dubbo TripleHttp2ClientResponseHandler 源码

dubbo TripleHttp2ClientResponseHandler 代码

文件路径：/dubbo-rpc/dubbo-rpc-triple/src/main/java/org/apache/dubbo/rpc/protocol/tri/transport/TripleHttp2ClientResponseHandler.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.apache.dubbo.rpc.protocol.tri.transport;

import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.rpc.TriRpcStatus;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http2.Http2DataFrame;
import io.netty.handler.codec.http2.Http2Error;
import io.netty.handler.codec.http2.Http2GoAwayFrame;
import io.netty.handler.codec.http2.Http2HeadersFrame;
import io.netty.handler.codec.http2.Http2ResetFrame;
import io.netty.handler.codec.http2.Http2StreamFrame;

public final class TripleHttp2ClientResponseHandler extends
    SimpleChannelInboundHandler<Http2StreamFrame> {

    private static final Logger LOGGER = LoggerFactory.getLogger(
        TripleHttp2ClientResponseHandler.class);
    private final H2TransportListener transportListener;

    public TripleHttp2ClientResponseHandler(H2TransportListener listener) {
        super(false);
        this.transportListener = listener;
    }

    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
        super.userEventTriggered(ctx, evt);
        if (evt instanceof Http2GoAwayFrame) {
            Http2GoAwayFrame event = (Http2GoAwayFrame) evt;
            ctx.close();
            LOGGER.debug(
                "Event triggered, event name is: " + event.name() + ", last stream id is: "
                    + event.lastStreamId());
        } else if (evt instanceof Http2ResetFrame) {
            onResetRead(ctx, (Http2ResetFrame) evt);
        }
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, Http2StreamFrame msg) throws Exception {
        if (msg instanceof Http2HeadersFrame) {
            final Http2HeadersFrame headers = (Http2HeadersFrame) msg;
            transportListener.onHeader(headers.headers(), headers.isEndStream());
        } else if (msg instanceof Http2DataFrame) {
            final Http2DataFrame data = (Http2DataFrame) msg;
            transportListener.onData(data.content(), data.isEndStream());
        } else {
            super.channelRead(ctx, msg);
        }
    }

    private void onResetRead(ChannelHandlerContext ctx, Http2ResetFrame resetFrame) {
        LOGGER.warn("Triple Client received remote reset errorCode=" + resetFrame.errorCode());
        transportListener.cancelByRemote(resetFrame.errorCode());
        ctx.close();
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) {
        transportListener.cancelByRemote(Http2Error.NO_ERROR.code());
        ctx.close();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        final TriRpcStatus status = TriRpcStatus.INTERNAL
            .withCause(cause);
        LOGGER.warn("Meet Exception on ClientResponseHandler, status code is: " + status.code,
            cause);
        transportListener.cancelByRemote(Http2Error.INTERNAL_ERROR.code());
        ctx.close();
    }

}

相关信息

dubbo 源码目录

相关文章

dubbo AbstractH2TransportListener 源码

dubbo GracefulShutdown 源码

dubbo H2TransportListener 源码

dubbo TripleClientHandler 源码

dubbo TripleCommandOutBoundHandler 源码

dubbo TripleHttp2FrameServerHandler 源码

dubbo TripleServerConnectionHandler 源码

dubbo TripleTailHandler 源码

dubbo WriteQueue 源码