dubbo DubboCountCodec 源码

dubbo DubboCountCodec 代码

文件路径：/dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/DubboCountCodec.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.dubbo;

import org.apache.dubbo.remoting.Channel;
import org.apache.dubbo.remoting.Codec2;
import org.apache.dubbo.remoting.buffer.ChannelBuffer;
import org.apache.dubbo.remoting.exchange.Request;
import org.apache.dubbo.remoting.exchange.Response;
import org.apache.dubbo.remoting.exchange.support.MultiMessage;
import org.apache.dubbo.rpc.AppResponse;
import org.apache.dubbo.rpc.RpcInvocation;
import org.apache.dubbo.rpc.model.FrameworkModel;

import java.io.IOException;

import static org.apache.dubbo.rpc.Constants.INPUT_KEY;
import static org.apache.dubbo.rpc.Constants.OUTPUT_KEY;

public final class DubboCountCodec implements Codec2 {

    private DubboCodec codec;
    private FrameworkModel frameworkModel;

    public DubboCountCodec(FrameworkModel frameworkModel) {
        this.frameworkModel = frameworkModel;
        codec = new DubboCodec(frameworkModel);
    }

    @Override
    public void encode(Channel channel, ChannelBuffer buffer, Object msg) throws IOException {
        codec.encode(channel, buffer, msg);
    }

    @Override
    public Object decode(Channel channel, ChannelBuffer buffer) throws IOException {
        int save = buffer.readerIndex();
        MultiMessage result = MultiMessage.create();
        do {
            Object obj = codec.decode(channel, buffer);
            if (Codec2.DecodeResult.NEED_MORE_INPUT == obj) {
                buffer.readerIndex(save);
                break;
            } else {
                result.addMessage(obj);
                logMessageLength(obj, buffer.readerIndex() - save);
                save = buffer.readerIndex();
            }
        } while (true);
        if (result.isEmpty()) {
            return Codec2.DecodeResult.NEED_MORE_INPUT;
        }
        if (result.size() == 1) {
            return result.get(0);
        }
        return result;
    }

    private void logMessageLength(Object result, int bytes) {
        if (bytes <= 0) {
            return;
        }
        if (result instanceof Request) {
            try {
                ((RpcInvocation) ((Request) result).getData()).setAttachment(INPUT_KEY, String.valueOf(bytes));
            } catch (Throwable e) {
                /* ignore */
            }
        } else if (result instanceof Response) {
            try {
                ((AppResponse) ((Response) result).getResult()).setAttachment(OUTPUT_KEY, String.valueOf(bytes));
            } catch (Throwable e) {
                /* ignore */
            }
        }
    }

}

相关信息

dubbo 源码目录

相关文章

dubbo CallbackServiceCodec 源码

dubbo ChannelWrappedInvoker 源码

dubbo Constants 源码

dubbo DecodeableRpcInvocation 源码

dubbo DecodeableRpcResult 源码

dubbo DubboCodec 源码

dubbo DubboCodecSupport 源码

dubbo DubboExporter 源码

dubbo DubboInvoker 源码

dubbo DubboProtocol 源码