From fd5a95eac712bbbd8dcf7e4c4275c47c2421a846 Mon Sep 17 00:00:00 2001
From: "v-susanh@microsoft.com" <v-susanh@microsoft.com>
Date: Thu, 14 Sep 2023 15:42:17 -0700
Subject: [PATCH] synchronize msal calls

---
 .../sqlserver/jdbc/SQLServerMSAL4JUtils.java       | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/main/java/com/microsoft/sqlserver/jdbc/SQLServerMSAL4JUtils.java b/src/main/java/com/microsoft/sqlserver/jdbc/SQLServerMSAL4JUtils.java
index 5554fa3b1..52044cdf2 100644
--- a/src/main/java/com/microsoft/sqlserver/jdbc/SQLServerMSAL4JUtils.java
+++ b/src/main/java/com/microsoft/sqlserver/jdbc/SQLServerMSAL4JUtils.java
@@ -69,8 +69,8 @@ private SQLServerMSAL4JUtils() {
         throw new UnsupportedOperationException(SQLServerException.getErrString("R_notSupported"));
     }
 
-    static SqlAuthenticationToken getSqlFedAuthToken(SqlFedAuthInfo fedAuthInfo, String user, String password,
-            String authenticationString) throws SQLServerException {
+    static synchronized SqlAuthenticationToken getSqlFedAuthToken(SqlFedAuthInfo fedAuthInfo, String user,
+            String password, String authenticationString) throws SQLServerException {
         ExecutorService executorService = Executors.newSingleThreadExecutor();
 
         if (logger.isLoggable(Level.FINEST)) {
@@ -108,8 +108,8 @@ static SqlAuthenticationToken getSqlFedAuthToken(SqlFedAuthInfo fedAuthInfo, Str
         }
     }
 
-    static SqlAuthenticationToken getSqlFedAuthTokenPrincipal(SqlFedAuthInfo fedAuthInfo, String aadPrincipalID,
-            String aadPrincipalSecret, String authenticationString) throws SQLServerException {
+    static synchronized SqlAuthenticationToken getSqlFedAuthTokenPrincipal(SqlFedAuthInfo fedAuthInfo,
+            String aadPrincipalID, String aadPrincipalSecret, String authenticationString) throws SQLServerException {
         ExecutorService executorService = Executors.newSingleThreadExecutor();
 
         if (logger.isLoggable(Level.FINEST)) {
@@ -152,7 +152,7 @@ static SqlAuthenticationToken getSqlFedAuthTokenPrincipal(SqlFedAuthInfo fedAuth
         }
     }
 
-    static SqlAuthenticationToken getSqlFedAuthTokenPrincipalCertificate(SqlFedAuthInfo fedAuthInfo,
+    static synchronized SqlAuthenticationToken getSqlFedAuthTokenPrincipalCertificate(SqlFedAuthInfo fedAuthInfo,
             String aadPrincipalID, String certFile, String certPassword, String certKey, String certKeyPassword,
             String authenticationString) throws SQLServerException {
         ExecutorService executorService = Executors.newSingleThreadExecutor();
@@ -253,7 +253,7 @@ static SqlAuthenticationToken getSqlFedAuthTokenPrincipalCertificate(SqlFedAuthI
         }
     }
 
-    static SqlAuthenticationToken getSqlFedAuthTokenIntegrated(SqlFedAuthInfo fedAuthInfo,
+    static synchronized SqlAuthenticationToken getSqlFedAuthTokenIntegrated(SqlFedAuthInfo fedAuthInfo,
             String authenticationString) throws SQLServerException {
         ExecutorService executorService = Executors.newSingleThreadExecutor();
 
@@ -300,7 +300,7 @@ static SqlAuthenticationToken getSqlFedAuthTokenIntegrated(SqlFedAuthInfo fedAut
         }
     }
 
-    static SqlAuthenticationToken getSqlFedAuthTokenInteractive(SqlFedAuthInfo fedAuthInfo, String user,
+    static synchronized SqlAuthenticationToken getSqlFedAuthTokenInteractive(SqlFedAuthInfo fedAuthInfo, String user,
             String authenticationString) throws SQLServerException {
         ExecutorService executorService = Executors.newSingleThreadExecutor();