org.apache.hadoop.io.nativeio.TestSharedFileDescriptorFactory.java Source code

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Here is the source code for org.apache.hadoop.io.nativeio.TestSharedFileDescriptorFactory.java

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/**
 * 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.io.nativeio;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import org.junit.Assert;
import org.junit.Assume;
import org.junit.Before;
import org.junit.Test;
import org.apache.commons.lang.SystemUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.test.GenericTestUtils;

public class TestSharedFileDescriptorFactory {
    static final Log LOG = LogFactory.getLog(TestSharedFileDescriptorFactory.class);

    private static final File TEST_BASE = GenericTestUtils.getTestDir();

    @Before
    public void setup() throws Exception {
        Assume.assumeTrue(null == SharedFileDescriptorFactory.getLoadingFailureReason());
    }

    @Test(timeout = 10000)
    public void testReadAndWrite() throws Exception {
        File path = new File(TEST_BASE, "testReadAndWrite");
        path.mkdirs();
        SharedFileDescriptorFactory factory = SharedFileDescriptorFactory.create("woot_",
                new String[] { path.getAbsolutePath() });
        FileInputStream inStream = factory.createDescriptor("testReadAndWrite", 4096);
        FileOutputStream outStream = new FileOutputStream(inStream.getFD());
        outStream.write(101);
        inStream.getChannel().position(0);
        Assert.assertEquals(101, inStream.read());
        inStream.close();
        outStream.close();
        FileUtil.fullyDelete(path);
    }

    static private void createTempFile(String path) throws Exception {
        FileOutputStream fos = new FileOutputStream(path);
        fos.write(101);
        fos.close();
    }

    @Test(timeout = 10000)
    public void testCleanupRemainders() throws Exception {
        Assume.assumeTrue(NativeIO.isAvailable());
        Assume.assumeTrue(SystemUtils.IS_OS_UNIX);
        File path = new File(TEST_BASE, "testCleanupRemainders");
        path.mkdirs();
        String remainder1 = path.getAbsolutePath() + Path.SEPARATOR + "woot2_remainder1";
        String remainder2 = path.getAbsolutePath() + Path.SEPARATOR + "woot2_remainder2";
        createTempFile(remainder1);
        createTempFile(remainder2);
        SharedFileDescriptorFactory.create("woot2_", new String[] { path.getAbsolutePath() });
        // creating the SharedFileDescriptorFactory should have removed 
        // the remainders
        Assert.assertFalse(new File(remainder1).exists());
        Assert.assertFalse(new File(remainder2).exists());
        FileUtil.fullyDelete(path);
    }

    @Test(timeout = 60000)
    public void testDirectoryFallbacks() throws Exception {
        File nonExistentPath = new File(TEST_BASE, "nonexistent");
        File permissionDeniedPath = new File("/");
        File goodPath = new File(TEST_BASE, "testDirectoryFallbacks");
        goodPath.mkdirs();
        try {
            SharedFileDescriptorFactory.create("shm_",
                    new String[] { nonExistentPath.getAbsolutePath(), permissionDeniedPath.getAbsolutePath() });
            Assert.fail();
        } catch (IOException e) {
        }
        SharedFileDescriptorFactory factory = SharedFileDescriptorFactory.create("shm_",
                new String[] { nonExistentPath.getAbsolutePath(), permissionDeniedPath.getAbsolutePath(),
                        goodPath.getAbsolutePath() });
        Assert.assertEquals(goodPath.getAbsolutePath(), factory.getPath());
        FileUtil.fullyDelete(goodPath);
    }
}