Move articles from spring-core-6 module to other spring-boot modules (#13722)

* Move articles from spring-core-6 module to other spring-boot modules * JAVA-19559 Move articles from spring-core-6 module to other spring-boot-3 modules * JAVA-19559 Minor spacing change * JAVA-19559 Revert Minor spacing change
2023-03-30 21:53:07 +05:30
parent 99d11182ab
commit e310fe84da
18 changed files with 143 additions and 446 deletions
@@ -5,3 +5,4 @@
 - [Singleton Design Pattern vs Singleton Beans in Spring Boot](https://www.baeldung.com/spring-boot-singleton-vs-beans)
 - [Migrate Application From Spring Boot 2 to Spring Boot 3](https://www.baeldung.com/spring-boot-3-migration)
 - [Using Java Records with JPA](https://www.baeldung.com/spring-jpa-java-records)
+- [HTTP Interface in Spring 6](https://www.baeldung.com/spring-6-http-interface)
@@ -32,6 +32,20 @@
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-webflux</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.mock-server</groupId>
+            <artifactId>mockserver-netty</artifactId>
+            <version>${mockserver.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.mock-server</groupId>
+            <artifactId>mockserver-client-java</artifactId>
+            <version>${mockserver.version}</version>
+        </dependency>
        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
@@ -125,7 +139,7 @@
        <springdoc.version>2.0.0</springdoc.version>
        <maven-surefire-plugin.version>3.0.0-M7</maven-surefire-plugin.version>
        <start-class>com.baeldung.sample.TodoApplication</start-class>
-
+		<mockserver.version>5.14.0</mockserver.version>
    </properties>

 </project>
@@ -0,0 +1,3 @@
+package com.baeldung.httpinterface;
+
+public record Book(long id, String title, String author, int year) {}
@@ -0,0 +1,23 @@
+package com.baeldung.httpinterface;
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.reactive.function.client.WebClient;
+import org.springframework.web.reactive.function.client.support.WebClientAdapter;
+import org.springframework.web.service.invoker.HttpServiceProxyFactory;
+
+@Component
+public class BooksClient {
+
+    private final BooksService booksService;
+
+    public BooksClient(WebClient webClient) {
+        HttpServiceProxyFactory httpServiceProxyFactory =
+          HttpServiceProxyFactory.builder(WebClientAdapter.forClient(webClient))
+            .build();
+        booksService = httpServiceProxyFactory.createClient(BooksService.class);
+    }
+
+    public BooksService getBooksService() {
+        return booksService;
+    }
+}
@@ -0,0 +1,26 @@
+package com.baeldung.httpinterface;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.service.annotation.DeleteExchange;
+import org.springframework.web.service.annotation.GetExchange;
+import org.springframework.web.service.annotation.PostExchange;
+
+import java.util.List;
+
+interface BooksService {
+
+    @GetExchange("/books")
+    List<Book> getBooks();
+
+    @GetExchange("/books/{id}")
+    Book getBook(@PathVariable("id") long id);
+
+    @PostExchange("/books")
+    Book saveBook(@RequestBody Book book);
+
+    @DeleteExchange("/books/{id}")
+    ResponseEntity<Void> deleteBook(@PathVariable("id") long id);
+
+}
@@ -0,0 +1,9 @@
+package com.baeldung.httpinterface;
+
+public class MyServiceException extends RuntimeException {
+
+    MyServiceException(String msg) {
+        super(msg);
+    }
+
+}
@@ -10,3 +10,5 @@
 - [Load Spring Boot Properties From a JSON File](https://www.baeldung.com/spring-boot-json-properties)
 - [IntelliJ – Cannot Resolve Spring Boot Configuration Properties Error](https://www.baeldung.com/intellij-resolve-spring-boot-configuration-properties)
 - [Log Properties in a Spring Boot Application](https://www.baeldung.com/spring-boot-log-properties)
+- [Using Environment Variables in Spring Boot’s application.properties](https://www.baeldung.com/spring-boot-properties-env-variables)
+- More articles: [[<-- prev]](../spring-boot-properties-2)
@@ -0,0 +1,20 @@
+package com.baeldung.envvariables;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConfigurationProperties(prefix = "baeldung")
