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package com.c2kernel.utils;
import java.util.Iterator;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.entity.proxy.ItemProxy;
import com.c2kernel.lifecycle.ActivityDef;
import com.c2kernel.lifecycle.instance.stateMachine.StateMachine;
import com.c2kernel.lookup.DomainPath;
import com.c2kernel.lookup.Path;
import com.c2kernel.persistency.ClusterStorage;
import com.c2kernel.persistency.ClusterStorageException;
import com.c2kernel.persistency.outcome.Schema;
import com.c2kernel.persistency.outcome.Viewpoint;
import com.c2kernel.process.Gateway;
public class LocalObjectLoader {
private static ActDefCache actCache = new ActDefCache();
private static StateMachineCache smCache = new StateMachineCache();
static public ItemProxy loadLocalObjectDef(String root, String name)
throws ObjectNotFoundException
{
DomainPath defRoot = new DomainPath(root);
Iterator<Path> e = Gateway.getLookup().search(defRoot, name);
if (e.hasNext()) {
DomainPath defPath = (DomainPath)e.next();
if (e.hasNext()) throw new ObjectNotFoundException("Too many matches for "+name+" in "+root, "");
return Gateway.getProxyManager().getProxy(defPath);
}
else {
throw new ObjectNotFoundException("No match for "+name+" in "+root, "");
}
}
static public String getScript(String scriptName, int scriptVersion) throws ObjectNotFoundException {
Logger.msg(5, "Loading script "+scriptName+" v"+scriptVersion);
try {
ItemProxy script = loadLocalObjectDef("/desc/Script/", scriptName);
Viewpoint scriptView = (Viewpoint)script.getObject(ClusterStorage.VIEWPOINT + "/Script/" + scriptVersion);
return scriptView.getOutcome().getData();
} catch (ClusterStorageException ex) {
Logger.error(ex);
throw new ObjectNotFoundException("Error loading script " + scriptName + " version " + scriptVersion, "");
}
}
static public Schema getSchema(String schemaName, int schemaVersion) throws ObjectNotFoundException {
Logger.msg(5, "Loading schema "+schemaName+" v"+schemaVersion);
String docType = schemaName;
int docVersion = schemaVersion;
String schemaData;
// don't bother if this is the Schema schema - for bootstrap esp.
if (schemaName.equals("Schema") && schemaVersion == 0)
return new Schema(docType, docVersion, "");
ItemProxy schema = loadLocalObjectDef("/desc/OutcomeDesc/", schemaName);
Viewpoint schemaView = (Viewpoint)schema.getObject(ClusterStorage.VIEWPOINT + "/Schema/" + schemaVersion);
try {
schemaData = schemaView.getOutcome().getData();
} catch (ClusterStorageException ex) {
Logger.error(ex);
throw new ObjectNotFoundException("Problem loading schema "+schemaName+" v"+schemaVersion+": "+ex.getMessage(), "");
}
return new Schema(docType, docVersion, schemaData);
}
/**
* Retrieves a named version of activity def from the database
*
* @param actName - activity name
* @param version - named version (String)
* @return ActivityDef
* @throws ObjectNotFoundException - When activity or version does not exist
*/
static public ActivityDef getActDef(String actName, int actVersion) throws ObjectNotFoundException, InvalidDataException {
Logger.msg(5, "Loading activity def "+actName+" v"+actVersion);
return actCache.get(actName, actVersion);
}
static public StateMachine getStateMachine(String smName, int smVersion) throws ObjectNotFoundException, InvalidDataException {
Logger.msg(5, "Loading activity def "+smName+" v"+smVersion);
return smCache.get(smName, smVersion);
}
}
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