Fengdi Li | 李锋镝

autumn in beijing

Original link: https://www.lifengdi.com/archives/daily/3997 Unless otherwise specified, it is Li Fengdi’s blog – LiFengdi.Com’s original article. Reprints must be marked with a link to this article. Link to this article: https://ift.tt/owFEVQd This article is reprinted from: https://www.lifengdi.com/archives/daily/3997 This site is for inclusion only, and the copyright belongs to the original author.

OHCache usage

Original link: https://www.lifengdi.com/archives/article/tech/3992 OHCache Introduction The caching framework OHC is implemented based on the Java language, and is called by other Java programs in the form of a class library. It is an off-heap cache that runs in stand-alone mode. Introduction to OHC There are various types of caching and implementation mechanisms, including stand-alone caching …

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Dong Yuhui’s recommended book list

Original link: https://www.lifengdi.com/archives/daily/3987 NO1, “Ordinary World” Dong Yuhui read “Ordinary World” 6 times, you and I were born ordinary, without the aura of God. Your life is not going to be smooth sailing, and you only know the power contained in this book when you go through lows. When you read it for the first …

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SpringBoot integrates MongoDB

Original link: https://www.lifengdi.com/archives/transport/technology/3986 1. Introduction In the previous article, we introduced the configuration and use of MongoDB in detail. If you don’t know much about MongoDB, it doesn’t matter. There are three more important terms in MongoDB: database, collection, document! Database: Like relational databases, each database has its own user permissions, and different project groups …

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I feel it~

Original link: https://www.lifengdi.com/archives/daily/3981 At first, no one cared about this disaster. It was nothing but a wildfire, a drought, the extinction of a species, the disappearance of a city… Unless otherwise noted, all are Li Fengdi’s blog – LiFengdi.Com original article, Reprints must indicate the link to this article in the form of a link: …

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RocketMQ introductory tutorial

Original link: https://www.lifengdi.com/archives/transport/technology/3959 Foreword RocketMQ is an open source MQ framework owned by Alibaba. It has undergone the test of Double Eleven and implemented in the Java programming language, and has a very good and complete ecosystem. RocketMQ, as an open source message middleware with pure java, distributed and queue model, supports transaction messages, sequential …

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Sapphire Case · Yuan Xi

Original link: https://www.lifengdi.com/archives/transport/literature-transport/3958 Qingyu Case Yuanxi [Author] Xin Qiji [Dynasty] Song Dongfeng put flowers and thousands of trees at night. More blowing, stars like rain. BMW carved cars fragrant all over the road. The sound of the phoenix flute moved, the jade pot turned brightly, and the fish and dragon danced overnight. Moth snow willow …

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Zhongyuan Festival: The heaven and earth have Zhongqi, the first is Zhongyuan

Original link: https://www.lifengdi.com/archives/others/3954 The fifteenth day of the seventh lunar month is called the “Zhongyuan Festival” and is commonly known as the Ghost Festival. The Zhongyuan Festival integrates the spirits of Confucianism, Buddhism and Taoism, and is one of the largest sacrificial festivals in China. In China, Zhongyuan, New Year’s Eve, Qingming, and Chongyang are …

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The pit of @Async annotation

Original link: https://www.lifengdi.com/archives/transport/technology/3953 Background Some time ago, a colleague, a young lady, told me that her project couldn’t get up, and asked me to take a look at it. In the spirit of helping others, I must help. So, I found the following exception information in her console: Exception in thread “main” org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating …

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Open FTP in Linux

Original link: https://www.lifengdi.com/archives/article/tech/3952 1. Install vsftpd sudo yum install -y vsftpd 2. Set vsftpd to start automatically after booting sudo systemctl enable vsftpd 3. Start the FTP service sudo systemctl start vsftpd 4. Confirm whether the service starts sudo netstat -antup | grep ftp 5. Create a user for the FTP service , for example, …

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Detailed explanation of RocketMQ’s push consumption method

Original link: https://www.lifengdi.com/archives/transport/technology/3937 MQ consumption mode Consumption mode refers to how consumers get messages from MQ, which is divided into two modes, push (push mode) and pull (pull mode). 1, push (push method) push, as the name suggests, means to push. That is, when MQ receives the message generated by the producer, it will actively …

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