Tag：data source
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Ali low code engine | lowcodeengine – how to configure and call requests
Starting inLanguage bird document @ blueju preface Sending requests is a very important and common part of the front-end. Naturally, Alibaba low code engine will not lack this part.In Alibaba low code engine, the request is configured in the data source. The location of the data source is shown in the figure below: to configure […]
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Spring learning notes
catalogue 1、 Spring files and notes 1. All spring configuration files pom.xml applicationContext.xml Main.java UserDao.java UserDaoImpl.java 2. All annotations of spring configuration 3. Key fundamentals of spring 1. Explanation of terms 2. Bean life cycle: 1 instantiation, 2 attribute assignment, 3 initialization, 4 use, 5 destruction 3. Bean tag attribute 4. Spring core: 4. Bean […]
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[micro service technology topic] Netflix dynamic configuration service – micro service configuration component chameleon archaius
Premise introduction If you want to design and develop a set of micro service infrastructure, parametric configuration is a very important point, and Netflix also open source a configuration center client called chameleon archaius, and archaius can be said to have more production-level features and more flexibility than other clients. In netflixoss microservice technology stack, […]
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Recommend an ORM framework called hasordb, which is currently version 4.3.0
introduce Hasordb is a full-featured database access tool, which provides object mapping, rich type processing, dynamic SQL, stored procedures, built-in paging dialect 20 +It supports nested transactions, multiple data sources, conditional constructors, insert policies, and multiple statements / results. And compatible with spring and mybatis usage.It does not rely on any other framework, so it […]
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Implementation of real-time alarm based on Flink (2): reading data source
This topic will realize the alarm processing process from 0 to 1, and explain the technology in Flink used in the implementation process. 1 how Flink works The common way to use Flink is to use Flink as the processor between pipes. Flink reads data from the source, performs logical calculation, and writes the results […]
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[suggestion collection] take you back to vue2 and quickly master vue3 through differentiated comparative learning
The sea is wide, the fish leap, and the birds fly high. Hey, Hello! I’m Molly Vue3 has been released for some time. At the same time, it has been supported by major manufacturers and communities and loved by many developers. The surrounding ecology is also gradually improving. It can be said to be a […]
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DataTables in ASP Net MVC
preface Recently usedABP(ASP.NET Boilerplate)For new projects, I used to expand an htmlhelper to complete synchronous / asynchronous paging, but I’m not satisfied with one thing. Sorting is too hard.I’ve been in touch with a little DataTables before. I know that its sorting is very convenient. Click the header to sort. It also supports multi column […]
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N common mistakes when using @ transactional
@TransactionalIt is an annotation that we can hardly escape when using spring. This annotation is mainly used to declare transactions. Its implementation principle is to weave the implementation statements of transaction management before and after the annotation modification method through spring AOP, so developers only need one annotation to replace a series of cumbersome coding […]
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Android opencv development (II) face detection
The focus is face detection, detection, detection. Is to detect the face, not recognition, not recognition. The meaning of recognition is to detect the face, and obtain the face recognition degree through data comparison and algorithm analysis. And detection is just detection. For the whole network about Android opencv recognition XXX and other titles, but […]
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MySQL of spring boot realizes read-write separation
In high concurrency scenarios, what are the optimization methods for databases? Commonly used implementation methods include the following: read-write separation, caching, master-slave architecture cluster, sub database and sub table. In Internet applications, most of them are“Read more and write less”Set up two libraries, the main library and the read library,“The main database is responsible for […]
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OLAP engine: cross data source analysis based on Presto component
1、 Presto overview 1. Introduction to Presto Presto is an open source distributed SQL query engine, which is suitable for interactive analysis and query. The data volume supports GB to Pb bytes. Although Presto has the ability to parse SQL, it does not belong to the standard database category. Presto supports online data query, including […]