org.apache.geode.internal.cache.rollingupgrade.RollingUpgradeDUnitTest.java Source code

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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.geode.internal.cache.rollingupgrade;

import org.apache.commons.io.FileUtils;
import org.apache.geode.cache.RegionShortcut;
import org.apache.geode.cache30.CacheSerializableRunnable;
import org.apache.geode.distributed.internal.DistributionConfig;
import org.apache.geode.internal.AvailablePortHelper;
import org.apache.geode.internal.Version;
import org.apache.geode.test.dunit.DistributedTestUtils;
import org.apache.geode.test.dunit.Host;
import org.apache.geode.test.dunit.IgnoredException;
import org.apache.geode.test.dunit.Invoke;
import org.apache.geode.test.dunit.LogWriterUtils;
import org.apache.geode.test.dunit.NetworkUtils;
import org.apache.geode.test.dunit.VM;
import org.apache.geode.test.dunit.internal.JUnit4DistributedTestCase;
import org.apache.geode.test.dunit.standalone.VersionManager;
import org.apache.geode.test.junit.categories.BackwardCompatibilityTest;
import org.apache.geode.test.junit.categories.DistributedTest;
import org.apache.geode.test.junit.runners.CategoryWithParameterizedRunnerFactory;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Properties;

/**
 * RollingUpgrade dunit tests are distributed among subclasses of RollingUpgradeDUnitTest to avoid
 * spurious "hangs" being declared by Hydra.
 *
 * This test will not run properly in eclipse at this point due to having to bounce vms Currently,
 * bouncing vms is necessary because we are starting gemfire with different class loaders and the
 * class loaders are lingering (possibly due to daemon threads - the vm itself is still running)
 * 
 * Note: to run in eclipse, I had to copy over the jg-magic-map.txt file into my GEMFIRE_OUTPUT
 * location, in the same directory as #MagicNumberReader otherwise the two systems were unable to
 * talk to one another due to one using a magic number and the other not. Also turnOffBounce will
 * need to be set to true so that bouncing a vm doesn't lead to a NPE.
 * 
 * @author jhuynh
 */

@Category({ DistributedTest.class, BackwardCompatibilityTest.class })
@RunWith(Parameterized.class)
@Parameterized.UseParametersRunnerFactory(CategoryWithParameterizedRunnerFactory.class)
public class RollingUpgradeDUnitTest extends JUnit4DistributedTestCase {

    @Parameterized.Parameters
    public static Collection<String> data() {
        List<String> result = VersionManager.getInstance().getVersionsWithoutCurrent();
        if (result.size() < 1) {
            throw new RuntimeException("No older versions of Geode were found to test against");
        } else {
            System.out.println("running against these versions: " + result);
        }
        return result;
    }

    private File[] testingDirs = new File[3];

    private static String diskDir = "RollingUpgradeDUnitTest";

    // Each vm will have a cache object
    private static Object cache;

    // the old version of Geode we're testing against
    private String oldVersion;

    private void deleteVMFiles() throws Exception {
        System.out.println("deleting files in vm" + VM.getCurrentVMNum());
        File pwd = new File(".");
        for (File entry : pwd.listFiles()) {
            try {
                if (entry.isDirectory()) {
                    FileUtils.deleteDirectory(entry);
                } else {
                    entry.delete();
                }
            } catch (Exception e) {
                System.out.println("Could not delete " + entry + ": " + e.getMessage());
            }
        }
    }

    private void deleteWorkingDirFiles() throws Exception {
        Invoke.invokeInEveryVM("delete files", () -> deleteVMFiles());
    }

    @Override
    public void postSetUp() throws Exception {
        deleteWorkingDirFiles();
        IgnoredException.addIgnoredException(
                "cluster configuration service not available|ConflictingPersistentDataException");
    }

    public RollingUpgradeDUnitTest(String version) {
        oldVersion = version;
    }

    @Test
    public void testRollServersOnReplicatedRegion_dataserializable() throws Exception {
        doTestRollAll("replicate", "dataserializable", oldVersion);
    }

    @Test
    public void testRollServersOnPartitionedRegion_dataserializable() throws Exception {
        doTestRollAll("partitionedRedundant", "dataserializable", oldVersion);
    }

    @Test
    public void testRollServersOnPersistentRegion_dataserializable() throws Exception {
        doTestRollAll("persistentReplicate", "dataserializable", oldVersion);
    }

