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Posted to commits@atlas.apache.org by dk...@apache.org on 2016/08/05 23:27:37 UTC
[7/9] incubator-atlas git commit: ATLAS-693 Titan 0.5.4
implementation of graph db abstraction. (jnhagelb via dkantor)
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseStoreManager.java
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diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseStoreManager.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseStoreManager.java
new file mode 100644
index 0000000..a94a7e4
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+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseStoreManager.java
@@ -0,0 +1,935 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.hbase;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.NavigableMap;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+
+import com.thinkaurelius.titan.diskstorage.Backend;
+import com.thinkaurelius.titan.diskstorage.configuration.ConfigElement;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.CustomizeStoreKCVSManager;
+import com.thinkaurelius.titan.diskstorage.locking.LocalLockMediator;
+import com.thinkaurelius.titan.diskstorage.locking.LocalLockMediators;
+import com.thinkaurelius.titan.diskstorage.util.time.Timestamps;
+import org.apache.hadoop.hbase.HBaseConfiguration;
+import org.apache.hadoop.hbase.HColumnDescriptor;
+import org.apache.hadoop.hbase.HRegionInfo;
+import org.apache.hadoop.hbase.HTableDescriptor;
+import org.apache.hadoop.hbase.MasterNotRunningException;
+import org.apache.hadoop.hbase.ServerName;
+import org.apache.hadoop.hbase.TableNotEnabledException;
+import org.apache.hadoop.hbase.TableNotFoundException;
+import org.apache.hadoop.hbase.ZooKeeperConnectionException;
+import org.apache.hadoop.hbase.client.Delete;
+import org.apache.hadoop.hbase.client.HBaseAdmin;
+import org.apache.hadoop.hbase.client.HTable;
+import org.apache.hadoop.hbase.client.Put;
+import org.apache.hadoop.hbase.client.Row;
+import org.apache.hadoop.hbase.io.encoding.DataBlockEncoding;
+import org.apache.hadoop.hbase.util.Pair;
+import org.apache.hadoop.hbase.util.VersionInfo;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.google.common.base.Function;
+import com.google.common.base.Joiner;
+import com.google.common.base.Preconditions;
+import com.google.common.base.Predicate;
+import com.google.common.collect.BiMap;
+import com.google.common.collect.ImmutableBiMap;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Sets;
+import com.thinkaurelius.titan.core.TitanException;
+import com.thinkaurelius.titan.diskstorage.BackendException;
+import com.thinkaurelius.titan.diskstorage.BaseTransactionConfig;
+import com.thinkaurelius.titan.diskstorage.Entry;
+import com.thinkaurelius.titan.diskstorage.PermanentBackendException;
+import com.thinkaurelius.titan.diskstorage.StaticBuffer;
+import com.thinkaurelius.titan.diskstorage.TemporaryBackendException;
+import com.thinkaurelius.titan.diskstorage.common.DistributedStoreManager;
+import com.thinkaurelius.titan.diskstorage.configuration.ConfigNamespace;
+import com.thinkaurelius.titan.diskstorage.configuration.ConfigOption;
+import com.thinkaurelius.titan.diskstorage.configuration.Configuration;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.KCVMutation;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.KeyColumnValueStore;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.KeyColumnValueStoreManager;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.KeyRange;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.StandardStoreFeatures;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.StoreFeatures;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.StoreTransaction;
+import com.thinkaurelius.titan.diskstorage.util.BufferUtil;
+import com.thinkaurelius.titan.diskstorage.util.StaticArrayBuffer;
+import com.thinkaurelius.titan.graphdb.configuration.GraphDatabaseConfiguration;
+import com.thinkaurelius.titan.graphdb.configuration.PreInitializeConfigOptions;
+import com.thinkaurelius.titan.util.system.IOUtils;
+import com.thinkaurelius.titan.util.system.NetworkUtil;
+
+/**
+ * Storage Manager for HBase
+ *
+ * @author Dan LaRocque <da...@hopcount.org>
+ */
+@PreInitializeConfigOptions
+public class HBaseStoreManager extends DistributedStoreManager implements KeyColumnValueStoreManager, CustomizeStoreKCVSManager {
+
+ private static final Logger logger = LoggerFactory.getLogger(HBaseStoreManager.class);
+
+ public static final ConfigNamespace HBASE_NS =
+ new ConfigNamespace(GraphDatabaseConfiguration.STORAGE_NS, "hbase", "HBase storage options");
+
+ public static final ConfigOption<Boolean> SHORT_CF_NAMES =
+ new ConfigOption<Boolean>(HBASE_NS, "short-cf-names",
+ "Whether to shorten the names of Titan's column families to one-character mnemonics " +
+ "to conserve storage space", ConfigOption.Type.FIXED, true);
+
+ public static final String COMPRESSION_DEFAULT = "-DEFAULT-";
+
+ public static final ConfigOption<String> COMPRESSION =
+ new ConfigOption<String>(HBASE_NS, "compression-algorithm",
+ "An HBase Compression.Algorithm enum string which will be applied to newly created column families. " +
+ "The compression algorithm must be installed and available on the HBase cluster. Titan cannot install " +
+ "and configure new compression algorithms on the HBase cluster by itself.",
+ ConfigOption.Type.MASKABLE, "GZ");
+
+ public static final ConfigOption<Boolean> SKIP_SCHEMA_CHECK =
+ new ConfigOption<Boolean>(HBASE_NS, "skip-schema-check",
+ "Assume that Titan's HBase table and column families already exist. " +
+ "When this is true, Titan will not check for the existence of its table/CFs, " +
+ "nor will it attempt to create them under any circumstances. This is useful " +
+ "when running Titan without HBase admin privileges.",
+ ConfigOption.Type.MASKABLE, false);
+
+ public static final ConfigOption<String> HBASE_TABLE =
+ new ConfigOption<String>(HBASE_NS, "table",
+ "The name of the table Titan will use. When " + ConfigElement.getPath(SKIP_SCHEMA_CHECK) +
+ " is false, Titan will automatically create this table if it does not already exist.",
+ ConfigOption.Type.LOCAL, "titan");
+
+ /**
+ * Related bug fixed in 0.98.0, 0.94.7, 0.95.0:
+ *
+ * https://issues.apache.org/jira/browse/HBASE-8170
+ */
+ public static final int MIN_REGION_COUNT = 3;
+
+ /**
+ * The total number of HBase regions to create with Titan's table. This
+ * setting only effects table creation; this normally happens just once when
+ * Titan connects to an HBase backend for the first time.
+ */
+ public static final ConfigOption<Integer> REGION_COUNT =
+ new ConfigOption<Integer>(HBASE_NS, "region-count",
+ "The number of initial regions set when creating Titan's HBase table",
+ ConfigOption.Type.MASKABLE, Integer.class, new Predicate<Integer>() {
+ @Override
+ public boolean apply(Integer input) {
+ return null != input && MIN_REGION_COUNT <= input;
+ }
+ }
+ );
+
+ /**
+ * This setting is used only when {@link #REGION_COUNT} is unset.
+ * <p/>
+ * If Titan's HBase table does not exist, then it will be created with total
+ * region count = (number of servers reported by ClusterStatus) * (this
+ * value).
+ * <p/>
+ * The Apache HBase manual suggests an order-of-magnitude range of potential
+ * values for this setting:
+ *
+ * <ul>
+ * <li>
+ * <a href="https://hbase.apache.org/book/important_configurations.html#disable.splitting">2.5.2.7. Managed Splitting</a>:
+ * <blockquote>
+ * What's the optimal number of pre-split regions to create? Mileage will
+ * vary depending upon your application. You could start low with 10
+ * pre-split regions / server and watch as data grows over time. It's
+ * better to err on the side of too little regions and rolling split later.
