storm-server/src/test/java/org/apache/storm/blobstore/LocalFsBlobStoreSynchronizerTest.java

/**
 * 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.storm.blobstore;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import org.apache.commons.io.FileUtils;
import org.apache.curator.test.TestingServer;
import org.apache.storm.Config;
import org.apache.storm.nimbus.NimbusInfo;
import org.apache.storm.shade.org.apache.curator.framework.CuratorFramework;
import org.apache.storm.shade.org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.storm.shade.org.apache.curator.retry.ExponentialBackoffRetry;
import org.apache.storm.utils.Utils;
import org.apache.zookeeper.server.NIOServerCnxnFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

/**
 *  Unit tests for most of the testable utility methods
 *  and LocalFsBlobStoreSynchronizer class methods
 */
public class LocalFsBlobStoreSynchronizerTest {
  private URI base;
  private File baseFile;
  private static Map<String, Object> conf = new HashMap();
  private NIOServerCnxnFactory factory;

    // Method which initializes nimbus admin
    public static void initializeConfigs() {
        conf.put(Config.NIMBUS_ADMINS, "admin");
        conf.put(Config.NIMBUS_SUPERVISOR_USERS, "supervisor");
    }

    @Before
    public void init() throws Exception {
        initializeConfigs();
        baseFile = new File("target/blob-store-test-" + UUID.randomUUID());
        base = baseFile.toURI();
    }

    @After
    public void cleanUp() throws IOException {
        FileUtils.deleteDirectory(baseFile);
        if (factory != null) {
            factory.shutdown();
        }
    }

    private LocalFsBlobStore initLocalFs() {
        LocalFsBlobStore store = new LocalFsBlobStore();
        Map<String, Object> conf = Utils.readStormConfig();
        conf.put(Config.STORM_LOCAL_DIR, baseFile.getAbsolutePath());
        conf.put(Config.STORM_PRINCIPAL_TO_LOCAL_PLUGIN, "org.apache.storm.security.auth.DefaultPrincipalToLocal");
        this.conf = conf;
        store.prepare(conf, null, null, null);
        return store;
    }

  @Test
  public void testBlobSynchronizerForKeysToDownload() {
    BlobStore store = initLocalFs();
    LocalFsBlobStoreSynchronizer sync = new LocalFsBlobStoreSynchronizer(store, conf);
    // test for keylist to download
    Set<String> zkSet = new HashSet<String>();
    zkSet.add("key1");
    Set<String> blobStoreSet = new HashSet<String>();
    blobStoreSet.add("key1");
    Set<String> resultSet = sync.getKeySetToDownload(blobStoreSet, zkSet);
    assertTrue("Not Empty", resultSet.isEmpty());
    zkSet.add("key1");
    blobStoreSet.add("key2");
    resultSet =  sync.getKeySetToDownload(blobStoreSet, zkSet);
    assertTrue("Not Empty", resultSet.isEmpty());
    blobStoreSet.remove("key1");
    blobStoreSet.remove("key2");
    zkSet.add("key1");
    resultSet =  sync.getKeySetToDownload(blobStoreSet, zkSet);
    assertTrue("Unexpected keys to download", (resultSet.size() == 1) && (resultSet.contains("key1")));
  }

    @Test
    public void testGetLatestSequenceNumber() throws Exception {
        List<String> stateInfoList = new ArrayList<String>();
        stateInfoList.add("nimbus1:8000-2");
        stateInfoList.add("nimbus-1:8000-4");
        assertTrue("Failed to get the latest version", BlobStoreUtils.getLatestSequenceNumber(stateInfoList) == 4);
    }

    @Test
    public void testNimbodesWithLatestVersionOfBlob() throws Exception {
        try (TestingServer server = new TestingServer(); CuratorFramework zkClient = CuratorFrameworkFactory
            .newClient(server.getConnectString(), new ExponentialBackoffRetry(1000, 3))) {
            zkClient.start();
            // Creating nimbus hosts containing latest version of blob
            zkClient.create().creatingParentContainersIfNeeded().forPath("/blobstore/key1/nimbus1:7800-1");
            zkClient.create().creatingParentContainersIfNeeded().forPath("/blobstore/key1/nimbus2:7800-2");
            Set<NimbusInfo> set = BlobStoreUtils.getNimbodesWithLatestSequenceNumberOfBlob(zkClient, "key1");
            assertEquals("Failed to get the correct nimbus hosts with latest blob version", (set.iterator().next()).getHost(), "nimbus2");
            zkClient.delete().deletingChildrenIfNeeded().forPath("/blobstore/key1/nimbus1:7800-1");
            zkClient.delete().deletingChildrenIfNeeded().forPath("/blobstore/key1/nimbus2:7800-2");
        }
    }

    @Test
    public void testNormalizeVersionInfo() throws Exception {
        BlobKeySequenceInfo info1 = BlobStoreUtils.normalizeNimbusHostPortSequenceNumberInfo("nimbus1:7800-1");
        assertTrue(info1.getNimbusHostPort().equals("nimbus1:7800"));
        assertTrue(info1.getSequenceNumber().equals("1"));
        BlobKeySequenceInfo info2 = BlobStoreUtils.normalizeNimbusHostPortSequenceNumberInfo("nimbus-1:7800-1");
        assertTrue(info2.getNimbusHostPort().equals("nimbus-1:7800"));
        assertTrue(info2.getSequenceNumber().equals("1"));
    }
}