private DefaultChannelHandlerContext remove(
final DefaultChannelHandlerContext ctx, final boolean forward) {
assert ctx != head && ctx != tail;
DefaultChannelHandlerContext context;
Future<?> future;
synchronized (this) {
if (!ctx.channel().isRegistered() || ctx.executor().inEventLoop()) {
remove0(ctx, forward);
return ctx;
} else {
future =
ctx.executor()
.submit(
new Runnable() {
@Override
public void run() {
synchronized (DefaultChannelPipeline.this) {
remove0(ctx, forward);
}
}
});
context = ctx;
}
}
// Run the following 'waiting' code outside of the above synchronized block
// in order to avoid deadlock
waitForFuture(future);
return context;
}
@Override
public ChannelPipeline addAfter(
EventExecutorGroup group, String baseName, final String name, ChannelHandler handler) {
final DefaultChannelHandlerContext ctx;
final DefaultChannelHandlerContext newCtx;
synchronized (this) {
ctx = getContextOrDie(baseName);
checkDuplicateName(name);
newCtx = new DefaultChannelHandlerContext(this, group, name, handler);
if (!newCtx.channel().isRegistered() || newCtx.executor().inEventLoop()) {
addAfter0(name, ctx, newCtx);
return this;
}
}
// Run the following 'waiting' code outside of the above synchronized block
// in order to avoid deadlock
newCtx.executeOnEventLoop(
new Runnable() {
@Override
public void run() {
synchronized (DefaultChannelPipeline.this) {
checkDuplicateName(name);
addAfter0(name, ctx, newCtx);
}
}
});
return this;
}
private ChannelHandler replace(
final DefaultChannelHandlerContext ctx,
final String newName,
ChannelHandler newHandler,
final boolean forward) {
assert ctx != head && ctx != tail;
Future<?> future;
synchronized (this) {
boolean sameName = ctx.name().equals(newName);
if (!sameName) {
checkDuplicateName(newName);
}
final DefaultChannelHandlerContext newCtx =
new DefaultChannelHandlerContext(this, ctx.executor, newName, newHandler);
if (!newCtx.channel().isRegistered() || newCtx.executor().inEventLoop()) {
replace0(ctx, newName, newCtx, forward);
return ctx.handler();
} else {
future =
newCtx
.executor()
.submit(
new Runnable() {
@Override
public void run() {
synchronized (DefaultChannelPipeline.this) {
replace0(ctx, newName, newCtx, forward);
}
}
});
}
}
// Run the following 'waiting' code outside of the above synchronized block
// in order to avoid deadlock
waitForFuture(future);
return ctx.handler();
}