    // We start an "old" locator and old servers
    // We roll the locator
    // Now we roll all the servers from old to new
    public void doTestRollAll(String regionType, String objectType, String startingVersion) throws Exception {
        final Host host = Host.getHost(0);
        VM server1 = host.getVM(startingVersion, 0);
        VM server2 = host.getVM(startingVersion, 1);
        VM server3 = host.getVM(startingVersion, 2);
        VM locator = host.getVM(startingVersion, 3);

        String regionName = "aRegion";
        String shortcutName = RegionShortcut.REPLICATE.name();
        if (regionType.equals("replicate")) {
            shortcutName = RegionShortcut.REPLICATE.name();
        } else if ((regionType.equals("partitionedRedundant"))) {
            shortcutName = RegionShortcut.PARTITION_REDUNDANT.name();
        } else if ((regionType.equals("persistentReplicate"))) {
            shortcutName = RegionShortcut.PARTITION_PERSISTENT.name();
            for (int i = 0; i < testingDirs.length; i++) {
                testingDirs[i] = new File(diskDir, "diskStoreVM_" + String.valueOf(host.getVM(i).getId()))
                        .getAbsoluteFile();
                if (!testingDirs[i].exists()) {
                    System.out.println(" Creating diskdir for server: " + i);
                    testingDirs[i].mkdirs();
                }
            }
        }

        int[] locatorPorts = AvailablePortHelper.getRandomAvailableTCPPorts(1);
        String hostName = NetworkUtils.getServerHostName(host);
        String locatorString = getLocatorString(locatorPorts);
        final Properties locatorProps = new Properties();
        // configure all class loaders for each vm

        try {
            locator.invoke(invokeStartLocator(hostName, locatorPorts[0], getTestMethodName(), locatorString,
                    locatorProps));
            invokeRunnableInVMs(invokeCreateCache(getSystemProperties(locatorPorts)), server1, server2, server3);

            // create region
            if ((regionType.equals("persistentReplicate"))) {
                for (int i = 0; i < testingDirs.length; i++) {
                    CacheSerializableRunnable runnable = invokeCreatePersistentReplicateRegion(regionName,
                            testingDirs[i]);
                    invokeRunnableInVMs(runnable, host.getVM(i));
                }
            } else {
                invokeRunnableInVMs(invokeCreateRegion(regionName, shortcutName), server1, server2, server3);
            }

            putAndVerify(objectType, server1, regionName, 0, 10, server2, server3);
            locator = rollLocatorToCurrent(locator, hostName, locatorPorts[0], getTestMethodName(), locatorString);

            server1 = rollServerToCurrentAndCreateRegion(server1, regionType, testingDirs[0], shortcutName,
                    regionName, locatorPorts);
            verifyValues(objectType, regionName, 0, 10, server1);
            putAndVerify(objectType, server1, regionName, 5, 15, server2, server3);
            putAndVerify(objectType, server2, regionName, 10, 20, server1, server3);

            server2 = rollServerToCurrentAndCreateRegion(server2, regionType, testingDirs[1], shortcutName,
                    regionName, locatorPorts);
            verifyValues(objectType, regionName, 0, 10, server2);
            putAndVerify(objectType, server2, regionName, 15, 25, server1, server3);
            putAndVerify(objectType, server3, regionName, 20, 30, server2, server3);

            server3 = rollServerToCurrentAndCreateRegion(server3, regionType, testingDirs[2], shortcutName,
                    regionName, locatorPorts);
            verifyValues(objectType, regionName, 0, 10, server3);
            putAndVerify(objectType, server3, regionName, 15, 25, server1, server2);
            putAndVerify(objectType, server1, regionName, 20, 30, server1, server2, server3);

        } finally {
            invokeRunnableInVMs(true, invokeStopLocator(), locator);
            invokeRunnableInVMs(true, invokeCloseCache(), server1, server2, server3);
            if ((regionType.equals("persistentReplicate"))) {
                deleteDiskStores();
            }
        }
    }

    // ******** TEST HELPER METHODS ********/
    private void putAndVerify(String objectType, VM putter, String regionName, int start, int end, VM check1,
            VM check2, VM check3) throws Exception {
        if (objectType.equals("strings")) {
            putStringsAndVerify(putter, regionName, start, end, check1, check2, check3);
        } else if (objectType.equals("serializable")) {
            putSerializableAndVerify(putter, regionName, start, end, check1, check2, check3);
        } else if (objectType.equals("dataserializable")) {
            putDataSerializableAndVerify(putter, regionName, start, end, check1, check2, check3);
        } else {
            throw new Error("Not a valid test object type");
        }
    }

