--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/dancres/blitz/txnlock/LockMgr.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,49 @@
+package org.dancres.blitz.txnlock;
+
+import org.dancres.blitz.oid.OID;
+
+/**
+   A lock mgr instance is responsible for tracking all transaction locks
+   for a particular Entry type.
+ */
+public class LockMgr {
+    /**
+       For as long as any transaction has a reference to the lock, it will
+       be maintained by the LockMgr.  Obviously, if there are no pending
+       transactions there's no need to hold the lock or it's state because
+       the lock should be clear.  If it's not clear, we have a bug!!!! :)
+     */
+    // private SoftHashMap theLocks = new SoftHashMap();
+    private LockCache theLocks = new LockCache();
+
+    public TxnLock getLock(OID aOID) {
+        return theLocks.getOrInsert(aOID);
+    }
+
+    public TxnLock newLock(OID aOID) {
+        TxnLock myLock = new TxnLock();
+
+        theLocks.put(aOID, myLock);
+
+        return myLock;
+    }
+
+    /**
+       Test to see if the specified OID has an active lock associated
+       with it.  This is only truly useful in situations where the associated
+       Entry is in an unchanging state perhaps because it has been DELETED
+       or it's lease has expired.
+     */
+    public boolean hasActiveLock(OID aOID) {
+        TxnLock myLock = (TxnLock) theLocks.get(aOID);
+        
+        if (myLock != null) {
+            synchronized(myLock) {
+                return myLock.isActive();
+            }
+        }
+        
+        return false;
+    }
+
+}