In the previous tutorial, I introduced you how to work with .properties files using the Properties class. There are other needs related to configuration information of applications that this Properties class does not support, for example: Reusing properties that have been declared in other properties… Read More
.properties files are files used to configure information for the application. This is information that can change during the process of developing and deploying the application to the production environment. This information will be defined with key and value pairs in the .properties file, for… Read More
In the previous tutorial, I showed you how to type Query in GraphQL and also used Spring GraphQL together with Spring Data R2DBC to implement GraphQL request to query student information. To add, edit, or delete student information with GraphQL, we need to use type… Read More
Suppose I have a list of student information as follows:
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const students: Student[] = [ { id: "1", name: "Khanh" }, { id: "2", name: "Quan" }, ]; |
with the Student class with the following content:
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interface Student { id: string; name: string; } |
If I now define another class StudentInfo that also contains student information with more information about the class as follows:
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interface StudentInfo { id: string; studentName: string; className: string; } |
To convert the list… Read More
To convert a JSON data list string to a list of objects in TypeScript, you can use the parse() method of the JSON object. For example, I have a list of classes returned from the backend as a GraphQL response as follows:
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const response: any = `{ "data": { "clazzes": [ { "id": "1", "name": "A1" }, { "id": "2", "name": "A2" }, { "id": "3", "name": "B1" }, { "id": "4", "name": "B2" } ] } }`; |
On the… Read More
In the previous tutorial, I showed you how to configure Flyway with the Spring Boot application using Spring Data JDBC. If your Spring Boot application is using Spring Data R2DBC, then Flyway will not work. For example, I have a Spring Boot project with Flyway,… Read More
I introduced you to Spring Data R2DBC. With Spring Boot, configuring and using Spring Data R2DBC is much simpler and more convenient. How is it in detail? Let’s find out together in this tutorial! First, I will create a Spring Boot project with Spring Data… Read More
The connection pool is how we control the maximum number of connections open to a certain server or database. This is how we save and use resources rationally, avoiding waste. No server can handle an unlimited number of connections! When working with a reactive database… Read More
I introduced you to the Reactive Relational Database Connectivity (R2DBC) specs, about the Service Provider Interface library and the drivers that implement this SPI library in the previous tutorial. If your application uses Spring framework and wants to manipulate the database in a reactive mechanism,… Read More
Unlike the flatMap() method, the map() method of the Mono/Flux object in the Project Reactor will process the item being emitted, synchronously: In the image above, green, yellow, and blue items emitted by Publisher will be processed by the map() method synchronously. The return result… Read More
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