idmanager/idmanager-impl/src/main/java/org/opendaylight/genius/idmanager/IdManager.java

   1 /*
   2  * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.genius.idmanager;
   9
  10 import static java.util.Comparator.comparing;
  11 import static java.util.stream.Collectors.toCollection;
  12 import static org.opendaylight.controller.md.sal.binding.api.WriteTransaction.CREATE_MISSING_PARENTS;
  13 import static org.opendaylight.genius.infra.Datastore.CONFIGURATION;
  14
  15 import com.google.common.base.Optional;
  16 import com.google.common.util.concurrent.Futures;
  17 import com.google.common.util.concurrent.ListenableFuture;
  18 import com.google.common.util.concurrent.MoreExecutors;
  19 import java.util.ArrayList;
  20 import java.util.Collections;
  21 import java.util.HashMap;
  22 import java.util.LinkedList;
  23 import java.util.List;
  24 import java.util.Map;
  25 import java.util.Timer;
  26 import java.util.TimerTask;
  27 import java.util.concurrent.CompletableFuture;
  28 import java.util.concurrent.ConcurrentHashMap;
  29 import java.util.concurrent.ConcurrentMap;
  30 import java.util.concurrent.CountDownLatch;
  31 import java.util.concurrent.ExecutionException;
  32 import java.util.concurrent.TimeUnit;
  33 import javax.annotation.PostConstruct;
  34 import javax.annotation.PreDestroy;
  35 import javax.inject.Inject;
  36 import javax.inject.Singleton;
  37
  38 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  39 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  40 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  41 import org.opendaylight.daexim.DataImportBootReady;
  42 import org.opendaylight.genius.datastoreutils.ExpectedDataObjectNotFoundException;
  43 import org.opendaylight.genius.datastoreutils.SingleTransactionDataBroker;
  44 import org.opendaylight.genius.idmanager.ReleasedIdHolder.DelayedIdEntry;
  45 import org.opendaylight.genius.idmanager.api.IdManagerMonitor;
  46 import org.opendaylight.genius.idmanager.jobs.CleanUpJob;
  47 import org.opendaylight.genius.idmanager.jobs.IdHolderSyncJob;
  48 import org.opendaylight.genius.idmanager.jobs.LocalPoolCreateJob;
  49 import org.opendaylight.genius.idmanager.jobs.LocalPoolDeleteJob;
  50 import org.opendaylight.genius.idmanager.jobs.UpdateIdEntryJob;
  51 import org.opendaylight.genius.infra.Datastore.Configuration;
  52 import org.opendaylight.genius.infra.ManagedNewTransactionRunner;
  53 import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl;
  54 import org.opendaylight.genius.infra.TypedReadWriteTransaction;
  55 import org.opendaylight.genius.infra.TypedWriteTransaction;
  56 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
  57 import org.opendaylight.serviceutils.tools.mdsal.rpc.FutureRpcResults;
  58 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdInput;
  59 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdOutput;
  60 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdOutputBuilder;
  61 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdRangeInput;
  62 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdRangeOutput;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdRangeOutputBuilder;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolInput;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolOutput;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolOutputBuilder;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.DeleteIdPoolInput;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.DeleteIdPoolOutput;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdPools;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdInput;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdOutput;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.IdPool;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.IdPoolBuilder;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.IdPoolKey;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.AvailableIdsHolder;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.AvailableIdsHolderBuilder;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.ChildPools;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.IdEntries;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.ReleasedIdsHolder;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.ReleasedIdsHolderBuilder;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.released.ids.DelayedIdEntries;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.LockManagerService;
  84 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  85 import org.opendaylight.yangtools.yang.common.OperationFailedException;
  86 import org.opendaylight.yangtools.yang.common.RpcResult;
  87 import org.ops4j.pax.cdi.api.OsgiService;
  88 import org.slf4j.Logger;
  89 import org.slf4j.LoggerFactory;
  90
  91 @Singleton
  92 public class IdManager implements IdManagerService, IdManagerMonitor {
  93
  94     private static final Logger LOG = LoggerFactory.getLogger(IdManager.class);
  95     private static final long DEFAULT_IDLE_TIME = 24 * 60 * 60;
  96
  97     private final DataBroker broker;
  98     private final ManagedNewTransactionRunner txRunner;
  99     private final SingleTransactionDataBroker singleTxDB;
 100     private final LockManagerService lockManager;
 101     private final IdUtils idUtils;
 102     private final JobCoordinator jobCoordinator;
 103
 104     private final ConcurrentMap<String, IdLocalPool> localPool;
 105     private final Timer cleanJobTimer = new Timer();
 106
 107     @Inject
 108     public IdManager(DataBroker db, LockManagerService lockManager, IdUtils idUtils,
 109             @OsgiService DataImportBootReady dataImportBootReady, JobCoordinator jobCoordinator)
 110                     throws ReadFailedException {
 111         this.broker = db;
 112         this.txRunner = new ManagedNewTransactionRunnerImpl(db);
 113         this.singleTxDB = new SingleTransactionDataBroker(db);
 114         this.lockManager = lockManager;
 115         this.idUtils = idUtils;
 116         this.jobCoordinator = jobCoordinator;
 117
 118         // NB: We do not "use" the DataImportBootReady, but it's presence in the OSGi
 119         // Service Registry is the required "signal" that the Daexim "import on boot"
 120         // has fully completed (which we want to wait for).  Therefore, making this
 121         // dependent on that defers the Blueprint initialization, as we'd like to,
 122         // so that we do not start giving out new IDs before an import went in.
