com.alibaba.rocketmq.common.protocol.header.ViewMessageRequestHeader Java Examples

The following examples show how to use com.alibaba.rocketmq.common.protocol.header.ViewMessageRequestHeader. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: QueryMessageProcessor.java From reading-and-annotate-rocketmq-3.4.6 with GNU General Public License v3.0

4 votes

public RemotingCommand viewMessageById(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    final ViewMessageRequestHeader requestHeader =
            (ViewMessageRequestHeader) request.decodeCommandCustomHeader(ViewMessageRequestHeader.class);

    response.setOpaque(request.getOpaque());

    final SelectMapedBufferResult selectMapedBufferResult =
            this.brokerController.getMessageStore().selectOneMessageByOffset(requestHeader.getOffset());
    if (selectMapedBufferResult != null) {
        response.setCode(ResponseCode.SUCCESS);
        response.setRemark(null);

        try {
            FileRegion fileRegion =
                    new OneMessageTransfer(response.encodeHeader(selectMapedBufferResult.getSize()),
                        selectMapedBufferResult);
            ctx.channel().writeAndFlush(fileRegion).addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    selectMapedBufferResult.release();
                    if (!future.isSuccess()) {
                        log.error("transfer one message by pagecache failed, ", future.cause());
                    }
                }
            });
        }
        catch (Throwable e) {
            log.error("", e);
            selectMapedBufferResult.release();
        }

        return null;
    }
    else {
        response.setCode(ResponseCode.SYSTEM_ERROR);
        response.setRemark("can not find message by the offset, " + requestHeader.getOffset());
    }

    return response;
}

Example #2

Source File: QueryMessageProcessor.java From rocketmq with Apache License 2.0

4 votes

public RemotingCommand viewMessageById(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    final ViewMessageRequestHeader requestHeader =
            (ViewMessageRequestHeader) request.decodeCommandCustomHeader(ViewMessageRequestHeader.class);


    response.setOpaque(request.getOpaque());

    final SelectMapedBufferResult selectMapedBufferResult =
            this.brokerController.getMessageStore().selectOneMessageByOffset(requestHeader.getOffset());
    if (selectMapedBufferResult != null) {
        response.setCode(ResponseCode.SUCCESS);
        response.setRemark(null);

        try {
            FileRegion fileRegion =
                    new OneMessageTransfer(response.encodeHeader(selectMapedBufferResult.getSize()),
                            selectMapedBufferResult);
            ctx.channel().writeAndFlush(fileRegion).addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    selectMapedBufferResult.release();
                    if (!future.isSuccess()) {
                        log.error("transfer one message by pagecache failed, ", future.cause());
                    }
                }
            });
        } catch (Throwable e) {
            log.error("", e);
            selectMapedBufferResult.release();
        }

        return null;
    } else {
        response.setCode(ResponseCode.SYSTEM_ERROR);
        response.setRemark("can not find message by the offset, " + requestHeader.getOffset());
    }

    return response;
}

Example #3

Source File: QueryMessageProcessor.java From RocketMQ-Master-analyze with Apache License 2.0

4 votes

public RemotingCommand viewMessageById(ChannelHandlerContext ctx, RemotingCommand request)
        throws RemotingCommandException {
    final RemotingCommand response = RemotingCommand.createResponseCommand(null);
    final ViewMessageRequestHeader requestHeader =
            (ViewMessageRequestHeader) request.decodeCommandCustomHeader(ViewMessageRequestHeader.class);

    // 由于使用sendfile，所以必须要设置
    response.setOpaque(request.getOpaque());

    final SelectMapedBufferResult selectMapedBufferResult =
            this.brokerController.getMessageStore().selectOneMessageByOffset(requestHeader.getOffset());
    if (selectMapedBufferResult != null) {
        response.setCode(ResponseCode.SUCCESS);
        response.setRemark(null);

        try {
            FileRegion fileRegion = new OneMessageTransfer(
                response.encodeHeader(selectMapedBufferResult.getSize()), selectMapedBufferResult);
            ctx.channel().writeAndFlush(fileRegion).addListener(new ChannelFutureListener() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    selectMapedBufferResult.release();
                    if (!future.isSuccess()) {
                        log.error("transfer one message by pagecache failed, ", future.cause());
                    }
                }
            });
        }
        catch (Throwable e) {
            log.error("", e);
            selectMapedBufferResult.release();
        }

        return null;
    }
    else {
        response.setCode(ResponseCode.SYSTEM_ERROR);
        response.setRemark("can not find message by the offset, " + requestHeader.getOffset());
    }

    return response;
}