+ * </blockquote>
+ * </li>
+ * <li>
+ * <a href="https://hbase.apache.org/book/regions.arch.html">9.7 Regions</a>:
+ * <blockquote>
+ * In general, HBase is designed to run with a small (20-200) number of
+ * relatively large (5-20Gb) regions per server... Typically you want to
+ * keep your region count low on HBase for numerous reasons. Usually
+ * right around 100 regions per RegionServer has yielded the best results.
+ * </blockquote>
+ * </li>
+ * </ul>
+ *
+ * These considerations may differ for other HBase implementations (e.g. MapR).
+ */
+ public static final ConfigOption<Integer> REGIONS_PER_SERVER =
+ new ConfigOption<Integer>(HBASE_NS, "regions-per-server",
+ "The number of regions per regionserver to set when creating Titan's HBase table",
+ ConfigOption.Type.MASKABLE, Integer.class);
+
+ /**
+ * If this key is present in either the JVM system properties or the process
+ * environment (checked in the listed order, first hit wins), then its value
+ * must be the full package and class name of an implementation of
+ * {@link HBaseCompat} that has a no-arg public constructor.
+ * <p>
+ * When this <b>is not</b> set, Titan attempts to automatically detect the
+ * HBase runtime version by calling {@link VersionInfo#getVersion()}. Titan
+ * then checks the returned version string against a hard-coded list of
+ * supported version prefixes and instantiates the associated compat layer
+ * if a match is found.
+ * <p>
+ * When this <b>is</b> set, Titan will not call
+ * {@code VersionInfo.getVersion()} or read its hard-coded list of supported
+ * version prefixes. Titan will instead attempt to instantiate the class
+ * specified (via the no-arg constructor which must exist) and then attempt
+ * to cast it to HBaseCompat and use it as such. Titan will assume the
+ * supplied implementation is compatible with the runtime HBase version and
+ * make no attempt to verify that assumption.
+ * <p>
+ * Setting this key incorrectly could cause runtime exceptions at best or
+ * silent data corruption at worst. This setting is intended for users
+ * running exotic HBase implementations that don't support VersionInfo or
+ * implementations which return values from {@code VersionInfo.getVersion()}
+ * that are inconsistent with Apache's versioning convention. It may also be
+ * useful to users who want to run against a new release of HBase that Titan
+ * doesn't yet officially support.
+ *
+ */
+ public static final ConfigOption<String> COMPAT_CLASS =
+ new ConfigOption<String>(HBASE_NS, "compat-class",
+ "The package and class name of the HBaseCompat implementation. HBaseCompat masks version-specific HBase API differences. " +
+ "When this option is unset, Titan calls HBase's VersionInfo.getVersion() and loads the matching compat class " +
+ "at runtime. Setting this option forces Titan to instead reflectively load and instantiate the specified class.",
+ ConfigOption.Type.MASKABLE, String.class);
+
+ public static final int PORT_DEFAULT = 9160;
+
+ public static final Timestamps PREFERRED_TIMESTAMPS = Timestamps.MILLI;
+
+ public static final ConfigNamespace HBASE_CONFIGURATION_NAMESPACE =
+ new ConfigNamespace(HBASE_NS, "ext", "Overrides for hbase-{site,default}.xml options", true);
+
+ private static final BiMap<String, String> SHORT_CF_NAME_MAP =
+ ImmutableBiMap.<String, String>builder()
+ .put(Backend.INDEXSTORE_NAME, "g")
+ .put(Backend.INDEXSTORE_NAME + Backend.LOCK_STORE_SUFFIX, "h")
+ .put(Backend.ID_STORE_NAME, "i")
+ .put(Backend.EDGESTORE_NAME, "e")
+ .put(Backend.EDGESTORE_NAME + Backend.LOCK_STORE_SUFFIX, "f")
+ .put(GraphDatabaseConfiguration.SYSTEM_PROPERTIES_STORE_NAME, "s")
+ .put(GraphDatabaseConfiguration.SYSTEM_PROPERTIES_STORE_NAME + Backend.LOCK_STORE_SUFFIX, "t")
+ .put(Backend.SYSTEM_MGMT_LOG_NAME, "m")
+ .put(Backend.SYSTEM_TX_LOG_NAME, "l")
+ .build();
+
+ private static final StaticBuffer FOUR_ZERO_BYTES = BufferUtil.zeroBuffer(4);
+
+ static {
+ // Verify that shortCfNameMap is injective
+ // Should be guaranteed by Guava BiMap, but it doesn't hurt to check
+ Preconditions.checkArgument(null != SHORT_CF_NAME_MAP);
+ Collection<String> shorts = SHORT_CF_NAME_MAP.values();
+ Preconditions.checkArgument(Sets.newHashSet(shorts).size() == shorts.size());
+ }
+
+ // Immutable instance fields
+ private final String tableName;
+ private final String compression;
+ private final int regionCount;
+ private final int regionsPerServer;
+ private final ConnectionMask cnx;
+ private final org.apache.hadoop.conf.Configuration hconf;
+ private final boolean shortCfNames;
+ private final boolean skipSchemaCheck;
+ private final String compatClass;
+ private final HBaseCompat compat;
+
+ private static final ConcurrentHashMap<HBaseStoreManager, Throwable> openManagers =
+ new ConcurrentHashMap<HBaseStoreManager, Throwable>();
+
+ // Mutable instance state
+ private final ConcurrentMap<String, HBaseKeyColumnValueStore> openStores;
+
+ private LocalLockMediator<StoreTransaction> llm;
+
+ public HBaseStoreManager(com.thinkaurelius.titan.diskstorage.configuration.Configuration config) throws BackendException {
+ super(config, PORT_DEFAULT);
+
+ checkConfigDeprecation(config);
+
+ this.tableName = config.get(HBASE_TABLE);
+ this.compression = config.get(COMPRESSION);
+ this.regionCount = config.has(REGION_COUNT) ? config.get(REGION_COUNT) : -1;
+ this.regionsPerServer = config.has(REGIONS_PER_SERVER) ? config.get(REGIONS_PER_SERVER) : -1;
+ this.skipSchemaCheck = config.get(SKIP_SCHEMA_CHECK);
+ this.compatClass = config.has(COMPAT_CLASS) ? config.get(COMPAT_CLASS) : null;
+ this.compat = HBaseCompatLoader.getCompat(compatClass);
+
+ /*
+ * Specifying both region count options is permitted but may be
+ * indicative of a misunderstanding, so issue a warning.
+ */
+ if (config.has(REGIONS_PER_SERVER) && config.has(REGION_COUNT)) {
+ logger.warn("Both {} and {} are set in Titan's configuration, but "
+ + "the former takes precedence and the latter will be ignored.",
+ REGION_COUNT, REGIONS_PER_SERVER);
+ }
+
+ /* This static factory calls HBaseConfiguration.addHbaseResources(),
+ * which in turn applies the contents of hbase-default.xml and then
+ * applies the contents of hbase-site.xml.