 123         // Thus, please DO NOT remove the DataImportBootReady argument, even if
 124         // it appears to be (is) un-used from a Java code PoV!
 125
 126         this.localPool = new ConcurrentHashMap<>();
 127         populateCache();
 128     }
 129
 130     @Override
 131     public Map<String, String> getLocalPoolsDetails() {
 132         Map<String, String> map = new HashMap<>();
 133         localPool.forEach((key, value) -> map.put(key, value.toString()));
 134         return map;
 135     }
 136
 137     @PostConstruct
 138     public void start() {
 139         LOG.info("{} start", getClass().getSimpleName());
 140     }
 141
 142     @PreDestroy
 143     public void close() {
 144         cleanJobTimer.cancel();
 145
 146         LOG.info("{} close", getClass().getSimpleName());
 147     }
 148
 149     private void populateCache() throws ReadFailedException {
 150         // If IP changes during reboot, then there will be orphaned child pools.
 151         InstanceIdentifier<IdPools> idPoolsInstance = idUtils.getIdPools();
 152         Optional<IdPools> idPoolsOptional =
 153                 singleTxDB.syncReadOptional(LogicalDatastoreType.CONFIGURATION, idPoolsInstance);
 154         if (!idPoolsOptional.isPresent()) {
 155             return;
 156         }
 157         IdPools idPools = idPoolsOptional.get();
 158         List<IdPool> idPoolList = idPools.getIdPool();
 159         idPoolList
 160                 .stream()
 161                 .filter(idPool -> idPool.getParentPoolName() != null
 162                         && !idPool.getParentPoolName().isEmpty()
 163                         && idUtils.getLocalPoolName(idPool.getParentPoolName())
 164                                 .equals(idPool.getPoolName()))
 165                 .forEach(
 166                     idPool -> updateLocalIdPoolCache(idPool,
 167                         idPool.getParentPoolName()));
 168     }
 169
 170     public boolean updateLocalIdPoolCache(IdPool idPool, String parentPoolName) {
 171         AvailableIdsHolder availableIdsHolder = idPool.getAvailableIdsHolder();
 172         AvailableIdHolder availableIdHolder = new AvailableIdHolder(idUtils, availableIdsHolder.getStart(),
 173                 availableIdsHolder.getEnd());
 174         availableIdHolder.setCur(availableIdsHolder.getCursor());
 175         ReleasedIdsHolder releasedIdsHolder = idPool.getReleasedIdsHolder();
 176         ReleasedIdHolder releasedIdHolder = new ReleasedIdHolder(idUtils, releasedIdsHolder.getDelayedTimeSec());
 177         releasedIdHolder.setAvailableIdCount(releasedIdsHolder.getAvailableIdCount());
 178         List<DelayedIdEntries> delayedEntries = releasedIdsHolder.getDelayedIdEntries();
 179         List<DelayedIdEntry> delayedIdEntryInCache = delayedEntries
 180                 .stream()
 181                 .map(delayedIdEntry -> new DelayedIdEntry(delayedIdEntry
 182                         .getId(), delayedIdEntry.getReadyTimeSec()))
 183                 .sorted(comparing(DelayedIdEntry::getReadyTimeSec))
 184                 .collect(toCollection(ArrayList::new));
 185
 186         releasedIdHolder.replaceDelayedEntries(delayedIdEntryInCache);
 187
 188         IdLocalPool idLocalPool = new IdLocalPool(idUtils, idPool.getPoolName());
 189         idLocalPool.setAvailableIds(availableIdHolder);
 190         idLocalPool.setReleasedIds(releasedIdHolder);
 191         localPool.put(parentPoolName, idLocalPool);
 192         if (LOG.isDebugEnabled()) {
 193             LOG.debug("Populating cache for {} with {}", idLocalPool.getPoolName(), idLocalPool);
 194         }
 195         return true;
 196     }
 197
 198     @Override
 199     public ListenableFuture<RpcResult<CreateIdPoolOutput>> createIdPool(CreateIdPoolInput input) {
 200         LOG.info("createIdPool called with input {}", input);
 201         long low = input.getLow();
 202         long high = input.getHigh();
 203         long blockSize = idUtils.computeBlockSize(low, high);
 204         return FutureRpcResults.fromListenableFuture(LOG, "createIdPool", input, () -> {
 205             String poolName = input.getPoolName().intern();
 206             try {
 207                 idUtils.lock(lockManager, poolName);
 208                 return Futures.transform(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, confTx -> {
 209                     IdPool idPool = createGlobalPool(confTx, poolName, low, high, blockSize);
 210                     String localPoolName = idUtils.getLocalPoolName(poolName);
 211                     IdLocalPool idLocalPool = localPool.get(poolName);
 212                     if (idLocalPool == null) {
 213                         createLocalPool(confTx, localPoolName, idPool);
 214                         idUtils.updateChildPool(confTx, idPool.getPoolName(), localPoolName);
 215                     }
 216                 }), unused -> new CreateIdPoolOutputBuilder().build(), MoreExecutors.directExecutor());
 217             } finally {
 218                 idUtils.unlock(lockManager, poolName);
 219             }
 220         }).build();
 221     }
 222
 223     @Override
 224     public ListenableFuture<RpcResult<AllocateIdOutput>> allocateId(AllocateIdInput input) {
 225         String idKey = input.getIdKey();
 226         String poolName = input.getPoolName();
 227         return FutureRpcResults.fromBuilder(LOG, "allocateId", input, () -> {
 228             String localPoolName = idUtils.getLocalPoolName(poolName);
 229             // allocateIdFromLocalPool method returns a list of IDs with one element. This element is obtained by get(0)
