java - 将 ehCache 3 ehcache.xml 放在 Springboot 2 (Spring 5 ) 项目的 jar 文件之外

Question

花了很长时间弄清楚如何在 Spring 5 (Springboot 2.x) 项目的 jar 文件之外外部化 ehCache 3 ehcache.xml。这很重要，这样可以调整 ehcache 设置而无需重新部署项目。

Answer 1

只是分享一个使用 Java 8 的解决方案，以防其他人面临这个挑战：

package com.myproject.config;
import java.net.URISyntaxException;
import java.nio.file.Paths;
import javax.cache.Caching;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.jcache.JCacheCacheManager;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * Configures ehCache.
 * 
 * @author 
 *
 */
@Configuration
@EnableCaching
public class CacheConfiguration {
    private static final Logger LOGGER = LoggerFactory.getLogger(CacheConfiguration.class);
    @Value("${myproject.cache.ehcache.xml.fullpath:/dir/outside/of/project/config/ehcache.xml}")
    private String ehcacheXmlFullPath;

    @Bean
    public CacheManager cacheManager() throws URISyntaxException {
        // To get from the classpath: getClass().getResource("/ehcache.xml").toURI()
        return new JCacheCacheManager(Caching.getCachingProvider().getCacheManager(Paths.get(ehcacheXmlFullPath).toUri(),
                getClass().getClassLoader()));
    }
}