GUACAMOLE-1239: Make sure case sensitivity warnings are only displayed at startup.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/MySQLAuthenticationProviderModule.java

@@ -30,12 +30,19 @@ import org.apache.guacamole.auth.mysql.conf.MySQLDriver;
 import org.apache.guacamole.auth.mysql.conf.MySQLEnvironment;
 import org.apache.guacamole.auth.mysql.conf.MySQLSSLMode;
 import org.mybatis.guice.datasource.helper.JdbcHelper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Guice module which configures MySQL-specific injections.
  */
 public class MySQLAuthenticationProviderModule implements Module {
 
+    /**
+     * Logger for this class.
+     */
+    private static final Logger LOGGER = LoggerFactory.getLogger(MySQLAuthenticationProviderModule.class);
+    
     /**
      * MyBatis-specific configuration properties.
      */
@@ -122,6 +129,15 @@ public class MySQLAuthenticationProviderModule implements Module {
         if (serverTz != null)
             driverProperties.setProperty("serverTimezone", serverTz.getID());
         
+        // Check for case-sensitivity and warn admin
+        if (environment.getCaseSensitiveUsernames())
+            LOGGER.warn("The MySQL module is currently configured to support "
+                    + "case-sensitive username comparisons, however, the default "
+                    + "collations for MySQL databases do not support "
+                    + "case-sensitive string comparisons. If you want usernames "
+                    + "within Guacamole to be treated as case-sensitive, further "
+                    + "database configuration may be required.");
+
     }
 
     @Override

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/java/org/apache/guacamole/auth/mysql/conf/MySQLEnvironment.java

@@ -446,23 +446,12 @@ public class MySQLEnvironment extends JDBCEnvironment {
     @Override
     public boolean getCaseSensitiveUsernames() throws GuacamoleException {
         
-        // Get the configured value for the property.
+        // Return the configured value for the property, or the global value.
-        boolean caseSensitiveUsernames = getProperty(
+        return getProperty(
                 MySQLGuacamoleProperties.MYSQL_CASE_SENSITIVE_USERNAMES,
                 super.getCaseSensitiveUsernames()
         );
         
-        // If property has been set to true, warn the admin.
-        if (caseSensitiveUsernames)
-            logger.warn("You have enabled case-sensitive usernames; however, "
-                    + "MySQL's default collations do not support case-sensitive "
-                    + "string comparisons. If you really want case-sensitive "
-                    + "usernames you will need to configure your database "
-                    + "appropriately.");
-        
-        // Return the configured setting.
-        return caseSensitiveUsernames;
-        
     }
 
 }

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-sqlserver/src/main/java/org/apache/guacamole/auth/sqlserver/SQLServerAuthenticationProviderModule.java

@@ -28,12 +28,19 @@ import org.apache.guacamole.GuacamoleException;
 import org.apache.guacamole.auth.sqlserver.conf.SQLServerDriver;
 import org.apache.guacamole.auth.sqlserver.conf.SQLServerEnvironment;
 import org.mybatis.guice.datasource.helper.JdbcHelper;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Guice module which configures SQLServer-specific injections.
  */
 public class SQLServerAuthenticationProviderModule implements Module {
 
+    /**
+     * Logger for this class.
+     */
+    private static final Logger LOGGER = LoggerFactory.getLogger(SQLServerAuthenticationProviderModule.class);
+    
     /**
      * MyBatis-specific configuration properties.
      */
@@ -89,6 +96,15 @@ public class SQLServerAuthenticationProviderModule implements Module {
         // Capture which driver to use for the connection.
         this.sqlServerDriver = environment.getSQLServerDriver();
         
+        // Check for case-sensitivity and warn admin.
+        if (environment.getCaseSensitiveUsernames())
+            LOGGER.warn("The SQL Server module is currently configured to support "
+                    + "case-sensitive username comparisons, however, the default "
+                    + "collations for SQL Server databases do not support "
+                    + "case-sensitive string comparisons. If you want usernames "
+                    + "within Guacamole to be treated as case-sensitive, further "
+                    + "database configuration may be required.");
+
     }
 
     @Override

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-sqlserver/src/main/java/org/apache/guacamole/auth/sqlserver/conf/SQLServerEnvironment.java

@@ -338,15 +338,6 @@ public class SQLServerEnvironment extends JDBCEnvironment {
                 super.getCaseSensitiveUsernames()
         );
         
-        // If property has been set to true, warn the admin.
-        if (caseSensitiveUsernames)
-            logger.warn("You have configured this extension for case-sensitive "
-                        + "username comparisons, however, the default collations "
-                        + "for SQL Server databases do not support case-sensitive "
-                        + "string comparisons. Further database configuration may "
-                        + "be required in order for case-sensitive username "
-                        + "comparisons to function correctly.");
-        
         // Return as configured
         return caseSensitiveUsernames;