 230             long newIdValue = allocateIdFromLocalPool(poolName, localPoolName, idKey, 1).get(0);
 231             return new AllocateIdOutputBuilder().setIdValue(newIdValue);
 232         }).onFailure(e -> completeExceptionallyIfPresent(poolName, idKey, e)).build();
 233     }
 234
 235     private void completeExceptionallyIfPresent(String poolName, String idKey, Throwable exception) {
 236         CompletableFuture<List<Long>> completableFuture =
 237                 idUtils.removeAllocatedIds(idUtils.getUniqueKey(poolName, idKey));
 238         if (completableFuture != null) {
 239             completableFuture.completeExceptionally(exception);
 240         }
 241     }
 242
 243     @Override
 244     public ListenableFuture<RpcResult<AllocateIdRangeOutput>> allocateIdRange(AllocateIdRangeInput input) {
 245         String idKey = input.getIdKey();
 246         String poolName = input.getPoolName();
 247         long size = input.getSize();
 248         String localPoolName = idUtils.getLocalPoolName(poolName);
 249         AllocateIdRangeOutputBuilder output = new AllocateIdRangeOutputBuilder();
 250         return FutureRpcResults.fromBuilder(LOG, "allocateIdRange", input, () -> {
 251             List<Long> newIdValuesList = allocateIdFromLocalPool(poolName, localPoolName, idKey, size);
 252             Collections.sort(newIdValuesList);
 253             output.setIdValues(newIdValuesList);
 254             return output;
 255         }).onFailure(e -> completeExceptionallyIfPresent(poolName, idKey, e)).build();
 256     }
 257
 258     @Override
 259     public ListenableFuture<RpcResult<DeleteIdPoolOutput>> deleteIdPool(DeleteIdPoolInput input) {
 260         return FutureRpcResults.fromListenableFuture(LOG, "deleteIdPool", input, () -> {
 261             String poolName = input.getPoolName().intern();
 262             InstanceIdentifier<IdPool> idPoolToBeDeleted = idUtils.getIdPoolInstance(poolName);
 263             synchronized (poolName) {
 264                 IdPool idPool = singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, idPoolToBeDeleted);
 265                 List<ChildPools> childPoolList = idPool.getChildPools();
 266                 if (childPoolList != null) {
 267                     childPoolList.forEach(childPool -> deletePool(childPool.getChildPoolName()));
 268                 }
 269                 singleTxDB.syncDelete(LogicalDatastoreType.CONFIGURATION, idPoolToBeDeleted);
 270             }
 271             // TODO return the Future from a TBD asyncDelete instead.. BUT check that all callers @CheckReturnValue
 272             return Futures.immediateFuture((DeleteIdPoolOutput) null);
 273         }).build();
 274     }
 275
 276     @Override
 277     public ListenableFuture<RpcResult<ReleaseIdOutput>> releaseId(ReleaseIdInput input) {
 278         String poolName = input.getPoolName();
 279         String idKey = input.getIdKey();
 280         String uniqueKey = idUtils.getUniqueKey(poolName, idKey);
 281         return FutureRpcResults.fromListenableFuture(LOG, "releaseId", input, () -> {
 282             idUtils.lock(lockManager, uniqueKey);
 283             releaseIdFromLocalPool(poolName, idUtils.getLocalPoolName(poolName), idKey);
 284             // TODO return the Future from releaseIdFromLocalPool() instead.. check all callers @CheckReturnValue
 285             return Futures.immediateFuture((ReleaseIdOutput) null);
 286         }).onFailureLogLevel(org.opendaylight.serviceutils.tools.mdsal.rpc.FutureRpcResults.LogLevel.NONE)
 287                 .onFailure(e -> {
 288                     if (e instanceof IdDoesNotExistException) {
 289                         // Do not log full stack trace in case ID does not exist
 290                         LOG.error("RPC releaseId() failed due to IdDoesNotExistException; input = {}", input);
 291                     } else {
 292                         // But for all other cases do:
 293                         LOG.error("RPC releaseId() failed; input = {}", input, e);
 294                     }
 295                     idUtils.unlock(lockManager, uniqueKey);
 296                 }).build();
 297     }
 298
 299     private List<Long> allocateIdFromLocalPool(String parentPoolName, String localPoolName,
 300             String idKey, long size) throws OperationFailedException, IdManagerException {
 301         LOG.debug("Allocating id from local pool {}. Parent pool {}. Idkey {}", localPoolName, parentPoolName, idKey);
 302         String uniqueIdKey = idUtils.getUniqueKey(parentPoolName, idKey);
 303         CompletableFuture<List<Long>> futureIdValues = new CompletableFuture<>();
 304         CompletableFuture<List<Long>> existingFutureIdValue =
 305                 idUtils.putAllocatedIdsIfAbsent(uniqueIdKey, futureIdValues);
 306         if (existingFutureIdValue != null) {
 307             try {
 308                 return existingFutureIdValue.get();
 309             } catch (InterruptedException | ExecutionException e) {
 310                 LOG.warn("Could not obtain id from existing futureIdValue for idKey {} and pool {}.",
 311                         idKey, parentPoolName);
 312                 throw new IdManagerException(e.getMessage(), e);
 313             }
 314         }
 315         try {
 316             List<Long> newIdValuesList = checkForIdInIdEntries(parentPoolName, idKey, uniqueIdKey, futureIdValues,
 317                     false);
 318             if (!newIdValuesList.isEmpty()) {
 319                 return newIdValuesList;
 320             }
 321             //This get will not help in concurrent reads. Hence the same read needs to be done again.
