static void AddBefore0(FABHandlerContext ctx, FABHandlerContext newCtx)
{
newCtx.Prev = ctx.Prev;
newCtx.Next = ctx;
ctx.Prev.Next = newCtx;
ctx.Prev = newCtx;
}
static void AddAfter0(FABHandlerContext ctx, FABHandlerContext newCtx)
{
newCtx.Prev = ctx;
newCtx.Next = ctx.Next;
ctx.Next.Prev = newCtx;
ctx.Next = newCtx;
}
public IFABChannelPipeline AddAfter(IEventExecutorGroup group, string baseName, string name, IFABChannelHandler handler)
{
Contract.Requires(handler != null);
FABHandlerContext newCtx;
lock (this)
{
CheckMultiplicity(handler);
FABHandlerContext ctx = this.GetContextOrThrow(baseName);
newCtx = this.NewContext(group, this.FilterName(name, handler), handler);
IEventExecutor executor = this.ExecutorSafe(newCtx.executor);
AddAfter0(ctx, newCtx);
// If the executor is null it means that the channel was not registered on an eventloop yet.
// In this case we remove the context from the pipeline and add a task that will call
// ChannelHandler.handlerRemoved(...) once the channel is registered.
if (executor == null)
{
this.CallHandlerCallbackLater(newCtx, true);
return(this);
}
if (!executor.InEventLoop)
{
executor.Execute(CallHandlerAddedAction, this, newCtx);
return(this);
}
}
this.CallHandlerAdded0(newCtx);
return(this);
}
public sealed override string ToString()
{
StringBuilder buf = new StringBuilder()
.Append(this.GetType().Name)
.Append('{');
FABHandlerContext ctx = this.head.Next;
while (true)
{
if (ctx == this.tail)
{
break;
}
buf.Append('(')
.Append(ctx.Name)
.Append(" = ")
.Append(ctx.Handler.GetType().Name)
.Append(')');
ctx = ctx.Next;
if (ctx == this.tail)
{
break;
}
buf.Append(", ");
}
buf.Append('}');
return(buf.ToString());
}
FABHandlerContext Remove(FABHandlerContext ctx)
{
Contract.Assert(ctx != this.head && ctx != this.tail);
lock (this)
{
IEventExecutor executor = this.ExecutorSafe(ctx.executor);
Remove0(ctx);
// If the executor is null it means that the channel was not registered on an eventloop yet.
// In this case we remove the context from the pipeline and add a task that will call
// ChannelHandler.handlerRemoved(...) once the channel is registered.
if (executor == null)
{
this.CallHandlerCallbackLater(ctx, false);
return(ctx);
}
if (!executor.InEventLoop)
{
executor.Execute((s, c) => ((FABChannelPipeline)s).CallHandlerRemoved0((FABHandlerContext)c), this, ctx);
return(ctx);
}
}
this.CallHandlerRemoved0(ctx);
return(ctx);
}
void DestroyDown(XThread currentThread, FABHandlerContext ctx, bool inEventLoop)
{
// We have reached at tail; now traverse backwards.
FABHandlerContext headContext = this.head;
while (true)
{
if (ctx == headContext)
{
break;
}
IEventExecutor executor = ctx.Executor;
if (inEventLoop || executor.IsInEventLoop(currentThread))
{
lock (this)
{
Remove0(ctx);
this.CallHandlerRemoved0(ctx);
}
}
else
{
executor.Execute((self, c) => ((FABChannelPipeline)self).DestroyDown(XThread.CurrentThread, (FABHandlerContext)c, true), this, ctx);
break;
}
ctx = ctx.Prev;
inEventLoop = false;
}
}
protected override Task WriteAsync(FABHandlerContext ctx, object msg)
{
Task result = base.WriteAsync(ctx, msg);
ctx.InvokeFlush();
return(result);
}
public static WriteTask NewInstance(FABHandlerContext ctx, object msg, TaskCompletionSource promise)
{
WriteTask task = Recycler.Take();
Init(task, ctx, msg, promise);
return(task);
}
protected static void Init(AbstractWriteTask task, FABHandlerContext ctx, object msg, TaskCompletionSource promise)
{
task.ctx = ctx;
task.msg = msg;
task.promise = promise;
if (EstimateTaskSizeOnSubmit)
{
FABChannelOutboundBuffer buffer = ctx.Channel.Unsafe.OutboundBuffer;
// Check for null as it may be set to null if the channel is closed already
if (buffer != null)
{
task.size = ctx.pipeline.EstimatorHandle.Size(msg) + WriteTaskOverhead;
buffer.IncrementPendingOutboundBytes(task.size);
}
else
{
task.size = 0;
}
}
else
{
task.size = 0;
}
}
IFABChannelHandler Replace(FABHandlerContext ctx, string newName, IFABChannelHandler newHandler)
{
Contract.Requires(newHandler != null);
Contract.Assert(ctx != this.head && ctx != this.tail);
FABHandlerContext newCtx;
lock (this)
{
CheckMultiplicity(newHandler);
if (newName == null)
{
newName = this.GenerateName(newHandler);
}
else
{
bool sameName = ctx.Name.Equals(newName, StringComparison.Ordinal);
if (!sameName)
{
this.CheckDuplicateName(newName);
}
}
newCtx = this.NewContext(ctx.executor, newName, newHandler);
IEventExecutor executor = this.ExecutorSafe(ctx.executor);
Replace0(ctx, newCtx);
// If the executor is null it means that the channel was not registered on an event loop yet.
