我是EhCache的新手,并且实现了分布式缓存服务。我正在尝试简单的程序,但无法解决错误。我可以将数据存储到缓存中,但无法检索。EhCache:简单的程序不能正常工作
这些是我为测试写的两个简单程序。
package com.db.tests;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;
public class TestCachePut {
public TestCachePut() {
// TODO Auto-generated constructor stub
}
/**
* @param args
*/
public static void main(String[] args) {
CacheManager cache= CacheManager.create("E:/ehcache-2.6.2/ehcache.xml");
Cache caches = cache.getCache("cache1");
Element element= new Element("testKey", "inserted to cache");
caches.put(element);
System.out.println("Put in to cache");
}
}
方案2:
package com.db.tests;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;
public class TestCacheGet {
public TestCacheGet() {
// TODO Auto-generated constructor stub
}
/**
* @param args
*/
public static void main(String[] args) {
CacheManager caches = CacheManager.getInstance();
Element val = caches.getCache("cache1").get("testKey");
System.out.println(" cache content: "+val.getValue());
}
}
我已经配置像<cache name="cache1" maxEntriesLocalHeap="10000" maxEntriesLocalDisk="1000" eternal="false" diskSpoolBufferSizeMB="20" timeToIdleSeconds="3000" timeToLiveSeconds="6000" memoryStoreEvictionPolicy="LFU" transactionalMode="off"> <persistence strategy="localTempSwap"/> </cache>
陶土服务器启动的ehcache.xml中,并显示其运行。当我运行程序1时,它运行时没有任何错误。这之后,我跑了第二个,我得到了错误的NPE,
24 Dec, 2012 12:05:42 PM net.sf.ehcache.config.ConfigurationFactory parseConfiguration
WARNING: No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/E:/ehcache-2.6.2/lib/ehcache-core-2.6.2.jar!/ehcache-failsafe.xml
Exception in thread "main" java.lang.NullPointerException
at com.db.tests.TestCacheGet.main(TestCacheGet.java:22)
,如果我做的指定在两种情况下的XML配置,其发电再次NPE一个警告:
4 Dec, 2012 12:22:34 PM net.sf.ehcache.DiskStorePathManager resolveAndLockIfNeeded
WARNING: diskStorePath 'E:\Users\SKRISH~1\AppData\Local\Temp' is already used by an existing CacheManager either in the same VM or in a different process.
The diskStore path for this CacheManager will be set to E:\Users\SKRISH~1\AppData\Local\Temp\ehcache_auto_created1315701513913502723diskstore.
To avoid this warning consider using the CacheManager factory methods to create a singleton CacheManager or specifying a separate ehcache configuration (ehcache.xml) for each CacheManager instance.
我在做什么错误?请输入一些内容。
感谢
没有。它再次给我NPE。请检查编辑的问题 – Kris