From 254ee6f47eebfc00462c10756a92066e82cc1a96 Mon Sep 17 00:00:00 2001
From: Andrew Branson <andrew@andrewbranson.net>
Date: Tue, 21 Jun 2011 15:46:02 +0200
Subject: Initial commit

---
 source/com/c2kernel/lookup/NextKeyManager.java | 72 ++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100755 source/com/c2kernel/lookup/NextKeyManager.java

(limited to 'source/com/c2kernel/lookup/NextKeyManager.java')

diff --git a/source/com/c2kernel/lookup/NextKeyManager.java b/source/com/c2kernel/lookup/NextKeyManager.java
new file mode 100755
index 0000000..04581c0
--- /dev/null
+++ b/source/com/c2kernel/lookup/NextKeyManager.java
@@ -0,0 +1,72 @@
+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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