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package org.elasticsearch.http.netty.pipelining;
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.
*/
// this file is from netty-http-pipelining, under apache 2.0 license
// see github.com/typesafehub/netty-http-pipelining
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelEvent;
import org.jboss.netty.channel.ChannelFuture;
import org.jboss.netty.channel.Channels;
import org.jboss.netty.channel.DownstreamMessageEvent;
/**
* Permits downstream channel events to be ordered and signalled as to whether more are to come for a given sequence.
*
* @author Christopher Hunt
*/
public class OrderedDownstreamChannelEvent implements ChannelEvent {
final ChannelEvent ce;
final OrderedUpstreamMessageEvent oue;
final int subsequence;
final boolean last;
/**
* Construct a downstream channel event for all types of events.
*
* @param oue the OrderedUpstreamMessageEvent that this response is associated with
* @param subsequence the sequence within the sequence
* @param last when set to true this indicates that there are no more responses to be received for the
* original OrderedUpstreamMessageEvent
*/
public OrderedDownstreamChannelEvent(final OrderedUpstreamMessageEvent oue, final int subsequence, boolean last,
final ChannelEvent ce) {
this.oue = oue;
this.ce = ce;
this.subsequence = subsequence;
this.last = last;
}
/**
* Convenience constructor signifying that this downstream message event is the last one for the given sequence,
* and that there is only one response.
*/
public OrderedDownstreamChannelEvent(final OrderedUpstreamMessageEvent oe,
final Object message) {
this(oe, 0, true, message);
}
/**
* Convenience constructor for passing message events.
*/
public OrderedDownstreamChannelEvent(final OrderedUpstreamMessageEvent oue, final int subsequence, boolean last,
final Object message) {
this(oue, subsequence, last, new DownstreamMessageEvent(oue.getChannel(), Channels.future(oue.getChannel()),
message, oue.getRemoteAddress()));
}
public OrderedUpstreamMessageEvent getOrderedUpstreamMessageEvent() {
return oue;
}
public int getSubsequence() {
return subsequence;
}
public boolean isLast() {
return last;
}
@Override
public Channel getChannel() {
return ce.getChannel();
}
@Override
public ChannelFuture getFuture() {
return ce.getFuture();
}
public ChannelEvent getChannelEvent() {
return ce;
}
}
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