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https://issues.apache.org/jira/browse/DRILL-7590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17045421#comment-17045421
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ASF GitHub Bot commented on DRILL-7590:
---------------------------------------
arina-ielchiieva commented on pull request #1988: DRILL-7590: Refactor plugin
registry
URL: https://github.com/apache/drill/pull/1988#discussion_r383967849
##########
File path:
exec/java-exec/src/test/java/org/apache/drill/exec/store/TestSystemPluginLocator.java
##########
@@ -0,0 +1,72 @@
+/*
+ * 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;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Collection;
+
+import org.apache.drill.exec.store.sys.SystemTablePlugin;
+import org.apache.drill.exec.store.sys.SystemTablePluginConfig;
+import org.apache.drill.test.OperatorFixture;
+import org.junit.Test;
+
+public class TestSystemPluginLocator extends BasePluginRegistryTest {
+
+ // Uses a null Drillbit context. This is benign for the current
+ // set of system plugins. If this test fails, check if a system
Review comment:
Not really comfortable with a note in new code that states `if the test
fails`, since we are adding new test we should ensure such problem won't
happen. If test is unstable, maybe better not to add it?
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> Refactor plugin registry
> ------------------------
>
> Key: DRILL-7590
> URL: https://issues.apache.org/jira/browse/DRILL-7590
> Project: Apache Drill
> Issue Type: Improvement
> Affects Versions: 1.17.0
> Reporter: Paul Rogers
> Assignee: Paul Rogers
> Priority: Major
> Fix For: 1.18.0
>
>
> The plugin registry connects configurations, stored in ZK, with
> implementations, which are Java classes. The registry handles a large number
> of tasks including:
> * Populating "bootstrap" plugin configurations and handling upgrades.
> * Reading from, and writing to, the persistent store in ZK.
> * Handling "normal" (configured) plugins and special system plugins (which
> have no configuration.)
> * Handle format plugins which are always associated with the DFS storage
> plugin.
> * And so on.
> The code has grown overly complex. As we look to add a new, cleaner plugin
> mechanism, we will start by cleaning up what we have to allow the new
> mechanism to be one of many.
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