+ */
+ this.hconf = HBaseConfiguration.create();
+
+ // Copy a subset of our commons config into a Hadoop config
+ int keysLoaded=0;
+ Map<String,Object> configSub = config.getSubset(HBASE_CONFIGURATION_NAMESPACE);
+ for (Map.Entry<String,Object> entry : configSub.entrySet()) {
+ logger.info("HBase configuration: setting {}={}", entry.getKey(), entry.getValue());
+ if (entry.getValue()==null) continue;
+ hconf.set(entry.getKey(), entry.getValue().toString());
+ keysLoaded++;
+ }
+
+ // Special case for STORAGE_HOSTS
+ if (config.has(GraphDatabaseConfiguration.STORAGE_HOSTS)) {
+ String zkQuorumKey = "hbase.zookeeper.quorum";
+ String csHostList = Joiner.on(",").join(config.get(GraphDatabaseConfiguration.STORAGE_HOSTS));
+ hconf.set(zkQuorumKey, csHostList);
+ logger.info("Copied host list from {} to {}: {}", GraphDatabaseConfiguration.STORAGE_HOSTS, zkQuorumKey, csHostList);
+ }
+
+ logger.debug("HBase configuration: set a total of {} configuration values", keysLoaded);
+
+ this.shortCfNames = config.get(SHORT_CF_NAMES);
+
+ try {
+ //this.cnx = HConnectionManager.createConnection(hconf);
+ this.cnx = compat.createConnection(hconf);
+ } catch (IOException e) {
+ throw new PermanentBackendException(e);
+ }
+
+ if (logger.isTraceEnabled()) {
+ openManagers.put(this, new Throwable("Manager Opened"));
+ dumpOpenManagers();
+ }
+
+ logger.debug("Dumping HBase config key=value pairs");
+ for (Map.Entry<String, String> entry : hconf) {
+ logger.debug("[HBaseConfig] " + entry.getKey() + "=" + entry.getValue());
+ }
+ logger.debug("End of HBase config key=value pairs");
+
+ openStores = new ConcurrentHashMap<String, HBaseKeyColumnValueStore>();
+ }
+
+ @Override
+ public Deployment getDeployment() {
+ return Deployment.REMOTE;
+
+ /* If just one of the regions for titan table is in the localhost,
+ * this method returns Deployment.LOCAL - which does not sound right.
+ *
+ List<KeyRange> local;
+ try {
+ local = getLocalKeyPartition();
+ return null != local && !local.isEmpty() ? Deployment.LOCAL : Deployment.REMOTE;
+ } catch (BackendException e) {
+ // propagating StorageException might be a better approach
+ throw new RuntimeException(e);
+ }
+ *
+ */
+ }
+
+ @Override
+ public String toString() {
+ return "hbase[" + tableName + "@" + super.toString() + "]";
+ }
+
+ public void dumpOpenManagers() {
+ int estimatedSize = openManagers.size();
+ logger.trace("---- Begin open HBase store manager list ({} managers) ----", estimatedSize);
+ for (HBaseStoreManager m : openManagers.keySet()) {
+ logger.trace("Manager {} opened at:", m, openManagers.get(m));
+ }
+ logger.trace("---- End open HBase store manager list ({} managers) ----", estimatedSize);
+ }
+
+ @Override
+ public void close() {
+ openStores.clear();
+ if (logger.isTraceEnabled())
+ openManagers.remove(this);
+ IOUtils.closeQuietly(cnx);
+ }
+
+ @Override
+ public StoreFeatures getFeatures() {
+
+ Configuration c = GraphDatabaseConfiguration.buildConfiguration();
+
+ StandardStoreFeatures.Builder fb = new StandardStoreFeatures.Builder()
+ .orderedScan(true).unorderedScan(true).batchMutation(true)
+ .multiQuery(true).distributed(true).keyOrdered(true).storeTTL(true)
+ .timestamps(true).preferredTimestamps(PREFERRED_TIMESTAMPS)
+ .locking(true)
+ .keyConsistent(c);
+
+ try {
+ fb.localKeyPartition(getDeployment() == Deployment.LOCAL);
+ } catch (Exception e) {
+ logger.warn("Unexpected exception during getDeployment()", e);
+ }
+
+ return fb.build();
+ }
+
+ @Override
+ public void mutateMany(Map<String, Map<StaticBuffer, KCVMutation>> mutations, StoreTransaction txh) throws BackendException {
+ logger.debug("Enter mutateMany");
+ final MaskedTimestamp commitTime = new MaskedTimestamp(txh);
+ // In case of an addition and deletion with identical timestamps, the
+ // deletion tombstone wins.
+ // http://hbase.apache.org/book/versions.html#d244e4250
+ Map<StaticBuffer, Pair<Put, Delete>> commandsPerKey =
+ convertToCommands(
+ mutations,
+ commitTime.getAdditionTime(times.getUnit()),
+ commitTime.getDeletionTime(times.getUnit()));
+
+ List<Row> batch = new ArrayList<Row>(commandsPerKey.size()); // actual batch operation
+
+ // convert sorted commands into representation required for 'batch' operation
+ for (Pair<Put, Delete> commands : commandsPerKey.values()) {
+ if (commands.getFirst() != null)
+ batch.add(commands.getFirst());
+
+ if (commands.getSecond() != null)
+ batch.add(commands.getSecond());
+ }
+
+ try {
+ TableMask table = null;
+
+ try {
+ table = cnx.getTable(tableName);
+ logger.debug("mutateMany : batch mutate started size {} ", batch.size());
+ table.batch(batch, new Object[batch.size()]);
+ logger.debug("mutateMany : batch mutate finished {} ", batch.size());
+ } finally {
+ IOUtils.closeQuietly(table);
+ }
+ } catch (IOException e) {
+ throw new TemporaryBackendException(e);
+ } catch (InterruptedException e) {
+ throw new TemporaryBackendException(e);
+ }
+
+ sleepAfterWrite(txh, commitTime);
+ }
+
+ @Override
+ public KeyColumnValueStore openDatabase(String longName) throws BackendException {
+
+ return openDatabase(longName, -1);
+ }
+
+ @Override
+ public KeyColumnValueStore openDatabase(final String longName, int ttlInSeconds) throws BackendException {
+
+ HBaseKeyColumnValueStore store = openStores.get(longName);
+
+ if (store == null) {
+ final String cfName = shortCfNames ? shortenCfName(longName) : longName;
+
+ final String llmPrefix = getName();
+ llm = LocalLockMediators.INSTANCE.<StoreTransaction>get(llmPrefix, times);
+ HBaseKeyColumnValueStore newStore = new HBaseKeyColumnValueStore(this, cnx, tableName, cfName, longName, llm);
+
+ store = openStores.putIfAbsent(longName, newStore); // nothing bad happens if we loose to other thread
+
+ if (store == null) {
+ if (!skipSchemaCheck)
+ ensureColumnFamilyExists(tableName, cfName, ttlInSeconds);
+
+ store = newStore;
+ }
+ logger.info("Loaded 1.x Hbase Client Store Manager");
+ }
+
+ return store;
+ }
+
+
+ @Override
+ public StoreTransaction beginTransaction(final BaseTransactionConfig config) throws BackendException {
+ return new HBaseTransaction(config, llm);
+ }
+
+ @Override
+ public String getName() {
+ return tableName;
+ }
+
+ /**
+ * Deletes the specified table with all its columns.
+ * ATTENTION: Invoking this method will delete the table if it exists and therefore causes data loss.
