| /** |
| * 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.hbase.io.asyncfs; |
| |
| import static org.hamcrest.CoreMatchers.instanceOf; |
| import static org.hamcrest.MatcherAssert.assertThat; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.fail; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.testclassification.MediumTests; |
| import org.apache.hadoop.hbase.testclassification.MiscTests; |
| import org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException; |
| import org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException; |
| import org.apache.hadoop.ipc.RemoteException; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.ClassRule; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.junit.rules.TestName; |
| |
| /** |
| * Used to confirm that it is OK to overwrite a file which is being written currently. |
| */ |
| @Category({ MiscTests.class, MediumTests.class }) |
| public class TestOverwriteFileUnderConstruction extends AsyncFSTestBase { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestOverwriteFileUnderConstruction.class); |
| |
| private static FileSystem FS; |
| |
| @Rule |
| public final TestName name = new TestName(); |
| |
| @BeforeClass |
| public static void setUp() throws Exception { |
| startMiniDFSCluster(3); |
| FS = CLUSTER.getFileSystem(); |
| } |
| |
| @AfterClass |
| public static void tearDown() throws Exception { |
| shutdownMiniDFSCluster(); |
| } |
| |
| @Test |
| public void testNotOverwrite() throws IOException { |
| Path file = new Path("/" + name.getMethodName()); |
| try (FSDataOutputStream out1 = FS.create(file)) { |
| try { |
| FS.create(file, false); |
| fail("Should fail as there is a file with the same name which is being written"); |
| } catch (RemoteException e) { |
| // expected |
| assertThat(e.unwrapRemoteException(), instanceOf(AlreadyBeingCreatedException.class)); |
| } |
| } |
| } |
| |
| @Test |
| public void testOverwrite() throws IOException { |
| Path file = new Path("/" + name.getMethodName()); |
| FSDataOutputStream out1 = FS.create(file); |
| FSDataOutputStream out2 = FS.create(file, true); |
| out1.write(2); |
| out2.write(1); |
| try { |
| out1.close(); |
| // a successful close is also OK for us so no assertion here, we just need to confirm that the |
| // data in the file are correct. |
| } catch (FileNotFoundException fnfe) { |
| // hadoop3 throws one of these. |
| } catch (RemoteException e) { |
| // expected |
| assertThat(e.unwrapRemoteException(), instanceOf(LeaseExpiredException.class)); |
| } |
| out2.close(); |
| try (FSDataInputStream in = FS.open(file)) { |
| assertEquals(1, in.read()); |
| assertEquals(-1, in.read()); |
| } |
| } |
| } |