org.apache.hadoop.yarn.client.api.impl.TestSharedCacheClientImpl.java Source code

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Here is the source code for org.apache.hadoop.yarn.client.api.impl.TestSharedCacheClientImpl.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.yarn.client.api.impl;

import static org.junit.Assert.assertEquals;
import static org.mockito.Matchers.isA;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.yarn.api.ClientSCMProtocol;
import org.apache.hadoop.yarn.api.protocolrecords.ReleaseSharedCacheResourceRequest;
import org.apache.hadoop.yarn.api.protocolrecords.UseSharedCacheResourceRequest;
import org.apache.hadoop.yarn.api.protocolrecords.UseSharedCacheResourceResponse;
import org.apache.hadoop.yarn.api.protocolrecords.impl.pb.UseSharedCacheResourceResponsePBImpl;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.junit.After;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;

public class TestSharedCacheClientImpl {

    private static final Log LOG = LogFactory.getLog(TestSharedCacheClientImpl.class);

    public static SharedCacheClientImpl client;
    public static ClientSCMProtocol cProtocol;
    private static Path TEST_ROOT_DIR;
    private static FileSystem localFs;
    private static String input = "This is a test file.";
    private static String inputChecksumSHA256 = "f29bc64a9d3732b4b9035125fdb3285f5b6455778edca72414671e0ca3b2e0de";

    @BeforeClass
    public static void beforeClass() throws IOException {
        localFs = FileSystem.getLocal(new Configuration());
        TEST_ROOT_DIR = new Path("target", TestSharedCacheClientImpl.class.getName() + "-tmpDir")
                .makeQualified(localFs.getUri(), localFs.getWorkingDirectory());
    }

    @AfterClass
    public static void afterClass() {
        try {
            if (localFs != null) {
                localFs.close();
            }
        } catch (IOException ioe) {
            LOG.info("IO exception in closing file system)");
            ioe.printStackTrace();
        }
    }

    @Before
    public void setup() {
        cProtocol = mock(ClientSCMProtocol.class);
        client = new SharedCacheClientImpl() {
            @Override
            protected ClientSCMProtocol createClientProxy() {
                return cProtocol;
            }

            @Override
            protected void stopClientProxy() {
                // do nothing because it is mocked
            }
        };
        client.init(new Configuration());
        client.start();
    }

    @After
    public void cleanup() {
        if (client != null) {
            client.stop();
            client = null;
        }
    }

    @Test
    public void testUse() throws Exception {
        Path file = new Path("viewfs://test/path");
        UseSharedCacheResourceResponse response = new UseSharedCacheResourceResponsePBImpl();
        response.setPath(file.toString());
        when(cProtocol.use(isA(UseSharedCacheResourceRequest.class))).thenReturn(response);
        Path newPath = client.use(mock(ApplicationId.class), "key");
        assertEquals(file, newPath);
    }

    @Test(expected = YarnException.class)
    public void testUseError() throws Exception {
        String message = "Mock IOExcepiton!";
        when(cProtocol.use(isA(UseSharedCacheResourceRequest.class))).thenThrow(new IOException(message));
        client.use(mock(ApplicationId.class), "key");
    }

    @Test
    public void testRelease() throws Exception {
        // Release does not care about the return value because it is empty
        when(cProtocol.release(isA(ReleaseSharedCacheResourceRequest.class))).thenReturn(null);
        client.release(mock(ApplicationId.class), "key");
    }

    @Test(expected = YarnException.class)
    public void testReleaseError() throws Exception {
        String message = "Mock IOExcepiton!";
        when(cProtocol.release(isA(ReleaseSharedCacheResourceRequest.class))).thenThrow(new IOException(message));
        client.release(mock(ApplicationId.class), "key");
    }

    @Test
    public void testChecksum() throws Exception {
        String filename = "test1.txt";
        Path file = makeFile(filename);
        assertEquals(inputChecksumSHA256, client.getFileChecksum(file));
    }

    @Test(expected = FileNotFoundException.class)
    public void testNonexistantFileChecksum() throws Exception {
        Path file = new Path(TEST_ROOT_DIR, "non-existant-file");
        client.getFileChecksum(file);
    }

    private Path makeFile(String filename) throws Exception {
        Path file = new Path(TEST_ROOT_DIR, filename);
        DataOutputStream out = null;
        try {
            out = localFs.create(file);
            out.write(input.getBytes("UTF-8"));
        } finally {
            if (out != null) {
                out.close();
            }
        }
        return file;
    }
}