Enable peer assembly loading in Apache.Ignite.exe.config: |
| // <igniteConfiguration peerAssemblyLoadingMode='CurrentAppDomain'> |
| // 4) Run Apache.Ignite.exe (one or more times) |
| // 5) Start this example, check output in the standalone node`s console |
| var cfg = new IgniteConfiguration |
| { |
| PeerAssemblyLoadingMode = PeerAssemblyLoadingMode.CurrentAppDomain |
| }; |
| |
| // Start instance |
| using (var ignite = Ignition.Start(cfg)) |
| { |
| // Split the string by spaces to count letters in each word in parallel. |
| var words = "Count characters using closure".Split(); |
| |
| var res = ignite.GetCompute().Apply(new CharacterCountClosure(), words); |
| |
| int totalLen = res.Sum(); // reduce manually |
| |
| totalLen.Dump("Total character count with manual reduce"); |
| |
| totalLen = ignite.GetCompute().Apply(new CharacterCountClosure(), words, new CharacterCountReducer()); |
| |
| totalLen.Dump("Total character count with reducer"); |
| } |
| } |
| |
| /// <summary> |
| /// Closure counting characters in a string. |
| /// </summary> |
| public class CharacterCountClosure : IComputeFunc<string, int> |
| { |
| /// <summary> |
| /// Calculate character count of the given word. |
| /// </summary> |
| /// <param name="arg">Word.</param> |
| /// <returns>Character count.</returns> |
| public int Invoke(string arg) |
| { |
| int len = arg.Length; |
| |
| Console.WriteLine("Character count in word \"" + arg + "\": " + len); |
| |
| return len; |
| } |
| } |
| |
| /// <summary> |
| /// Character count reducer which collects individual string lengths and aggregate them. |
| /// </summary> |
| public class CharacterCountReducer : IComputeReducer<int, int> |
| { |
| /// <summary> Total length. </summary> |
| private int _length; |
| |
| /// <summary> |
| /// Collect character counts of distinct words. |
| /// </summary> |
| /// <param name="res">Character count of a distinct word.</param> |
| /// <returns><c>True</c> to continue collecting results until all closures are finished.</returns> |
| public bool Collect(int res) |
| { |
| _length += res; |
| |
| return true; |
| } |
| |
| /// <summary> |
| /// Reduce all collected results. |
| /// </summary> |
| /// <returns>Total character count.</returns> |
| public int Reduce() |
| { |
| return _length; |
| } |
| } |