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https://issues.apache.org/jira/browse/DRILL-8155?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17527491#comment-17527491
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ASF GitHub Bot commented on DRILL-8155:
---------------------------------------
jnturton commented on code in PR #2516:
URL: https://github.com/apache/drill/pull/2516#discussion_r857621992
##########
contrib/storage-jdbc/src/main/java/org/apache/drill/exec/store/jdbc/JdbcConventionFactory.java:
##########
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.drill.exec.store.jdbc;
+
+import org.apache.calcite.sql.SqlDialect;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class JdbcConventionFactory {
+
+ private final Map<SqlDialect, DrillJdbcConvention> CACHE = new
ConcurrentHashMap<>();
Review Comment:
Thanks, I've replaced it with a Guava cache that has a maximum size of 100
before evictions LRU begin. I wonder if I should set an expiry time on it too?
> Introduce new plugin authentication modes
> -----------------------------------------
>
> Key: DRILL-8155
> URL: https://issues.apache.org/jira/browse/DRILL-8155
> Project: Apache Drill
> Issue Type: Improvement
> Components: Security
> Affects Versions: 1.20.0
> Reporter: Charles Givre
> Assignee: Charles Givre
> Priority: Major
> Fix For: Future
>
>
> At present, Drill storage plugins can use a shared set of credentials to
> access storage on behalf of Drill users or, in a subset of cases belonging to
> the broader Hadoop family, they can impersonate the Drill user when
> drill.exec.impersonation.enabled = true. An important but missing auth mode
> is [what is termed "user translation" in
> Trino|[https://docs.starburst.io/latest/security/impersonation.html].] Under
> user translation, the active Drill user is translated to a user known to the
> external storage by means of a translation table that associates Drill users
> with their credentials for the external storage. No support for user
> impersonation in the external storage is required in this mode. This ticket
> proposes that we add establish a design pattern that adds support for this
> auth mode to Drill storage plugins.
> Another present day limitation is that impersonation, for the plugins that
> support it, is toggled by a global switch. We propose here that the auth
> mode chosen for a plugin should be independent of the auth modes chosen for
> other plugins, by a move of this option into their respective storage configs.
> Finally, while a standardised means of choosing an authentication mode is
> desired, note that not every storage plugin needs to, or can, support every
> mode.
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