if (storeDir == null)
storeDir = serverPath + "data/tx-object-store";
else
storeDir = serverPath + storeDir;
System.out.println("transaction log will be stored in " + storeDir + "(file=" + storeImple+")");
store = new TransactionLog(storeDir, storeImple);
if (expectFailure)
{
// this test may halt the VM so make sure the transaction log is empty
// before starting the test - then the pass/fail check is simply to