| /** |
| * 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.hadoop.hdfs.server.namenode.snapshot; |
| |
| import java.util.ArrayList; |
| import org.apache.hadoop.hdfs.server.namenode.FSDirectory; |
| import org.apache.hadoop.hdfs.server.namenode.INode; |
| import org.junit.*; |
| import static org.mockito.Mockito.*; |
| |
| |
| /** |
| * Testing snapshot manager functionality. |
| */ |
| public class TestSnapshotManager { |
| private static final int testMaxSnapshotLimit = 7; |
| |
| /** |
| * Test that the global limit on snapshots is honored. |
| */ |
| @Test (timeout=10000) |
| public void testSnapshotLimits() throws Exception { |
| // Setup mock objects for SnapshotManager.createSnapshot. |
| // |
| INodeDirectorySnapshottable ids = mock(INodeDirectorySnapshottable.class); |
| FSDirectory fsdir = mock(FSDirectory.class); |
| |
| SnapshotManager sm = spy(new SnapshotManager(fsdir)); |
| doReturn(ids).when(sm).getSnapshottableRoot(anyString()); |
| doReturn(testMaxSnapshotLimit).when(sm).getMaxSnapshotID(); |
| |
| // Create testMaxSnapshotLimit snapshots. These should all succeed. |
| // |
| for (Integer i = 0; i < testMaxSnapshotLimit; ++i) { |
| sm.createSnapshot("dummy", i.toString()); |
| } |
| |
| // Attempt to create one more snapshot. This should fail due to snapshot |
| // ID rollover. |
| // |
| try { |
| sm.createSnapshot("dummy", "shouldFailSnapshot"); |
| Assert.fail("Expected SnapshotException not thrown"); |
| } catch (SnapshotException se) { |
| Assert.assertTrue( |
| se.getMessage().toLowerCase().contains("rollover")); |
| } |
| |
| // Delete a snapshot to free up a slot. |
| // |
| sm.deleteSnapshot("", "", mock(INode.BlocksMapUpdateInfo.class), new ArrayList<INode>()); |
| |
| // Attempt to create a snapshot again. It should still fail due |
| // to snapshot ID rollover. |
| // |
| try { |
| sm.createSnapshot("dummy", "shouldFailSnapshot2"); |
| Assert.fail("Expected SnapshotException not thrown"); |
| } catch (SnapshotException se) { |
| Assert.assertTrue( |
| se.getMessage().toLowerCase().contains("rollover")); |
| } |
| } |
| } |