/*
* 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.
*/
package org.elasticsearch.http.netty;
import org.elasticsearch.common.netty.NettyUtils;
import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.buffer.CompositeChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.handler.codec.http.HttpResponseEncoder;
import java.util.List;
/**
* Wraps a netty {@link HttpResponseEncoder} and makes sure that if the resulting
* channel buffer is composite, it will use the correct gathering flag. See more
* at {@link NettyUtils#DEFAULT_GATHERING}.
*/
public class ESHttpResponseEncoder extends HttpResponseEncoder {
@Override
protected Object encode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
Object retVal = super.encode(ctx, channel, msg);
if (retVal instanceof CompositeChannelBuffer) {
CompositeChannelBuffer ccb = (CompositeChannelBuffer) retVal;
if (ccb.useGathering() != NettyUtils.DEFAULT_GATHERING) {
List<ChannelBuffer> decompose = ccb.decompose(ccb.readerIndex(), ccb.readableBytes());
return ChannelBuffers.wrappedBuffer(NettyUtils.DEFAULT_GATHERING,
decompose.toArray(new ChannelBuffer[decompose.size()]));
}
}
return retVal;
}
}