 322             IdLocalPool localIdPool = getOrCreateLocalIdPool(parentPoolName, localPoolName);
 323             LOG.debug("Got pool {}", localIdPool);
 324             long newIdValue = -1;
 325             localPoolName = localPoolName.intern();
 326             if (size == 1) {
 327                 newIdValue = getIdFromLocalPoolCache(localIdPool, parentPoolName);
 328                 newIdValuesList.add(newIdValue);
 329             } else {
 330                 getRangeOfIds(parentPoolName, localPoolName, size, newIdValuesList, localIdPool, newIdValue);
 331             }
 332             LOG.debug("The newIdValues {} for the idKey {}", newIdValuesList, idKey);
 333             idUtils.putReleaseIdLatch(uniqueIdKey, new CountDownLatch(1));
 334             UpdateIdEntryJob job = new UpdateIdEntryJob(parentPoolName, localPoolName, idKey, newIdValuesList, txRunner,
 335                     idUtils, lockManager);
 336             jobCoordinator.enqueueJob(parentPoolName, job, IdUtils.RETRY_COUNT);
 337             futureIdValues.complete(newIdValuesList);
 338             return newIdValuesList;
 339         } catch (OperationFailedException | IdManagerException e) {
 340             idUtils.unlock(lockManager, uniqueIdKey);
 341             throw e;
 342         }
 343     }
 344
 345     private Long getIdFromLocalPoolCache(IdLocalPool localIdPool, String parentPoolName)
 346             throws IdManagerException {
 347         while (true) {
 348             IdHolder availableIds = localIdPool.getAvailableIds();
 349             if (availableIds != null) {
 350                 Optional<Long> availableId = availableIds.allocateId();
 351                 if (availableId.isPresent()) {
 352                     IdHolderSyncJob poolSyncJob =
 353                             new IdHolderSyncJob(localIdPool.getPoolName(), localIdPool.getAvailableIds(), txRunner,
 354                                     idUtils);
 355                     jobCoordinator.enqueueJob(localIdPool.getPoolName(), poolSyncJob, IdUtils.RETRY_COUNT);
 356                     return availableId.get();
 357                 }
 358             }
 359             IdHolder releasedIds = localIdPool.getReleasedIds();
 360             Optional<Long> releasedId = releasedIds.allocateId();
 361             if (releasedId.isPresent()) {
 362                 IdHolderSyncJob poolSyncJob =
 363                         new IdHolderSyncJob(localIdPool.getPoolName(), localIdPool.getReleasedIds(), txRunner,
 364                                 idUtils);
 365                 jobCoordinator.enqueueJob(localIdPool.getPoolName(), poolSyncJob, IdUtils.RETRY_COUNT);
 366                 return releasedId.get();
 367             }
 368             long idCount = getIdBlockFromParentPool(parentPoolName, localIdPool);
 369             if (idCount <= 0) {
 370                 if (LOG.isDebugEnabled()) {
 371                     LOG.debug("Unable to allocate Id block from global pool {}", parentPoolName);
 372                 }
 373                 throw new IdManagerException(String.format("Ids exhausted for pool : %s", parentPoolName));
 374             }
 375         }
 376     }
 377
 378     /**
 379      * Changes made to availableIds and releasedIds will not be persisted to the datastore.
 380      */
 381     private long getIdBlockFromParentPool(String parentPoolName, IdLocalPool localIdPool)
 382             throws IdManagerException {
 383         if (LOG.isDebugEnabled()) {
 384             LOG.debug("Allocating block of id from parent pool {}", parentPoolName);
 385         }
 386         InstanceIdentifier<IdPool> idPoolInstanceIdentifier = idUtils.getIdPoolInstance(parentPoolName);
 387         parentPoolName = parentPoolName.intern();
 388         idUtils.lock(lockManager, parentPoolName);
 389         try {
 390             // Check if the childpool already got id block.
