| /* |
| * 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.Core.Impl |
| { |
| using System; |
| using System.Collections.Generic; |
| using System.Reflection; |
| using System.Runtime.InteropServices; |
| using System.Text; |
| using Apache.Ignite.Core.Cache; |
| using Apache.Ignite.Core.Cache.Configuration; |
| using Apache.Ignite.Core.Cluster; |
| using Apache.Ignite.Core.Common; |
| using Apache.Ignite.Core.Impl.Binary; |
| using Apache.Ignite.Core.Impl.Cluster; |
| using Apache.Ignite.Core.Impl.Common; |
| using BinaryReader = Apache.Ignite.Core.Impl.Binary.BinaryReader; |
| |
| /// <summary> |
| /// Native utility methods. |
| /// </summary> |
| internal static class IgniteUtils |
| { |
| /** Thread-local random. */ |
| [ThreadStatic] |
| private static Random _rnd; |
| |
| /// <summary> |
| /// Gets thread local random. |
| /// </summary> |
| /// <value>Thread local random.</value> |
| public static Random ThreadLocalRandom |
| { |
| get { return _rnd ?? (_rnd = new Random()); } |
| } |
| |
| /// <summary> |
| /// Returns shuffled list copy. |
| /// </summary> |
| /// <returns>Shuffled list copy.</returns> |
| public static IList<T> Shuffle<T>(IList<T> list) |
| { |
| int cnt = list.Count; |
| |
| if (cnt > 1) { |
| List<T> res = new List<T>(list); |
| |
| Random rnd = ThreadLocalRandom; |
| |
| while (cnt > 1) |
| { |
| cnt--; |
| |
| int idx = rnd.Next(cnt + 1); |
| |
| T val = res[idx]; |
| res[idx] = res[cnt]; |
| res[cnt] = val; |
| } |
| |
| return res; |
| } |
| return list; |
| } |
| |
| /// <summary> |
| /// Create new instance of specified class. |
| /// </summary> |
| /// <param name="typeName">Class name</param> |
| /// <param name="props">Properties to set.</param> |
| /// <returns>New Instance.</returns> |
| public static T CreateInstance<T>(string typeName, IEnumerable<KeyValuePair<string, object>> props = null) |
| { |
| IgniteArgumentCheck.NotNullOrEmpty(typeName, "typeName"); |
| |
| var type = new TypeResolver().ResolveType(typeName); |
| |
| if (type == null) |
| throw new IgniteException("Failed to create class instance [className=" + typeName + ']'); |
| |
| var res = (T) Activator.CreateInstance(type); |
| |
| if (props != null) |
| SetProperties(res, props); |
| |
| return res; |
| } |
| |
| /// <summary> |
| /// Set properties on the object. |
| /// </summary> |
| /// <param name="target">Target object.</param> |
| /// <param name="props">Properties.</param> |
| private static void SetProperties(object target, IEnumerable<KeyValuePair<string, object>> props) |
| { |
| if (props == null) |
| return; |
| |
| IgniteArgumentCheck.NotNull(target, "target"); |
| |
| Type typ = target.GetType(); |
| |
| foreach (KeyValuePair<string, object> prop in props) |
| { |
| PropertyInfo prop0 = typ.GetProperty(prop.Key, |
| BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic); |
| |
| if (prop0 == null) |
| throw new IgniteException("Property is not found [type=" + typ.Name + |
| ", property=" + prop.Key + ']'); |
| |
| prop0.SetValue(target, prop.Value, null); |
| } |
| } |
| |
| /// <summary> |
| /// Convert unmanaged char array to string. |
| /// </summary> |
| /// <param name="chars">Char array.</param> |
| /// <param name="charsLen">Char array length.</param> |
| /// <returns></returns> |
| public static unsafe string Utf8UnmanagedToString(sbyte* chars, int charsLen) |
| { |
| IntPtr ptr = new IntPtr(chars); |
| |
| if (ptr == IntPtr.Zero) |
| return null; |
| |
| byte[] arr = new byte[charsLen]; |
| |
| Marshal.Copy(ptr, arr, 0, arr.Length); |
| |
| return Encoding.UTF8.GetString(arr); |
| } |
| |
| /// <summary> |
| /// Convert string to unmanaged byte array. |
| /// </summary> |
| /// <param name="str">String.</param> |
| /// <returns>Unmanaged byte array.</returns> |
| public static unsafe sbyte* StringToUtf8Unmanaged(string str) |
| { |
| var ptr = IntPtr.Zero; |
| |
| if (str != null) |
| { |
| byte[] strBytes = Encoding.UTF8.GetBytes(str); |
| |
| ptr = Marshal.AllocHGlobal(strBytes.Length + 1); |
| |
| Marshal.Copy(strBytes, 0, ptr, strBytes.Length); |
| |
| *((byte*)ptr.ToPointer() + strBytes.Length) = 0; // NULL-terminator. |
| } |
| |
| return (sbyte*)ptr.ToPointer(); |
| } |
| |
| /// <summary> |
| /// Reads node collection from stream. |
| /// </summary> |
| /// <param name="reader">Reader.</param> |
| /// <param name="pred">The predicate.</param> |
| /// <returns> Nodes list or null. </returns> |
| public static List<IClusterNode> ReadNodes(BinaryReader reader, Func<ClusterNodeImpl, bool> pred = null) |
| { |
| var cnt = reader.ReadInt(); |
| |
| if (cnt < 0) |
| return null; |
| |
| var res = new List<IClusterNode>(cnt); |
| |
| var ignite = reader.Marshaller.Ignite; |
| |
| if (pred == null) |
| { |
| for (var i = 0; i < cnt; i++) |
| res.Add(ignite.GetNode(reader.ReadGuid())); |
| } |
| else |
| { |
| for (var i = 0; i < cnt; i++) |
| { |
| var node = ignite.GetNode(reader.ReadGuid()); |
| |
| if (pred(node)) |
| res.Add(node); |
| } |
| } |
| |
| return res; |
| } |
| |
| /// <summary> |
| /// Encodes the peek modes into a single int value. |
| /// </summary> |
| public static int EncodePeekModes(CachePeekMode[] modes, out bool hasPlatformCache) |
| { |
| var res = 0; |
| hasPlatformCache = false; |
| |
| if (modes == null) |
| { |
| return res; |
| } |
| |
| foreach (var mode in modes) |
| { |
| res |= (int) mode; |
| } |
| |
| // Clear Platform bit: Java does not understand it. |
| const int platformCache = (int) CachePeekMode.Platform; |
| const int all = (int) CachePeekMode.All; |
| hasPlatformCache = (res & platformCache) == platformCache || (res & all) == all; |
| |
| return res & ~platformCache; |
| } |
| } |
| } |