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BAEL-2906 Functional Controllers in Spring MVC (#6972) 

* BAEL-2906 Functional Controllers in Spring MVC

* BAEL-2906 Functional Controllers in Spring MVC

* BAEL-2906 Functional Controllers in Spring MVC

* BAEL-2906 Removed unnecessary files

* BAEL-2906 Removed project

* BAEL-2906 Removed comments
This commit is contained in:
josephine-barboza 2019-07-30 03:14:52 +05:30 committed by ashleyfrieze
parent 8f5bb3c6a9
commit d9a20d1764
9 changed files with 378 additions and 0 deletions
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25
spring-boot-mvc-2/.gitignore vendored Normal file
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/target/
!.mvn/wrapper/maven-wrapper.jar
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/build/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/

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spring-boot-mvc-2/README.md Normal file
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### Relevant Articles:
- [Functional Controllers in Spring MVC]()

68
spring-boot-mvc-2/pom.xml Normal file
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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>spring-boot-mvc-2</artifactId>
<name>spring-boot-mvc-2</name>
<packaging>jar</packaging>
<description>Module For Spring Boot MVC Web Fn</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.0.BUILD-SNAPSHOT</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<mainClass>com.baeldung.springbootmvc.SpringBootMvcFnApplication</mainClass>
<layout>JAR</layout>
</configuration>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/milestone</url>
</pluginRepository>
</pluginRepositories>
</project>

74
spring-boot-mvc-2/src/main/java/com/baeldung/springbootmvc/SpringBootMvcFnApplication.java Normal file
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package com.baeldung.springbootmvc;
import static org.springframework.web.servlet.function.RouterFunctions.route;
import static org.springframework.web.servlet.function.ServerResponse.notFound;
import static org.springframework.web.servlet.function.ServerResponse.status;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpStatus;
import org.springframework.web.servlet.function.RequestPredicates;
import org.springframework.web.servlet.function.RouterFunction;
import org.springframework.web.servlet.function.ServerResponse;
import com.baeldung.springbootmvc.ctrl.ProductController;
import com.baeldung.springbootmvc.svc.ProductService;
@SpringBootApplication
public class SpringBootMvcFnApplication {
private static final Logger LOG = LoggerFactory.getLogger(SpringBootMvcFnApplication.class);
public static void main(String[] args) {
SpringApplication.run(SpringBootMvcFnApplication.class, args);
}
@Bean
RouterFunction<ServerResponse> productListing(ProductController pc, ProductService ps) {
return pc.productListing(ps);
}
@Bean
RouterFunction<ServerResponse> allApplicationRoutes(ProductController pc, ProductService ps) {
return route().add(pc.remainingProductRoutes(ps))
.before(req -> {
LOG.info("Found a route which matches " + req.uri()
.getPath());
return req;
})
.after((req, res) -> {
if (res.statusCode() == HttpStatus.OK) {
LOG.info("Finished processing request " + req.uri()
.getPath());
} else {
LOG.info("There was an error while processing request" + req.uri());
}
return res;
})
.onError(Throwable.class, (e, res) -> {
LOG.error("Fatal exception has occurred", e);
return status(HttpStatus.INTERNAL_SERVER_ERROR).build();
})
.build()
.and(route(RequestPredicates.all(), req -> notFound().build()));
}
public static class Error {
private String errorMessage;
public Error(String message) {
this.errorMessage = message;
}
public String getErrorMessage() {
return errorMessage;
}
public void setErrorMessage(String errorMessage) {
this.errorMessage = errorMessage;
}
}
}