 391             long availableIdCount =
 392                     localIdPool.getAvailableIds().getAvailableIdCount()
 393                             + localIdPool.getReleasedIds().getAvailableIdCount();
 394             if (availableIdCount > 0) {
 395                 return availableIdCount;
 396             }
 397             return txRunner.applyWithNewReadWriteTransactionAndSubmit(CONFIGURATION, confTx -> {
 398                 Optional<IdPool> parentIdPool = confTx.read(idPoolInstanceIdentifier).get();
 399                 if (parentIdPool.isPresent()) {
 400                     return allocateIdBlockFromParentPool(localIdPool, parentIdPool.get(), confTx);
 401                 } else {
 402                     throw new ExpectedDataObjectNotFoundException(LogicalDatastoreType.CONFIGURATION,
 403                             idPoolInstanceIdentifier);
 404                 }
 405             }).get();
 406         } catch (InterruptedException | ExecutionException e) {
 407             throw new IdManagerException("Error getting id block from parent pool", e);
 408         } finally {
 409             idUtils.unlock(lockManager, parentPoolName);
 410         }
 411     }
 412
 413     private long allocateIdBlockFromParentPool(IdLocalPool localPoolCache, IdPool parentIdPool,
 414             TypedWriteTransaction<Configuration> confTx)
 415             throws OperationFailedException, IdManagerException {
 416         long idCount;
 417         ReleasedIdsHolderBuilder releasedIdsBuilderParent = IdUtils.getReleaseIdsHolderBuilder(parentIdPool);
 418         while (true) {
 419             idCount = allocateIdBlockFromAvailableIdsHolder(localPoolCache, parentIdPool, confTx);
 420             if (idCount > 0) {
 421                 return idCount;
 422             }
 423             idCount = allocateIdBlockFromReleasedIdsHolder(localPoolCache, releasedIdsBuilderParent, parentIdPool,
 424                     confTx);
 425             if (idCount > 0) {
 426                 return idCount;
 427             }
 428             idCount = getIdsFromOtherChildPools(releasedIdsBuilderParent, parentIdPool);
 429             if (idCount <= 0) {
 430                 if (LOG.isDebugEnabled()) {
 431                     LOG.debug("Unable to allocate Id block from global pool");
 432                 }
 433                 throw new IdManagerException(String.format("Ids exhausted for pool : %s", parentIdPool.getPoolName()));
 434             }
 435         }
 436     }
 437
 438     private long getIdsFromOtherChildPools(ReleasedIdsHolderBuilder releasedIdsBuilderParent, IdPool parentIdPool)
 439             throws OperationFailedException {
 440         List<ChildPools> childPoolsList = parentIdPool.getChildPools();
 441         // Sorting the child pools on last accessed time so that the pool that
 442         // was not accessed for a long time comes first.
 443         childPoolsList.sort(comparing(ChildPools::getLastAccessTime));
 444         long currentTime = System.currentTimeMillis() / 1000;
 445         for (ChildPools childPools : childPoolsList) {
 446             if (childPools.getLastAccessTime() + DEFAULT_IDLE_TIME > currentTime) {
 447                 break;
 448             }
 449             if (!childPools.getChildPoolName().equals(idUtils.getLocalPoolName(parentIdPool.getPoolName()))) {
 450                 InstanceIdentifier<IdPool> idPoolInstanceIdentifier = idUtils
 451                         .getIdPoolInstance(childPools.getChildPoolName());
 452                 IdPool otherChildPool =
 453                         singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, idPoolInstanceIdentifier);
 454                 ReleasedIdsHolderBuilder releasedIds = IdUtils.getReleaseIdsHolderBuilder(otherChildPool);
 455
 456                 List<DelayedIdEntries> delayedIdEntriesChild = releasedIds.getDelayedIdEntries();
 457                 List<DelayedIdEntries> delayedIdEntriesParent = releasedIdsBuilderParent.getDelayedIdEntries();
 458                 if (delayedIdEntriesParent == null) {
 459                     delayedIdEntriesParent = new LinkedList<>();
 460                 }
 461                 delayedIdEntriesParent.addAll(delayedIdEntriesChild);
 462                 delayedIdEntriesChild.clear();
 463
 464                 AvailableIdsHolderBuilder availableIds = idUtils.getAvailableIdsHolderBuilder(otherChildPool);
 465                 while (idUtils.isIdAvailable(availableIds)) {
 466                     long cursor = availableIds.getCursor() + 1;
 467                     delayedIdEntriesParent.add(idUtils.createDelayedIdEntry(cursor, currentTime));
 468                     availableIds.setCursor(cursor);
 469                 }
 470
 471                 long totalAvailableIdCount = releasedIds.getDelayedIdEntries().size()
 472                         + idUtils.getAvailableIdsCount(availableIds);
 473                 long count = releasedIdsBuilderParent.getAvailableIdCount() + totalAvailableIdCount;
 474                 releasedIdsBuilderParent.setDelayedIdEntries(delayedIdEntriesParent).setAvailableIdCount(count);
 475                 singleTxDB.syncUpdate(LogicalDatastoreType.CONFIGURATION, idPoolInstanceIdentifier,
 476                         new IdPoolBuilder().withKey(new IdPoolKey(otherChildPool.getPoolName()))
 477                                 .setAvailableIdsHolder(availableIds.build()).setReleasedIdsHolder(releasedIds.build())
 478                                 .build());
 479                 return totalAvailableIdCount;
 480             }
 481         }
 482         return 0;
 483     }
 484
 485     private long allocateIdBlockFromReleasedIdsHolder(IdLocalPool localIdPool,
 486             ReleasedIdsHolderBuilder releasedIdsBuilderParent, IdPool parentIdPool,
 487             TypedWriteTransaction<Configuration> confTx) {
 488         if (releasedIdsBuilderParent.getAvailableIdCount() == 0) {
