com.datatorrent.common.util.AsyncFSStorageAgentTest.java Source code

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Here is the source code for com.datatorrent.common.util.AsyncFSStorageAgentTest.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 com.datatorrent.common.util;

import java.io.File;
import java.io.IOException;
import java.util.Map;

import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TestWatcher;
import org.junit.runner.Description;

import org.apache.commons.io.FileUtils;
import org.apache.hadoop.fs.FileContext;
import org.apache.hadoop.fs.Path;

import com.google.common.collect.Maps;

import com.datatorrent.api.Attribute;
import com.datatorrent.api.DAG;

public class AsyncFSStorageAgentTest {
    private static class TestMeta extends TestWatcher {
        String applicationPath;
        String basePath;
        AsyncFSStorageAgent storageAgent;

        @Override
        protected void starting(Description description) {
            super.starting(description);
            basePath = "target/" + description.getClassName() + "/" + description.getMethodName();
            applicationPath = basePath + "/app";
            try {
                FileUtils.forceMkdir(new File(basePath));
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
            storageAgent = new AsyncFSStorageAgent(applicationPath, null);

            Attribute.AttributeMap.DefaultAttributeMap attributes = new Attribute.AttributeMap.DefaultAttributeMap();
            attributes.put(DAG.APPLICATION_PATH, applicationPath);
        }

        @Override
        protected void finished(Description description) {
            try {
                FileUtils.deleteDirectory(new File("target/" + description.getClassName()));
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    }

    @Rule
    public TestMeta testMeta = new TestMeta();

    @Test
    public void testSave() throws IOException {
        Map<Integer, String> data = Maps.newHashMap();
        data.put(1, "one");
        data.put(2, "two");
        data.put(3, "three");
        testMeta.storageAgent.save(data, 1, 1);
        testMeta.storageAgent.copyToHDFS(1, 1);
        @SuppressWarnings("unchecked")
        Map<Integer, String> decoded = (Map<Integer, String>) testMeta.storageAgent.load(1, 1);
        Assert.assertEquals("dataOf1", data, decoded);
    }

    @Test
    public void testLoad() throws IOException {
        Map<Integer, String> dataOf1 = Maps.newHashMap();
        dataOf1.put(1, "one");
        dataOf1.put(2, "two");
        dataOf1.put(3, "three");

        Map<Integer, String> dataOf2 = Maps.newHashMap();
        dataOf2.put(4, "four");
        dataOf2.put(5, "five");
        dataOf2.put(6, "six");

        testMeta.storageAgent.save(dataOf1, 1, 1);
        testMeta.storageAgent.copyToHDFS(1, 1);
        testMeta.storageAgent.save(dataOf2, 2, 1);
        testMeta.storageAgent.copyToHDFS(2, 1);
        @SuppressWarnings("unchecked")
        Map<Integer, String> decoded1 = (Map<Integer, String>) testMeta.storageAgent.load(1, 1);

        @SuppressWarnings("unchecked")
        Map<Integer, String> decoded2 = (Map<Integer, String>) testMeta.storageAgent.load(2, 1);
        Assert.assertEquals("data of 1", dataOf1, decoded1);
        Assert.assertEquals("data of 2", dataOf2, decoded2);
    }

    @Test
    public void testRecovery() throws IOException {
        testSave();
        testMeta.storageAgent = new AsyncFSStorageAgent(testMeta.applicationPath, null);
        testSave();
    }

    @Test
    public void testDelete() throws IOException {
        testLoad();
        testMeta.storageAgent.delete(1, 1);
        Path appPath = new Path(testMeta.applicationPath);
        FileContext fileContext = FileContext.getFileContext();
        Assert.assertTrue("operator 2 window 1", fileContext.util().exists(new Path(appPath + "/" + 2 + "/" + 1)));
        Assert.assertFalse("operator 1 window 1", fileContext.util().exists(new Path(appPath + "/" + 1 + "/" + 1)));
    }
}