public long getIndexId() {
        return this.indexId;
    }
Set the filtering items that need to be filtered and the message forwarding time

@param msgType   the ID of the stream that needs to be filtered,
                if not required, set null
@param msgTime   the time when the message was sent, the format is yyyyMMddHHmm,
                 if not required, set null
inlong-tubemq/tubemq-core/src/main/java/org/apache/inlong/tubemq/corebase/Message.java