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/**
*
*/
package com.c2kernel.utils;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.entity.C2KLocalObject;
import com.c2kernel.entity.proxy.EntityProxyObserver;
import com.c2kernel.entity.proxy.ItemProxy;
import com.c2kernel.lifecycle.ActivityDef;
import com.c2kernel.persistency.ClusterStorage;
import com.c2kernel.persistency.ClusterStorageException;
import com.c2kernel.persistency.outcome.Viewpoint;
public class ActDefCache {
SoftCache actCache = new SoftCache();
public ActivityDef get(String actName, String actVersion) throws ObjectNotFoundException, InvalidDataException {
ActivityDef thisActDef;
synchronized(actCache) {
ActCacheEntry thisActDefEntry = ((ActCacheEntry)actCache.get(actName+"_"+actVersion));
if (thisActDefEntry == null) {
Logger.msg(6, actName+" v"+actVersion+" not found in cache. Retrieving.");
ItemProxy actDefItem = LocalObjectLoader.loadLocalObjectDef("/desc/ActivityDesc/", actName);
String actType = actDefItem.getProperty("Complexity");
Viewpoint actView = (Viewpoint)actDefItem.getObject(ClusterStorage.VIEWPOINT + "/" + actType + "ActivityDef/" + actVersion);
String marshalledAct;
try {
marshalledAct = actView.getOutcome().getData();
} catch (ClusterStorageException ex) {
Logger.error(ex);
throw new ObjectNotFoundException("Problem loading "+actName+" v"+actVersion+": "+ex.getMessage(), "");
}
try {
thisActDef = (ActivityDef)CastorXMLUtility.unmarshall(marshalledAct);
} catch (Exception ex) {
Logger.error(ex);
throw new InvalidDataException("Could not unmarshall '"+actName+"' v"+actVersion+": "+ex.getMessage(), "");
}
thisActDef.setName(actName);
thisActDef.setVersion(actVersion);
actCache.put(actName+"_"+actVersion, new ActCacheEntry(thisActDef, actDefItem, this));
}
else {
Logger.msg(6, actName+" v"+actVersion+" found in cache.");
thisActDef = thisActDefEntry.actDef;
}
}
return thisActDef;
}
public void removeAct(String id) {
synchronized(actCache) {
if (actCache.keySet().contains(id)) {
Logger.msg(7, "ActDefCache: Removing activity def "+id+" from cache");
actCache.remove(id);
}
}
}
public class ActCacheEntry implements EntityProxyObserver {
public String id;
public ItemProxy actProxy;
public ActivityDef actDef;
public ActDefCache parent;
public ActCacheEntry(ActivityDef actDef, ItemProxy actProxy, ActDefCache parent) {
this.id = actDef.getName()+"_"+actDef.getVersion();
this.actDef = actDef;
this.parent = parent;
this.actProxy = actProxy;
actProxy.subscribe(this, ClusterStorage.VIEWPOINT, false);
}
public void finalize() {
parent.removeAct(id);
actProxy.unsubscribe(this);
}
public void add(C2KLocalObject contents) {
parent.removeAct(id);
}
public void remove(String id) {
parent.removeAct(id);
}
public String toString() {
return "ActDef cache entry: "+id;
}
}
}
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