+ */
+ @Override
+ public void clearStorage() throws BackendException {
+ try (AdminMask adm = getAdminInterface()) {
+ adm.clearTable(tableName, times.getTime().getNativeTimestamp());
+ } catch (IOException e)
+ {
+ throw new TemporaryBackendException(e);
+ }
+ }
+
+ @Override
+ public List<KeyRange> getLocalKeyPartition() throws BackendException {
+
+ List<KeyRange> result = new LinkedList<KeyRange>();
+
+ TableMask table = null;
+ try {
+ ensureTableExists(tableName, getCfNameForStoreName(GraphDatabaseConfiguration.SYSTEM_PROPERTIES_STORE_NAME), 0);
+
+ table = cnx.getTable(tableName);
+
+ HTable hTable = (HTable)table.getTableObject();
+
+ Map<KeyRange, ServerName> normed =
+ normalizeKeyBounds(hTable.getRegionLocations());
+
+ for (Map.Entry<KeyRange, ServerName> e : normed.entrySet()) {
+ if (NetworkUtil.isLocalConnection(e.getValue().getHostname())) {
+ result.add(e.getKey());
+ logger.debug("Found local key/row partition {} on host {}", e.getKey(), e.getValue());
+ } else {
+ logger.debug("Discarding remote {}", e.getValue());
+ }
+ }
+ } catch (MasterNotRunningException e) {
+ logger.warn("Unexpected MasterNotRunningException", e);
+ } catch (ZooKeeperConnectionException e) {
+ logger.warn("Unexpected ZooKeeperConnectionException", e);
+ } catch (IOException e) {
+ logger.warn("Unexpected IOException", e);
+ } finally {
+ IOUtils.closeQuietly(table);
+ }
+ return result;
+ }
+
+ /**
+ * Given a map produced by {@link HTable#getRegionLocations()}, transform
+ * each key from an {@link HRegionInfo} to a {@link KeyRange} expressing the
+ * region's start and end key bounds using Titan-partitioning-friendly
+ * conventions (start inclusive, end exclusive, zero bytes appended where
+ * necessary to make all keys at least 4 bytes long).
+ * <p/>
+ * This method iterates over the entries in its map parameter and performs
+ * the following conditional conversions on its keys. "Require" below means
+ * either a {@link Preconditions} invocation or an assertion. HRegionInfo
+ * sometimes returns start and end keys of zero length; this method replaces
+ * zero length keys with null before doing any of the checks described
+ * below. The parameter map and the values it contains are only read and
+ * never modified.
+ *
+ * <ul>
+ * <li>If an entry's HRegionInfo has null start and end keys, then first
+ * require that the parameter map is a singleton, and then return a
+ * single-entry map whose {@code KeyRange} has start and end buffers that
+ * are both four bytes of zeros.</li>
+ * <li>If the entry has a null end key (but non-null start key), put an
+ * equivalent entry in the result map with a start key identical to the
+ * input, except that zeros are appended to values less than 4 bytes long,
+ * and an end key that is four bytes of zeros.
+ * <li>If the entry has a null start key (but non-null end key), put an
+ * equivalent entry in the result map where the start key is four bytes of
+ * zeros, and the end key has zeros appended, if necessary, to make it at
+ * least 4 bytes long, after which one is added to the padded value in
+ * unsigned 32-bit arithmetic with overflow allowed.</li>
+ * <li>Any entry which matches none of the above criteria results in an
+ * equivalent entry in the returned map, except that zeros are appended to
+ * both keys to make each at least 4 bytes long, and the end key is then
+ * incremented as described in the last bullet point.</li>
+ * </ul>
+ *
+ * After iterating over the parameter map, this method checks that it either
+ * saw no entries with null keys, one entry with a null start key and a
+ * different entry with a null end key, or one entry with both start and end
+ * keys null. If any null keys are observed besides these three cases, the
+ * method will die with a precondition failure.
+ *
+ * @param raw
+ * A map of HRegionInfo and ServerName from HBase
+ * @return Titan-friendly expression of each region's rowkey boundaries
+ */
+ private Map<KeyRange, ServerName> normalizeKeyBounds(NavigableMap<HRegionInfo, ServerName> raw) {
+
+ Map.Entry<HRegionInfo, ServerName> nullStart = null;
+ Map.Entry<HRegionInfo, ServerName> nullEnd = null;
+
+ ImmutableMap.Builder<KeyRange, ServerName> b = ImmutableMap.builder();
+
+ for (Map.Entry<HRegionInfo, ServerName> e : raw.entrySet()) {
+ HRegionInfo regionInfo = e.getKey();
+ byte startKey[] = regionInfo.getStartKey();
+ byte endKey[] = regionInfo.getEndKey();
+
+ if (0 == startKey.length) {
+ startKey = null;
+ logger.trace("Converted zero-length HBase startKey byte array to null");
+ }
+
+ if (0 == endKey.length) {
+ endKey = null;
+ logger.trace("Converted zero-length HBase endKey byte array to null");
+ }
+
+ if (null == startKey && null == endKey) {
+ Preconditions.checkState(1 == raw.size());
+ logger.debug("HBase table {} has a single region {}", tableName, regionInfo);
+ // Choose arbitrary shared value = startKey = endKey
+ return b.put(new KeyRange(FOUR_ZERO_BYTES, FOUR_ZERO_BYTES), e.getValue()).build();
+ } else if (null == startKey) {
+ logger.debug("Found HRegionInfo with null startKey on server {}: {}", e.getValue(), regionInfo);
+ Preconditions.checkState(null == nullStart);
+ nullStart = e;
+ // I thought endBuf would be inclusive from the HBase javadoc, but in practice it is exclusive
+ StaticBuffer endBuf = StaticArrayBuffer.of(zeroExtend(endKey));
+ // Replace null start key with zeroes
+ b.put(new KeyRange(FOUR_ZERO_BYTES, endBuf), e.getValue());
+ } else if (null == endKey) {
+ logger.debug("Found HRegionInfo with null endKey on server {}: {}", e.getValue(), regionInfo);
+ Preconditions.checkState(null == nullEnd);
+ nullEnd = e;
+ // Replace null end key with zeroes
+ b.put(new KeyRange(StaticArrayBuffer.of(zeroExtend(startKey)), FOUR_ZERO_BYTES), e.getValue());
+ } else {
+ Preconditions.checkState(null != startKey);
+ Preconditions.checkState(null != endKey);
+
+ // Convert HBase's inclusive end keys into exclusive Titan end keys
+ StaticBuffer startBuf = StaticArrayBuffer.of(zeroExtend(startKey));
+ StaticBuffer endBuf = StaticArrayBuffer.of(zeroExtend(endKey));
+
+ KeyRange kr = new KeyRange(startBuf, endBuf);
+ b.put(kr, e.getValue());
+ logger.debug("Found HRegionInfo with non-null end and start keys on server {}: {}", e.getValue(), regionInfo);
+ }
+ }
+
+ // Require either no null key bounds or a pair of them
+ Preconditions.checkState(!(null == nullStart ^ null == nullEnd));
+
+ // Check that every key in the result is at least 4 bytes long
+ Map<KeyRange, ServerName> result = b.build();
+ for (KeyRange kr : result.keySet()) {
+ Preconditions.checkState(4 <= kr.getStart().length());
+ Preconditions.checkState(4 <= kr.getEnd().length());
+ }
+
+ return result;
+ }
+
+ /**
+ * If the parameter is shorter than 4 bytes, then create and return a new 4
+ * byte array with the input array's bytes followed by zero bytes. Otherwise
+ * return the parameter.
