/* * Copyright 2016 Damien Carol <[email protected]> * * Licensed 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 hdfs.jsr203; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.net.URI; import java.nio.channels.Channels; import java.nio.channels.FileChannel; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; import org.apache.hadoop.conf.Configuration; import org.apache.hadoop.fs.FileUtil; import org.apache.hadoop.hdfs.MiniDFSCluster; import org.junit.AfterClass; import org.junit.Assert; import org.junit.BeforeClass; import org.junit.Test; public class TestFileChannel extends TestHadoop { private static MiniDFSCluster cluster; private static URI clusterUri; @BeforeClass public static void setUpBeforeClass() throws Exception { cluster = startMini(TestFileChannel.class.getName()); clusterUri = formalizeClusterURI(cluster.getFileSystem().getUri()); } @AfterClass public static void teardownClass() throws Exception { if (cluster != null) { cluster.shutdown(); } } private static MiniDFSCluster startMini(String testName) throws IOException { File baseDir = new File("./target/hdfs/" + testName).getAbsoluteFile(); FileUtil.fullyDelete(baseDir); Configuration conf = new Configuration(); conf.set(MiniDFSCluster.HDFS_MINIDFS_BASEDIR, baseDir.getAbsolutePath()); MiniDFSCluster.Builder builder = new MiniDFSCluster.Builder(conf); MiniDFSCluster hdfsCluster = builder.clusterId(testName).build(); hdfsCluster.waitActive(); return hdfsCluster; } @Test public void open() throws IOException { Path rootPath = Paths.get(clusterUri); Path path = Files.createTempFile(rootPath, "test", "tmp"); FileChannel ch = FileChannel.open(path); InputStream input = Channels.newInputStream(ch); Assert.assertEquals(0, input.available()); ch.close(); } }