| #region Copyright notice and license |
| |
| // Copyright 2015 gRPC authors. |
| // |
| // Licensed 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. |
| |
| #endregion |
| |
| using System; |
| using System.Collections.Concurrent; |
| using System.Collections.Generic; |
| using System.Runtime.InteropServices; |
| using Grpc.Core.Logging; |
| using Grpc.Core.Utils; |
| |
| namespace Grpc.Core.Internal |
| { |
| internal delegate void OpCompletionDelegate(bool success); |
| |
| internal delegate void BatchCompletionDelegate(bool success, BatchContextSafeHandle ctx); |
| |
| internal delegate void RequestCallCompletionDelegate(bool success, RequestCallContextSafeHandle ctx); |
| |
| internal class CompletionRegistry |
| { |
| static readonly ILogger Logger = GrpcEnvironment.Logger.ForType<CompletionRegistry>(); |
| |
| readonly GrpcEnvironment environment; |
| readonly ConcurrentDictionary<IntPtr, OpCompletionDelegate> dict = new ConcurrentDictionary<IntPtr, OpCompletionDelegate>(new IntPtrComparer()); |
| IntPtr lastRegisteredKey; // only for testing |
| |
| public CompletionRegistry(GrpcEnvironment environment) |
| { |
| this.environment = environment; |
| } |
| |
| public void Register(IntPtr key, OpCompletionDelegate callback) |
| { |
| environment.DebugStats.PendingBatchCompletions.Increment(); |
| GrpcPreconditions.CheckState(dict.TryAdd(key, callback)); |
| this.lastRegisteredKey = key; |
| } |
| |
| public void RegisterBatchCompletion(BatchContextSafeHandle ctx, BatchCompletionDelegate callback) |
| { |
| OpCompletionDelegate opCallback = ((success) => HandleBatchCompletion(success, ctx, callback)); |
| Register(ctx.Handle, opCallback); |
| } |
| |
| public void RegisterRequestCallCompletion(RequestCallContextSafeHandle ctx, RequestCallCompletionDelegate callback) |
| { |
| OpCompletionDelegate opCallback = ((success) => HandleRequestCallCompletion(success, ctx, callback)); |
| Register(ctx.Handle, opCallback); |
| } |
| |
| public OpCompletionDelegate Extract(IntPtr key) |
| { |
| OpCompletionDelegate value; |
| GrpcPreconditions.CheckState(dict.TryRemove(key, out value)); |
| environment.DebugStats.PendingBatchCompletions.Decrement(); |
| return value; |
| } |
| |
| /// <summary> |
| /// For testing purposes only. |
| /// </summary> |
| public IntPtr LastRegisteredKey |
| { |
| get { return this.lastRegisteredKey; } |
| } |
| |
| private static void HandleBatchCompletion(bool success, BatchContextSafeHandle ctx, BatchCompletionDelegate callback) |
| { |
| try |
| { |
| callback(success, ctx); |
| } |
| catch (Exception e) |
| { |
| Logger.Error(e, "Exception occured while invoking batch completion delegate."); |
| } |
| finally |
| { |
| if (ctx != null) |
| { |
| ctx.Dispose(); |
| } |
| } |
| } |
| |
| private static void HandleRequestCallCompletion(bool success, RequestCallContextSafeHandle ctx, RequestCallCompletionDelegate callback) |
| { |
| try |
| { |
| callback(success, ctx); |
| } |
| catch (Exception e) |
| { |
| Logger.Error(e, "Exception occured while invoking request call completion delegate."); |
| } |
| finally |
| { |
| if (ctx != null) |
| { |
| ctx.Dispose(); |
| } |
| } |
| } |
| |
| /// <summary> |
| /// IntPtr doesn't implement <c>IEquatable{IntPtr}</c> so we need to use custom comparer to avoid boxing. |
| /// </summary> |
| private class IntPtrComparer : IEqualityComparer<IntPtr> |
| { |
| public bool Equals(IntPtr x, IntPtr y) |
| { |
| return x == y; |
| } |
| |
| public int GetHashCode(IntPtr obj) |
| { |
| return obj.GetHashCode(); |
| } |
| } |
| } |
| } |