+public class BaeldungProperties {
+
+    private String presentation;
+
+    public String getPresentation() {
+        return presentation;
+    }
+
+    public void setPresentation(String presentation) {
+        this.presentation = presentation;
+    }
+
+}
@@ -0,0 +1,60 @@
+package com.baeldung.envvariables;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.env.Environment;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class MyController {
+
+    @Value("${environment.name}")
+    private String environmentName;
+
+    @Value("${java.home.and.environment}")
+    private String javaHomeAndEnvironmentName;
+
+    @Value("${thispropertydoesnotexist}")
+    private String nonExistentProperty;
+
+    @Value("${baeldung.presentation}")
+    private String baeldungPresentation;
+
+    @Autowired
+    private Environment environment;
+
+    @Autowired
+    private BaeldungProperties baeldungProperties;
+
+    @GetMapping("/environment_name")
+    String getEnvironmentName_FromEnvironmentVariables() {
+        return environmentName;
+    }
+
+    @GetMapping("/java_home_and_environment")
+    String getJavaHomeAndEnvironmentName_FromEnvironmentVariables() {
+        return javaHomeAndEnvironmentName;
+    }
+
+    @GetMapping("non_existent_property")
+    String getNonexistentProperty_FromEnvironmentVariables() {
+        return nonExistentProperty;
+    }
+
+    @GetMapping("baeldung_presentation_from_value")
+    String getBaeldungPresentation_FromValue() {
+        return baeldungPresentation;
+    }
+
+    @GetMapping("baeldung_presentation_from_environment")
+    String getBaeldungPresentation_FromEnvironment() {
+        return environment.getProperty("baeldung.presentation");
+    }
+
+    @GetMapping("baeldung_configuration_properties")
+    String getBaeldungPresentation_FromConfigurationProperties() {
+        return baeldungProperties.getPresentation();
+    }
+
+}
@@ -26,4 +26,9 @@ spring.config.activate.on-profile=multidocument-prod
 spring.datasource.password=password
 spring.datasource.url=jdbc:h2:prod
 spring.datasource.username=prodUser
-bael.property=prodValue
+bael.property=prodValue
+#---
+environment.name=${OS}
+java.home.and.environment=${JAVA_HOME}+${OS}
+not.existing.system.property=${thispropertydoesnotexist}
+baeldung.presentation=${HELLO_BAELDUNG}. Java is installed in the folder: ${JAVA_HOME}
@@ -0,0 +1,36 @@
+package com.baeldung.envvariables;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.web.servlet.MockMvc;
+
+@SpringBootTest(classes = MyController.class)
+@AutoConfigureMockMvc
+public class MyControllerIntegrationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    /** NB : these tests are commented out because they are environment dependent
+     * If you want to run one of them on your machine, follow the instruction above it
+     *
+     * expects the value of your system environment property 'OS' (it is already defined at least in Windows_NT)
+     @Test void givenExistingSystemProperty_whenInjected_thenHasSystemPropertyValue() throws Exception {
+     mockMvc.perform(get("/environment_name"))
+     .andExpect(content().string(equalTo("Windows_NT")));
+     }
+    
+      * expects the value of the JAVA_HOME environment variable (you need to define it if you haven't yet), with a + and the 'OS' environment property in the end
+     @Test void givenCombinationOfSystemPropertyAndEnvironmentVariable_whenInjected_thenHasExpectedValue() throws Exception {
+     mockMvc.perform(get("/java_home_and_environment"))
+     .andExpect(content().string(equalTo("C:\\Program Files\\Java\\jdk-11.0.14+Windows_NT")));
+     }
+    
+      * expects the content to be ${thispropertydoesnotexist} ; if you have defined an environment property called thispropertydoesnotexist, it would fail
+     @Test void givenNonExistentProperty_whenInjected_thenKeepsTheStringValue() throws Exception {
+     mockMvc.perform(get("/non_existent_property"))
+     .andExpect(content().string(equalTo("${thispropertydoesnotexist}")));
+     }
+     */
+}