JSR107 API and SPI frameworks in the Java class library application skills
JSR107 is part of the Java specification, which defines a set of API and SPI frameworks for managing cache in Java applications.Ccheca is a technology that stores data in temporary memory to accelerate data access.This article will introduce the application skills of the JSR107 API and SPI framework in the Java class library, and provide the corresponding Java code example.
The first step of using the JSR107 API in the Java library is to add corresponding dependencies.The latest version of JSR107 can be imported through Maven or Gradle.In Maven's pom.xml file, the following dependencies can be used:
<dependency>
<groupId>javax.cache</groupId>
<artifactId>cache-api</artifactId>
<version>1.1.1</version>
</dependency>
By adding this dependency item, you can use the cache API provided by JSR107 in the Java library.
The key to using the JSR107 API is to use the `javax.cache.cache` interface.The following is an example code that shows how to create, obtain, store and obtain cache objects:
import javax.cache.Cache;
import javax.cache.CacheManager;
import javax.cache.Caching;
import javax.cache.configuration.MutableConfiguration;
import javax.cache.spi.CachingProvider;
public class CacheExample {
public static void main(String[] args) {
CachingProvider cachingProvider = Caching.getCachingProvider();
CacheManager cacheManager = cachingProvider.getCacheManager();
MutableConfiguration<String, String> config = new MutableConfiguration<>();
Cache<String, String> cache = cacheManager.createCache("myCache", config);
cache.put("key1", "value1");
String value = cache.get("key1");
System.out.println (value); // Output: Value1
}
}
The above code first obtains the `CachingProvider` instance, and then obtain the` Cachemanager` instance through it.Next, we use the `MutableConfiguration` to define the configuration of the cache, and use the` CreateCache` method to create a cache.Finally, we can use the `put` method to store the key value into the cache, and use the` get` method to obtain the value in the cache.
In addition to basic cache operations, the JSR107 API also provides other functions, such as cache monitor, cache loader, and cache configuration.These functions can be further explored and used according to specific needs.
JSR107 also defines a SPI (Service Provider Interface) framework.SPI allows developers to expand the JSR107 API to achieve customization.Through SPI, we can implement our cache program, or use existing caches, such as EHCACHE or Hazelcast.
The key to using the SPI framework is to achieve the `javax.cache.spi.cachingProvider` and` javax.cache.cachemanager` interface.The specific implementation method will be different according to different cache implementation.The following is an example code, showing how to use EHCACHE as the cache provider:
import javax.cache.Cache;
import javax.cache.CacheManager;
import javax.cache.spi.CachingProvider;
import org.ehcache.jcache.JCacheCachingProvider;
public class EhcacheExample {
public static void main(String[] args) {
CachingProvider cachingProvider = new JCacheCachingProvider();
CacheManager cacheManager = cachingProvider.getCacheManager();
Cache<String, String> cache = cacheManager.getCache("myCache", String.class, String.class);
cache.put("key1", "value1");
String value = cache.get("key1");
System.out.println (value); // Output: Value1
}
}
In the above examples, we use the `jcachecachingProvider` provided by EHCACHE to get the` CacheManager`.Next, we use the `Getcache` method to obtain the existing cache.Finally, we can use the same way to store and obtain operations.
In short, the JSR107 API and SPI framework provides a powerful cache management function for the Java class library.By using the JSR107 API, we can easily manage the cache object in the Java application.Through the SPI framework, we can customize the cache provider to meet specific needs.Whether it is basic cache operation or advanced function, JSR107 provides a comprehensive solution.