+ *
+ * @param dataToPad non-null but possibly zero-length byte array
+ * @return either the parameter or a new array
+ */
+ private final byte[] zeroExtend(byte[] dataToPad) {
+ assert null != dataToPad;
+
+ final int targetLength = 4;
+
+ if (targetLength <= dataToPad.length)
+ return dataToPad;
+
+ byte padded[] = new byte[targetLength];
+
+ for (int i = 0; i < dataToPad.length; i++)
+ padded[i] = dataToPad[i];
+
+ for (int i = dataToPad.length; i < padded.length; i++)
+ padded[i] = (byte)0;
+
+ return padded;
+ }
+
+ public static String shortenCfName(String longName) throws PermanentBackendException {
+ final String s;
+ if (SHORT_CF_NAME_MAP.containsKey(longName)) {
+ s = SHORT_CF_NAME_MAP.get(longName);
+ Preconditions.checkNotNull(s);
+ logger.debug("Substituted default CF name \"{}\" with short form \"{}\" to reduce HBase KeyValue size", longName, s);
+ } else {
+ if (SHORT_CF_NAME_MAP.containsValue(longName)) {
+ String fmt = "Must use CF long-form name \"%s\" instead of the short-form name \"%s\" when configured with %s=true";
+ String msg = String.format(fmt, SHORT_CF_NAME_MAP.inverse().get(longName), longName, SHORT_CF_NAMES.getName());
+ throw new PermanentBackendException(msg);
+ }
+ s = longName;
+ logger.debug("Kept default CF name \"{}\" because it has no associated short form", s);
+ }
+ return s;
+ }
+
+ private HTableDescriptor ensureTableExists(String tableName, String initialCFName, int ttlInSeconds) throws BackendException {
+ AdminMask adm = null;
+
+ HTableDescriptor desc;
+
+ try { // Create our table, if necessary
+ adm = getAdminInterface();
+ /*
+ * Some HBase versions/impls respond badly to attempts to create a
+ * table without at least one CF. See #661. Creating a CF along with
+ * the table avoids HBase carping.
+ */
+ if (adm.tableExists(tableName)) {
+ desc = adm.getTableDescriptor(tableName);
+ } else {
+ desc = createTable(tableName, initialCFName, ttlInSeconds, adm);
+ }
+ } catch (IOException e) {
+ throw new TemporaryBackendException(e);
+ } finally {
+ IOUtils.closeQuietly(adm);
+ }
+
+ return desc;
+ }
+
+ private HTableDescriptor createTable(String tableName, String cfName, int ttlInSeconds, AdminMask adm) throws IOException {
+ HTableDescriptor desc = compat.newTableDescriptor(tableName);
+
+ HColumnDescriptor cdesc = new HColumnDescriptor(cfName);
+ setCFOptions(cdesc, ttlInSeconds);
+
+ compat.addColumnFamilyToTableDescriptor(desc, cdesc);
+
+ int count; // total regions to create
+ String src;
+
+ if (MIN_REGION_COUNT <= (count = regionCount)) {
+ src = "region count configuration";
+ } else if (0 < regionsPerServer &&
+ MIN_REGION_COUNT <= (count = regionsPerServer * adm.getEstimatedRegionServerCount())) {
+ src = "ClusterStatus server count";
+ } else {
+ count = -1;
+ src = "default";
+ }
+
+ if (MIN_REGION_COUNT < count) {
+ adm.createTable(desc, getStartKey(count), getEndKey(count), count);
+ logger.debug("Created table {} with region count {} from {}", tableName, count, src);
+ } else {
+ adm.createTable(desc);
+ logger.debug("Created table {} with default start key, end key, and region count", tableName);
+ }
+
+ return desc;
+ }
+
+ /**
+ * This method generates the second argument to
+ * {@link HBaseAdmin#createTable(HTableDescriptor, byte[], byte[], int)}.
+ * <p/>
+ * From the {@code createTable} javadoc:
+ * "The start key specified will become the end key of the first region of
+ * the table, and the end key specified will become the start key of the
+ * last region of the table (the first region has a null start key and
+ * the last region has a null end key)"
+ * <p/>
+ * To summarize, the {@code createTable} argument called "startKey" is
+ * actually the end key of the first region.
+ */
+ private byte[] getStartKey(int regionCount) {
+ ByteBuffer regionWidth = ByteBuffer.allocate(4);
+ regionWidth.putInt((int)(((1L << 32) - 1L) / regionCount)).flip();
+ return StaticArrayBuffer.of(regionWidth).getBytes(0, 4);
+ }
+
+ /**
+ * Companion to {@link #getStartKey(int)}. See its javadoc for details.
+ */
+ private byte[] getEndKey(int regionCount) {
+ ByteBuffer regionWidth = ByteBuffer.allocate(4);
+ regionWidth.putInt((int)(((1L << 32) - 1L) / regionCount * (regionCount - 1))).flip();
+ return StaticArrayBuffer.of(regionWidth).getBytes(0, 4);
+ }
+
+ private void ensureColumnFamilyExists(String tableName, String columnFamily, int ttlInSeconds) throws BackendException {
+ AdminMask adm = null;
+ try {
+ adm = getAdminInterface();
+ HTableDescriptor desc = ensureTableExists(tableName, columnFamily, ttlInSeconds);
+
+ Preconditions.checkNotNull(desc);
+
+ HColumnDescriptor cf = desc.getFamily(columnFamily.getBytes());
+
+ // Create our column family, if necessary
+ if (cf == null) {
+ try {
+ if (!adm.isTableDisabled(tableName)) {
+ adm.disableTable(tableName);
+ }
+ } catch (TableNotEnabledException e) {
+ logger.debug("Table {} already disabled", tableName);
+ } catch (IOException e) {
+ throw new TemporaryBackendException(e);
+ }
+
+ try {
+ HColumnDescriptor cdesc = new HColumnDescriptor(columnFamily);
+
+ setCFOptions(cdesc, ttlInSeconds);
+
+ adm.addColumn(tableName, cdesc);
+
+ logger.debug("Added HBase ColumnFamily {}, waiting for 1 sec. to propogate.", columnFamily);
+
+ adm.enableTable(tableName);
+ } catch (TableNotFoundException ee) {
+ logger.error("TableNotFoundException", ee);
+ throw new PermanentBackendException(ee);
+ } catch (org.apache.hadoop.hbase.TableExistsException ee) {
+ logger.debug("Swallowing exception {}", ee);
+ } catch (IOException ee) {
+ throw new TemporaryBackendException(ee);
+ }
+ }
+ } finally {
+ IOUtils.closeQuietly(adm);
+ }
+ }
+
+ private void setCFOptions(HColumnDescriptor cdesc, int ttlInSeconds) {
+ if (null != compression && !compression.equals(COMPRESSION_DEFAULT))
+ compat.setCompression(cdesc, compression);
+
+ if (ttlInSeconds > 0)
+ cdesc.setTimeToLive(ttlInSeconds);
+
+ cdesc.setDataBlockEncoding(DataBlockEncoding.FAST_DIFF);
+ }
+
+ /**
+ * Convert Titan internal Mutation representation into HBase native commands.
+ *
+ * @param mutations Mutations to convert into HBase commands.
+ * @param putTimestamp The timestamp to use for Put commands.
+ * @param delTimestamp The timestamp to use for Delete commands.
+ * @return Commands sorted by key converted from Titan internal representation.