    // ******** TEST HELPER METHODS ********/
    private void putAndVerify(String objectType, VM putter, String regionName, int start, int end, VM check1,
            VM check2) throws Exception {
        if (objectType.equals("strings")) {
            putStringsAndVerify(putter, regionName, start, end, check1, check2);
        } else if (objectType.equals("serializable")) {
            putSerializableAndVerify(putter, regionName, start, end, check1, check2);
        } else if (objectType.equals("dataserializable")) {
            putDataSerializableAndVerify(putter, regionName, start, end, check1, check2);
        } else {
            throw new Error("Not a valid test object type");
        }
    }

    private void putStringsAndVerify(VM putter, final String regionName, final int start, final int end,
            VM... vms) {
        for (int i = start; i < end; i++) {
            putter.invoke(invokePut(regionName, "" + i, "VALUE(" + i + ")"));
        }

        threadSleep();

        // verify present in others
        for (VM vm : vms) {
            vm.invoke(invokeAssertEntriesEqual(regionName, start, end));
        }
    }

    private void putSerializableAndVerify(VM putter, String regionName, int start, int end, VM... vms) {
        for (int i = start; i < end; i++) {
            putter.invoke(invokePut(regionName, "" + i, new Properties()));
        }

        threadSleep();

        // verify present in others
        for (VM vm : vms) {
            vm.invoke(invokeAssertEntriesExist(regionName, start, end));
        }
    }

    private void putDataSerializableAndVerify(VM putter, String regionName, int start, int end, VM... vms)
            throws Exception {
        for (int i = start; i < end; i++) {
            Class aClass = Thread.currentThread().getContextClassLoader()
                    .loadClass("org.apache.geode.cache.ExpirationAttributes");
            Constructor constructor = aClass.getConstructor(int.class);
            Object testDataSerializable = constructor.newInstance(i);
            putter.invoke(invokePut(regionName, "" + i, testDataSerializable));
        }

        threadSleep();

        // verify present in others
        for (VM vm : vms) {
            vm.invoke(invokeAssertEntriesExist(regionName, start, end));
        }
    }

    private void verifyValues(String objectType, String regionName, int start, int end, VM... vms) {
        threadSleep();
        if (objectType.equals("strings")) {
            for (VM vm : vms) {
                vm.invoke(invokeAssertEntriesEqual(regionName, start, end));
            }
        } else if (objectType.equals("serializable")) {
            for (VM vm : vms) {
                vm.invoke(invokeAssertEntriesExist(regionName, start, end));
            }
        } else if (objectType.equals("dataserializable")) {
            for (VM vm : vms) {
                vm.invoke(invokeAssertEntriesExist(regionName, start, end));
            }
        }
    }

    // Oddly the puts will return and for some reason the other vms have yet to recieve or process the
    // put?
    private void threadSleep() {
        try {
            Thread.sleep(250);
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
        }
    }

    private void query(String queryString, int numExpectedResults, VM... vms) {
        for (VM vm : vms) {
            vm.invoke(invokeAssertQueryResults(queryString, numExpectedResults));
        }
    }

    private void invokeRunnableInVMs(CacheSerializableRunnable runnable, VM... vms) throws Exception {
        for (VM vm : vms) {
            vm.invoke(runnable);
        }
    }

    // Used to close cache and make sure we attempt on all vms even if some do not have a cache
    private void invokeRunnableInVMs(boolean catchErrors, CacheSerializableRunnable runnable, VM... vms)
            throws Exception {
        for (VM vm : vms) {
            try {
                vm.invoke(runnable);
            } catch (Exception e) {
                if (!catchErrors) {
                    throw e;
                }
            }
        }
    }

    private VM rollServerToCurrent(VM oldServer, int[] locatorPorts) throws Exception {
        // Roll the server
        oldServer.invoke(invokeCloseCache());
        VM rollServer = Host.getHost(0).getVM(oldServer.getId()); // gets a vm with the current version
        rollServer.invoke(invokeCreateCache(
                locatorPorts == null ? getSystemPropertiesPost71() : getSystemPropertiesPost71(locatorPorts)));
        rollServer.invoke(invokeAssertVersion(Version.CURRENT_ORDINAL));
        return rollServer;
    }

