Check out the full series of Questions Management tutorial here.
Composite Service is a service that will call different Core Services to perform the transform, aggregate data from that Core Service. In this first phase of our Question Management application, there will be 2 Composite Services, one for gathering information about questions including: category, question content and choices of questions; and another one is for options. For questions, this service is called Composite Question Service. In this tutorial, I will guide you all how to create Spring Boot project for Composite Question Service.
The steps to create a Spring Boot project, I have introduced for you. Here, I only mention some important points in the project creation process for Composite Question Service only.
In the New Spring Starter Project window, after filling in the information for our project, the Location section, we need point to the project questions-management directory:
As you can see in the project questions-management folder, I added a composite folder inside this folder to contain all the projects related to the Composite Service.
In the selection of dependencies to use for the composite-question-service project, because Composite Service will not have any operations on the database, we will only use the following dependencies:
- Reactive Web: See also Spring WebFlux
- Lombok: more about Introduction about Project Lombok
- DevTools: See also Introduction about DevTools in Spring Boot
Result:
Next, I’ll revise this project a little bit so that it uses the parent project of the project questions-management.
In the project’s pom.xml file, I will delete the current <parent> and <properties> declarations for using the parent project of the project questions-management:
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<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <artifactId>composite-question-service</artifactId> <name>composite-question-service</name> <description>Composite Question Service for Questions Management</description> <parent> <groupId>com.huongdanjava</groupId> <artifactId>questions-management</artifactId> <version>0.0.1-SNAPSHOT</version> <relativePath>../../pom.xml</relativePath> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-webflux</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>io.projectreactor</groupId> <artifactId>reactor-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> |
Then declare the composite-question-service project as a module of the project questions-management as follows:
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.huongdanjava</groupId> <artifactId>questions-management</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>pom</packaging> <name>Questions Management System</name> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.3.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <modules> <module>core/core-category-service</module> <module>core/core-question-service</module> <module>core/core-option-service</module> <module>composite/composite-question-service</module> </modules> </project> |
