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/**************************************************************************
* AssignItemToSlot
*
* $Workfile$
* $Revision: 1.8 $
* $Date: 2004/10/21 08:02:19 $
*
* Copyright (C) 2001 CERN - European Organization for Nuclear Research
* All rights reserved.
**************************************************************************/
package com.c2kernel.lifecycle.instance.predefined;
import java.util.Arrays;
import com.c2kernel.collection.Aggregation;
import com.c2kernel.collection.AggregationMember;
import com.c2kernel.common.InvalidDataException;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.lookup.AgentPath;
import com.c2kernel.lookup.ItemPath;
import com.c2kernel.persistency.ClusterStorage;
import com.c2kernel.persistency.ClusterStorageException;
import com.c2kernel.process.Gateway;
import com.c2kernel.utils.Logger;
/**************************************************************************
*
* @author $Author: abranson $ $Date: 2004/10/21 08:02:19 $
* @version $Revision: 1.8 $
**************************************************************************/
public class ClearSlot extends PredefinedStep
{
/**************************************************************************
* Constructor for Castor
**************************************************************************/
public ClearSlot()
{
super();
}
/**
* Params:
* 0 - collection name
* 1 - slot number
*/
@Override
protected String runActivityLogic(AgentPath agent, ItemPath item,
int transitionID, String requestData) throws InvalidDataException {
String collName;
int slotNo;
Aggregation agg;
// extract parameters
String[] params = getDataList(requestData);
if (Logger.doLog(3)) Logger.msg(3, "ClearSlot: called by "+agent+" on "+item+" with parameters "+Arrays.toString(params));
try {
collName = params[0];
slotNo = Integer.parseInt(params[1]);
} catch (Exception e) {
throw new InvalidDataException("ClearSlot: Invalid parameters "+Arrays.toString(params), "");
}
// load collection
try {
agg = (Aggregation)Gateway.getStorage().get(item, ClusterStorage.COLLECTION+"/"+collName+"/last", null);
} catch (ObjectNotFoundException ex) {
throw new InvalidDataException("ClearSlot: Collection '"+collName+"' not found in this Item", "");
} catch (ClusterStorageException ex) {
Logger.error(ex);
throw new InvalidDataException("ClearSlot: Error loading collection '"+collName+"': "+ex.getMessage(), "");
}
// find member and clear
boolean stored = false;
for (AggregationMember member : agg.getMembers().list) {
if (member.getID() == slotNo) {
if (member.getItemPath() != null)
throw new InvalidDataException("ClearSlot: Member slot "+slotNo+" already empty", "");
member.clearItem();
stored = true;
break;
}
}
if (!stored) {
throw new InvalidDataException("Member slot "+slotNo+" not found.", "");
}
try {
Gateway.getStorage().put(item, agg, null);
} catch (ClusterStorageException e) {
Logger.error(e);
throw new InvalidDataException("Error storing collection", "");
}
return requestData;
}
}
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