Merge pull request #42 from yyjdelete/issue_35

Only create VoidChannelPromise.Task when needed

src/DotNetty.Transport/Channels/VoidChannelPromise.cs

@@ -27,6 +27,7 @@ namespace DotNetty.Transport.Channels
  using System.Threading.Tasks;
  using DotNetty.Common.Utilities;
  using DotNetty.Common.Concurrency;
+ using System.Threading;
 
  public sealed class VoidChannelPromise : IPromise
  {
@@ -35,6 +36,7 @@ public sealed class VoidChannelPromise : IPromise
  private readonly IChannel _channel;
  // Will be null if we should not propagate exceptions through the pipeline on failure case.
  private readonly bool _fireException;
+ private readonly Lazy<Task> _task;
 
  static VoidChannelPromise()
  {
@@ -51,10 +53,10 @@ public VoidChannelPromise(IChannel channel, bool fireException)
  if (channel is null) { ThrowHelper.ThrowArgumentNullException(ExceptionArgument.channel); }
  _channel = channel;
  _fireException = fireException;
- Task = TaskUtil.FromException(Error);
+ _task = new Lazy<Task>(() => TaskUtil.FromException(Error), LazyThreadSafetyMode.ExecutionAndPublication);
  }
 
- public Task Task { get; }
+ public Task Task => _task.Value;
 
  public bool IsVoid => true;