 489             LOG.debug("Ids unavailable in releasedIds of parent pool {}", parentIdPool);
 490             return 0;
 491         }
 492         List<DelayedIdEntries> delayedIdEntriesParent = releasedIdsBuilderParent.getDelayedIdEntries();
 493         int idCount = Math.min(delayedIdEntriesParent.size(), parentIdPool.getBlockSize());
 494         List<DelayedIdEntries> idEntriesToBeRemoved = delayedIdEntriesParent.subList(0, idCount);
 495         ReleasedIdHolder releasedIds = (ReleasedIdHolder) localIdPool.getReleasedIds();
 496         List<DelayedIdEntry> delayedIdEntriesLocalCache = releasedIds.getDelayedEntries();
 497         List<DelayedIdEntry> delayedIdEntriesFromParentPool = idEntriesToBeRemoved
 498                 .stream()
 499                 .map(delayedIdEntry -> new DelayedIdEntry(delayedIdEntry
 500                         .getId(), delayedIdEntry.getReadyTimeSec()))
 501                 .sorted(comparing(DelayedIdEntry::getReadyTimeSec))
 502                 .collect(toCollection(ArrayList::new));
 503         delayedIdEntriesFromParentPool.addAll(delayedIdEntriesLocalCache);
 504         releasedIds.replaceDelayedEntries(delayedIdEntriesFromParentPool);
 505         releasedIds.setAvailableIdCount(releasedIds.getAvailableIdCount() + idCount);
 506         localIdPool.setReleasedIds(releasedIds);
 507         delayedIdEntriesParent.removeAll(idEntriesToBeRemoved);
 508         releasedIdsBuilderParent.setDelayedIdEntries(delayedIdEntriesParent);
 509         InstanceIdentifier<ReleasedIdsHolder> releasedIdsHolderInstanceIdentifier = InstanceIdentifier
 510                 .builder(IdPools.class).child(IdPool.class,
 511                         new IdPoolKey(parentIdPool.getPoolName())).child(ReleasedIdsHolder.class).build();
 512         releasedIdsBuilderParent.setAvailableIdCount(releasedIdsBuilderParent.getAvailableIdCount() - idCount);
 513         LOG.debug("Allocated {} ids from releasedIds of parent pool {}", idCount, parentIdPool);
 514         confTx.merge(releasedIdsHolderInstanceIdentifier, releasedIdsBuilderParent.build(), CREATE_MISSING_PARENTS);
 515         return idCount;
 516     }
 517
 518     private long allocateIdBlockFromAvailableIdsHolder(IdLocalPool localIdPool, IdPool parentIdPool,
 519             TypedWriteTransaction<Configuration> confTx) {
 520         long idCount = 0;
 521         AvailableIdsHolderBuilder availableIdsBuilderParent = idUtils.getAvailableIdsHolderBuilder(parentIdPool);
 522         long end = availableIdsBuilderParent.getEnd();
 523         long cur = availableIdsBuilderParent.getCursor();
 524         if (!idUtils.isIdAvailable(availableIdsBuilderParent)) {
 525             if (LOG.isDebugEnabled()) {
 526                 LOG.debug("Ids exhausted in parent pool {}", parentIdPool);
 527             }
 528             return idCount;
 529         }
 530         // Update availableIdsHolder of Local Pool
 531         idCount = Math.min(end - cur, parentIdPool.getBlockSize());
 532         AvailableIdHolder availableIds = new AvailableIdHolder(idUtils, cur + 1, cur + idCount);
 533         localIdPool.setAvailableIds(availableIds);
 534         // Update availableIdsHolder of Global Pool
 535         InstanceIdentifier<AvailableIdsHolder> availableIdsHolderInstanceIdentifier = InstanceIdentifier
 536                 .builder(IdPools.class).child(IdPool.class,
 537                         new IdPoolKey(parentIdPool.getPoolName())).child(AvailableIdsHolder.class).build();
 538         availableIdsBuilderParent.setCursor(cur + idCount);
 539         if (LOG.isDebugEnabled()) {
 540             LOG.debug("Allocated {} ids from availableIds of global pool {}", idCount, parentIdPool);
 541         }
 542         confTx.merge(availableIdsHolderInstanceIdentifier, availableIdsBuilderParent.build(), CREATE_MISSING_PARENTS);
 543         return idCount;
 544     }
 545
 546     private void releaseIdFromLocalPool(String parentPoolName, String localPoolName, String idKey)
 547             throws ReadFailedException, IdManagerException {
 548         String idLatchKey = idUtils.getUniqueKey(parentPoolName, idKey);
 549         LOG.debug("Releasing ID {} from pool {}", idKey, localPoolName);
 550         CountDownLatch latch = idUtils.getReleaseIdLatch(idLatchKey);
 551         if (latch != null) {
 552             try {
 553                 if (!latch.await(10, TimeUnit.SECONDS)) {
 554                     LOG.warn("Timed out while releasing id {} from id pool {}", idKey, parentPoolName);
 555                 }
 556             } catch (InterruptedException ignored) {
 557                 LOG.warn("Thread interrupted while releasing id {} from id pool {}", idKey, parentPoolName);
 558             } finally {
 559                 idUtils.removeReleaseIdLatch(idLatchKey);
 560             }
 561         }
 562         localPoolName = localPoolName.intern();
 563         InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier = idUtils.getIdPoolInstance(parentPoolName);
 564         IdPool parentIdPool = singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, parentIdPoolInstanceIdentifier);
 565         List<IdEntries> idEntries = parentIdPool.getIdEntries();
 566         if (idEntries == null) {
 567             throw new IdDoesNotExistException(parentPoolName, idKey);
 568         }
 569         InstanceIdentifier<IdEntries> existingId = idUtils.getIdEntry(parentIdPoolInstanceIdentifier, idKey);
 570         Optional<IdEntries> existingIdEntryObject =
 571                 singleTxDB.syncReadOptional(LogicalDatastoreType.CONFIGURATION, existingId);
 572         if (!existingIdEntryObject.isPresent()) {
 573             LOG.info("Specified Id key {} does not exist in id pool {}", idKey, parentPoolName);
 574             idUtils.unlock(lockManager, idLatchKey);
 575             return;
 576         }
 577         IdEntries existingIdEntry = existingIdEntryObject.get();
 578         List<Long> idValuesList = existingIdEntry.getIdValue();
