iBatis操纵OSCache作缓存与java.io.FileNotFoundException非常[Java编程]

这种非常只会发生在 Windows 平台上,可以说是 iBatis 的一个 Bug,大约 iBatis 的开辟测试人员都对比热衷于 Unix 族系的平台,而忽视了 Windows 下的兼容性测试.

呈现 FileNotFoundException 非常的情形是这样的:Windows7 + iBatis2.3.0.677 + OSCache2.4.1.

iBatis 中配置利用 OSCache 缓存,在映射文件 Product.xml 中有以下声明片断:

1.<cacheModel　type="OSCACHE"　id="productCache">
2.<flushOnExecute　statement="Product.insert"/>
3.<flushOnExecute　statement="Product.delete"/>
4.</cacheModel>
5.
6.<select　id="getById"　cacheModel="productCache"　parameterClass="int"　resultClass="Product">
7.select　id,　name,description　as　desc1　　from　test_product　where　id　=　#value#
8.</select>

OSCache 的 oscache.properties 中指明用磁盘文件缓存数据,注意以下几个配置:

01.#不缓存到内存
02.cache.memory=false
03.
04.#缓存长期化实现类,磁盘长期化监听器
05.cache.persistence.class=com.opensymphony.oscache.plugins.diskpersistence.DiskPersistenceListener
06.
07.#缓存磁盘途径,今后注意察看该目录生成的内容
08.cache.path=e:\\OSCache\\cache
09.
10.#挑选一种缓存算法,还可选　FIFOCache、UnlimitedCache
11.cache.algorithm=com.opensymphony.oscache.base.algorithm.LRUCache

Java 测试代码:

1.public　static　void　main(String[]　args)　throws　Exception{
2.Reader　reader　=　Resources.getResourceAsReader("SqlMapConfig.xml");
3.SqlMapClient　sqlMapClient　=　SqlMapClientBuilder.buildSqlMapClient(reader);
4.System.out.println(sqlMapClient.queryForObject("Product.getById",5));
5.
6.//背面一样的查询将不再查询数据库,而是直接利用前面履行放在缓存中的内容
7.System.out.println(sqlMapClient.queryForObject("Product.getById",5));
8.}

履行上面那段代码,你将会得到非常:

2009-8-19　10:45:52　com.opensymphony.oscache.base.algorithm.AbstractConcurrentReadCache　persistStore
严重:　[oscache]　Exception　persisting　1991729862|2162672802|5|Product.getById|62996507|　　　　　　　　　select　id,　name,description　as　desc1　　from　test_product　where　id　=　?　　　　　|executeQueryForObject
com.opensymphony.oscache.base.persistence.CachePersistenceException:　Unable　to　write　'e:\OSCache\cache\application\1991729862|2162672802|5|Product_31getById|62996507|_49_50_51_52_53_54_55_56_57select_64id,_68name,description_85as_88desc1_94_95from_100test_105product_113where_119id_122=_124_125_126_127_128_129_130|executeQueryForObject.cache'　in　the　cache.Exception:　java.io.FileNotFoundException,　Message:　e:\OSCache\cache\application\1991729862|2162672802|5|Product_31getById|62996507|_49_50_51_52_53_54_55_56_57select_64id,_68name,description_85as_88desc1_94_95from_100test_105product_113where_119id_122=_124_125_126_127_128_129_130|executeQueryForObject.cache　(文件名、目录名或卷标语法不精确.)
at　com.opensymphony.oscache.plugins.diskpersistence.AbstractDiskPersistenceListener.store(AbstractDiskPersistenceListener.java:376)
at　com.opensymphony.oscache.plugins.diskpersistence.AbstractDiskPersistenceListener.store(AbstractDiskPersistenceListener.java:238)
at　com.opensymphony.oscache.base.algorithm.AbstractConcurrentReadCache.persistStore(AbstractConcurrentReadCache.java:1113)
at　com.opensymphony.oscache.base.algorithm.AbstractConcurrentReadCache.put(AbstractConcurrentReadCache.java:1623)
at　com.opensymphony.oscache.base.algorithm.AbstractConcurrentReadCache.put(AbstractConcurrentReadCache.java:864)
at　com.opensymphony.oscache.base.Cache.putInCache(Cache.java:637)
at　com.opensymphony.oscache.base.Cache.putInCache(Cache.java:614)
at　com.opensymphony.oscache.general.GeneralCacheAdministrator.putInCache(GeneralCacheAdministrator.java:270)
at　com.ibatis.sqlmap.engine.cache.oscache.OSCacheController.putObject(OSCacheController.java:70)
at　com.ibatis.sqlmap.engine.cache.CacheModel.putObject(CacheModel.java:318)
at　com.ibatis.sqlmap.engine.mapping.statement.CachingStatement.executeQueryForObject(CachingStatement.java:80)
at　com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:566)
at　com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.queryForObject(SqlMapExecutorDelegate.java:541)
at　com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.queryForObject(SqlMapSessionImpl.java:106)
at　com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.queryForObject(SqlMapClientImpl.java:83)
at　com.unmi.TestClient.main(TestClient.java:25)

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