Tag：data source
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Time：2021-3-1
[springboot DB series] mybatis realizes multi data source switching based on abstractroutingdatasource and AOP The previous blog post introduced the configuration of multiple data sources in mybatis. In short, one data source is specified by one configuration, and mapper of different data sources is specified separately. This article will introduce another way, with the help […]
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Time：2021-2-25
The case of configuring multiple data sources in the spring boot project is often encountered in the development. In this paper, we use spring boot + mybatis to build a MySQL + PostgreSQL dual data source project. Please refer to: https://gitee.com/senn-wen/my… 1、 Dependency configuration staypom.xmlFilepostgresqland mysqlThe driver file for. <dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <scope>runtime</scope> </dependency> <!– […]
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Time：2021-2-24
Alink provides collecttodataframe() and fromdataframe() methods to realize the mutual conversion of dataframe and alink batch data. Alink batch data > dataframe If alink’s batch data source or calculation results can be transformed into Python’s dataframe, then Python’s rich function library and visualization function can be used for subsequent analysis and display. Each batch data […]
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Time：2021-2-22
At the recent GDG developer conference in Guangzhou, Dong Lin, senior technical director of getpush, took “SQL one-stop solution for heterogeneous data” as the theme, and deeply shared many years of practical experience of getpush in the field of SQL. This article will elaborate the unified SQL from three aspects 1、 Why unify SQL 2、 […]
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Time：2021-2-22
In the face of vast amounts of data on the Internet, how to quickly find the information you need? Search Engines! Input keywords, enter, massive results waiting for you to review. But in the enterprise environment, in the face of various IT systems, document libraries, and other kinds of data sources, how to quickly find […]
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Time：2021-2-15
Cover: Luo XiaoxiAuthor: Pan Pan The difficulty of doing big things is the same as that of doing small things. Both of them will consume your time and energy, so if you are determined to do something, do something big. Make sure your dream is worth pursuing and the future harvest is worthy of your […]
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Time：2021-2-15
How to upgrade the real-time data warehouse architecture based on the new API of Flink? Background Netease cloud music started to build a real-time computing platform in 2018. So far, it has developed to the following scale: Number of machines: 130+ Single Kafka peak QPS: 400W+ Number of online tasks: 500+ Developer: 160+ Business coverage: […]
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Time：2021-2-15
SparkContext Sparkcontext is the main entry of spark application, through which you can connect spark cluster, and create RDD, accumulator, broadcast variable, etc.; = = each start-up JVM can only have one sparkcontext. Before starting a new sparkcontext, you must stop the active sparkcontext = =. /** * Main entry point for Spark functionality. A […]
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Time：2021-2-12
The purpose of real time data warehouse construction Solve the problem of traditional data warehouse Real time data warehouse is a very confusing concept. The real-time data warehouse itself seems to be the same as turning the black background of PPT into whiter. From the traditional experience, we think that the data warehouse has a […]
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Time：2021-2-11
This paper mainly discusses how to use the Kafka connection components of alink (kafka011sourcestreamops and kafka011sinkstreamops) to read and write data. How do you need a local Kafka data source for experiment? You can refer to another article of mine, which introduces the process of building Kafka and topic in detail. Building Kafka on MacOS […]
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Time：2021-2-8
Click to get Tools > >[devexpress WinForms] can perfectly build smooth, beautiful and easy-to-use applications. It can be competent for office style interface, analysis and processing of large quantities of business data!In this article, we will summarize the new features that will be available in the v20.2 release of the devexpress WinForms layout / data […]
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Time：2021-2-6
The purpose of multiple data sources is that a code module can call the data of multiple databases for some business operations. The developer of mybatis plus wrote a multi data source calleddynamic-datasource-spring-boot-starterIt’s very easy to use. Dynamic datasource spring boot starter document Screenshot of official documents:Third party integration is basically the mainstream at present. […]
