Package com.alibaba.dubbo.remoting.exchange

Examples of com.alibaba.dubbo.remoting.exchange.Response

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            if (! res.isEvent() && res.getStatus() != Response.BAD_RESPONSE) {
                try {
                    // FIXME 在Codec中打印出错日志？在IoHanndler的caught中统一处理？
                    logger.warn("Fail to encode response: " + res + ", send bad_response info instead, cause: " + t.getMessage(), t);
                   
                    Response r = new Response(res.getId(), res.getVersion());
                    r.setStatus(Response.BAD_RESPONSE);
                    r.setErrorMessage("Failed to send response: " + res + ", cause: " + StringUtils.toString(t));
                    channel.send(r);
                   
                    return;
                } catch (RemotingException e) {
                    logger.warn("Failed to send bad_response info back: " + res + ", cause: " + e.getMessage(), e);
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        ObjectInput in = s.deserialize(channel.getUrl(), is);
        // get request id.
        long id = Bytes.bytes2long(header, 4);
        if( ( flag & FLAG_REQUEST ) == 0 ) {
            // decode response.
            Response res = new Response(id);
            if (( flag & FLAG_EVENT ) != 0){
                res.setEvent(Response.HEARTBEAT_EVENT);
            }
            // get status.
            byte status = header[3];
            res.setStatus(status);
            if( status == Response.OK ) {
                try {
                    Object data;
                    if (res.isHeartbeat()) {
                        data = decodeHeartbeatData(channel, in);
                    } else if (res.isEvent()) {
                        data = decodeEventData(channel, in);
                    } else {
                        data = decodeResponseData(channel, in, getRequestData(id));
                    }
                    res.setResult(data);
                } catch (Throwable t) {
                    res.setStatus(Response.CLIENT_ERROR);
                    res.setErrorMessage(StringUtils.toString(t));
                }
            } else {
                res.setErrorMessage(in.readUTF());
            }
            return res;
        } else {
            // decode request.
            Request req = new Request(id);
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            if (! res.isEvent() && res.getStatus() != Response.BAD_RESPONSE) {
                try {
                    // FIXME 在Codec中打印出错日志？在IoHanndler的caught中统一处理？
                    logger.warn("Fail to encode response: " + res + ", send bad_response info instead, cause: " + t.getMessage(), t);
                   
                    Response r = new Response(res.getId(), res.getVersion());
                    r.setStatus(Response.BAD_RESPONSE);
                    r.setErrorMessage("Failed to send response: " + res + ", cause: " + StringUtils.toString(t));
                    channel.send(r);
                   
                    return;
                } catch (RemotingException e) {
                    logger.warn("Failed to send bad_response info back: " + res + ", cause: " + e.getMessage(), e);
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        if (req.getData() != null && req.getData().equals(Request.READONLY_EVENT)){
            channel.setAttribute(Constants.CHANNEL_ATTRIBUTE_READONLY_KEY, Boolean.TRUE);
        }
        if (req.isTwoWay()){
            if (req.isHeartbeat()) {
                Response res = new Response(req.getId(), req.getVersion());
                res.setEvent(req.getData() == null ? null : req.getData().toString());
                channel.send(res);
            }
        }
    }
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            }
        }
    }

    Response handleRequest(ExchangeChannel channel, Request req) throws RemotingException {
        Response res = new Response(req.getId(), req.getVersion());
        if (req.isBroken()) {
            Object data = req.getData();

