From 40fbb3d31e015b63dcb01eb0d66a6365e9de1e68 Mon Sep 17 00:00:00 2001
From: Steve Ebersole <steve@hibernate.org>
Date: Fri, 2 Nov 2007 16:18:14 +0000
Subject: [PATCH] HHH-2928 : synchronize enhanced id gen optimizers

git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@14183 1b8cb986-b30d-0410-93ca-fae66ebed9b2
---
 .../main/java/org/hibernate/id/enhanced/OptimizerFactory.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/core/src/main/java/org/hibernate/id/enhanced/OptimizerFactory.java b/core/src/main/java/org/hibernate/id/enhanced/OptimizerFactory.java
index 9ee126b915..018ac36056 100644
--- a/core/src/main/java/org/hibernate/id/enhanced/OptimizerFactory.java
+++ b/core/src/main/java/org/hibernate/id/enhanced/OptimizerFactory.java
@@ -120,7 +120,7 @@ public class OptimizerFactory {
 			}
 		}
 
-		public Serializable generate(AccessCallback callback) {
+		public synchronized Serializable generate(AccessCallback callback) {
 			if ( lastSourceValue < 0 ) {
 				lastSourceValue = callback.getNextValue();
 				while ( lastSourceValue <= 0 ) {
@@ -168,7 +168,7 @@ public class OptimizerFactory {
 			}
 		}
 
-		public Serializable generate(AccessCallback callback) {
+		public synchronized Serializable generate(AccessCallback callback) {
 			if ( hiValue < 0 ) {
 				value = callback.getNextValue();
 				if ( value < 1 ) {