    /*
     * @param rollServer
     * 
     * @param createRegionMethod
     * 
     * @param regionName
     * 
     * @param locatorPorts if null, uses dunit locator
     * 
     * @throws Exception
     */
    private void rollServerToCurrentAndCreateRegion(VM rollServer, String shortcutName, String regionName,
            int[] locatorPorts) throws Exception {
        rollServerToCurrent(rollServer, locatorPorts);
        // recreate region on "rolled" server
        invokeRunnableInVMs(invokeCreateRegion(regionName, shortcutName), rollServer);
        rollServer.invoke(invokeRebalance());
    }

    private VM rollServerToCurrentAndCreateRegion(VM oldServer, String regionType, File diskdir,
            String shortcutName, String regionName, int[] locatorPorts) throws Exception {
        VM rollServer = rollServerToCurrent(oldServer, locatorPorts);
        // recreate region on "rolled" server
        if ((regionType.equals("persistentReplicate"))) {
            CacheSerializableRunnable runnable = invokeCreatePersistentReplicateRegion(regionName, diskdir);
            invokeRunnableInVMs(runnable, rollServer);
        } else {
            invokeRunnableInVMs(invokeCreateRegion(regionName, shortcutName), rollServer);
        }
        rollServer.invoke(invokeRebalance());
        return rollServer;
    }

    private VM rollLocatorToCurrent(VM oldLocator, final String serverHostName, final int port,
            final String testName, final String locatorString) throws Exception {
        // Roll the locator
        oldLocator.invoke(invokeStopLocator());
        VM rollLocator = Host.getHost(0).getVM(oldLocator.getId()); // gets a VM with current version
        final Properties props = new Properties();
        props.setProperty(DistributionConfig.ENABLE_CLUSTER_CONFIGURATION_NAME, "false");
        rollLocator.invoke(invokeStartLocator(serverHostName, port, testName, locatorString, props));
        return rollLocator;
    }

    // Due to licensing changes
    public Properties getSystemPropertiesPost71() {
        Properties props = getSystemProperties();
        return props;
    }

    // Due to licensing changes
    public Properties getSystemPropertiesPost71(int[] locatorPorts) {
        Properties props = getSystemProperties(locatorPorts);
        return props;
    }

    public Properties getSystemProperties() {
        Properties props = DistributedTestUtils.getAllDistributedSystemProperties(new Properties());
        props.remove("disable-auto-reconnect");
        props.remove(DistributionConfig.OFF_HEAP_MEMORY_SIZE_NAME);
        props.remove(DistributionConfig.LOCK_MEMORY_NAME);
        return props;
    }

    public Properties getSystemProperties(int[] locatorPorts) {
        Properties p = new Properties();
        String locatorString = getLocatorString(locatorPorts);
        p.setProperty("locators", locatorString);
        p.setProperty("mcast-port", "0");
        return p;
    }

    public Properties getClientSystemProperties() {
        Properties p = new Properties();
        p.setProperty("mcast-port", "0");
        return p;
    }

    public static String getLocatorString(int locatorPort) {
        String locatorString = getDUnitLocatorAddress() + "[" + locatorPort + "]";
        return locatorString;
    }

    public static String getLocatorString(int[] locatorPorts) {
        String locatorString = "";
        int numLocators = locatorPorts.length;
        for (int i = 0; i < numLocators; i++) {
            locatorString += getLocatorString(locatorPorts[i]);
            if (i + 1 < numLocators) {
                locatorString += ",";
            }
        }
        return locatorString;
    }

    private List<URL> addFile(File file) throws MalformedURLException {
        ArrayList<URL> urls = new ArrayList<URL>();
        if (file.isDirectory()) {
            // Do not want to start cache with sample code xml
            if (file.getName().contains("SampleCode")) {
                return urls;
            } else {
                File[] files = file.listFiles();
                for (File afile : files) {
                    urls.addAll(addFile(afile));
                }
            }
        } else {
            URL url = file.toURI().toURL();
            urls.add(url);
        }
        return urls;
    }

