rocketmq源码解析之NamesrvController启动②mqclient admin请求处理之获取全部topic配置

说在前面

今天解析管理请求处理之GET_ALL_TOPIC_CONFIG获取全部topic配置信息

 

源码解析

进入这个方法org.apache.rocketmq.broker.processor.AdminBrokerProcessor#getAllTopicConfig

private RemotingCommand getAllTopicConfig(ChannelHandlerContext ctx, RemotingCommand request) {
        final RemotingCommand response = RemotingCommand.createResponseCommand(GetAllTopicConfigResponseHeader.class);
        // final GetAllTopicConfigResponseHeader responseHeader =
        // (GetAllTopicConfigResponseHeader) response.readCustomHeader();
//      从本地缓存中获取信息
        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;
    }

进入这个方法org.apache.rocketmq.broker.topic.TopicConfigManager#encode(boolean) 对topicConfig信息进行json编码

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

往上返回到这个方法org.apache.rocketmq.broker.processor.AdminBrokerProcessor#getAllTopicConfig 解析结束。

 

说在最后

本次解析仅表明我的观点，仅供参考。

 

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