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/*
 * 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.netty4;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import io.netty.handler.codec.http.FullHttpRequest;
import org.elasticsearch.ExceptionsHelper;

import java.util.List;

@ChannelHandler.Sharable
class Netty4HttpRequestCreator extends MessageToMessageDecoder {

    @Override
    protected void decode(ChannelHandlerContext ctx, FullHttpRequest msg, List out) {
        if (msg.decoderResult().isFailure()) {
            final Throwable cause = msg.decoderResult().cause();
            final Exception nonError;
            if (cause instanceof Error) {
                ExceptionsHelper.maybeDieOnAnotherThread(cause);
                nonError = new Exception(cause);
            } else {
                nonError = (Exception) cause;
            }
            out.add(new Netty4HttpRequest(msg.retain(), nonError));
        } else {
            out.add(new Netty4HttpRequest(msg.retain()));
        }
    }
}