Java Response.setErrorMessage方法代码示例

import com.alibaba.dubbo.remoting.exchange.Response; //导入方法依赖的package包/类
public void run() {
    while (true) {
        try {
            for (DefaultFuture future : FUTURES.values()) {
                if (future == null || future.isDone()) {
                    continue;
                }
                if (System.currentTimeMillis() - future.getStartTimestamp() > future.getTimeout()) {
                    // create exception response.
                    Response timeoutResponse = new Response(future.getId());
                    // set timeout status.
                    timeoutResponse.setStatus(future.isSent() ? Response.SERVER_TIMEOUT : Response.CLIENT_TIMEOUT);
                    timeoutResponse.setErrorMessage(future.getTimeoutMessage(true));
                    // handle response.
                    DefaultFuture.received(future.getChannel(), timeoutResponse);
                }
            }
            Thread.sleep(30);
        } catch (Throwable e) {
            logger.error("Exception when scan the timeout invocation of remoting.", e);
        }
    }
}
 

import com.alibaba.dubbo.remoting.exchange.Response; //导入方法依赖的package包/类
public void caught(Channel channel, Throwable exception) throws RemotingException {
    if (exception instanceof ExecutionException) {
        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;
            }
        }
    }
    ExchangeChannel exchangeChannel = HeaderExchangeChannel.getOrAddChannel(channel);
    try {
        handler.caught(exchangeChannel, exception);
    } finally {
        HeaderExchangeChannel.removeChannelIfDisconnected(channel);
    }
}
 

import com.alibaba.dubbo.remoting.exchange.Response; //导入方法依赖的package包/类
public void cancel(){
    Response errorResult = new Response(id);
    errorResult.setErrorMessage("request future has been canceled.");
    response = errorResult ;
    FUTURES.remove(id);
    CHANNELS.remove(id);
}
 

import com.alibaba.dubbo.remoting.exchange.Response; //导入方法依赖的package包/类
@Test 
    public void test_Encode_Error_Response() throws IOException{
        ChannelBuffer encodeBuffer = ChannelBuffers.dynamicBuffer(1024);
        Channel channel = getCliendSideChannel(url);
        Response response = new Response();
        response.setHeartbeat(true);
        response.setId(1001l);
        response.setStatus((byte)10 );
        response.setVersion("11");
        String badString = "bad" ;
        response.setErrorMessage(badString);
        Person person = new Person();
        response.setResult(person);
        
        codec.encode(channel, encodeBuffer, response);
        byte[] data = new byte[encodeBuffer.writerIndex()];
        encodeBuffer.readBytes(data);

        //encode resault check need decode 
        ChannelBuffer decodeBuffer = ChannelBuffers.wrappedBuffer(data);
        Response obj = (Response)codec.decode(channel, decodeBuffer);
        Assert.assertEquals(response.getId(), obj.getId());
        Assert.assertEquals(response.getStatus(), obj.getStatus());
        Assert.assertEquals(response.isHeartbeat(), obj.isHeartbeat());
        Assert.assertEquals(badString, obj.getErrorMessage());
        Assert.assertEquals(null, obj.getResult());
//        Assert.assertEquals(response.getVersion(), obj.getVersion());
    }
 

import com.alibaba.dubbo.remoting.exchange.Response; //导入方法依赖的package包/类
protected void encodeResponse(Channel channel, ChannelBuffer buffer, Response res) throws IOException {
    try {
        Serialization serialization = getSerialization(channel);
        // header.
        byte[] header = new byte[HEADER_LENGTH];
        // set magic number.
        Bytes.short2bytes(MAGIC, header);
        // set request and serialization flag.
        header[2] = serialization.getContentTypeId();
        if (res.isHeartbeat()) header[2] |= FLAG_EVENT;
        // set response status.
        byte status = res.getStatus();
        header[3] = status;
        // set request id.
        Bytes.long2bytes(res.getId(), header, 4);

        int savedWriteIndex = buffer.writerIndex();
        buffer.writerIndex(savedWriteIndex + HEADER_LENGTH);
        ChannelBufferOutputStream bos = new ChannelBufferOutputStream(buffer);
        ObjectOutput out = serialization.serialize(channel.getUrl(), bos);
        try {
            // encode response data or error message.
            if (status == Response.OK) {
                if (res.isHeartbeat()) {
                    encodeHeartbeatData(channel, out, res.getResult());
                } else {
                    encodeResponseData(channel, out, res.getResult());
                }
            }
            else out.writeUTF(res.getErrorMessage());
            out.flushBuffer();
        } finally {
            // modified by lishen
            if (out instanceof Cleanable) {
                ((Cleanable) out).cleanup();
            }
        }

        bos.flush();
        bos.close();

        int len = bos.writtenBytes();
        checkPayload(channel, len);
        Bytes.int2bytes(len, header, 12);
        // write
        buffer.writerIndex(savedWriteIndex);
        buffer.writeBytes(header); // write header.
        buffer.writerIndex(savedWriteIndex + HEADER_LENGTH + len);
    } catch (Throwable t) {
        // 发送失败信息给Consumer，否则Consumer只能等超时了
        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);
            }
        }
        
        // 重新抛出收到的异常
        if (t instanceof IOException) {
            throw (IOException) t;
        } else if (t instanceof RuntimeException) {
            throw (RuntimeException) t;
        } else if (t instanceof Error) {
            throw (Error) t;
        } else  {
            throw new RuntimeException(t.getMessage(), t);
        }
    }
}
 

import com.alibaba.dubbo.remoting.exchange.Response; //导入方法依赖的package包/类
protected void encodeResponse(Channel channel, OutputStream os, Response res) throws IOException {
    try {
        Serialization serialization = CodecSupport.getSerialization(channel.getUrl());
        // header.
        byte[] header = new byte[HEADER_LENGTH];
        // set magic number.
        Bytes.short2bytes(MAGIC, header);
        // set request and serialization flag.
        header[2] = serialization.getContentTypeId();
        if (res.isHeartbeat()) header[2] |= FLAG_EVENT;
        // set response status.
        byte status = res.getStatus();
        header[3] = status;
        // set request id.
        Bytes.long2bytes(res.getId(), header, 4);

        UnsafeByteArrayOutputStream bos = new UnsafeByteArrayOutputStream(1024);
        ObjectOutput out = serialization.serialize(channel.getUrl(), bos);
        // encode response data or error message.
        if (status == Response.OK) {
            if (res.isHeartbeat()) {
                encodeHeartbeatData(channel, out, res.getResult());
            } else {
                encodeResponseData(channel, out, res.getResult());
            }
        } else out.writeUTF(res.getErrorMessage());
        out.flushBuffer();
        bos.flush();
        bos.close();

        byte[] data = bos.toByteArray();
        checkPayload(channel, data.length);
        Bytes.int2bytes(data.length, header, 12);
        // write
        os.write(header); // write header.
        os.write(data); // write data.
    } catch (Throwable t) {
        // 发送失败信息给Consumer，否则Consumer只能等超时了
        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);
            }
        }

        // 重新抛出收到的异常
        if (t instanceof IOException) {
            throw (IOException) t;
        } else if (t instanceof RuntimeException) {
            throw (RuntimeException) t;
        } else if (t instanceof Error) {
            throw (Error) t;
        } else {
            throw new RuntimeException(t.getMessage(), t);
        }
    }
}