spring-boot-starter-cache

whatsmars-spring-boot-samples/pom.xml

@@ -17,6 +17,7 @@
         <module>whatsmars-boot-sample-aop</module>
         <module>whatsmars-boot-sample-session</module>
         <module>whatsmars-boot-sample-logback</module>
+        <module>whatsmars-boot-sample-cache</module>
     </modules>
 
     <!--<properties>

whatsmars-spring-boot-samples/whatsmars-boot-sample-cache/pom.xml

+<?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">
+    <parent>
+        <artifactId>whatsmars-spring-boot-samples</artifactId>
+        <groupId>org.hongxi</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>whatsmars-boot-sample-cache</artifactId>
+    <name>${project.artifactId}</name>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-cache</artifactId>
+        </dependency>
+    </dependencies>
+
+
+</project>
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whatsmars-spring-boot-samples/whatsmars-boot-sample-cache/src/main/java/org/hongxi/whatsmars/boot/cache/AppRunner.java

+package org.hongxi.whatsmars.boot.cache;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.stereotype.Component;
+
+@Component
+public class AppRunner implements CommandLineRunner {
+
+    private static final Logger logger = LoggerFactory.getLogger(AppRunner.class);
+
+    private final BookRepository bookRepository;
+
+    public AppRunner(BookRepository bookRepository) {
+        this.bookRepository = bookRepository;
+    }
+
+    @Override
+    public void run(String... args) throws Exception {
+        logger.info(".... Fetching books");
+        logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
+        logger.info("isbn-4567 -->" + bookRepository.getByIsbn("isbn-4567"));
+        logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
+        logger.info("isbn-4567 -->" + bookRepository.getByIsbn("isbn-4567"));
+        logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
+        logger.info("isbn-1234 -->" + bookRepository.getByIsbn("isbn-1234"));
+    }
+
+}
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whatsmars-spring-boot-samples/whatsmars-boot-sample-cache/src/main/java/org/hongxi/whatsmars/boot/cache/Application.java

+package org.hongxi.whatsmars.boot.cache;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cache.annotation.EnableCaching;
+
+/**
+ * Created by shenhongxi on 2018/1/22.
+ */
+@EnableCaching
+@SpringBootApplication
+public class Application {
+    public static void main(String[] args) {
+        SpringApplication.run(Application.class, args);
+    }
+}

whatsmars-spring-boot-samples/whatsmars-boot-sample-cache/src/main/java/org/hongxi/whatsmars/boot/cache/Book.java

+package org.hongxi.whatsmars.boot.cache;
+
+public class Book {
+
+    private String isbn;
+    private String title;
+
+    public Book(String isbn, String title) {
+        this.isbn = isbn;
+        this.title = title;
+    }
+
+    public String getIsbn() {
+        return isbn;
+    }
+
+    public void setIsbn(String isbn) {
+        this.isbn = isbn;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    @Override
+    public String toString() {
+        return "Book{" + "isbn='" + isbn + '\'' + ", title='" + title + '\'' + '}';
+    }
+
+}
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whatsmars-spring-boot-samples/whatsmars-boot-sample-cache/src/main/java/org/hongxi/whatsmars/boot/cache/BookRepository.java

+package org.hongxi.whatsmars.boot.cache;
+
+public interface BookRepository {
+
+    Book getByIsbn(String isbn);
+
+}
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whatsmars-spring-boot-samples/whatsmars-boot-sample-cache/src/main/java/org/hongxi/whatsmars/boot/cache/SimpleBookRepository.java

+package org.hongxi.whatsmars.boot.cache;
+
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Component;
+
+@Component
+public class SimpleBookRepository implements BookRepository {
+
+    @Override
+    @Cacheable("books")
+    public Book getByIsbn(String isbn) {
+        simulateSlowService();
+        return new Book(isbn, "Some book");
+    }
+
+    // Don't do this at home
+    private void simulateSlowService() {
+        try {
+            long time = 3000L;
+            Thread.sleep(time);
+        } catch (InterruptedException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+}
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