Hi!
I am trying to use the Object Caching Service of Oracle (OCS4J) to cache objects. I was able to create a loader which extends the CacheLoader and a class which accesses the object cache. My problem is when I call this class in my serlvet, I get the error java.lang.NoClassDefFound:oracle.ias.CacheException

I would really appreciate help on this matter since there are not so many articles/source about this OCS4J API.Following are my codes. thanks, Cathy

My CacheLoader object is

package no.ssb.util.cache;

import oracle.ias.cache.*;

public class ObjectCacheLoader extends CacheLoader {

public ObjectCacheLoader() {

}

public Object load(Object handle, Object args) {

String testcontents=null;

try{

testcontents = expensiveCall(args);

}catch (Exception ex) {}

return new String(testcontents);

}

private String expensiveCall(Object args){

String str=null;

str="testdata";

return str;

}

}

The class which accesses the cached object

package no.ssb.util.cache;

import oracle.ias.cache.*;

import no.ssb.util.cache.ObjectCacheLoader;

import no.ssb.util.log.ServerLog;

public class ObjectCacheMgr {

public static final String APP_NAME = "SCHEMADEF";

public static String getCacheObj() {

String obj=null;

ObjectCacheLoader objLoader= new ObjectCacheLoader();

CacheAccess caccess=null;

Attributes attr = new Attributes();

try{

attr.setLoader(objLoader);

attr.setIdleTime(120);

CacheAccess.defineRegion

caccess=CacheAccess.getAccess(APP_NAME); //request for access to a cache region

caccess.defineObject("TestObject",attr);

//object is loaded using the loader ObjectCacheLoader, defined on the region,

//if the object is not yet in the cache

obj = (String) caccess.get("TestObject");

}catch (CacheException ex ){

ServerLog.putErr("Caching error", ex.toString(),"");

}finally {

if (caccess!=null)

caccess.close();

}

return obj;

}

}