    private CacheSerializableRunnable invokeStartLocator(final String serverHostName, final int port,
            final String testName, final String locatorsString, final Properties props) {
        return new CacheSerializableRunnable("execute: startLocator") {
            public void run2() {
                try {
                    startLocator(serverHostName, port, testName, locatorsString, props);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeStartLocatorAndServer(final String serverHostName, final int port,
            final String testName, final Properties systemProperties) {
        return new CacheSerializableRunnable("execute: startLocator") {
            public void run2() {
                try {
                    systemProperties.put(DistributionConfig.START_LOCATOR_NAME,
                            "" + serverHostName + "[" + port + "]");
                    RollingUpgradeDUnitTest.cache = createCache(systemProperties);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeCreateCache(final Properties systemProperties) {
        return new CacheSerializableRunnable("execute: createCache") {
            public void run2() {
                try {
                    RollingUpgradeDUnitTest.cache = createCache(systemProperties);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeCreateClientCache(final Properties systemProperties,
            final String[] hosts, final int[] ports) {
        return new CacheSerializableRunnable("execute: createClientCache") {
            public void run2() {
                try {
                    RollingUpgradeDUnitTest.cache = createClientCache(systemProperties, hosts, ports);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeStartCacheServer(final int port) {
        return new CacheSerializableRunnable("execute: startCacheServer") {
            public void run2() {
                try {
                    startCacheServer(RollingUpgradeDUnitTest.cache, port);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeAssertVersion(final short version) {
        return new CacheSerializableRunnable("execute: assertVersion") {
            public void run2() {
                try {
                    assertVersion(RollingUpgradeDUnitTest.cache, version);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeCreateRegion(final String regionName, final String shortcutName) {
        return new CacheSerializableRunnable("execute: createRegion") {
            public void run2() {
                try {
                    createRegion(RollingUpgradeDUnitTest.cache, regionName, shortcutName);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeCreatePersistentReplicateRegion(final String regionName,
            final File diskstore) {
        return new CacheSerializableRunnable("execute: createPersistentReplicateRegion") {
            public void run2() {
                try {
                    createPersistentReplicateRegion(RollingUpgradeDUnitTest.cache, regionName, diskstore);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeCreateClientRegion(final String regionName, final String shortcutName) {
        return new CacheSerializableRunnable("execute: createClientRegion") {
            public void run2() {
                try {
                    createClientRegion(RollingUpgradeDUnitTest.cache, regionName, shortcutName);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokePut(final String regionName, final Object key, final Object value) {
        return new CacheSerializableRunnable("execute: put") {
            public void run2() {
                try {
                    put(RollingUpgradeDUnitTest.cache, regionName, key, value);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeAssertEntriesEqual(final String regionName, final int start,
            final int end) {
        return new CacheSerializableRunnable("execute: assertEntriesEqual") {
            public void run2() {
                try {
                    for (int i = start; i < end; i++) {
                        assertEntryEquals(RollingUpgradeDUnitTest.cache, regionName, "" + i, "VALUE(" + i + ")");
                    }
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeAssertEntriesExist(final String regionName, final int start,
            final int end) {
        return new CacheSerializableRunnable("execute: assertEntryExists") {
            public void run2() {
                try {
                    for (int i = start; i < end; i++) {
                        assertEntryExists(RollingUpgradeDUnitTest.cache, regionName, "" + i);
                    }
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeStopLocator() {
        return new CacheSerializableRunnable("execute: stopLocator") {
            public void run2() {
                try {
                    stopLocator();
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeCloseCache() {
        return new CacheSerializableRunnable("execute: closeCache") {
            public void run2() {
                try {
                    closeCache(RollingUpgradeDUnitTest.cache);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeRebalance() {
        return new CacheSerializableRunnable("execute: rebalance") {
            public void run2() {
                try {
                    rebalance(RollingUpgradeDUnitTest.cache);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    private CacheSerializableRunnable invokeAssertQueryResults(final String queryString, final int numExpected) {
        return new CacheSerializableRunnable("execute: assertQueryResults") {
            public void run2() {
                try {
                    assertQueryResults(RollingUpgradeDUnitTest.cache, queryString, numExpected);
                } catch (Exception e) {
                    throw new RuntimeException(e);
                }
            }
        };
    }

    public void deleteDiskStores() throws Exception {
        try {
            FileUtils.deleteDirectory(new File(diskDir).getAbsoluteFile());
        } catch (IOException e) {
            throw new Error("Error deleting files", e);
        }
    }

    public static Object createCache(Properties systemProperties) throws Exception {

        // systemProperties.put(DistributionConfig.LOG_FILE_NAME,
        // "rollingUpgradeCacheVM" + VM.getCurrentVMNum() + ".log");

        Class distConfigClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.distributed.internal.DistributionConfigImpl");
        boolean disableConfig = true;
        try {
            distConfigClass.getDeclaredField("useSharedConfiguration");
        } catch (NoSuchFieldException e) {
            disableConfig = false;
        }
        if (disableConfig) {
            systemProperties.put(DistributionConfig.USE_CLUSTER_CONFIGURATION_NAME, "false");
        }

        Class cacheFactoryClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.cache.CacheFactory");
        Constructor constructor = cacheFactoryClass.getConstructor(Properties.class);
        constructor.setAccessible(true);
        Object cacheFactory = constructor.newInstance(systemProperties);

        Method createMethod = cacheFactoryClass.getMethod("create");
        createMethod.setAccessible(true);
        Object cache = null;
        cache = createMethod.invoke(cacheFactory);
        return cache;
    }

    public static void startCacheServer(Object cache, int port) throws Exception {
        Method addCacheServerMethod = cache.getClass().getMethod("addCacheServer");
        addCacheServerMethod.setAccessible(true);
        Object cacheServer = addCacheServerMethod.invoke(cache);

