Examples of QueryConsumerOffsetResponseHeader

Examples of com.alibaba.rocketmq.common.protocol.header.QueryConsumerOffsetResponseHeader

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    private RemotingCommand queryConsumerOffset(ChannelHandlerContext ctx, RemotingCommand request)
            throws RemotingCommandException {
        final RemotingCommand response =
                RemotingCommand.createResponseCommand(QueryConsumerOffsetResponseHeader.class);
        final QueryConsumerOffsetResponseHeader responseHeader =
                (QueryConsumerOffsetResponseHeader) response.getCustomHeader();
        final QueryConsumerOffsetRequestHeader requestHeader =
                (QueryConsumerOffsetRequestHeader) request
                    .decodeCommandCustomHeader(QueryConsumerOffsetRequestHeader.class);

        long offset =
                this.brokerController.getConsumerOffsetManager().queryOffset(
                    requestHeader.getConsumerGroup(), requestHeader.getTopic(), requestHeader.getQueueId());

        // 订阅组存在
        if (offset >= 0) {
            responseHeader.setOffset(offset);
            response.setCode(ResponseCode.SUCCESS);
            response.setRemark(null);
        }
        // 订阅组不存在
        else {
            long minOffset =
                    this.brokerController.getMessageStore().getMinOffsetInQuque(requestHeader.getTopic(),
                        requestHeader.getQueueId());
            // 订阅组不存在情况下，如果这个队列的消息最小Offset是0，则表示这个Topic上线时间不长，服务器堆积的数据也不多，那么这个订阅组就从0开始消费。
            // 尤其对于Topic队列数动态扩容时，必须要从0开始消费。
            if (minOffset <= 0) {
                responseHeader.setOffset(0L);
                response.setCode(ResponseCode.SUCCESS);
                response.setRemark(null);
            }
            // 新版本服务器不做消费进度纠正
            else {
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Examples of com.alibaba.rocketmq.common.protocol.header.QueryConsumerOffsetResponseHeader

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        RemotingCommand response = this.remotingClient.invokeSync(addr, request, timeoutMillis);
        assert response != null;
        switch (response.getCode()) {
        case ResponseCode.SUCCESS: {
            QueryConsumerOffsetResponseHeader responseHeader =
                    (QueryConsumerOffsetResponseHeader) response
                        .decodeCommandCustomHeader(QueryConsumerOffsetResponseHeader.class);

            return responseHeader.getOffset();
        }
        default:
            break;
        }
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