From 2c62443fe15477f75b6d2409a6b1d7eac7950732 Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Sun, 9 Apr 2023 15:17:22 +0200
Subject: [PATCH] Added a `@RestController`

---
 .../java/de/juplo/demo/DemoApplication.java   | 14 ++++++-
 .../de/juplo/demo/DemoRestController.java     | 34 ++++++++++++++++
 src/main/java/de/juplo/demo/GreetingTO.java   | 21 ++++++++++
 .../de/juplo/demo/DemoApplicationTests.java   | 39 ++++++++++++++++++-
 4 files changed, 105 insertions(+), 3 deletions(-)
 create mode 100644 src/main/java/de/juplo/demo/DemoRestController.java
 create mode 100644 src/main/java/de/juplo/demo/GreetingTO.java

diff --git a/src/main/java/de/juplo/demo/DemoApplication.java b/src/main/java/de/juplo/demo/DemoApplication.java
index 2917409..64e04c8 100644
--- a/src/main/java/de/juplo/demo/DemoApplication.java
+++ b/src/main/java/de/juplo/demo/DemoApplication.java
@@ -9,20 +9,30 @@ import org.springframework.context.annotation.Bean;
 @SpringBootApplication
 public class DemoApplication
 {
+	@Value("${application.name}")
+	String applicationName;
 	@Value("${build.version}")
 	String projectVersion;
 
 
 	@Bean
-	public BackendVersionInterceptor backendVersionInterceptor()
+	public BackendVersionInterceptor backendVersionInterceptor(
+			@Value("${build.version}") String projectVersion)
 	{
 		return new BackendVersionInterceptor(projectVersion);
 	}
 
+	@Bean
+	public String from(
+			@Value("${application.name}") String applicationName,
+			@Value("${build.version}") String projectVersion)
+	{
+		return applicationName + "@" + projectVersion;
+	}
+
 
 	public static void main(String[] args)
 	{
 		SpringApplication.run(DemoApplication.class, args);
 	}
-
 }
diff --git a/src/main/java/de/juplo/demo/DemoRestController.java b/src/main/java/de/juplo/demo/DemoRestController.java
new file mode 100644
index 0000000..4259a30
--- /dev/null
+++ b/src/main/java/de/juplo/demo/DemoRestController.java
@@ -0,0 +1,34 @@
+package de.juplo.demo;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.*;
+
+
+@RequiredArgsConstructor
+@RestController
+@Slf4j
+public class DemoRestController
+{
+  public final String PLACEHOLDER_TO = "TO_NAME";
+  public final String PLACEHOLDER_FROM = "FROM_NAME";
+
+
+  private final String from;
+
+
+  @PostMapping("{to}")
+  public GreetingTO greet(
+      @PathVariable String to,
+      @RequestBody String greeting)
+  {
+    String message = greeting
+        .replaceAll(PLACEHOLDER_FROM, from)
+        .replaceAll(PLACEHOLDER_TO, to)
+        .trim();
+
+    log.info("Greeting from {} to {}: {}", from, to, message);
+
+    return GreetingTO.of(message, from, to);
+  }
+}
diff --git a/src/main/java/de/juplo/demo/GreetingTO.java b/src/main/java/de/juplo/demo/GreetingTO.java
new file mode 100644
index 0000000..c61a30e
--- /dev/null
+++ b/src/main/java/de/juplo/demo/GreetingTO.java
@@ -0,0 +1,21 @@
+package de.juplo.demo;
+
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import static com.fasterxml.jackson.annotation.JsonInclude.Include.NON_EMPTY;
+
+
+@Data
+@AllArgsConstructor(staticName = "of")
+@JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(NON_EMPTY)
+public class GreetingTO
+{
+  private String greeting;
+  private String from;
+  private String to;
+}
diff --git a/src/test/java/de/juplo/demo/DemoApplicationTests.java b/src/test/java/de/juplo/demo/DemoApplicationTests.java
index f2981dc..576544f 100644
--- a/src/test/java/de/juplo/demo/DemoApplicationTests.java
+++ b/src/test/java/de/juplo/demo/DemoApplicationTests.java
@@ -8,11 +8,14 @@ import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.web.servlet.MockMvc;
 
 import static de.juplo.demo.BackendVersionInterceptor.BACKEND_VERSION;
+import static org.springframework.http.HttpHeaders.ACCEPT;
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.content;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
 
 
-@SpringBootTest
+@SpringBootTest(properties = { "application.name=FOO", "build.version=BAR" })
 @AutoConfigureMockMvc
 class DemoApplicationTests
 {
@@ -50,4 +53,38 @@ class DemoApplicationTests
 						.header(BACKEND_VERSION, "FOO"))
 				.andExpect(status().isGone());
 	}
+
+	@Test
+	void getGreetingIfBackendHeaderIsNotSet(@Autowired MockMvc mvc) throws Exception
+	{
+		mvc
+				.perform(post("/peter")
+						.header(ACCEPT, "application/json")
+						.header(BACKEND_VERSION, projectVersion)
+						.content("Hello TO_NAME, nice to meet you. I'm FROM_NAME."))
+				.andExpect(status().isOk())
+				.andExpect(content().json("{\"greeting\": \"Hello peter, nice to meet you. I'm FOO@BAR.\"}"));
+	}
+
+	@Test
+	void getGreetingIfBackendHeaderDoesMatch(@Autowired MockMvc mvc) throws Exception
+	{
+		mvc
+				.perform(post("/peter")
+						.header(ACCEPT, "application/json")
+						.header(BACKEND_VERSION, "FOO")
+						.content("Hello TO_NAME, nice to meet you. I'm FROM_NAME."))
+				.andExpect(status().isGone());
+	}
+
+	@Test
+	void getGreetingIfBackendHeaderDoesNotMatch(@Autowired MockMvc mvc) throws Exception
+	{
+		mvc
+				.perform(post("/peter")
+						.header(ACCEPT, "application/json")
+						.content("Hello TO_NAME, nice to meet you. I'm FROM_NAME."))
+				.andExpect(status().isOk())
+				.andExpect(content().json("{\"greeting\": \"Hello peter, nice to meet you. I'm FOO@BAR.\"}"));
+	}
 }
-- 
2.20.1