org.wso2.carbon.mss.internal.router.HttpDispatcher.java Source code

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Here is the source code for org.wso2.carbon.mss.internal.router.HttpDispatcher.java

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/*
 *  Copyright (c) WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 *  WSO2 Inc. 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.wso2.carbon.mss.internal.router;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpObject;
import io.netty.util.AttributeKey;

/**
 * HttpDispatcher that invokes the appropriate http-handler method. The handler and the arguments are read
 * from the {@code RequestRouter} context.
 */
public class HttpDispatcher extends SimpleChannelInboundHandler<HttpObject> {

    private HttpMethodInfoBuilder httpMethodInfoBuilder;

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws HandlerException {
        Object httpMethodInfoBuilderObj = ctx.pipeline().context(RequestRouter.class)
                .attr(AttributeKey.valueOf(RequestRouter.METHOD_INFO_BUILDER)).get();
        if (httpMethodInfoBuilderObj instanceof HttpMethodInfoBuilder) {
            httpMethodInfoBuilder = (HttpMethodInfoBuilder) httpMethodInfoBuilderObj;
            if (msg instanceof FullHttpRequest) {
                FullHttpRequest fullHttpRequest = (FullHttpRequest) msg;
                httpMethodInfoBuilder.httpRequest(fullHttpRequest).build().invoke();
            } else if (msg instanceof HttpContent) {
                httpMethodInfoBuilder.build().chunk((HttpContent) msg);
            }
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws HandlerException {
        if (httpMethodInfoBuilder != null) {
            httpMethodInfoBuilder.getHttpResourceModel().getExceptionHandler().handle(cause,
                    httpMethodInfoBuilder.getRequest(), httpMethodInfoBuilder.getResponder());
        }
    }
}