rocketmq源碼解析之NamesrvController啓動②mqclient admin請求處理之獲取全部topic配置

時間 2019-11-11

標籤 rocketmq 源碼解析 namesrvcontroller 啓動 mqclient admin 請求處理獲取全部 topic 配置简体版

原文原文鏈接

說在前面apache

今天解析管理請求處理之GET_ALL_TOPIC_CONFIG獲取全部topic配置信息json

源碼解析緩存

進入這個方法org.apache.rocketmq.broker.processor.AdminBrokerProcessor#getAllTopicConfig微信

private RemotingCommand getAllTopicConfig(ChannelHandlerContext ctx, RemotingCommand request) {
        final RemotingCommand response = RemotingCommand.createResponseCommand(GetAllTopicConfigResponseHeader.class);
        // final GetAllTopicConfigResponseHeader responseHeader =
        // (GetAllTopicConfigResponseHeader) response.readCustomHeader();
//      從本地緩存中獲取信息
        String content = this.brokerController.getTopicConfigManager().encode();
        if (content != null && content.length() > 0) {
            try {
                response.setBody(content.getBytes(MixAll.DEFAULT_CHARSET));
            } catch (UnsupportedEncodingException e) {
                log.error("", e);
                response.setCode(ResponseCode.SYSTEM_ERROR);
                response.setRemark("UnsupportedEncodingException " + e);
                return response;
            }
        } else {
            log.error("No topic in this broker, client: {}", ctx.channel().remoteAddress());
            response.setCode(ResponseCode.SYSTEM_ERROR);
            response.setRemark("No topic in this broker");
            return response;
        }

        response.setCode(ResponseCode.SUCCESS);
        response.setRemark(null);
        return response;
    }

進入這個方法org.apache.rocketmq.broker.topic.TopicConfigManager#encode(boolean) 對topicConfig信息進行json編碼app

public String encode(final boolean prettyFormat) {
    TopicConfigSerializeWrapper topicConfigSerializeWrapper = new TopicConfigSerializeWrapper();
    topicConfigSerializeWrapper.setTopicConfigTable(this.topicConfigTable);
    topicConfigSerializeWrapper.setDataVersion(this.dataVersion);
    return topicConfigSerializeWrapper.toJson(prettyFormat);
}

往上返回到這個方法org.apache.rocketmq.broker.processor.AdminBrokerProcessor#getAllTopicConfig 解析結束。this

說在最後編碼

本次解析僅表明我的觀點，僅供參考。code

加入技術微信羣orm