/*
* 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.protocols.ajp;
import java.util.Deque;
import java.util.Iterator;
import java.util.List;
import io.undertow.server.protocol.framed.FramePriority;
import io.undertow.server.protocol.framed.SendFrameHeader;
/**
* AJP frame priority
* @author Stuart Douglas
*/
class AjpClientFramePriority implements FramePriority<AjpClientChannel, AbstractAjpClientStreamSourceChannel, AbstractAjpClientStreamSinkChannel>{
public static AjpClientFramePriority INSTANCE = new AjpClientFramePriority();
@Override
public boolean insertFrame(AbstractAjpClientStreamSinkChannel newFrame, List<AbstractAjpClientStreamSinkChannel> pendingFrames) {
if(newFrame instanceof AjpClientRequestClientStreamSinkChannel) {
SendFrameHeader header = ((AjpClientRequestClientStreamSinkChannel) newFrame).generateSendFrameHeader();
if(header.getByteBuffer() == null) {
//we clear the header, as we want to generate a new real header when the flow control window is updated
((AjpClientRequestClientStreamSinkChannel) newFrame).clearHeader();
return false;
}
}
pendingFrames.add(newFrame);
return true;
}
@Override
public void frameAdded(AbstractAjpClientStreamSinkChannel addedFrame, List<AbstractAjpClientStreamSinkChannel> pendingFrames, Deque<AbstractAjpClientStreamSinkChannel> holdFrames) {
Iterator<AbstractAjpClientStreamSinkChannel> it = holdFrames.iterator();
while (it.hasNext()){
AbstractAjpClientStreamSinkChannel pending = it.next();
if(pending instanceof AjpClientRequestClientStreamSinkChannel) {
SendFrameHeader header = ((AjpClientRequestClientStreamSinkChannel) pending).generateSendFrameHeader();
if(header.getByteBuffer() != null) {
pendingFrames.add(pending);
it.remove();
} else {
//we clear the header, as we want to generate a new real header when the flow control window is updated
((AjpClientRequestClientStreamSinkChannel) pending).clearHeader();
}
}
}
}
}