        Method setPortMethod = cacheServer.getClass().getMethod("setPort", int.class);
        setPortMethod.setAccessible(true);
        setPortMethod.invoke(cacheServer, port);

        Method startMethod = cacheServer.getClass().getMethod("start");
        startMethod.setAccessible(true);
        startMethod.invoke(cacheServer);
    }

    public static Object createClientCache(Properties systemProperties, String[] hosts, int[] ports)
            throws Exception {
        Class aClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.cache.client.ClientCacheFactory");
        Constructor constructor = aClass.getConstructor(Properties.class);
        constructor.setAccessible(true);

        Object ccf = constructor.newInstance(systemProperties);
        Method addPoolLocatorMethod = aClass.getMethod("addPoolLocator", String.class, int.class);
        addPoolLocatorMethod.setAccessible(true);
        int hostsLength = hosts.length;
        for (int i = 0; i < hostsLength; i++) {
            addPoolLocatorMethod.invoke(ccf, hosts[i], ports[i]);
        }

        Method createMethod = aClass.getMethod("create");
        createMethod.setAccessible(true);
        Object cache = createMethod.invoke(ccf);

        return cache;
    }

    public static boolean assertRegionExists(Object cache, String regionName) throws Exception {
        Object region = cache.getClass().getMethod("getRegion", String.class).invoke(cache, regionName);
        if (region == null) {
            throw new Error("Region: " + regionName + " does not exist");
        }
        return true;
    }

    public static Object getRegion(Object cache, String regionName) throws Exception {
        return cache.getClass().getMethod("getRegion", String.class).invoke(cache, regionName);
    }

    public static boolean assertEntryEquals(Object cache, String regionName, Object key, Object value)
            throws Exception {
        assertRegionExists(cache, regionName);
        Object region = getRegion(cache, regionName);
        Object regionValue = region.getClass().getMethod("get", Object.class).invoke(region, key);
        if (regionValue == null) {
            System.out.println("region value does not exist for key: " + key);
            throw new Error("Region value does not exist for key:" + key);
        }
        if (!regionValue.equals(value)) {
            System.out.println("Entry for key:" + key + " does not equal value: " + value);
            throw new Error("Entry for key:" + key + " does not equal value: " + value);
        }
        return true;
    }

    public static boolean assertEntryExists(Object cache, String regionName, Object key) throws Exception {
        assertRegionExists(cache, regionName);
        Object region = getRegion(cache, regionName);
        Object regionValue = region.getClass().getMethod("get", Object.class).invoke(region, key);
        if (regionValue == null) {
            System.out.println("Entry for key:" + key + " does not exist");
            throw new Error("Entry for key:" + key + " does not exist");
        }
        return true;
    }

    public static Object put(Object cache, String regionName, Object key, Object value) throws Exception {
        Object region = getRegion(cache, regionName);
        return region.getClass().getMethod("put", Object.class, Object.class).invoke(region, key, value);
    }

    public static void createRegion(Object cache, String regionName, String shortcutName) throws Exception {
        Class aClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.cache.RegionShortcut");
        Object[] enumConstants = aClass.getEnumConstants();
        Object shortcut = null;
        int length = enumConstants.length;
        for (int i = 0; i < length; i++) {
            Object constant = enumConstants[i];
            if (((Enum) constant).name().equals(shortcutName)) {
                shortcut = constant;
                break;
            }
        }

        Method createRegionFactoryMethod = cache.getClass().getMethod("createRegionFactory", aClass);
        createRegionFactoryMethod.setAccessible(true);
        Object regionFactory = createRegionFactoryMethod.invoke(cache, shortcut);
        Method createMethod = regionFactory.getClass().getMethod("create", String.class);
        createMethod.setAccessible(true);
        createMethod.invoke(regionFactory, regionName);
    }

    public static void createPartitionedRegion(Object cache, String regionName) throws Exception {
        createRegion(cache, regionName, RegionShortcut.PARTITION.name());
    }

    public static void createPartitionedRedundantRegion(Object cache, String regionName) throws Exception {
        createRegion(cache, regionName, RegionShortcut.PARTITION_REDUNDANT.name());
    }

    public static void createReplicatedRegion(Object cache, String regionName) throws Exception {
        createRegion(cache, regionName, RegionShortcut.REPLICATE.name());
    }