+ * @throws com.thinkaurelius.titan.diskstorage.PermanentBackendException
+ */
+ private Map<StaticBuffer, Pair<Put, Delete>> convertToCommands(Map<String, Map<StaticBuffer, KCVMutation>> mutations,
+ final long putTimestamp,
+ final long delTimestamp) throws PermanentBackendException {
+ Map<StaticBuffer, Pair<Put, Delete>> commandsPerKey = new HashMap<StaticBuffer, Pair<Put, Delete>>();
+
+ for (Map.Entry<String, Map<StaticBuffer, KCVMutation>> entry : mutations.entrySet()) {
+
+ String cfString = getCfNameForStoreName(entry.getKey());
+ byte[] cfName = cfString.getBytes();
+
+ for (Map.Entry<StaticBuffer, KCVMutation> m : entry.getValue().entrySet()) {
+ byte[] key = m.getKey().as(StaticBuffer.ARRAY_FACTORY);
+ KCVMutation mutation = m.getValue();
+
+ Pair<Put, Delete> commands = commandsPerKey.get(m.getKey());
+
+ if (commands == null) {
+ commands = new Pair<Put, Delete>();
+ commandsPerKey.put(m.getKey(), commands);
+ }
+
+ if (mutation.hasDeletions()) {
+ if (commands.getSecond() == null) {
+ Delete d = new Delete(key);
+ compat.setTimestamp(d, delTimestamp);
+ commands.setSecond(d);
+ }
+
+ for (StaticBuffer b : mutation.getDeletions()) {
+ commands.getSecond().deleteColumns(cfName, b.as(StaticBuffer.ARRAY_FACTORY), delTimestamp);
+ }
+ }
+
+ if (mutation.hasAdditions()) {
+ if (commands.getFirst() == null) {
+ Put p = new Put(key, putTimestamp);
+ commands.setFirst(p);
+ }
+
+ for (Entry e : mutation.getAdditions()) {
+ commands.getFirst().add(cfName,
+ e.getColumnAs(StaticBuffer.ARRAY_FACTORY),
+ putTimestamp,
+ e.getValueAs(StaticBuffer.ARRAY_FACTORY));
+ }
+ }
+ }
+ }
+
+ return commandsPerKey;
+ }
+
+ private String getCfNameForStoreName(String storeName) throws PermanentBackendException {
+ return shortCfNames ? shortenCfName(storeName) : storeName;
+ }
+
+ private void checkConfigDeprecation(com.thinkaurelius.titan.diskstorage.configuration.Configuration config) {
+ if (config.has(GraphDatabaseConfiguration.STORAGE_PORT)) {
+ logger.warn("The configuration property {} is ignored for HBase. Set hbase.zookeeper.property.clientPort in hbase-site.xml or {}.hbase.zookeeper.property.clientPort in Titan's configuration file.",
+ ConfigElement.getPath(GraphDatabaseConfiguration.STORAGE_PORT), ConfigElement.getPath(HBASE_CONFIGURATION_NAMESPACE));
+ }
+ }
+
+ private AdminMask getAdminInterface() {
+ try {
+ return cnx.getAdmin();
+ } catch (IOException e) {
+ throw new TitanException(e);
+ }
+ }
+
+ /**
+ * Similar to {@link Function}, except that the {@code apply} method is allowed
+ * to throw {@link BackendException}.
+ */
+ private static interface BackendFunction<F, T> {
+
+ T apply(F input) throws BackendException;
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseTransaction.java
----------------------------------------------------------------------
diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseTransaction.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseTransaction.java
new file mode 100644
index 0000000..e13593f
--- /dev/null
+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HBaseTransaction.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.hbase;
+
+import com.thinkaurelius.titan.diskstorage.BackendException;
+import com.thinkaurelius.titan.diskstorage.BaseTransactionConfig;
+import com.thinkaurelius.titan.diskstorage.StaticBuffer;
+import com.thinkaurelius.titan.diskstorage.common.AbstractStoreTransaction;
+import com.thinkaurelius.titan.diskstorage.keycolumnvalue.StoreTransaction;
+import com.thinkaurelius.titan.diskstorage.locking.LocalLockMediator;
+import com.thinkaurelius.titan.diskstorage.util.KeyColumn;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+/**
+ * This class overrides and adds nothing compared with
+ * {@link com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction}; however, it creates a transaction type specific
+ * to HBase, which lets us check for user errors like passing a Cassandra
+ * transaction into a HBase method.
+ *
+ * @author Dan LaRocque <da...@hopcount.org>
+ */
+public class HBaseTransaction extends AbstractStoreTransaction {
+
+ private static final Logger log = LoggerFactory.getLogger(HBaseTransaction.class);
+
+ LocalLockMediator<StoreTransaction> llm;
+
+ Set<KeyColumn> keyColumnLocks = new LinkedHashSet<>();
+
+ public HBaseTransaction(final BaseTransactionConfig config, LocalLockMediator<StoreTransaction> llm) {
+ super(config);
+ this.llm = llm;
+ }
+
+ @Override
+ public synchronized void rollback() throws BackendException {
+ super.rollback();
+ log.debug("Rolled back transaction");
+ deleteAllLocks();
+ }
+
+ @Override
+ public synchronized void commit() throws BackendException {
+ super.commit();
+ log.debug("Committed transaction");
+ deleteAllLocks();
+ }
+
+ public void updateLocks(KeyColumn lockID, StaticBuffer expectedValue) {
+ keyColumnLocks.add(lockID);
+ }
+
+ private void deleteAllLocks() {
+ for(KeyColumn kc : keyColumnLocks) {
+ log.debug("Removed lock {} ", kc);
+ llm.unlock(kc, this);
+ }
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection0_98.java
----------------------------------------------------------------------
diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection0_98.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection0_98.java
new file mode 100644
index 0000000..8660644
--- /dev/null
+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection0_98.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.hbase;
+
+import java.io.IOException;
+
+import org.apache.hadoop.hbase.client.HBaseAdmin;
+import org.apache.hadoop.hbase.client.HConnection;
+
+public class HConnection0_98 implements ConnectionMask
+{
+
+ private final HConnection cnx;
+
+ public HConnection0_98(HConnection cnx)
+ {
+ this.cnx = cnx;
+ }
+
+ @Override
+ public TableMask getTable(String name) throws IOException
+ {
+ return new HTable0_98(cnx.getTable(name));
+ }
+
+ @Override
+ public AdminMask getAdmin() throws IOException
+ {
+ return new HBaseAdmin0_98(new HBaseAdmin(cnx));
+ }
+
+ @Override
+ public void close() throws IOException
+ {
+ cnx.close();
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection1_0.java
----------------------------------------------------------------------
diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection1_0.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection1_0.java
new file mode 100644
index 0000000..91e5026
--- /dev/null
+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HConnection1_0.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.hbase;
+
+import java.io.IOException;
+
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Connection;
+import org.apache.hadoop.hbase.client.HBaseAdmin;
+
+public class HConnection1_0 implements ConnectionMask
+{
+
+ private final Connection cnx;
+
+ public HConnection1_0(Connection cnx)
+ {
+ this.cnx = cnx;
+ }
+
+ @Override
+ public TableMask getTable(String name) throws IOException
+ {
+ return new HTable1_0(cnx.getTable(TableName.valueOf(name)));
+ }
+
+ @Override
+ public AdminMask getAdmin() throws IOException
+ {
+ return new HBaseAdmin1_0(new HBaseAdmin(cnx));
+ }
+
+ @Override
+ public void close() throws IOException
+ {
+ cnx.close();
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable0_98.java
----------------------------------------------------------------------
diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable0_98.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable0_98.java
new file mode 100644
index 0000000..b11532a
--- /dev/null
+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable0_98.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.hbase;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.apache.hadoop.hbase.client.Get;
