diff src/org/dancres/blitz/WriteEscortImpl.java @ 0:3dc0c5604566

Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/org/dancres/blitz/WriteEscortImpl.java	Sat Mar 21 11:00:06 2009 +0000
@@ -0,0 +1,53 @@
+package org.dancres.blitz;
+
+import net.jini.core.transaction.TransactionException;
+
+import org.dancres.blitz.mangler.MangledEntry;
+
+import org.dancres.blitz.entry.WriteEscort;
+import org.dancres.blitz.entry.OpInfo;
+
+import org.dancres.blitz.txn.TxnState;
+
+import org.dancres.blitz.txnlock.*;
+
+class WriteEscortImpl implements WriteEscort {
+    private TxnState theTxnState;
+    private OpInfo theInfo;
+
+    private TransactionException theException;
+
+    WriteEscortImpl(TxnState aTxnState) {
+        theTxnState = aTxnState;
+    }
+
+    public boolean writing(OpInfo anInfo) {
+        LockMgr myMgr = TxnLocks.getLockMgr(anInfo.getType());
+        TxnLock myLock = myMgr.newLock(anInfo.getOID());
+
+        synchronized(myLock) {
+            myLock.acquire(theTxnState, TxnLock.WRITE, null, null, false);
+
+            // System.out.println(theTxnState.getId() + " Wr: " + myLock);
+        }
+
+        try {
+            theTxnState.add(new EntryTxnOp(TxnLock.WRITE, anInfo, myLock));
+        } catch (TransactionException aTE) {
+            myLock.release(theTxnState, TxnLock.WRITE);
+            theException = aTE;
+            return false;
+        }
+
+        theInfo = anInfo;
+
+        return true;
+    }
+
+    OpInfo getInfo() throws TransactionException {
+        if (theException != null)
+            throw theException;
+        else
+            return theInfo;
+    }
+}