#1084 - NPE When DB Migration generation run with @WhoCreated mapping

src/main/java/io/ebean/config/ServerConfig.java

@@ -12,6 +12,7 @@ import io.ebean.cache.ServerCachePlugin;
 import io.ebean.config.dbplatform.DatabasePlatform;
 import io.ebean.config.dbplatform.DbEncrypt;
 import io.ebean.config.dbplatform.DbType;
+import io.ebean.dbmigration.DbOffline;
 import io.ebean.dbmigration.MigrationRunner;
 import io.ebean.event.BeanFindController;
 import io.ebean.event.BeanPersistController;
@@ -1632,6 +1633,16 @@ public class ServerConfig {
     this.encryptor = encryptor;
   }
 
+  /**
+   * Return true if the instance is coming up in offline mode.
+   * <p>
+   * Offline mode is mostly used when generating DB migration.
+   * </p>
+   */
+  public boolean isOfflineMode() {
+    return dbOffline || DbOffline.isSet();
+  }
+
   /**
    * Return true if the EbeanServer instance should be created in offline mode.
    */

src/main/java/io/ebeaninternal/server/core/DefaultContainer.java

@@ -268,7 +268,7 @@ public class DefaultContainer implements SpiContainer {
 
   private DataSource getDataSourceFromConfig(ServerConfig config) {
 
-    if (config.isDbOffline() || DbOffline.isSet()) {
+    if (config.isOfflineMode()) {
       logger.debug("... DbOffline using platform [{}]", DbOffline.getPlatform());
       return null;
     }
@@ -334,7 +334,7 @@ public class DefaultContainer implements SpiContainer {
    */
   private boolean checkDataSource(ServerConfig serverConfig) {
 
-    if (serverConfig.isDbOffline() || DbOffline.isSet()) {
+    if (serverConfig.isOfflineMode()) {
       return false;
     }
 

src/main/java/io/ebeaninternal/server/deploy/generatedproperty/GeneratedPropertyFactory.java

@@ -45,6 +45,10 @@ public class GeneratedPropertyFactory {
     if (currentUserProvider != null) {
       generatedWhoCreated = new GeneratedWhoCreated(currentUserProvider);
       generatedWhoModified = new GeneratedWhoModified(currentUserProvider);
+    } else if (serverConfig.isOfflineMode()) {
+      currentUserProvider = new DummyCurrentUser();
+      generatedWhoCreated = new GeneratedWhoCreated(currentUserProvider);
+      generatedWhoModified = new GeneratedWhoModified(currentUserProvider);
     } else {
       generatedWhoCreated = null;
       generatedWhoModified = null;
@@ -150,4 +154,11 @@ public class GeneratedPropertyFactory {
       // do nothing
     }
   }
+
+  private static class DummyCurrentUser implements CurrentUserProvider {
+    @Override
+    public Object currentUser() {
+      throw new RuntimeException("never called");
+    }
+  }
 }