Spring Boot Hazelcast Caching 使用和配置详解

<?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>

  <groupId>com.zzf</groupId>
  <artifactId>spring-boot-hazelcast</artifactId>
  <version>1.0-SNAPSHOT</version>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
  </parent>

  <dependencies>

    <!-- spring boot  -->
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-cache</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <!-- hazelcast jar -->
    <dependency>
      <groupId>com.hazelcast</groupId>
      <artifactId>hazelcast-all</artifactId>
      <version>3.10.1</version>
    </dependency>
  </dependencies>

  <build>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>

@Service
@CacheConfig(cacheNames = "instruments")
public class MusicService {

  private static Logger log = LoggerFactory.getLogger(MusicService.class);
  @CacheEvict(allEntries = true)
  public void clearCache(){}

  // 表示的是属性为 trombone 就进行缓存
  @Cacheable(condition = "#instrument.equals('trombone')")
  public String play(String instrument){

    log.info("Executing: " + this.getClass().getSimpleName() + ".play(\"" + instrument + "\");");
    return "playing " + instrument + "!";
  }
}

@Configuration
public class HazelcastConfiguration {
  @Bean
  public Config hazelcastConfig(){
    return new Config().setInstanceName("hazelcast-instance")
        .addMapConfig(
              new MapConfig()
                  .setName("instruments")
                  .setMaxSizeConfig(new MaxSizeConfig(200, MaxSizeConfig.MaxSizePolicy.FREE_HEAP_SIZE))
                  .setEvictionPolicy(EvictionPolicy.LRU)
                  .setTimeToLiveSeconds(20)
        );
  }
}

<?xml version="1.0" encoding="UTF-8"?>
<hazelcast
    xsi:schemaLocation="http://www.hazelcast.com/schema/config http://www.hazelcast.com/schema/config/hazelcast-config.xsd"
    xmlns="http://www.hazelcast.com/schema/config"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">

  <map name="instruments">
    <max-size>200</max-size>
    <eviction-policy>LFU</eviction-policy>
    <time-to-live-seconds>20</time-to-live-seconds>
  </map>
</hazelcast>

# application.yml
spring:
 hazelcast:
  config: classpath:config/hazelcast.xml

# application.properties
spring.hazelcast.config=classpath:config/hazelcast.xml

@Controller
public class HazelcastController {

  private Logger logger = LoggerFactory.getLogger(HazelcastController.class);

  @Autowired
  private MusicService musicService;

  @Autowired
  private CacheManager cacheManager;

  @RequestMapping("/hezelcast")
  @ResponseBody
  public void getHazelcast(){

    logger.info("Spring Boot Hazelcast Caching Example Configuration");
    logger.info("Using cache manager: " + cacheManager.getClass().getName());

    // 清空缓存
    musicService.clearCache();

    // 调用方法
    play("trombone");
    play("guitar");

    play("trombone");
    play("guitar");

    play("bass");
    play("trombone");
  }

  private void play(String instrument){
    logger.info("Calling: " + MusicService.class.getSimpleName() + ".play(\"" + instrument + "\");");
    musicService.play(instrument);
  }
}

@EnableCaching
@SpringBootApplication
public class HazelcastApplication{

  private Logger logger = LoggerFactory.getLogger(HazelcastApplication.class);

  public static void main(String[] args) {
    SpringApplication.run(HazelcastApplication.class, args);
  }
}