Ehcache | 易学教程

Mybait缓存机制

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MyBatis同大多数ORM框架一样，提供了一级缓存和二级缓存的支持。一级缓存：其作用域为session范围内，当session执行flush或close方法后，一级缓存会被清空。二级缓存：二级缓存和一级缓存机制相同，但是可以自定义其作用范围，如Ehcache。一级缓存在默认情况下mybatis中的一级缓存是开启的，一级缓存只在同一个SqlSession中有效不可以跨SqlSession。 @Test public void testcache(){ /** * 测试一级缓存 */ SqlSession session1 = sqlSessionFactory.openSession(); EmployeeMapper employeeMapper = session1.getMapper(EmployeeMapper.class); List<Employee> list1 = employeeMapper.findAll(null); System.out.println(list1); List<Employee> list2 = employeeMapper.findAll(null);//不发送语句 System.out.println(list2); } SqlSession调用clearCache（）清除缓存，或者在执行增删改操作后

How update/remove an item already cached within a collection of items

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问题 I am working with Spring and EhCache I have the following method @Override @Cacheable(value="products", key="#root.target.PRODUCTS") public Set<Product> findAll() { return new LinkedHashSet<>(this.productRepository.findAll()); } I have other methods working with @Cacheable and @CachePut and @CacheEvict. Now, imagine the database returns 100 products and they are cached through key="#root.target.PRODUCTS" , then other method would insert - update - deleted an item into the database. Therefore

How update/remove an item already cached within a collection of items

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Avoiding multiple repopulations of the same cache region (due to concurrency)

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问题 I have a high traffic website and I use hibernate. I also use ehcache to cache some entities and queries which are required to generate the pages. The problem is "parallel cache misses" and the long explanation is that when the application boots and the cache regions are cold each cache region is being populated many times (instead of only once) by different threads because the site is being hit by many users at the same time. In addition, when some cache region invalidates it's being

Difference / Relationship between EhCache v2 and EhCache v3

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问题 Recently I am doing some research about the performance of java local caches and, of course, I run into ehcache. As far as can see in the documentation and in the artifacts published in maven repository, it seems that there are two active development lines, version 2 and version 3. Furthermore, spring-boot include both in the super pom. So, my question is: what is it that for? Do both chase the same objectives? What functionalities include version 3? Thanks in advance! 回答1: Version 3 is, as

API前置系统开发流程：8.运用EhCache缓存，实现验证码验证

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首先选用EhCache的原因是，他的体量小，引用jar包即可使用，相比于redis来讲使用方便，不需要专门起服务。而我要实现的功能很简单，只是将生成的验证码存储于缓存，五分钟后便将缓存清理，所以对服务器内存的占用并不大。如果是大体量的缓存服务，建议使用redis等缓存技术。 1.maven引入ehcache的jar包 <dependency> <groupId>net.sf.ehcache</groupId> <artifactId>ehcache</artifactId> </dependency> 2.设置配置在resource下面新建文件夹ehcacheconfig，并在文件夹中添加ehcache-config.xml文件。 <?xml version="1.0" encoding="UTF-8"?> <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd">  <diskStore path="java.io.tmpdir/ehcache"/>  <defaultCache maxEntriesLocalHeap="10000

CacheManager No Bean Found - Not Trying to setup any Cache

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问题 I'm getting a no CacheManager bean found... But i have not tried to do anything with CacheManager! Here's my error! org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.cache.interceptor.CacheInterceptor#0': Cannot resolve reference to bean 'cacheManager' while setting bean property 'cacheManager'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'cacheManager' is defined at org

Spring 3.1 @Cacheable - method still executed

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问题 I'm trying to implement Spring 3.1 caching as explained here and here, but it doesn't seem to be working: my method is run through every time even though it is marked @cacheable. What am I doing wrong? I've moved it into a junit test case with its own configuration file to isolate it from the rest of my application, but the problem still happens. Here are the relevant files: Spring-test-servlet.xml <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001

Comparison of memcache, redis and ehcache as distributed caching framework [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . One of the decisions I need to make is what caching framework to use in my system. With so many to choose from, I am currently investigating redis, ehcache and memcached. Can anyone point to performance benchmarks of these three particular frameworks? Also an overview of their features - I am particularly

What are the Maven dependencies to use hibernate, hibernate annotations, and ehcache?

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问题 I would like to update my Maven pom.xml with the latest hibernate, hibernate-annotations, and ehcache dependencies. I read the hibernate download page and the ehcache donwload page. All my tries at interpreting it seem to fail. Can someone write out the snippet that should go into pom.xml? Cryptic hibernate download page: http://hibernate.org/downloads Cryptic ehcache download page: http://www.terracotta.org/dl/ehcache-oss-download-catalog Here is what I have so far: <properties> <hibernate