From 8ed0e171cc075b5b1218f7269fe1b00077c7ff7f Mon Sep 17 00:00:00 2001
From: Jim Martens <github@2martens.de>
Date: Wed, 31 May 2017 15:29:59 +0200
Subject: [PATCH] Prevented edge case of committing before logging

Signed-off-by: Jim Martens <github@2martens.de>
---
 04/src/PersistenceManager.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/04/src/PersistenceManager.java b/04/src/PersistenceManager.java
index f3aaa27..012b684 100644
--- a/04/src/PersistenceManager.java
+++ b/04/src/PersistenceManager.java
@@ -53,8 +53,8 @@ public class PersistenceManager {
      * @return transaction ID
      */
     synchronized int beginTransaction() {
-        _transactions.put(_nextTransactionNumber, false);
         log(_nextTransactionNumber, -1, "BOT", "");
+        _transactions.put(_nextTransactionNumber, false);
         // return the next transaction number and increase it by one afterwards
         return _nextTransactionNumber++;
     }
@@ -71,8 +71,8 @@ public class PersistenceManager {
         }
         // only perform commit actions if transaction isn't commited yet
         if (!_transactions.get(taid)) {
-            _transactions.replace(taid, true);
             log(taid, -1, "COMMIT", "");
+            _transactions.replace(taid, true);
         }
     }