+import org.apache.hadoop.hbase.client.HTableInterface;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.ResultScanner;
+import org.apache.hadoop.hbase.client.Row;
+import org.apache.hadoop.hbase.client.Scan;
+
+public class HTable0_98 implements TableMask
+{
+ private final HTableInterface table;
+
+ public HTable0_98(HTableInterface table)
+ {
+ this.table = table;
+ }
+
+ @Override
+ public ResultScanner getScanner(Scan filter) throws IOException
+ {
+ return table.getScanner(filter);
+ }
+
+ @Override
+ public Result[] get(List<Get> gets) throws IOException
+ {
+ return table.get(gets);
+ }
+
+ @Override
+ public void batch(List<Row> writes, Object[] results) throws IOException, InterruptedException
+ {
+ table.batch(writes, results);
+ table.flushCommits();
+ }
+
+ @Override
+ public void close() throws IOException
+ {
+ table.close();
+ }
+
+ @Override
+ public Object getTableObject() {
+ return table;
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable1_0.java
----------------------------------------------------------------------
diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable1_0.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable1_0.java
new file mode 100644
index 0000000..5c90617
--- /dev/null
+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/HTable1_0.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.hbase;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.apache.hadoop.hbase.client.Get;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.ResultScanner;
+import org.apache.hadoop.hbase.client.Row;
+import org.apache.hadoop.hbase.client.Scan;
+import org.apache.hadoop.hbase.client.Table;
+
+public class HTable1_0 implements TableMask
+{
+ private final Table table;
+
+ public HTable1_0(Table table)
+ {
+ this.table = table;
+ }
+
+ @Override
+ public ResultScanner getScanner(Scan filter) throws IOException
+ {
+ return table.getScanner(filter);
+ }
+
+ @Override
+ public Result[] get(List<Get> gets) throws IOException
+ {
+ return table.get(gets);
+ }
+
+ @Override
+ public void batch(List<Row> writes, Object[] results) throws IOException, InterruptedException
+ {
+ table.batch(writes, results);
+ /* table.flushCommits(); not needed anymore */
+ }
+
+ @Override
+ public void close() throws IOException
+ {
+ table.close();
+ }
+
+ @Override
+ public Object getTableObject() {
+ return table;
+ }
+}
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/TableMask.java
----------------------------------------------------------------------
diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/TableMask.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/TableMask.java
new file mode 100644
index 0000000..54f8743
--- /dev/null
+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/hbase/TableMask.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.hbase;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.List;
+
+import org.apache.hadoop.hbase.client.Get;
+import org.apache.hadoop.hbase.client.Result;
+import org.apache.hadoop.hbase.client.ResultScanner;
+import org.apache.hadoop.hbase.client.Row;
+import org.apache.hadoop.hbase.client.Scan;
+
+/**
+ * This interface hides ABI/API breaking changes that HBase has made to its Table/HTableInterface over the course
+ * of development from 0.94 to 1.0 and beyond.
+ */
+public interface TableMask extends Closeable
+{
+
+ ResultScanner getScanner(Scan filter) throws IOException;
+
+ Result[] get(List<Get> gets) throws IOException;
+
+ void batch(List<Row> writes, Object[] results) throws IOException, InterruptedException;
+
+ Object getTableObject();
+}
http://git-wip-us.apache.org/repos/asf/incubator-atlas/blob/4fa10b6a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/locking/LocalLockMediator.java
----------------------------------------------------------------------
diff --git a/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/locking/LocalLockMediator.java b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/locking/LocalLockMediator.java
new file mode 100644
index 0000000..20c59e1
--- /dev/null
+++ b/graphdb/titan0/src/main/java/com/thinkaurelius/titan/diskstorage/locking/LocalLockMediator.java
@@ -0,0 +1,345 @@
+/*
+ * Copyright 2012-2013 Aurelius LLC
+ * Licensed 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.thinkaurelius.titan.diskstorage.locking;
+
+import com.google.common.base.Preconditions;
+import com.thinkaurelius.titan.diskstorage.util.time.Timepoint;
+import com.thinkaurelius.titan.diskstorage.util.time.TimestampProvider;
+import com.thinkaurelius.titan.diskstorage.locking.consistentkey.ExpectedValueCheckingTransaction;
+import com.thinkaurelius.titan.diskstorage.util.KeyColumn;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.DelayQueue;
+import java.util.concurrent.Delayed;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * This class resolves lock contention between two transactions on the same JVM.
+ * <p/>
+ * This is not just an optimization to reduce network traffic. Locks written by
+ * Titan to a distributed key-value store contain an identifier, the "Rid",
+ * which is unique only to the process level. The Rid can't tell which
+ * transaction in a process holds any given lock. This class prevents two
+ * transactions in a single process from concurrently writing the same lock to a
+ * distributed key-value store.
+ *
+ * @author Dan LaRocque <da...@hopcount.org>
+ */
+
+public class LocalLockMediator<T> {
+
+ private static final Logger log = LoggerFactory
+ .getLogger(LocalLockMediator.class);
+
+ /**
+ * Namespace for which this mediator is responsible
+ *
+ * @see LocalLockMediatorProvider
+ */
+ private final String name;
+
+ private final TimestampProvider times;
+
+ private DelayQueue<ExpirableKeyColumn> expiryQueue = new DelayQueue<>();
+
+ private ExecutorService lockCleanerService = Executors.newFixedThreadPool(1, new ThreadFactory() {
+ @Override
+ public Thread newThread(Runnable runnable) {
+ Thread thread = Executors.defaultThreadFactory().newThread(runnable);
+ thread.setDaemon(true);
+ return thread;
+ }
+ });
+
+
+
+ /**
+ * Maps a ({@code key}, {@code column}) pair to the local transaction
+ * holding a lock on that pair. Values in this map may have already expired
+ * according to {@link AuditRecord#expires}, in which case the lock should
+ * be considered invalid.
+ */
+ private final ConcurrentHashMap<KeyColumn, AuditRecord<T>> locks = new ConcurrentHashMap<KeyColumn, AuditRecord<T>>();
+
+ public LocalLockMediator(String name, TimestampProvider times) {
+ this.name = name;
+ this.times = times;
+
+ Preconditions.checkNotNull(name);
+ Preconditions.checkNotNull(times);
+ lockCleanerService.submit(new LockCleaner());
+ }
+
+ /**
+ * Acquire the lock specified by {@code kc}.
+ * <p/>
+ * <p/>
+ * For any particular key-column, whatever value of {@code requestor} is
+ * passed to this method must also be passed to the associated later call to
+ * {@link #unlock(KeyColumn, ExpectedValueCheckingTransaction)}.
+ * <p/>
+ * If some requestor {@code r} calls this method on a KeyColumn {@code k}
+ * and this method returns true, then subsequent calls to this method by
+ * {@code r} on {@code l} merely attempt to update the {@code expiresAt}
+ * timestamp. This differs from typical lock reentrance: multiple successful
+ * calls to this method do not require an equal number of calls to
+ * {@code #unlock()}. One {@code #unlock()} call is enough, no matter how
+ * many times a {@code requestor} called {@code lock} beforehand. Note that
+ * updating the timestamp may fail, in which case the lock is considered to
+ * have expired and the calling context should assume it no longer holds the
+ * lock specified by {@code kc}.
