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POEhCache: Simple Program not working
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  1. POEhCache: Simple Program not working
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    copied!<p>I'm new to EhCache, and on the way to implement as a distributed cache service. I was trying out simple programs, but not able to work out the error. I'm able to store data to cache, but not able to retrieve it. </p> <p>These are two simple programs i wrote for testing.</p> <pre><code> 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"); } } </code></pre> <p>Program 2:</p> <pre><code> 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()); } } </code></pre> <p>I have the ehcache.xml configured like <code>&lt;cache name="cache1" maxEntriesLocalHeap="10000" maxEntriesLocalDisk="1000" eternal="false" diskSpoolBufferSizeMB="20" timeToIdleSeconds="3000" timeToLiveSeconds="6000" memoryStoreEvictionPolicy="LFU" transactionalMode="off"&gt; &lt;persistence strategy="localTempSwap"/&gt; &lt;/cache&gt;</code></p> <p>Teracotta server is started, and showing its running. When I run Program 1, it runs without any error. After which i ran second one , i got error as NPE,</p> <pre><code> 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) </code></pre> <p>if i do specify configuration xml in both cases , its generating again NPE with a warning : </p> <pre><code>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. </code></pre> <p>What i'm doing wrong? Some input please.</p> <p>Thanks</p>
 

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