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package com.c2kernel.lookup.ldap;
import com.c2kernel.common.ObjectCannotBeUpdated;
import com.c2kernel.common.ObjectNotFoundException;
import com.c2kernel.lookup.AgentPath;
import com.c2kernel.lookup.InvalidItemPathException;
import com.c2kernel.lookup.ItemPath;
import com.c2kernel.persistency.ClusterStorageException;
import com.c2kernel.persistency.NextKeyManager;
import com.c2kernel.process.Gateway;
import com.c2kernel.process.auth.Authenticator;
import com.c2kernel.utils.Logger;
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 LDAPNextKeyManager implements NextKeyManager {
protected LDAPAuthManager ldap;
protected String lastKeyPath;
public LDAPNextKeyManager() {
}
@Override
public void open(Authenticator auth) {
this.ldap = (LDAPAuthManager)auth;
LDAPProperties props = new LDAPProperties(Gateway.getProperties());
this.lastKeyPath = "cn=last,cn=entity,"+props.mLocalPath;
}
@Override
public synchronized ItemPath generateNextEntityKey()
throws ObjectCannotBeUpdated, ObjectNotFoundException
{
ItemPath lastKey = getLastEntityPath();
try {
lastKey.setSysKey(lastKey.getSysKey()+1);
} catch (InvalidItemPathException ex) {
throw new ObjectCannotBeUpdated("Invalid syskey "+(lastKey.getSysKey()+1)+". Maybe centre is full.");
}
//test that storage is empty for that key
try {
if (Gateway.getStorage().getClusterContents(lastKey.getSysKey(), "").length > 0)
throw new ObjectCannotBeUpdated("NextKeyManager: Storage already contains data for syskey "+lastKey.getSysKey()+
". Storage is out of sync with nextkey. Please contact an administrator", "");
} catch (ClusterStorageException e) {
Logger.error(e);
throw new ObjectCannotBeUpdated("Could not check storage for prior data for the next generated systemKey: "+e.getMessage());
}
//set the last key
writeLastEntityKey(lastKey.getSysKey());
return lastKey;
}
@Override
public synchronized AgentPath generateNextAgentKey()
throws ObjectCannotBeUpdated, ObjectNotFoundException {
ItemPath newEntity = generateNextEntityKey();
return new AgentPath(newEntity);
}
@Override
public void writeLastEntityKey(int sysKey) throws ObjectCannotBeUpdated, ObjectNotFoundException {
LDAPEntry lastKeyEntry = LDAPLookupUtils.getEntry(ldap.getAuthObject(),lastKeyPath);
LDAPLookupUtils.setAttributeValue(ldap.getAuthObject(), lastKeyEntry,"intsyskey",Integer.toString(sysKey));
}
@Override
public ItemPath getLastEntityPath() throws ObjectNotFoundException
{
LDAPEntry lastKeyEntry = LDAPLookupUtils.getEntry(ldap.getAuthObject(),lastKeyPath);
String lastKey = LDAPLookupUtils.getFirstAttributeValue(lastKeyEntry,"intsyskey");
try {
int sysKey = Integer.parseInt(lastKey);
ItemPath sysPath = new ItemPath(sysKey);
return sysPath;
} catch (InvalidItemPathException ex) {
throw new ObjectNotFoundException("Invalid syskey. Maybe centre is full.");
} catch (NumberFormatException ex) {
throw new ObjectNotFoundException("Invalid syskey in lastkey.");
}
}
@Override
public void close() {
ldap = null;
lastKeyPath = null;
}
}
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