    // Assumes a client cache is passed
    public static void createClientRegion(Object cache, String regionName, String shortcutName) throws Exception {
        Class aClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.cache.client.ClientRegionShortcut");
        Object[] enumConstants = aClass.getEnumConstants();
        Object shortcut = null;
        int length = enumConstants.length;
        for (int i = 0; i < length; i++) {
            Object constant = enumConstants[i];
            if (((Enum) constant).name().equals(shortcutName)) {
                shortcut = constant;
                break;
            }
        }
        Object clientRegionFactory = cache.getClass().getMethod("createClientRegionFactory", shortcut.getClass())
                .invoke(cache, shortcut);
        clientRegionFactory.getClass().getMethod("create", String.class).invoke(clientRegionFactory, regionName);
    }

    public static void createRegion(String regionName, Object regionFactory) throws Exception {
        regionFactory.getClass().getMethod("create", String.class).invoke(regionFactory, regionName);
    }

    public static void createPersistentReplicateRegion(Object cache, String regionName, File diskStore)
            throws Exception {
        Object store = cache.getClass().getMethod("findDiskStore", String.class).invoke(cache, "store");
        Class dataPolicyObject = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.cache.DataPolicy");
        Object dataPolicy = dataPolicyObject.getField("PERSISTENT_REPLICATE").get(null);
        if (store == null) {
            Object dsf = cache.getClass().getMethod("createDiskStoreFactory").invoke(cache);
            dsf.getClass().getMethod("setMaxOplogSize", long.class).invoke(dsf, 1L);
            dsf.getClass().getMethod("setDiskDirs", File[].class).invoke(dsf,
                    new Object[] { new File[] { diskStore.getAbsoluteFile() } });
            dsf.getClass().getMethod("create", String.class).invoke(dsf, "store");
        }
        Object rf = cache.getClass().getMethod("createRegionFactory").invoke(cache);
        rf.getClass().getMethod("setDiskStoreName", String.class).invoke(rf, "store");
        rf.getClass().getMethod("setDataPolicy", dataPolicy.getClass()).invoke(rf, dataPolicy);
        rf.getClass().getMethod("create", String.class).invoke(rf, regionName);
    }

    public static void assertVersion(Object cache, short ordinal) throws Exception {
        Class idmClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.distributed.internal.membership.InternalDistributedMember");
        Method getDSMethod = cache.getClass().getMethod("getDistributedSystem");
        getDSMethod.setAccessible(true);
        Object ds = getDSMethod.invoke(cache);

        Method getDistributedMemberMethod = ds.getClass().getMethod("getDistributedMember");
        getDistributedMemberMethod.setAccessible(true);
        Object member = getDistributedMemberMethod.invoke(ds);
        Method getVersionObjectMethod = member.getClass().getMethod("getVersionObject");
        getVersionObjectMethod.setAccessible(true);
        Object thisVersion = getVersionObjectMethod.invoke(member);
        Method getOrdinalMethod = thisVersion.getClass().getMethod("ordinal");
        getOrdinalMethod.setAccessible(true);
        short thisOrdinal = (Short) getOrdinalMethod.invoke(thisVersion);
        if (ordinal != thisOrdinal) {
            throw new Error("Version ordinal:" + thisOrdinal + " was not the expected ordinal of:" + ordinal);
        }
    }

    public static void assertQueryResults(Object cache, String queryString, int numExpectedResults) {
        try {
            Method getQSMethod = cache.getClass().getMethod("getQueryService");
            getQSMethod.setAccessible(true);
            Object qs = getQSMethod.invoke(cache);
            Method newQueryMethod = qs.getClass().getMethod("newQuery", String.class);
            newQueryMethod.setAccessible(true);
            Object query = newQueryMethod.invoke(qs, queryString);
            Method executeMethod = query.getClass().getMethod("execute");
            executeMethod.setAccessible(true);
            Object results = executeMethod.invoke(query);

            Method sizeMethod = results.getClass().getMethod("size");
            sizeMethod.setAccessible(true);
            int numResults = (Integer) sizeMethod.invoke(results);

            if (numResults != numExpectedResults) {
                System.out.println("Num Results was:" + numResults);
                throw new Error("Num results:" + numResults + " != num expected:" + numExpectedResults);
            }
        } catch (Exception e) {
            throw new Error("Query Exception", e);
        }
    }

    public static void stopCacheServers(Object cache) throws Exception {
        Method getCacheServersMethod = cache.getClass().getMethod("getCacheServers");
        getCacheServersMethod.setAccessible(true);
        List cacheServers = (List) getCacheServersMethod.invoke(cache);
        Method stopMethod = null;
        for (Object cs : cacheServers) {
            if (stopMethod == null) {
                stopMethod = cs.getClass().getMethod("stop");
            }
            stopMethod.setAccessible(true);
            stopMethod.invoke(cs);
        }
    }