 579         IdLocalPool localIdPoolCache = localPool.get(parentPoolName);
 580         boolean isRemoved = idEntries.remove(existingIdEntry);
 581         LOG.debug("The entry {} is removed {}", existingIdEntry, isRemoved);
 582         updateDelayedEntriesInLocalCache(idValuesList, parentPoolName, localIdPoolCache);
 583         IdHolderSyncJob poolSyncJob = new IdHolderSyncJob(localPoolName, localIdPoolCache.getReleasedIds(), txRunner,
 584                 idUtils);
 585         jobCoordinator.enqueueJob(localPoolName, poolSyncJob, IdUtils.RETRY_COUNT);
 586         scheduleCleanUpTask(localIdPoolCache, parentPoolName, parentIdPool.getBlockSize());
 587         LOG.debug("Released id ({}, {}) from pool {}", idKey, idValuesList, localPoolName);
 588         // Updating id entries in the parent pool. This will be used for restart scenario
 589         UpdateIdEntryJob job = new UpdateIdEntryJob(parentPoolName, localPoolName, idKey, null, txRunner, idUtils,
 590                         lockManager);
 591         jobCoordinator.enqueueJob(parentPoolName, job, IdUtils.RETRY_COUNT);
 592     }
 593
 594     private void scheduleCleanUpTask(final IdLocalPool localIdPoolCache,
 595             final String parentPoolName, final int blockSize) {
 596         TimerTask scheduledTask = new TimerTask() {
 597             @Override
 598             public void run() {
 599                 CleanUpJob job =
 600                         new CleanUpJob(localIdPoolCache, txRunner, broker, parentPoolName, blockSize, lockManager,
 601                                 idUtils, jobCoordinator);
 602                 jobCoordinator.enqueueJob(localIdPoolCache.getPoolName(), job, IdUtils.RETRY_COUNT);
 603             }
 604         };
 605         cleanJobTimer.schedule(scheduledTask, IdUtils.DEFAULT_DELAY_TIME * 1000);
 606     }
 607
 608     private IdPool createGlobalPool(TypedReadWriteTransaction<Configuration> confTx, String poolName, long low,
 609             long high, long blockSize) throws IdManagerException {
 610         IdPool idPool;
 611         InstanceIdentifier<IdPool> idPoolInstanceIdentifier = idUtils.getIdPoolInstance(poolName);
 612         try {
 613             Optional<IdPool> existingIdPool = confTx.read(idPoolInstanceIdentifier).get();
 614             if (!existingIdPool.isPresent()) {
 615                 if (LOG.isDebugEnabled()) {
 616                     LOG.debug("Creating new global pool {}", poolName);
 617                 }
 618                 idPool = idUtils.createGlobalPool(poolName, low, high, blockSize);
 619                 confTx.put(idPoolInstanceIdentifier, idPool, CREATE_MISSING_PARENTS);
 620             } else {
 621                 idPool = existingIdPool.get();
 622                 if (LOG.isDebugEnabled()) {
 623                     LOG.debug("GlobalPool exists {}", idPool);
 624                 }
 625             }
 626             return idPool;
 627         } catch (ExecutionException | InterruptedException e) {
 628             throw new IdManagerException("Error retrieving the existing id pool for " + poolName, e);
 629         }
 630     }
 631
 632     private IdLocalPool createLocalPool(TypedWriteTransaction<Configuration> confTx, String localPoolName,
 633             IdPool idPool)
 634             throws OperationFailedException, IdManagerException {
 635         localPoolName = localPoolName.intern();
 636         IdLocalPool idLocalPool = new IdLocalPool(idUtils, localPoolName);
 637         allocateIdBlockFromParentPool(idLocalPool, idPool, confTx);
 638         String parentPool = idPool.getPoolName();
 639         localPool.put(parentPool, idLocalPool);
 640         LocalPoolCreateJob job = new LocalPoolCreateJob(idLocalPool, txRunner, idPool.getPoolName(),
 641                 idPool.getBlockSize(), idUtils);
 642         jobCoordinator.enqueueJob(localPoolName, job, IdUtils.RETRY_COUNT);
 643         return idLocalPool;
 644     }
 645
 646     private void deletePool(String poolName) {
 647         LocalPoolDeleteJob job = new LocalPoolDeleteJob(poolName, txRunner, idUtils);
 648         jobCoordinator.enqueueJob(poolName, job, IdUtils.RETRY_COUNT);
 649     }
 650
 651     public void poolDeleted(String parentPoolName, String poolName) {
 652         IdLocalPool idLocalPool = localPool.get(parentPoolName);
 653         if (idLocalPool != null) {
 654             if (idLocalPool.getPoolName().equals(poolName)) {
 655                 localPool.remove(parentPoolName);
 656             }
 657         }
 658     }
 659
 660     private void updateDelayedEntriesInLocalCache(List<Long> idsList, String parentPoolName,
 661             IdLocalPool localPoolCache) {
 662         for (long idValue : idsList) {
 663             localPoolCache.getReleasedIds().addId(idValue);
 664         }
 665         localPool.put(parentPoolName, localPoolCache);
 666     }
 667
 668     private List<Long> checkForIdInIdEntries(String parentPoolName, String idKey, String uniqueIdKey,
 669             CompletableFuture<List<Long>> futureIdValues, boolean hasExistingFutureIdValues)
 670             throws IdManagerException, ReadFailedException {
 671         InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier = idUtils.getIdPoolInstance(parentPoolName);
 672         InstanceIdentifier<IdEntries> existingId = idUtils.getIdEntry(parentIdPoolInstanceIdentifier, idKey);
 673         idUtils.lock(lockManager, uniqueIdKey);
 674         List<Long> newIdValuesList = new ArrayList<>();
 675         Optional<IdEntries> existingIdEntry =
 676                 singleTxDB.syncReadOptional(LogicalDatastoreType.CONFIGURATION, existingId);
 677         if (existingIdEntry.isPresent()) {
 678             newIdValuesList = existingIdEntry.get().getIdValue();
 679             LOG.debug("Existing ids {} for the key {} ", newIdValuesList, idKey);
 680             // Inform other waiting threads about this new value.