// In this case we replace the context in the pipeline
// and add a task that will signal handler it was added or removed
// once the channel is registered.
if (executor == null)
{
this.CallHandlerCallbackLater(newCtx, true);
this.CallHandlerCallbackLater(ctx, false);
return(ctx.Handler);
}
if (!executor.InEventLoop)
{
executor.Execute(() =>
{
// Indicate new handler was added first (i.e. before old handler removed)
// because "removed" will trigger ChannelRead() or Flush() on newHandler and
// those event handlers must be called after handler was signaled "added".
this.CallHandlerAdded0(newCtx);
this.CallHandlerRemoved0(ctx);
});
return(ctx.Handler);
}
}
// Indicate new handler was added first (i.e. before old handler removed)
// because "removed" will trigger ChannelRead() or Flush() on newHandler and
// those event handlers must be called after handler was signaled "added".
this.CallHandlerAdded0(newCtx);
this.CallHandlerRemoved0(ctx);
return(ctx.Handler);
}
public override void ChannelActive(IFABChannelHandlerContext context)
{
if (this.context == null)
{
this.context = (FABHandlerContext)context;
}
base.ChannelActive(context);
}
static void Remove0(FABHandlerContext context)
{
FABHandlerContext prev = context.Prev;
FABHandlerContext next = context.Next;
prev.Next = next;
next.Prev = prev;
}
public override void Flush(IFABChannelHandlerContext context)
{
context.Flush();
if (this.context == null)
{
this.context = (FABHandlerContext)context;
}
}
void AddLast0(FABHandlerContext newCtx)
{
FABHandlerContext prev = this.tail.Prev;
newCtx.Prev = prev;
newCtx.Next = this.tail;
prev.Next = newCtx;
this.tail.Prev = newCtx;
}
void AddFirst0(FABHandlerContext newCtx)
{
FABHandlerContext nextCtx = this.head.Next;
newCtx.Prev = this.head;
newCtx.Next = nextCtx;
this.head.Next = newCtx;
nextCtx.Prev = newCtx;
}
FABHandlerContext FindContextOutbound()
{
FABHandlerContext ctx = this;
do
{
ctx = ctx.Prev;
}while ((ctx.SkipPropagationFlags & SkipFlags.Outbound) == SkipFlags.Outbound);
return(ctx);
}
public Task DeregisterAsync()
{
// todo: check for cancellation
FABHandlerContext next = this.FindContextOutbound();
IEventExecutor nextExecutor = next.Executor;
return(nextExecutor.InEventLoop
? next.InvokeDeregisterAsync()
: SafeExecuteOutboundAsync(nextExecutor, () => next.InvokeDeregisterAsync()));
}
IEnumerator <IFABChannelHandler> IEnumerable <IFABChannelHandler> .GetEnumerator()
{
FABHandlerContext current = this.head;
while (current != null)
{
yield return(current.Handler);
current = current.Next;
}
}
public FABChannelPipeline(FABChannel channel)
{
Contract.Requires(channel != null);
this.channel = channel;
this.tail = new TailContext(this);
this.head = new HeadContext(this);
this.head.Next = this.tail;
this.tail.Prev = this.head;
}
internal static void InvokeChannelInactive(FABHandlerContext next)
{
IEventExecutor nextExecutor = next.Executor;
if (nextExecutor.InEventLoop)
{
next.InvokeChannelInactive();
}
else
{
nextExecutor.Execute(c => ((FABHandlerContext)c).InvokeChannelInactive(), next);
}
}
public Task ConnectAsync(EndPoint remoteAddress, EndPoint localAddress)
{
FABHandlerContext next = this.FindContextOutbound();
