pvary commented on a change in pull request #1221:
URL: https://github.com/apache/hive/pull/1221#discussion_r458607547



##########
File path: 
ql/src/java/org/apache/hadoop/hive/ql/security/authorization/plugin/metastore/HiveMetaStoreAuthorizer.java
##########
@@ -81,48 +92,261 @@ public HiveMetaStoreAuthorizer(Configuration config) {
 
   @Override
   public final void onEvent(PreEventContext preEventContext) throws 
MetaException, NoSuchObjectException, InvalidOperationException {
-    if (LOG.isDebugEnabled()) {
-      LOG.debug("==> HiveMetaStoreAuthorizer.onEvent(): EventType=" + 
preEventContext.getEventType());
+    LOG.debug("==> HiveMetaStoreAuthorizer.onEvent(): EventType=" + 
preEventContext.getEventType());
+
+    try {
+        HiveAuthorizer hiveAuthorizer = createHiveMetaStoreAuthorizer();
+        if (!skipAuthorization()) {
+          HiveMetaStoreAuthzInfo authzContext = 
buildAuthzContext(preEventContext);
+          checkPrivileges(authzContext, hiveAuthorizer);
+        }
+    } catch (Exception e) {
+      LOG.error("HiveMetaStoreAuthorizer.onEvent(): failed", e);
+      throw new MetaException(e.getMessage());
     }
 
-    HiveMetaStoreAuthzInfo authzContext = buildAuthzContext(preEventContext);
+    LOG.debug("<== HiveMetaStoreAuthorizer.onEvent(): EventType=" + 
preEventContext.getEventType());
+  }
 
-    if (!skipAuthorization(authzContext)) {
-      try {
-        HiveConf              hiveConf          = new 
HiveConf(super.getConf(), HiveConf.class);
-        HiveAuthorizerFactory authorizerFactory = 
HiveUtils.getAuthorizerFactory(hiveConf, 
HiveConf.ConfVars.HIVE_AUTHORIZATION_MANAGER);
+  @Override
+  public final List<String> filterDatabases(List<String> list) throws 
MetaException {
+    LOG.debug("HiveMetaStoreAuthorizer.filterDatabases()");
 
-        if (authorizerFactory != null) {
-          HiveMetastoreAuthenticationProvider authenticator = 
tAuthenticator.get();
+    if (list == null) {
+      return Collections.emptyList();
+    }
 
-          authenticator.setConf(hiveConf);
+    DatabaseFilterContext   databaseFilterContext    = new 
DatabaseFilterContext(list);
+    HiveMetaStoreAuthzInfo  hiveMetaStoreAuthzInfo   = 
databaseFilterContext.getAuthzContext();
+    List<String>            filteredDatabases        = 
filterDatabaseObjects(hiveMetaStoreAuthzInfo);
+    if (CollectionUtils.isEmpty(filteredDatabases)) {
+      filteredDatabases = Collections.emptyList();
+    }
 
-          HiveAuthzSessionContext.Builder authzContextBuilder = new 
HiveAuthzSessionContext.Builder();
+    LOG.debug("HiveMetaStoreAuthorizer.filterDatabases() :" + 
filteredDatabases);

Review comment:
       We might want to add some info level logging as well for supportability 
reasons, like
   LOG.info(Like "Filtered out 2 databases from 1000", or whatever...)
   
   What do you think?
   Same as for other filters




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