Ehcache

问题 I define a system.properties in my class path, then I do like this in spring configuration xml: <context:property-placeholder location="classpath*:/system.properties" ignore-resource-not-found="true" ignore-unresolvable="true" /> I aslo defind ehcache like this : <cache:annotation-driven cache-manager="cacheManager" /> <bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="classpath:/ehcache.xml" /> <property name=

问题 I have an ehcache Cache replicated across two machines. The peers correctly find each other and replicate once both peers are started. However, if the 1st peer starts first, and receives several elements, and then the 2nd peer starts later... the 2nd peer never sees the elements that were added while it was not yet alive. Here is exactly the order: Cache A is started Add "1234" to Cache A Cache B is started get "1234" from Cache B -> NOT FOUND My expectation: If 2 caches are replicated, then

问题 When using Hibernate and Ehcache as a second-level cache (2LC) implementation, is (or can) this cache used when doing COUNT operations with a WHERE clause? In SQL terms the query I'm performing is SELECT COUNT(id) FROM table WHERE someColumn > 100 . In some instances the value passed will be different each time, sometimes it will always be the same. I'm assuming this is outside of the scope of 2LC, and instead would need to be managed 'manually' (cache the result of the query, and invalidate

问题 Planning to implement cache mechanism for static data in spring web based application, can any one explain which is the best and how it works? EhCache Spring Cache 回答1: Disclaimer : I am a Terracotta / Software AG employee, the maintainers of Ehcache Ehcache is a JVM caching library, famous for being used as the default 2nd level cache for the Hibernate ORM Spring cache was introduced in Spring 3.1, and brought annotations such as @CachePut to define uses of caches in a Spring application; by

问题 I have a query like: Select * FROM table1 WHERE name LIKE 's%'; I don't want this query to fetch data from database; instead it should return data from hibernate session or something else. I think enabling second level cache will help but not sure that it will help in filtered queries. How can I force a query not to fetch data from database? 回答1: Hibernate first level cache is Session level cache, so if the object is currently in the Hibernate session results will be fetched from it. Second

问题 I am using query cache in Spring Data , Hibernate , ehcache environment. The ehcache dependency is compile 'org.hibernate:hibernate-ehcache:3.3.1.GA' The ehcache dependency tree is +--- org.hibernate:hibernate-ehcache:3.3.1.GA | +--- org.hibernate:hibernate-core:3.3.1.GA -> 3.6.6.Final (*) | +--- net.sf.ehcache:ehcache:1.2.3 | | \--- commons-collections:commons-collections:2.1 -> 3.2.1 | \--- org.slf4j:slf4j-api:1.5.2 -> 1.6.5 I have a resources/ehcache.xml with timeToLiveSeconds configured

问题 Hibernate stores entities in a dehydrated form in its 2nd level cache. This works fine for me until custom user types enter the scene, particulary Jadira's UserType library, which I use to map Joda time types. Persistence works fine out of the box, but I've discovered that Hibernate will put a "raw" (serialized) reference to a LocalDate instance into its 2nd level cache, which causes some problems, because each LocalDate instance keeps tons of references to internal datastructures, which

问题 My code is below, when I get to the end and try to print out something from the cache, the key list is empty. @Configuration @EnableCaching public class EhcacheConfiguration implements CachingConfigurer { CacheConfiguration cacheConfiguration = new CacheConfiguration(); cacheConfiguration.setName("DataCache"); cacheConfiguration.setMemoryStoreEvictionPolicy("LRU"); cacheConfiguration.setMaxEntiresLocalHeap(1000); cacheConfiguration.setEternal(false); net.sf.ehcache.config.Configuration config

问题 I'm trying to use Sping Annotation cache with EhCache. So, for first, I added the dependency to my pom.xml and configured the application-context.xml as: <ehcache:annotation-driven cache-manager="cacheManager" /> <ehcache:config cache-manager="cacheManager"> <ehcache:evict-expired-elements interval="60" /> </ehcache:config> <bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"> <property name="configLocation" value="ehcache.xml"/> </bean> This is the

问题 I am using Hibernate 3.2.5. I have a one to many relation between Department and Training tables. The second-level caching is enabled (Using EHCache) and the below entry is made in both the dept.cfg.xml and `training.hbm.xml files for caching the data. <cache usage="read-only" /> Problem Description For the first time, DB hit is done for getting both the Dept and Training records. The second time, the Department data is fetched from the cache but for getting the Training data, a DB hit is