/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.spdy;
import io.undertow.server.protocol.framed.FramePriority;
import io.undertow.server.protocol.framed.SendFrameHeader;
import java.util.Deque;
import java.util.Iterator;
import java.util.List;
/**
* TODO: real priority
*
* @author Stuart Douglas
*/
class SpdyFramePriority implements FramePriority<SpdyChannel, SpdyStreamSourceChannel,SpdyStreamSinkChannel>{
public static SpdyFramePriority INSTANCE = new SpdyFramePriority();
@Override
public boolean insertFrame(SpdyStreamSinkChannel newFrame, List<SpdyStreamSinkChannel> pendingFrames) {
//first deal with flow control
if(newFrame instanceof SpdyStreamStreamSinkChannel) {
SendFrameHeader header = ((SpdyStreamStreamSinkChannel) newFrame).generateSendFrameHeader();
//if no header is generated then flow control means we can't send anything
if(header.getByteBuffer() == null) {
return false;
}
}
pendingFrames.add(newFrame);
return true;
}
@Override
public void frameAdded(SpdyStreamSinkChannel addedFrame, List<SpdyStreamSinkChannel> pendingFrames, Deque<SpdyStreamSinkChannel> holdFrames) {
Iterator<SpdyStreamSinkChannel> it = pendingFrames.iterator();
while (it.hasNext()){
SpdyStreamSinkChannel pending = it.next();
if(pending instanceof SpdyStreamStreamSinkChannel) {
SendFrameHeader header = ((SpdyStreamStreamSinkChannel) pending).generateSendFrameHeader();
if(header.getByteBuffer() != null) {
pendingFrames.add(pending);
it.remove();
}
}
}
}
}