public abstract class AbstractNioByteChannel extends AbstractNioChannel
{
protected class NioByteUnsafe extends AbstractNIoUnsafe {
@Override
public final void read() {
final ChannelPipeline pipeline = pipeline();
……
// 读取结果.
byteBuf = allocHandle.allocate(allocator);
……
int localReadamount = doReadBytes(byteBuf);
………// dispatch结果到Handlerpipeline.fireChannelRead(byteBuf);
……
}
public class ChannelInboundHandlerAdapter extends ChannelHandlerAdapter implements ChannelInboundHandler
{
//默认的通道激活操作
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
ctx.fireChannelActive();
}
//默认的通道读操作
@Override
public void channelRead(ChannelHandlerContext ctx,Object msg) throws Exception {
ctx.fireChannelRead(msg);
}
}
abstract class AbstractChannelHandlerContext extends DefaultAttributeMap implements ChannelHandlerContext
{
volatile AbstractChannelHandlerContext next;
volatile AbstractChannelHandlerContext prev;
@Override
public ChannelHandlerContext fireChannelRead(final Object msg) {
invokeChannelRead(findContextInbound(),msg);
return this;
}
static void invokeChannelRead(final AbstractChannelHandlerContext next,final Object msg) {
……
next.invokeChannelRead(msg);
……
}
private void invokeChannelRead(Object msg) {
……
((ChannelInboundHandler) handler()).channelRead(this,msg);
……
}
private AbstractChannelHandlerContext findContextInbound() {
AbstractChannelHandlerContext ctx = this;
do {
ctx = ctx.next;
} while (!ctx.inbound);
return ctx;
}
}
private AbstractChannelHandlerContext findContextoutbound() { AbstractChannelHandlerContext ctx = this; do { ctx = ctx.prev; } while (!ctx.outbound); return ctx;}
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