+ * <p/>
+ * The number of nanoseconds elapsed since the UNIX Epoch is not readily
+ * available within the JVM. When reckoning expiration times, this method
+ * uses the approximation implemented by
+ * {@link com.thinkaurelius.titan.diskstorage.util.NanoTime#getApproxNSSinceEpoch(false)}.
+ * <p/>
+ * The current implementation of this method returns true when given an
+ * {@code expiresAt} argument in the past. Future implementations may return
+ * false instead.
+ *
+ * @param kc lock identifier
+ * @param requestor the object locking {@code kc}
+ * @param expires instant at which this lock will automatically expire
+ * @return true if the lock is acquired, false if it was not acquired
+ */
+ public boolean lock(KeyColumn kc, T requestor, Timepoint expires) {
+ assert null != kc;
+ assert null != requestor;
+
+ AuditRecord<T> audit = new AuditRecord<T>(requestor, expires);
+ AuditRecord<T> inmap = locks.putIfAbsent(kc, audit);
+
+ boolean success = false;
+
+ if (null == inmap) {
+ // Uncontended lock succeeded
+ if (log.isTraceEnabled()) {
+ log.trace("New local lock created: {} namespace={} txn={}",
+ new Object[]{kc, name, requestor});
+ }
+ success = true;
+ } else if (inmap.equals(audit)) {
+ // requestor has already locked kc; update expiresAt
+ success = locks.replace(kc, inmap, audit);
+ if (log.isTraceEnabled()) {
+ if (success) {
+ log.trace(
+ "Updated local lock expiration: {} namespace={} txn={} oldexp={} newexp={}",
+ new Object[]{kc, name, requestor, inmap.expires,
+ audit.expires});
+ } else {
+ log.trace(
+ "Failed to update local lock expiration: {} namespace={} txn={} oldexp={} newexp={}",
+ new Object[]{kc, name, requestor, inmap.expires,
+ audit.expires});
+ }
+ }
+ } else if (0 > inmap.expires.compareTo(times.getTime())) {
+ // the recorded lock has expired; replace it
+ success = locks.replace(kc, inmap, audit);
+ if (log.isTraceEnabled()) {
+ log.trace(
+ "Discarding expired lock: {} namespace={} txn={} expired={}",
+ new Object[]{kc, name, inmap.holder, inmap.expires});
+ }
+ } else {
+ // we lost to a valid lock
+ if (log.isTraceEnabled()) {
+ log.trace(
+ "Local lock failed: {} namespace={} txn={} (already owned by {})",
+ new Object[]{kc, name, requestor, inmap});
+ }
+ }
+
+ if (success) {
+ expiryQueue.add(new ExpirableKeyColumn(kc, expires));
+ }
+ return success;
+ }
+
+ /**
+ * Release the lock specified by {@code kc} and which was previously
+ * locked by {@code requestor}, if it is possible to release it.
+ *
+ * @param kc lock identifier
+ * @param requestor the object which previously locked {@code kc}
+ */
+ public boolean unlock(KeyColumn kc, T requestor) {
+
+ if (!locks.containsKey(kc)) {
+ log.info("Local unlock failed: no locks found for {}", kc);
+ return false;
+ }
+
+ AuditRecord<T> unlocker = new AuditRecord<T>(requestor, null);
+
+ AuditRecord<T> holder = locks.get(kc);
+
+ if (!holder.equals(unlocker)) {
+ log.error("Local unlock of {} by {} failed: it is held by {}",
+ new Object[]{kc, unlocker, holder});
+ return false;
+ }
+
+ boolean removed = locks.remove(kc, unlocker);
+
+ if (removed) {
+ expiryQueue.remove(kc);
+ if (log.isTraceEnabled()) {
+ log.trace("Local unlock succeeded: {} namespace={} txn={}",
+ new Object[]{kc, name, requestor});
+ }
+ } else {
+ log.warn("Local unlock warning: lock record for {} disappeared "
+ + "during removal; this suggests the lock either expired "
+ + "while we were removing it, or that it was erroneously "
+ + "unlocked multiple times.", kc);
+ }
+
+ // Even if !removed, we're finished unlocking, so return true
+ return true;
+ }
+
+ public String toString() {
+ return "LocalLockMediator [" + name + ", ~" + locks.size()
+ + " current locks]";
+ }
+
+ /**
+ * A record containing the local transaction that holds a lock and the
+ * lock's expiration time.
+ */
+ private static class AuditRecord<T> {
+
+ /**
+ * The local transaction that holds/held the lock.
+ */
+ private final T holder;
+ /**
+ * The expiration time of a the lock.
+ */
+ private final Timepoint expires;
+ /**
+ * Cached hashCode.
+ */
+ private int hashCode;
+
+ private AuditRecord(T holder, Timepoint expires) {
+ this.holder = holder;
+ this.expires = expires;
+ }
+
+ /**
+ * This implementation depends only on the lock holder and not on the
+ * lock expiration time.
+ */
+ @Override
+ public int hashCode() {
+ if (0 == hashCode)
+ hashCode = holder.hashCode();
+
+ return hashCode;
+ }
+
+ /**
+ * This implementation depends only on the lock holder and not on the
+ * lock expiration time.
+ */
+ @Override
+ public boolean equals(Object obj) {
+ if (this == obj)
+ return true;
+ if (obj == null)
+ return false;
+ if (getClass() != obj.getClass())
+ return false;
+ /*
+ * This warning suppression is harmless because we are only going to
+ * call other.holder.equals(...), and since equals(...) is part of
+ * Object, it is guaranteed to be defined no matter the concrete
+ * type of parameter T.
+ */
+ @SuppressWarnings("rawtypes")
+ AuditRecord other = (AuditRecord) obj;
+ if (holder == null) {
+ if (other.holder != null)
+ return false;
+ } else if (!holder.equals(other.holder))
+ return false;
+ return true;
+ }
+
+ @Override
+ public String toString() {
+ return "AuditRecord [txn=" + holder + ", expires=" + expires + "]";
+ }
+
+ }
+
+ private class LockCleaner implements Runnable {
+
+ @Override
+ public void run() {
+ try {
+ while (true) {
+ log.debug("Lock Cleaner service started");
+ ExpirableKeyColumn lock = expiryQueue.take();
+ log.debug("Expiring key column " + lock.getKeyColumn());
+ locks.remove(lock.getKeyColumn());
+ }
+ } catch (InterruptedException e) {
+ log.debug("Received interrupt. Exiting");
+ }
+ }
+ }
+
+ private static class ExpirableKeyColumn implements Delayed {
+
+ private Timepoint expiryTime;
+ private KeyColumn kc;
+
+ public ExpirableKeyColumn(KeyColumn keyColumn, Timepoint expiryTime) {
+ this.kc = keyColumn;
+ this.expiryTime = expiryTime;
+ }
+
+ @Override
+ public long getDelay(TimeUnit unit) {
+ return expiryTime.getTimestamp(TimeUnit.NANOSECONDS);
+ }
+
+ @Override
+ public int compareTo(Delayed o) {
+ if (this.expiryTime.getTimestamp(TimeUnit.NANOSECONDS) < ((ExpirableKeyColumn) o).expiryTime.getTimestamp(TimeUnit.NANOSECONDS)) {
+ return -1;
+ }
+ if (this.expiryTime.getTimestamp(TimeUnit.NANOSECONDS) > ((ExpirableKeyColumn) o).expiryTime.getTimestamp(TimeUnit.NANOSECONDS)) {
+ return 1;
+ }
+ return 0;
+ }
+
+ public KeyColumn getKeyColumn() {
+ return kc;
+ }
+ }
+}