Initiation the Java web application project in the Google App Engine
0 likes82 views
This document outlines the steps to create a Java web application project hosted on Google App Engine, including: 1. Understanding key concepts like Google App Engine, Java, Spring Framework, Apache Maven, and REST. 2. Creating a Google Cloud project and enabling the necessary APIs. 3. Installing software like the Google Cloud SDK, Java JDK, and Maven. 4. Generating a Spring Boot project locally and modifying the main class to add a GET endpoint. 5. Running the application locally and deploying it to App Engine using Maven and the gcloud CLI.
![Write your first web service, step 4
4. Modify the main class
SpringbootApplication.java (note
the filename - which is different by
default)
import org.springframework.boot.SpringApplication;
import
org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@SpringBootApplication
@RestController
public class SpringbootApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootApplication.class, args);
}
@GetMapping("/")
public String hello() {
return "Hello world!";
}
}
The modified class is a controller
that starts Spring Boot's embedded
Tomcat server and responds
to GET requests at the root path
('/') with the text "Hello world!](https://image.slidesharecdn.com/initiateae-221227173647-76bead40/85/Initiation-the-Java-web-application-project-in-the-Google-App-Engine-9-320.jpg)
More Related Content
Similar to Initiation the Java web application project in the Google App Engine (20)
More from University of Economics in Katowice (20)
Recently uploaded (20)
Initiation the Java web application project in the Google App Engine
- 1. Initiation the Java web application project in Google App Engine Artur Machura 24.12.2022, Katowice
- 2. Abstract Opening the presentation Introduction Main part Conclusion
- 3. Milestones 1. Create your project 2. Install the software needed for programming 3. Write your web service 4. Deploy your web service
- 4. Understand the basics concepts before you start 1. Google App Engine GAE (at https://cloud.google.com/appengine, distinguish at the outset the Google Web Toolkit GWT) 2. JAVA (this is one of the languages supported by GAE, the others are for example Python, Go etc. https://www.java.com/ ) 3. Spring (there are many projects related to this concept, e.g. spring framework, spring boot and others https://spring.io/projects ) 4. Apache Maven and Apache Tomcat (https://www.apache.org/ ) 5. REST (Representational State Transfer, https://www.ics.uci.edu/~fielding/pubs/dissertation/top.htm )
- 5. Create your project (an option based on a web browser is described, another is based on the google CLI) 1. Log in to your google account (or create an account) https://bit.ly/3GgoEYF 2. Create your first Google cloud project (https://bit.ly/3VqMCVg ) 3. Activate your billing account (you get $300 initially, https://bit.ly/3WJHgFY ) 4. Enable the API (https://bit.ly/3ji2Dzu ) 5. Create an App Engine application for your Cloud project (https://bit.ly/3jlLzsl )
- 6. Install the software needed for programming (step 1 -2) 1. Google Cloud CLI (https://cloud.google.com/sdk/docs/install ) You must initialize it https://cloud.google.com/sdk/docs/initializing (include command: gcloud components update) 2. Java SE 17 Development Kit (https://www.oracle.com/java/technologies/downloads/ )
- 7. Install the software needed for programming (step 3) 3. Apache Maven (https://maven.apache.org/download.cgi ) To deploy using Maven, you will need to add the App Engine Maven Plugin to yout pom.xml file <plugin> <groupId>com.google.cloud.tools</groupId> <artifactId>appengine-maven-plugin</artifactId> <version>2.4.4</version> </plugin>
- 8. Write your first web service, step 1 - 3 (locally on your computer) 1. Go to the Spring Iinitializr page (https://start.spring.io/ ) 2. Generate a Spring Boot project (options in this case are: maven, java 17) 3. Unpack it in a local folder (to user's home directory .m2repository)
- 9. Write your first web service, step 4 4. Modify the main class SpringbootApplication.java (note the filename - which is different by default) import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication @RestController public class SpringbootApplication { public static void main(String[] args) { SpringApplication.run(SpringbootApplication.class, args); } @GetMapping("/") public String hello() { return "Hello world!"; } } The modified class is a controller that starts Spring Boot's embedded Tomcat server and responds to GET requests at the root path ('/') with the text "Hello world!
- 10. Write your first web service, step 4 1. Running the server locally (google CLI) mvn spring-boot:run 2. In your web browser, enter the following address: http://localhost:8080 ! The Hello World message from the sample app displays on the page. In your terminal window, press Ctrl+C to exit the web server.
- 11. Deploy your web service (to the cloud platform) step 1-2 1. Add an app.yaml file to deploy your service to App Engine (to user's home directory.m2repositoryspringbootsrcmainappengine) 2. Edit an app.yaml file runtime: java17
- 12. Deploy your web service (to the cloud platform) step 3 1. In your java folder, where your Maven pom.xml file is located, run the followien command in you terminal: gcloud app deploy 2. Viewing your service, use the following command: gcloud app browse My first app: https://spry-ivy-371806.lm.r.appspot.com/
- 13. Source Java 11/17 runtime environment https://cloud.google.com/appengine/docs/standard/java-gen2/runtime and others mentioned in the presentation
- 14. Thank you for your attention! Please submit any comments on the software-engineers.org PhD Artur Machura arturmachura.info