private void replace0(
DefaultChannelHandlerContext ctx,
String newName,
DefaultChannelHandlerContext newCtx,
boolean forward) {
boolean sameName = ctx.name().equals(newName);
DefaultChannelHandlerContext prev = ctx.prev;
DefaultChannelHandlerContext next = ctx.next;
newCtx.prev = prev;
newCtx.next = next;
callBeforeRemove(ctx);
callBeforeAdd(newCtx);
prev.next = newCtx;
next.prev = newCtx;
if (!sameName) {
name2ctx.remove(ctx.name());
}
name2ctx.put(newName, newCtx);
ChannelPipelineException removeException = null;
ChannelPipelineException addException = null;
boolean removed = false;
try {
callAfterRemove(ctx, forward);
removed = true;
} catch (ChannelPipelineException e) {
removeException = e;
}
boolean added = false;
try {
callAfterAdd(newCtx);
added = true;
} catch (ChannelPipelineException e) {
addException = e;
}
if (!removed && !added) {
logger.warn(removeException.getMessage(), removeException);
logger.warn(addException.getMessage(), addException);
throw new ChannelPipelineException(
"Both "
+ ctx.handler().getClass().getName()
+ ".afterRemove() and "
+ newCtx.handler().getClass().getName()
+ ".afterAdd() failed; see logs.");
} else if (!removed) {
throw removeException;
} else if (!added) {
throw addException;
}
}
private void addLast0(final String name, DefaultChannelHandlerContext newCtx) {
DefaultChannelHandlerContext prev = tail.prev;
newCtx.prev = prev;
newCtx.next = tail;
callBeforeAdd(newCtx);
prev.next = newCtx;
tail.prev = newCtx;
name2ctx.put(name, newCtx);
callAfterAdd(newCtx);
}
private void addFirst0(String name, DefaultChannelHandlerContext newCtx) {
DefaultChannelHandlerContext nextCtx = head.next;
newCtx.prev = head;
newCtx.next = nextCtx;
callBeforeAdd(newCtx);
head.next = newCtx;
nextCtx.prev = newCtx;
name2ctx.put(name, newCtx);
callAfterAdd(newCtx);
}
public DefaultChannelPipeline(Channel channel) {
if (channel == null) {
throw new NullPointerException("channel");
}
this.channel = channel;
tail = new DefaultChannelHandlerContext(this, null, generateName(TAIL_HANDLER), TAIL_HANDLER);
HeadHandler headHandler;
switch (channel.metadata().bufferType()) {
case BYTE:
headHandler = new ByteHeadHandler();
break;
case MESSAGE:
headHandler = new MessageHeadHandler();
break;
default:
throw new Error("unknown buffer type: " + channel.metadata().bufferType());
}
head =
new DefaultChannelHandlerContext(this, null, generateName(headHandler), headHandler, true);
head.next = tail;
tail.prev = head;
unsafe = channel.unsafe();
}
private void addAfter0(
final String name, DefaultChannelHandlerContext ctx, DefaultChannelHandlerContext newCtx) {
checkDuplicateName(name);
newCtx.prev = ctx;
newCtx.next = ctx.next;
callBeforeAdd(newCtx);
ctx.next.prev = newCtx;
ctx.next = newCtx;
name2ctx.put(name, newCtx);
callAfterAdd(newCtx);
}
private void remove0(DefaultChannelHandlerContext ctx, boolean forward) {
callBeforeRemove(ctx);
DefaultChannelHandlerContext prev = ctx.prev;
DefaultChannelHandlerContext next = ctx.next;
prev.next = next;
next.prev = prev;
name2ctx.remove(ctx.name());
callAfterRemove(ctx, forward);
}
private void addBefore0(
final String name, DefaultChannelHandlerContext ctx, DefaultChannelHandlerContext newCtx) {
newCtx.prev = ctx.prev;
newCtx.next = ctx;
callBeforeAdd(newCtx);
ctx.prev.next = newCtx;
ctx.prev = newCtx;
name2ctx.put(name, newCtx);
callAfterAdd(newCtx);
}