            String msg;
            if (data == null) msg = null;
            else if (data instanceof Throwable) msg = StringUtils.toString((Throwable) data);
            else msg = data.toString();
            res.setErrorMessage("Fail to decode request due to: " + msg);
            res.setStatus(Response.BAD_REQUEST);

            return res;
        }
        // find handler by message class.
        Object msg = req.getData();
        try {
            // handle data.
            Object result = handler.reply(channel, msg);
            res.setStatus(Response.OK);
            res.setResult(result);
        } catch (Throwable e) {
            res.setStatus(Response.SERVICE_ERROR);
            res.setErrorMessage(StringUtils.toString(e));
        }
        return res;
    }
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                Request request = (Request) message;
                if (request.isEvent()){
                    handlerEvent(channel, request);
                } else {
                    if (request.isTwoWay()) {
                        Response response = handleRequest(exchangeChannel, request);
                        channel.send(response);
                    } else {
                        handler.received(exchangeChannel, request.getData());
                    }
                }
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            ExecutionException e = (ExecutionException) exception;
            Object msg = e.getRequest();
            if (msg instanceof Request) {
                Request req = (Request) msg;
                if (req.isTwoWay() && ! req.isHeartbeat()) {
                    Response res = new Response(req.getId(), req.getVersion());
                    res.setStatus(Response.SERVER_ERROR);
                    res.setErrorMessage(StringUtils.toString(e));
                    channel.send(res);
                    return;
                }
            }
        }
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        }
        return returnFromResponse();
    }
   
    public void cancel(){
        Response errorResult = new Response(id);
        errorResult.setErrorMessage("request future has been canceled.");
        response = errorResult ;
        FUTURES.remove(id);
        CHANNELS.remove(id);
    }
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        ResponseCallback callbackCopy = c;
        if (callbackCopy == null){
            throw new NullPointerException("callback cannot be null.");
        }
        c = null;
        Response res = response;
        if (res == null) {
            throw new IllegalStateException("response cannot be null. url:"+channel.getUrl());
        }
       
        if (res.getStatus() == Response.OK) {
            try {
                callbackCopy.done(res.getResult());
            } catch (Exception e) {
                logger.error("callback invoke error .reasult:" + res.getResult() + ",url:" + channel.getUrl(), e);
            }
        } else if (res.getStatus() == Response.CLIENT_TIMEOUT || res.getStatus() == Response.SERVER_TIMEOUT) {
            try {
                TimeoutException te = new TimeoutException(res.getStatus() == Response.SERVER_TIMEOUT, channel, res.getErrorMessage());
                callbackCopy.caught(te);
            } catch (Exception e) {
                logger.error("callback invoke error ,url:" + channel.getUrl(), e);
            }
        } else {
            try {
                RuntimeException re = new RuntimeException(res.getErrorMessage());
                callbackCopy.caught(re);
            } catch (Exception e) {
                logger.error("callback invoke error ,url:" + channel.getUrl(), e);
            }
        }
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            }
        }
    }

    private Object returnFromResponse() throws RemotingException {
        Response res = response;
        if (res == null) {
            throw new IllegalStateException("response cannot be null");
        }
        if (res.getStatus() == Response.OK) {
            return res.getResult();
        }
        if (res.getStatus() == Response.CLIENT_TIMEOUT || res.getStatus() == Response.SERVER_TIMEOUT) {
            throw new TimeoutException(res.getStatus() == Response.SERVER_TIMEOUT, channel, res.getErrorMessage());
        }
        throw new RemotingException(channel, res.getErrorMessage());
    }
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Related Classes of com.alibaba.dubbo.remoting.exchange.Response

  • com.alibaba.dubbo.examples.heartbeat.HeartBeatExchangeHandler
  • com.alibaba.dubbo.remoting.codec.ExchangeCodecTest
  • com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec
  • com.alibaba.dubbo.remoting.exchange.support.DefaultFuture
  • com.alibaba.dubbo.remoting.exchange.support.DefaultFuture$RemotingInvocationTimeoutScan
  • com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeHandler
  • com.alibaba.dubbo.remoting.exchange.support.header.HeartbeatHandler
  • com.alibaba.dubbo.remoting.handler.HeaderExchangeHandlerTest
  • com.alibaba.dubbo.remoting.transport.codec.DeprecatedExchangeCodec
  • com.alibaba.dubbo.remoting.transport.dispather.WrappedChannelHandler
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