[FIX] #26 SpringBootCache

Author: heowc

SpringBootCache/build.gradle

@@ -1,29 +1,38 @@
-buildscript {
-    ext {
-        springBootVersion = '2.1.3.RELEASE'
-    }
-    repositories {
-        mavenCentral()
-    }
-    dependencies {
-        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
-    }
+plugins {
+    id 'org.springframework.boot' version '2.1.3.RELEASE'
+    id 'org.jetbrains.kotlin.jvm' version '1.2.71'
+    id 'org.jetbrains.kotlin.plugin.spring' version '1.2.71'
 }
 
-apply plugin: 'java'
-apply plugin: 'eclipse'
-apply plugin: 'org.springframework.boot'
 apply plugin: 'io.spring.dependency-management'
 
 group = 'com.example'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = 1.8
+sourceCompatibility = '1.8'
 
 repositories {
     mavenCentral()
 }
 
 dependencies {
-    compile('org.springframework.boot:spring-boot-starter-cache')
-    testCompile("org.springframework.boot:spring-boot-starter-test")
+    implementation 'org.springframework.boot:spring-boot-starter-cache'
+    implementation 'com.fasterxml.jackson.module:jackson-module-kotlin'
+    implementation 'org.jetbrains.kotlin:kotlin-reflect'
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8'
+
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+}
+
+compileKotlin {
+    kotlinOptions {
+        freeCompilerArgs = ['-Xjsr305=strict']
+        jvmTarget = '1.8'
+    }
+}
+
+compileTestKotlin {
+    kotlinOptions {
+        freeCompilerArgs = ['-Xjsr305=strict']
+        jvmTarget = '1.8'
+    }
 }

SpringBootCache/src/main/java/com/example/SpringBootCacheApplication.java renamed to SpringBootCache/src/main/java/com/example/java/SpringBootCacheApplication.java

@@ -1,4 +1,4 @@
-package com.example;
+package com.example.java;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

SpringBootCache/src/main/java/com/example/component/BookRepository.java renamed to SpringBootCache/src/main/java/com/example/java/component/BookRepository.java

@@ -1,6 +1,6 @@
-package com.example.component;
+package com.example.java.component;
 
-import com.example.domain.Book;
+import com.example.java.domain.Book;
 
 public interface BookRepository {
 

SpringBootCache/src/main/java/com/example/component/SimpleBookRepository.java renamed to SpringBootCache/src/main/java/com/example/java/component/SimpleBookRepository.java

@@ -1,6 +1,6 @@
-package com.example.component;
+package com.example.java.component;
 
-import com.example.domain.Book;
+import com.example.java.domain.Book;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.cache.annotation.CacheEvict;

SpringBootCache/src/main/java/com/example/domain/Book.java renamed to SpringBootCache/src/main/java/com/example/java/domain/Book.java

@@ -1,4 +1,4 @@
-package com.example.domain;
+package com.example.java.domain;
 
 public class Book {
 

SpringBootCache/src/main/kotlin/com/example/kotlin/SpringBootCacheApplication.kt

@@ -0,0 +1,13 @@
+package com.example.kotlin
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+import org.springframework.cache.annotation.EnableCaching
+
+@SpringBootApplication
+@EnableCaching
+class SpringBootCacheApplication
+
+fun main(args: Array<String>) {
+    runApplication<SpringBootCacheApplication>(*args)
+}

SpringBootCache/src/main/kotlin/com/example/kotlin/component/BookRepository.kt

@@ -0,0 +1,11 @@
+package com.example.kotlin.component
+
+import com.example.kotlin.domain.Book
+
+interface BookRepository {
+
+    fun getByIsbn(isbn: String): Book
+
+    fun refresh(isbn: String)
+
+}

SpringBootCache/src/main/kotlin/com/example/kotlin/component/SimpleBookRepository.kt

@@ -0,0 +1,37 @@
+package com.example.kotlin.component
+
+import com.example.kotlin.domain.Book
+import org.slf4j.LoggerFactory
+import org.springframework.cache.annotation.CacheEvict
+import org.springframework.cache.annotation.Cacheable
+import org.springframework.stereotype.Component
+
+@Component
+class SimpleBookRepository : BookRepository {
+
+    companion object {
+        private val logger = LoggerFactory.getLogger(SimpleBookRepository::class.java)
+        private const val CACHE_BOOK = "book"
+    }
+
+    @Cacheable(value = [CACHE_BOOK], key = "#isbn")
+    override fun getByIsbn(isbn: String): Book {
+        simulateSlowService()
+        return Book(isbn, "Some book")
+    }
+
+    private fun simulateSlowService() {
+        try {
+            Thread.sleep(3000L)
+        } catch (e: InterruptedException) {
+            throw IllegalStateException(e)
+        }
+
+    }
+
+    @CacheEvict(value = [CACHE_BOOK], key = "#isbn")
+    override fun refresh(isbn: String) {
+        logger.info("cache clear => $isbn")
+    }
+}
+

SpringBootCache/src/main/kotlin/com/example/kotlin/domain/Book.kt

@@ -0,0 +1,5 @@
+package com.example.kotlin.domain
+
+data class Book(val isbn: String, val title: String) {
+    constructor() : this("", "")
+}

SpringBootCache/src/test/java/com/example/SpringBootCacheApplicationTests.java renamed to SpringBootCache/src/test/java/com/example/java/SpringBootCacheApplicationTests.java

@@ -1,6 +1,6 @@
-package com.example;
+package com.example.java;
 
-import com.example.component.BookRepository;
+import com.example.java.component.BookRepository;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -12,14 +12,13 @@
 import org.springframework.test.context.junit4.SpringRunner;
 
 @RunWith(SpringRunner.class)
-@SpringBootTest
+@SpringBootTest(classes = SpringBootCacheApplication.class)
 public class SpringBootCacheApplicationTests {
 
 	@Autowired
 	private BookRepository repository;
 
 	private long startTime;
-	private long endTime;
 
 	private static final Logger logger = LoggerFactory.getLogger(SpringBootCacheApplicationTests.class);
 
@@ -30,8 +29,7 @@ public void onBefore() {
 
 	@After
 	public void onAfter() {
-		endTime = System.currentTimeMillis();
-		logger.info("소요시간: {}ms", endTime - startTime);
+		logger.info("소요시간: {}ms", System.currentTimeMillis() - startTime);
 	}
 
 	@Test