59
spring-boot-mvc-2/src/main/java/com/baeldung/springbootmvc/ctrl/ProductController.java Normal file
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package com.baeldung.springbootmvc.ctrl;
import static org.springframework.web.servlet.function.RouterFunctions.route;
import static org.springframework.web.servlet.function.ServerResponse.ok;
import static org.springframework.web.servlet.function.ServerResponse.status;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.function.EntityResponse;
import org.springframework.web.servlet.function.RequestPredicates;
import org.springframework.web.servlet.function.RouterFunction;
import org.springframework.web.servlet.function.ServerRequest;
import org.springframework.web.servlet.function.ServerResponse;
import com.baeldung.springbootmvc.SpringBootMvcFnApplication.Error;
import com.baeldung.springbootmvc.model.Product;
import com.baeldung.springbootmvc.svc.ProductService;
@Component
public class ProductController {
public RouterFunction<ServerResponse> productListing(ProductService ps) {
return route().GET("/product", req -> ok().body(ps.findAll()))
.build();
}
public RouterFunction<ServerResponse> productSearch(ProductService ps) {
return route().nest(RequestPredicates.path("/product"), builder -> {
builder.GET("/name/{name}", req -> ok().body(ps.findByName(req.pathVariable("name"))))
.GET("/id/{id}", req -> ok().body(ps.findById(Integer.parseInt(req.pathVariable("id")))));
})
.onError(ProductService.ItemNotFoundException.class, (e, req) -> EntityResponse.fromObject(new Error(e.getMessage()))
.status(HttpStatus.NOT_FOUND)
.build())
.build();
}
public RouterFunction<ServerResponse> adminFunctions(ProductService ps) {
return route().POST("/product", req -> ok().body(ps.save(req.body(Product.class))))
.filter((req, next) -> authenticate(req) ? next.handle(req) : status(HttpStatus.UNAUTHORIZED).build())
.onError(IllegalArgumentException.class, (e, req) -> EntityResponse.fromObject(new Error(e.getMessage()))
.status(HttpStatus.BAD_REQUEST)
.build())
.build();
}
public RouterFunction<ServerResponse> remainingProductRoutes(ProductService ps) {
return route().add(productSearch(ps))
.add(adminFunctions(ps))
.build();
}
private boolean authenticate(ServerRequest req) {
return Boolean.TRUE;
}
}

72
spring-boot-mvc-2/src/main/java/com/baeldung/springbootmvc/model/Product.java Normal file
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package com.baeldung.springbootmvc.model;
public class Product {
private String name;
private double price;
private int id;
public Product(String name, double price, int id) {
super();
this.name = name;
this.price = price;
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + id;
result = prime * result + ((name == null) ? 0 : name.hashCode());
long temp;
temp = Double.doubleToLongBits(price);
result = prime * result + (int) (temp ^ (temp >>> 32));
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Product other = (Product) obj;
if (id != other.id)
return false;
if (name == null) {
if (other.name != null)
return false;
} else if (!name.equals(other.name))
return false;
if (Double.doubleToLongBits(price) != Double.doubleToLongBits(other.price))
return false;
return true;
}
}

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spring-boot-mvc-2/src/main/java/com/baeldung/springbootmvc/svc/ProductService.java Normal file
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package com.baeldung.springbootmvc.svc;
import java.util.HashSet;
import java.util.Set;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import com.baeldung.springbootmvc.model.Product;
@Service
public class ProductService {
private final Set<Product> products = new HashSet<>();
{
products.add(new Product("Book", 23.90, 1));
products.add(new Product("Pen", 44.34, 2));
}
public Product findById(int id) {
return products.stream()
.filter(obj -> obj.getId() == id)
.findFirst()
.orElseThrow(() -> new ItemNotFoundException("Product not found"));
}
public Product findByName(String name) {
return products.stream()
.filter(obj -> obj.getName()
.equalsIgnoreCase(name))
.findFirst()
.orElseThrow(() -> new ItemNotFoundException("Product not found"));
}
public Set<Product> findAll() {
return products;
}
public Product save(Product product) {
if (StringUtils.isEmpty(product.getName()) || product.getPrice() == 0.0) {
throw new IllegalArgumentException();
}
int newId = products.stream()
.mapToInt(Product::getId)
.max()
.getAsInt() + 1;
product.setId(newId);
products.add(product);
return product;
}
public static class ItemNotFoundException extends RuntimeException {
/**
*
*/
private static final long serialVersionUID = 1L;
public ItemNotFoundException(String msg) {
super(msg);
}
}
}

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spring-boot-mvc-2/src/main/resources/application.properties Normal file
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spring.main.allow-bean-definition-overriding=true

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spring-boot-mvc-2/src/main/resources/logback.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>