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package com.c2kernel.lookup;
import com.c2kernel.common.ObjectCannotBeUpdated;
import com.c2kernel.common.ObjectNotFoundException;
import com.novell.ldap.LDAPEntry;
/**************************************************************************
*
* $Revision: 1.2 $
* $Date: 2005/04/27 13:47:24 $
*
* Copyright (C) 2003 CERN - European Organization for Nuclear Research
* All rights reserved.
**************************************************************************/
// public static final String codeRevision = "$Revision: 1.2 $ $Date: 2005/04/27 13:47:24 $ $Author: abranson $";
public class NextKeyManager {
LDAPLookup ldap;
String lastKeyPath;
public NextKeyManager(LDAPLookup ldap, String lastKeyPath) {
super();
this.ldap = ldap;
this.lastKeyPath = lastKeyPath;
}
public synchronized EntityPath generateNextEntityKey()
throws ObjectCannotBeUpdated, ObjectNotFoundException
{
LDAPEntry lastKeyEntry = LDAPLookupUtils.getEntry(ldap.getConnection(),lastKeyPath);
EntityPath lastKey = getLastEntityPath();
try {
lastKey.setSysKey(lastKey.getSysKey()+1);
} catch (InvalidEntityPathException ex) {
throw new ObjectCannotBeUpdated("Invalid syskey "+(lastKey.getSysKey()+1)+". Maybe centre is full.");
}
//set the last key
writeLastEntityKey(lastKey.getSysKey());
return lastKey;
}
public synchronized AgentPath generateNextAgentKey()
throws ObjectCannotBeUpdated, ObjectNotFoundException {
EntityPath newEntity = generateNextEntityKey();
return new AgentPath(newEntity);
}
public void writeLastEntityKey(int sysKey) throws ObjectCannotBeUpdated, ObjectNotFoundException {
LDAPEntry lastKeyEntry = LDAPLookupUtils.getEntry(ldap.getConnection(),lastKeyPath);
LDAPLookupUtils.setAttributeValue(ldap.getConnection(), lastKeyEntry,"intsyskey",Integer.toString(sysKey));
}
public EntityPath getLastEntityPath() throws ObjectNotFoundException
{
LDAPEntry lastKeyEntry = LDAPLookupUtils.getEntry(ldap.getConnection(),lastKeyPath);
String lastKey = LDAPLookupUtils.getFirstAttributeValue(lastKeyEntry,"intsyskey");
try {
int sysKey = Integer.parseInt(lastKey);
EntityPath sysPath = new EntityPath(sysKey);
return sysPath;
} catch (InvalidEntityPathException ex) {
throw new ObjectNotFoundException("Invalid syskey. Maybe centre is full.");
} catch (NumberFormatException ex) {
throw new ObjectNotFoundException("Invalid syskey in lastkey.");
}
}
}
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