com.splout.db.dnode.TestFetcher.java Source code

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Here is the source code for com.splout.db.dnode.TestFetcher.java

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package com.splout.db.dnode;

/*
 * #%L
 * Splout SQL Server
 * %%
 * Copyright (C) 2012 Datasalt Systems S.L.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import com.google.common.io.Files;
import com.splout.db.common.SploutConfiguration;
import com.splout.db.dnode.Fetcher.Throttler;
import org.apache.commons.io.FileUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URISyntaxException;
import java.nio.charset.Charset;

import static org.junit.Assert.*;

public class TestFetcher {

    @Test
    public void testThrottling() throws InterruptedException {
        double bytesPerSec = 1000;
        Throttler throttler = new Throttler(bytesPerSec);
        long startTime = System.currentTimeMillis();

        int bytesConsumed = 0;

        for (int i = 0; i < 10; i++) {
            int bytes = (int) (Math.random() * 1000);
            bytesConsumed += bytes;
            throttler.incrementAndThrottle(bytes);
        }

        long endTime = System.currentTimeMillis();
        double secs = (endTime - startTime) / (double) 1000;
        double avgBytesPerSec = bytesConsumed / secs;

        assertEquals(bytesPerSec, avgBytesPerSec, 5.0); // + - 5
    }

    @Test
    public void testHdfsFetching() throws IOException, URISyntaxException, InterruptedException {
        Configuration conf = new Configuration();
        FileSystem fS = FileSystem.getLocal(conf);

        SploutConfiguration testConfig = SploutConfiguration.getTestConfig();
        testConfig.setProperty(FetcherProperties.TEMP_DIR, "tmp-dir-" + TestFetcher.class.getName());
        Fetcher fetcher = new Fetcher(testConfig);

        Path path = new Path("tmp-" + TestFetcher.class.getName());
        OutputStream oS = fS.create(path);
        oS.write("This is what happens when you don't know what to write".getBytes());
        oS.close();

        File f = fetcher.fetch(new Path(fS.getWorkingDirectory(), path.getName()).toUri().toString());

        assertTrue(f.exists());
        assertTrue(f.isDirectory());

        File file = new File(f, "tmp-" + TestFetcher.class.getName());
        assertTrue(file.exists());

        assertEquals("This is what happens when you don't know what to write",
                Files.toString(file, Charset.defaultCharset()));

        fS.delete(path, true);
        FileUtils.deleteDirectory(f);
    }

    @Test
    public void testHdfsFetchingInterrupted() throws IOException, URISyntaxException, InterruptedException {
        Configuration conf = new Configuration();
        final FileSystem fS = FileSystem.getLocal(conf);

        SploutConfiguration testConfig = SploutConfiguration.getTestConfig();
        testConfig.setProperty(FetcherProperties.TEMP_DIR, "tmp-dir-" + TestFetcher.class.getName());
        final Fetcher fetcher = new Fetcher(testConfig);

        final Path path = new Path("tmp-" + TestFetcher.class.getName());
        OutputStream oS = fS.create(path);
        oS.write("This is what happens when you don't know what to write".getBytes());
        oS.close();

        Thread t = new Thread() {
            @Override
            public void run() {
                try {
                    try {
                        File f = fetcher
                                .fetch(new Path(fS.getWorkingDirectory(), path.getName()).toUri().toString());
                    } catch (IOException e) {
                        e.printStackTrace();
                    } catch (URISyntaxException e) {
                        e.printStackTrace();
                    }
                    fail("An InterruptedException was expected.");
                } catch (InterruptedException e) {
                    // Everything good.
                }
            }
        };
        // We interrupt the thread before starting so we are sure that the interruption check
        // will be seen even if the file to copy is very small.
        t.interrupt();
        t.start();
    }

    @Test
    public void testHdfsFetchingAndThrottling() throws IOException, URISyntaxException, InterruptedException {
        Configuration conf = new Configuration();
        FileSystem fS = FileSystem.getLocal(conf);

        SploutConfiguration testConfig = SploutConfiguration.getTestConfig();
        testConfig.setProperty(FetcherProperties.TEMP_DIR, "tmp-dir-" + TestFetcher.class.getName());
        testConfig.setProperty(FetcherProperties.DOWNLOAD_BUFFER, 4);
        testConfig.setProperty(FetcherProperties.BYTES_PER_SEC_THROTTLE, 8);
        Fetcher fetcher = new Fetcher(testConfig);

        final String str = "This is what happens when you don't know what to write";

        Path path = new Path("tmp-" + TestFetcher.class.getName());
        OutputStream oS = fS.create(path);
        oS.write(str.getBytes());
        oS.close();

        long startTime = System.currentTimeMillis();
        File f = fetcher.fetch(new Path(fS.getWorkingDirectory(), path.getName()).toUri().toString());
        long endTime = System.currentTimeMillis();

        double bytesPerSec = (str.getBytes().length / (double) (endTime - startTime)) * 1000;
        assertEquals(8, bytesPerSec, 0.5);

        assertTrue(f.exists());
        assertTrue(f.isDirectory());

        File file = new File(f, "tmp-" + TestFetcher.class.getName());
        assertTrue(file.exists());

        assertEquals(str, Files.toString(file, Charset.defaultCharset()));

        fS.delete(path, true);
        FileUtils.deleteDirectory(f);
    }

    @Test
    public void testFileFetching() throws IOException, URISyntaxException, InterruptedException {
        SploutConfiguration testConfig = SploutConfiguration.getTestConfig();
        testConfig.setProperty(FetcherProperties.TEMP_DIR, "tmp-dir-" + TestFetcher.class.getName());
        Fetcher fetcher = new Fetcher(testConfig);

        File file = new File("tmp-" + TestFetcher.class.getName());
        Files.write("This is what happens when you don't know what to write".getBytes(), file);

        File f = fetcher.fetch(file.getAbsoluteFile().toURI().toString());

        assertTrue(f.exists());
        assertTrue(f.isDirectory());

        File file2 = new File(f, "tmp-" + TestFetcher.class.getName());
        assertTrue(file.exists());

        assertEquals("This is what happens when you don't know what to write",
                Files.toString(file2, Charset.defaultCharset()));

        file.delete();
        FileUtils.deleteDirectory(f);
    }

    @Test
    public void testFileFetchingAndThrottling() throws IOException, URISyntaxException, InterruptedException {
        SploutConfiguration testConfig = SploutConfiguration.getTestConfig();
        testConfig.setProperty(FetcherProperties.TEMP_DIR, "tmp-dir-" + TestFetcher.class.getName());
        testConfig.setProperty(FetcherProperties.DOWNLOAD_BUFFER, 4);
        testConfig.setProperty(FetcherProperties.BYTES_PER_SEC_THROTTLE, 8);
        Fetcher fetcher = new Fetcher(testConfig);

        final String str = "This is what happens when you don't know what to write";

        File file = new File("tmp-" + TestFetcher.class.getName());
        Files.write(str.getBytes(), file);

        long startTime = System.currentTimeMillis();
        File f = fetcher.fetch(file.getAbsoluteFile().toURI().toString());
        long endTime = System.currentTimeMillis();

        double bytesPerSec = (str.getBytes().length / (double) (endTime - startTime)) * 1000;
        assertEquals(8, bytesPerSec, 0.5);

        assertTrue(f.exists());
        assertTrue(f.isDirectory());

        File file2 = new File(f, "tmp-" + TestFetcher.class.getName());
        assertTrue(file.exists());

        assertEquals(str, Files.toString(file2, Charset.defaultCharset()));

        file.delete();
        FileUtils.deleteDirectory(f);
    }
}