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[英]Second Level Cache never hits using, spring3, hibernate4, ehcache?
[英]Spring+Hibernate+Ehcache make query_cache never expire
我正在嘗試在Spring(3.2)+ Hibernate(4.2)應用程序中使query_cache永不過期
我嘗試了以下配置,緩存仍在工作,但120秒后,即使將timeToIdleSeconds和timeToLiveSeconds設置為大於120的值,我的可緩存查詢也命中了數據庫
<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
updateCheck="false">
<defaultCache
maxElementsInMemory="10000"
eternal="false"
timeToIdleSeconds="1800"
timeToLiveSeconds="3600"
overflowToDisk="true"
maxElementsOnDisk="10000000"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="1800" />
<cache name="org.hibernate.cache.StandardQueryCache"
maxEntriesLocalHeap="25"
eternal="false"
timeToIdleSeconds="1800"
timeToLiveSeconds="3600">
<persistence strategy="localTempSwap"/>
</cache>
<cache name="org.hibernate.cache.UpdateTimestampsCache"
maxEntriesLocalHeap="5000"
timeToIdleSeconds="1800"
timeToLiveSeconds="3600"
eternal="false">
<persistence strategy="localTempSwap" />
</cache>
</ehcache>
我包括使用以下內容的Ehcache:
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache-core</artifactId>
<version>2.6.6</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-ehcache</artifactId>
<version>4.2.6.Final</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.1</version>
</dependency>
注意:我已經嘗試使用過: timeToIdleSeconds =“ 0”和timeToLiveSeconds =“ 0”,但是沒有運氣,我得到了相同的行為,120秒並且清除了緩存。 這是完整的日志:
21:52:11,128 DEBUG StandardQueryCache:131 - Checking cached query results in region: org.hibernate.cache.internal.StandardQueryCache
21:52:11,129 DEBUG EhcacheGeneralDataRegion:69 - key: sql: select this_.townID as townID1_33_1_, this_.name as name2_33_1_, this_.zip_code as code_pos3_33_1_, this_.regionID as regionID4_33_1_, region2_.regionId as regionId1_27_0_, region2_.name as name2_27_0_ from town this_ left outer join region region2_ on this_.regionID=region2_.regionId; parameters: ; transformer: org.hibernate.transform.CacheableResultTransformer@13a525
21:52:11,129 DEBUG EhcacheGeneralDataRegion:76 - Element for key sql: select this_.townID as townID1_33_1_, this_.name as name2_33_1_, this_.zip_code as code_pos3_33_1_, this_.regionID as regionID4_33_1_, region2_.regionId as regionId1_27_0_, region2_.name as name2_27_0_ from town this_ left outer join region region2_ on this_.regionID=region2_.regionId; parameters: ; transformer: org.hibernate.transform.CacheableResultTransformer@13a525 is null
21:52:11,129 DEBUG StandardQueryCache:137 - Query results were not found in cache
Hibernate: select this_.townID as townID1_33_1_, this_.name as name2_33_1_, this_.zip_code as code_pos3_33_1_, this_.regionID as regionID4_33_1_, region2_.regionId as regionId1_27_0_, region2_.name as name2_27_0_ from town this_ left outer join region region2_ on this_.regionID=region2_.regionId
21:52:11,137 DEBUG StandardQueryCache:104 - Caching query results in region: org.hibernate.cache.internal.StandardQueryCache; timestamp=5657678361137154
21:52:11,138 DEBUG EhcacheGeneralDataRegion:100 - key: sql: select this_.townID as townID1_33_1_, this_.name as name2_33_1_, this_.zip_code as code_pos3_33_1_, this_.regionID as regionID4_33_1_, region2_.regionId as regionId1_27_0_, region2_.name as name2_27_0_ from town this_ left outer join region region2_ on this_.regionID=region2_.regionId; parameters: ; transformer: org.hibernate.transform.CacheableResultTransformer@13a525 value: [5657678361137154, 1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
我使用以下命令激活了第二級緩存和query_cache:
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
<prop key="hibernate.cache.provider_configuration_file_resource_path">/ehcache.xml</prop>
編輯:
我的查詢是使用Criteria API生成的:
public List<Town> readAll() {
Criteria crit = getCurrentSession().createCriteria(Town.class);
crit.setCacheable(true);
return crit.list();
}
我使用讀寫作為CacheConcurrencyStrategy。 所以我我的實體小鎮我有這個:
<cache usage="read-write" />
編輯:啟動應用程序時,我剛剛看到了這一點:
22:10:45,570 WARN ConfigurationFactory:136 - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: file:/C:/Program%20Files/Apache%20Software%20Foundation/Tomcat%207.0/work/Catalina/localhost/projet/loader/ehcache-failsafe.xml
22:00:49,812 INFO UpdateTimestampsCache:61 - HHH000250: Starting update timestamps cache at region: org.hibernate.cache.spi.UpdateTimestampsCache
22:00:49,818 WARN AbstractEhcacheRegionFactory:180 - HHH020003: Could not find a specific ehcache configuration for cache named [org.hibernate.cache.spi.UpdateTimestampsCache]; using defaults.
我認為我在WEB-INF / ehcache.xml中所做的配置不被認為是什么問題? 這是錯誤的地方嗎?
主要問題是AbstractEhcacheRegionFactory找不到ehcache.xml ,因此我遵循以下步驟:
1)我刪除了:
<prop key="hibernate.cache.provider_configuration_file_resource_path">/ehcache.xml</prop>
並將ehcache.xml放在src / main / java中 ,這是我在文檔中找到的默認位置
2)我替換了這個:
org.hibernate.cache.StandardQueryCache
通過
org.hibernate.cache.internal.StandardQueryCache
和這個
org.hibernate.cache.UpdateTimestampsCache
通過
org.hibernate.cache.spi.UpdateTimestampsCache
3)I設置UpdateTimestampsCache的timeToIdleSeconds和timeToLiveSeconds至0
我按照您的建議做了,但是我不想在源目錄中移動ehcache.xml,所以我改用了以下方法:
<prop key="hibernate.cache.provider_configuration_file_resource_path">classpath:ehcache.xml</prop>
而且效果很好。 (ehcache.xml在resources目錄中)
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