Contract.Requires(remoteAddress != null);
// todo: check for cancellation
IEventExecutor nextExecutor = next.Executor;
return(nextExecutor.InEventLoop
? next.InvokeConnectAsync(remoteAddress, localAddress)
: SafeExecuteOutboundAsync(nextExecutor, () => next.InvokeConnectAsync(remoteAddress, localAddress)));
}
FABHandlerContext Context0(string name)
{
FABHandlerContext context = this.head.Next;
while (context != this.tail)
{
if (context.Name.Equals(name, StringComparison.Ordinal))
{
return(context);
}
context = context.Next;
}
return(null);
}
internal static void InvokeUserEventTriggered(FABHandlerContext next, object evt)
{
Contract.Requires(evt != null);
IEventExecutor nextExecutor = next.Executor;
if (nextExecutor.InEventLoop)
{
next.InvokeUserEventTriggered(evt);
}
else
{
nextExecutor.Execute(InvokeUserEventTriggeredAction, next, evt);
}
}
internal static void InvokeChannelReadComplete(FABHandlerContext next)
{
IEventExecutor nextExecutor = next.Executor;
if (nextExecutor.InEventLoop)
{
next.InvokeChannelReadComplete();
}
else
{
// todo: consider caching task
nextExecutor.Execute(InvokeChannelReadCompleteAction, next);
}
}
internal static void InvokeChannelWritabilityChanged(FABHandlerContext next)
{
IEventExecutor nextExecutor = next.Executor;
if (nextExecutor.InEventLoop)
{
next.InvokeChannelWritabilityChanged();
}
else
{
// todo: consider caching task
nextExecutor.Execute(InvokeChannelWritabilityChangedAction, next);
}
}
public IFABChannelHandlerContext Flush()
{
FABHandlerContext next = this.FindContextOutbound();
IEventExecutor nextExecutor = next.Executor;
if (nextExecutor.InEventLoop)
{
next.InvokeFlush();
}
else
{
nextExecutor.Execute(InvokeFlushAction, next);
}
return(this);
}
public Task DisconnectAsync()
{
if (!this.Channel.Metadata.HasDisconnect)
{
return(this.CloseAsync());
}
// todo: check for cancellation
FABHandlerContext next = this.FindContextOutbound();
IEventExecutor nextExecutor = next.Executor;
return(nextExecutor.InEventLoop
? next.InvokeDisconnectAsync()
: SafeExecuteOutboundAsync(nextExecutor, () => next.InvokeDisconnectAsync()));
}
internal static void InvokeChannelRead(FABHandlerContext next, object msg)
{
Contract.Requires(msg != null);
object m = next.pipeline.Touch(msg, next);
IEventExecutor nextExecutor = next.Executor;
if (nextExecutor.InEventLoop)
{
next.InvokeChannelRead(m);
}
else
{
nextExecutor.Execute(InvokeChannelReadAction, next, msg);
}
}
public IFABChannelHandlerContext Read()
{
FABHandlerContext next = this.FindContextOutbound();
IEventExecutor nextExecutor = next.Executor;
if (nextExecutor.InEventLoop)
{
next.InvokeRead();
}
else
{
// todo: consider caching task
nextExecutor.Execute(InvokeReadAction, next);
}
return(this);
}
public Task BindAsync(EndPoint localAddress)
{
Contract.Requires(localAddress != null);
// todo: check for cancellation
//if (!validatePromise(ctx, promise, false)) {
// // promise cancelled
// return;
//}
FABHandlerContext next = this.FindContextOutbound();
IEventExecutor nextExecutor = next.Executor;
return(nextExecutor.InEventLoop
? next.InvokeBindAsync(localAddress)
: SafeExecuteOutboundAsync(nextExecutor, () => next.InvokeBindAsync(localAddress)));
}