 681             futureIdValues.complete(newIdValuesList);
 682             // This is to avoid stale entries in the map. If this thread had populated the map,
 683             // then the entry should be removed.
 684             if (!hasExistingFutureIdValues) {
 685                 idUtils.removeAllocatedIds(uniqueIdKey);
 686             }
 687             idUtils.unlock(lockManager, uniqueIdKey);
 688             return newIdValuesList;
 689         }
 690         return newIdValuesList;
 691     }
 692
 693     private IdLocalPool getOrCreateLocalIdPool(String parentPoolName, String localPoolName) throws IdManagerException {
 694         IdLocalPool localIdPool = localPool.get(parentPoolName);
 695         if (localIdPool == null) {
 696             idUtils.lock(lockManager, parentPoolName);
 697             try {
 698                 // Check if a previous thread that got the cluster-wide lock
 699                 // first, has created the localPool
 700                 if (localPool.get(parentPoolName) == null) {
 701                     try {
 702                         return txRunner.applyWithNewReadWriteTransactionAndSubmit(CONFIGURATION, confTx -> {
 703                             InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier = idUtils
 704                                     .getIdPoolInstance(parentPoolName);
 705                             Optional<IdPool> parentIdPool = confTx.read(parentIdPoolInstanceIdentifier).get();
 706                             if (parentIdPool.isPresent()) {
 707                                 // Return localIdPool
 708                                 return createLocalPool(confTx, localPoolName, parentIdPool.get());
 709                             } else {
 710                                 throw new ExpectedDataObjectNotFoundException(LogicalDatastoreType.CONFIGURATION,
 711                                         parentIdPoolInstanceIdentifier);
 712                             }
 713                         }).get();
 714                     } catch (InterruptedException | ExecutionException e) {
 715                         throw new IdManagerException("Error creating a local id pool", e);
 716                     }
 717                 } else {
 718                     localIdPool = localPool.get(parentPoolName);
 719                 }
 720             } finally {
 721                 idUtils.unlock(lockManager, parentPoolName);
 722             }
 723         }
 724         return localIdPool;
 725     }
 726
 727     private void getRangeOfIds(String parentPoolName, String localPoolName, long size, List<Long> newIdValuesList,
 728             IdLocalPool localIdPool, long newIdValue) throws ReadFailedException, IdManagerException {
 729         InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier1 = idUtils.getIdPoolInstance(parentPoolName);
 730         IdPool parentIdPool = singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, parentIdPoolInstanceIdentifier1);
 731         long totalAvailableIdCount = localIdPool.getAvailableIds().getAvailableIdCount()
 732                 + localIdPool.getReleasedIds().getAvailableIdCount();
 733         AvailableIdsHolderBuilder availableParentIds = idUtils.getAvailableIdsHolderBuilder(parentIdPool);
 734         ReleasedIdsHolderBuilder releasedParentIds = IdUtils.getReleaseIdsHolderBuilder(parentIdPool);
 735         totalAvailableIdCount = totalAvailableIdCount + releasedParentIds.getAvailableIdCount()
 736                 + idUtils.getAvailableIdsCount(availableParentIds);
 737         if (totalAvailableIdCount > size) {
 738             while (size > 0) {
 739                 try {
 740                     newIdValue = getIdFromLocalPoolCache(localIdPool, parentPoolName);
 741                 } catch (IdManagerException e) {
 742                     if (LOG.isDebugEnabled()) {
 743                         LOG.debug("Releasing IDs to pool {}", localPoolName);
 744                     }
 745                     // Releasing the IDs added in newIdValuesList since
 746                     // a null list would be returned now, as the
 747                     // requested size of list IDs exceeds the number of
 748                     // available IDs.
 749                     updateDelayedEntriesInLocalCache(newIdValuesList, parentPoolName, localIdPool);
 750                 }
 751                 newIdValuesList.add(newIdValue);
 752                 size--;
 753             }
 754         } else {
 755             throw new IdManagerException(String.format("Ids exhausted for pool : %s", parentPoolName));
 756         }
 757     }
 758 }