    public static void closeCache(Object cache) throws Exception {
        if (cache == null) {
            return;
        }
        Method isClosedMethod = cache.getClass().getMethod("isClosed");
        isClosedMethod.setAccessible(true);
        boolean cacheClosed = (Boolean) isClosedMethod.invoke(cache);
        if (cache != null && !cacheClosed) {
            stopCacheServers(cache);
            Method method = cache.getClass().getMethod("close");
            method.setAccessible(true);
            method.invoke(cache);
            long startTime = System.currentTimeMillis();
            while (!cacheClosed && System.currentTimeMillis() - startTime < 30000) {
                try {
                    Thread.sleep(1000);
                    Method cacheClosedMethod = cache.getClass().getMethod("isClosed");
                    cacheClosedMethod.setAccessible(true);
                    cacheClosed = (Boolean) cacheClosedMethod.invoke(cache);
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
            }
        }
        cache = null;
    }

    public static void rebalance(Object cache) throws Exception {
        Method getRMMethod = cache.getClass().getMethod("getResourceManager");
        getRMMethod.setAccessible(true);
        Object manager = getRMMethod.invoke(cache);

        Method createRebalanceFactoryMethod = manager.getClass().getMethod("createRebalanceFactory");
        createRebalanceFactoryMethod.setAccessible(true);
        Object rebalanceFactory = createRebalanceFactoryMethod.invoke(manager);
        Object op = null;
        Method m = rebalanceFactory.getClass().getMethod("start");
        m.setAccessible(true);
        op = m.invoke(rebalanceFactory);

        // Wait until the rebalance is completex
        try {
            Method getResultsMethod = op.getClass().getMethod("getResults");
            getResultsMethod.setAccessible(true);
            Object results = getResultsMethod.invoke(op);
            Method getTotalTimeMethod = results.getClass().getMethod("getTotalTime");
            getTotalTimeMethod.setAccessible(true);
            System.out.println("Took " + getTotalTimeMethod.invoke(results) + " milliseconds\n");
            Method getTotalBucketsMethod = results.getClass().getMethod("getTotalBucketTransferBytes");
            getTotalBucketsMethod.setAccessible(true);
            System.out.println("Transfered " + getTotalBucketsMethod.invoke(results) + "bytes\n");
        } catch (Exception e) {
            Thread.currentThread().interrupt();
            throw e;
        }
    }

    /**
     * Starts a locator with given configuration.
     * 
     * @param props TODO
     */
    public static void startLocator(final String serverHostName, final int port, final String testName,
            final String locatorsString, final Properties props) throws Exception {
        props.setProperty(DistributionConfig.MCAST_PORT_NAME, "0");
        props.setProperty(DistributionConfig.LOCATORS_NAME, locatorsString);
        props.setProperty(DistributionConfig.LOG_LEVEL_NAME, LogWriterUtils.getDUnitLogLevel());

        InetAddress bindAddr = null;
        try {
            bindAddr = InetAddress.getByName(serverHostName);// getServerHostName(vm.getHost()));
        } catch (UnknownHostException uhe) {
            throw new Error("While resolving bind address ", uhe);
        }

        File logFile = new File(testName + "-locator" + port + ".log");
        Class locatorClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.distributed.Locator");
        Method startLocatorAndDSMethod = locatorClass.getMethod("startLocatorAndDS", int.class, File.class,
                InetAddress.class, Properties.class, boolean.class, boolean.class, String.class);
        startLocatorAndDSMethod.setAccessible(true);
        startLocatorAndDSMethod.invoke(null, port, logFile, bindAddr, props, true, true, null);
    }

    public static void stopLocator() throws Exception {
        Class internalLocatorClass = Thread.currentThread().getContextClassLoader()
                .loadClass("org.apache.geode.distributed.internal.InternalLocator");
        Method locatorMethod = internalLocatorClass.getMethod("getLocator");
        locatorMethod.setAccessible(true);
        Object locator = locatorMethod.invoke(null);
        Method stopLocatorMethod = locator.getClass().getMethod("stop");
        stopLocatorMethod.setAccessible(true);
        stopLocatorMethod.invoke(locator);
    }

    /**
     * Get the port that the standard dunit locator is listening on.
     * 
     * @return
     */
    public static String getDUnitLocatorAddress() {
        return Host.getHost(0).getHostName();
    }

}