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.genius.infra.Datastore.CONFIGURATION;
  13 import static org.opendaylight.yangtools.yang.binding.CodeHelpers.nonnull;
  14
  15 import com.google.common.util.concurrent.Futures;
  16 import com.google.common.util.concurrent.ListenableFuture;
  17 import com.google.common.util.concurrent.MoreExecutors;
  18 import java.util.ArrayList;
  19 import java.util.Collections;
  20 import java.util.HashMap;
  21 import java.util.LinkedList;
  22 import java.util.List;
  23 import java.util.Map;
  24 import java.util.Objects;
  25 import java.util.Optional;
  26 import java.util.Timer;
  27 import java.util.TimerTask;
  28 import java.util.concurrent.CompletableFuture;
  29 import java.util.concurrent.ConcurrentHashMap;
  30 import java.util.concurrent.ConcurrentMap;
  31 import java.util.concurrent.CountDownLatch;
  32 import java.util.concurrent.ExecutionException;
  33 import java.util.concurrent.TimeUnit;
  34 import java.util.stream.Collectors;
  35 import javax.annotation.PostConstruct;
  36 import javax.annotation.PreDestroy;
  37 import javax.inject.Inject;
  38 import javax.inject.Singleton;
  39 import org.apache.aries.blueprint.annotation.service.Reference;
  40 import org.eclipse.jdt.annotation.Nullable;
  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.genius.mdsalutil.NwConstants;
  57 import org.opendaylight.genius.mdsalutil.interfaces.ShardStatusMonitor;
  58 import org.opendaylight.infrautils.jobcoordinator.JobCoordinator;
  59 import org.opendaylight.mdsal.binding.api.DataBroker;
  60 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  61 import org.opendaylight.mdsal.common.api.ReadFailedException;
  62 import org.opendaylight.serviceutils.tools.rpc.FutureRpcResults;
  63 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdInput;
  64 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdOutput;
  65 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdOutputBuilder;
  66 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdRangeInput;
  67 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdRangeOutput;
  68 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.AllocateIdRangeOutputBuilder;
  69 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolInput;
  70 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolOutput;
  71 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.CreateIdPoolOutputBuilder;
  72 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.DeleteIdPoolInput;
  73 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.DeleteIdPoolOutput;
  74 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdManagerService;
  75 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.IdPools;
  76 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdInput;
  77 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdOutput;
  78 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.ReleaseIdOutputBuilder;
  79 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.IdPool;
  80 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.IdPoolBuilder;
  81 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.IdPoolKey;
  82 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.AvailableIdsHolder;
  83 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.AvailableIdsHolderBuilder;
  84 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.ChildPools;
  85 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.ChildPoolsKey;
  86 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.IdEntries;
  87 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.IdEntriesKey;
  88 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.ReleasedIdsHolder;
  89 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.id.pools.id.pool.ReleasedIdsHolderBuilder;
  90 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.idmanager.rev160406.released.ids.DelayedIdEntries;
  91 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.lockmanager.rev160413.LockManagerService;
  92 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  93 import org.opendaylight.yangtools.yang.common.OperationFailedException;
  94 import org.opendaylight.yangtools.yang.common.RpcResult;
  95 import org.opendaylight.yangtools.yang.common.Uint32;
  96 import org.slf4j.Logger;
  97 import org.slf4j.LoggerFactory;
  98
  99 @Singleton
 100 public class IdManager implements IdManagerService, IdManagerMonitor {
 101
 102     private static final Logger LOG = LoggerFactory.getLogger(IdManager.class);
 103     private static final long DEFAULT_IDLE_TIME = 24 * 60 * 60;
 104
 105     private final DataBroker broker;
 106     private final ManagedNewTransactionRunner txRunner;
 107     private final SingleTransactionDataBroker singleTxDB;
 108     private final LockManagerService lockManager;
 109     private final IdUtils idUtils;
 110     private final JobCoordinator jobCoordinator;
 111
 112     private final ConcurrentMap<String, IdLocalPool> localPool;
 113     private final Timer cleanJobTimer = new Timer();
 114
 115     @Inject
 116     public IdManager(DataBroker db, LockManagerService lockManager, IdUtils idUtils,
 117                      @Reference DataImportBootReady dataImportBootReady,
 118                      @Reference JobCoordinator jobCoordinator, @Reference ShardStatusMonitor shardStatusMonitor)
 119                     throws ReadFailedException, InterruptedException {
 120         this.broker = db;
 121         this.txRunner = new ManagedNewTransactionRunnerImpl(db);
 122         this.singleTxDB = new SingleTransactionDataBroker(db);
 123         this.lockManager = lockManager;
 124         this.idUtils = idUtils;
 125         this.jobCoordinator = jobCoordinator;
 126
 127         // NB: We do not "use" the DataImportBootReady, but it's presence in the OSGi
 128         // Service Registry is the required "signal" that the Daexim "import on boot"
 129         // has fully completed (which we want to wait for).  Therefore, making this
 130         // dependent on that defers the Blueprint initialization, as we'd like to,
 131         // so that we do not start giving out new IDs before an import went in.
 132         // Thus, please DO NOT remove the DataImportBootReady argument, even if
 133         // it appears to be (is) un-used from a Java code PoV!
 134
 135         this.localPool = new ConcurrentHashMap<>();
 136         boolean isDatastoreAvailable = false;
 137         int retryCount = 0;
 138         int totalRetry = 1000;
 139         try {
 140             while (retryCount < totalRetry) {
 141                 isDatastoreAvailable = shardStatusMonitor.getShardStatus(NwConstants.IdManagerShards.getShardList());
 142                 if (isDatastoreAvailable) {
 143                     LOG.info("IDManager is UP");
 144                     populateCache();
 145                     break;
 146                 }
 147                 LOG.error("IdManager: retrying shard status check for the {} time, pending retries {}",
 148                         ++retryCount, totalRetry - retryCount);
 149                 Thread.sleep(2000);
 150             }
 151         } catch (InterruptedException e) {
 152             LOG.error("IDManager is DOWN, shard status check failed");
 153         }
 154
 155         if (!isDatastoreAvailable) {
 156             LOG.error("IDManager is DOWN, as shards were not available at bundle bringup");
 157         }
 158     }
 159
 160     @Override
 161     public Map<String, String> getLocalPoolsDetails() {
 162         Map<String, String> map = new HashMap<>();
 163         localPool.forEach((key, value) -> map.put(key, value.toString()));
 164         return map;
 165     }
 166
 167     @PostConstruct
 168     public void start() {
 169         LOG.info("{} start", getClass().getSimpleName());
 170     }
 171
 172     @PreDestroy
 173     public void close() {
 174         cleanJobTimer.cancel();
 175
 176         LOG.info("{} close", getClass().getSimpleName());
 177     }
 178
 179     private void populateCache() throws InterruptedException {
 180         // If IP changes during reboot, then there will be orphaned child pools.
 181         InstanceIdentifier<IdPools> idPoolsInstance = idUtils.getIdPools();
 182         Optional<IdPools> idPoolsOptional;
 183         while (true) {
 184             try {
 185                 idPoolsOptional = singleTxDB.syncReadOptional(LogicalDatastoreType.CONFIGURATION, idPoolsInstance);
 186                 break;
 187             } catch (ExecutionException e) {
 188                 LOG.error("Failed to read the id pools due to error. Retrying again...", e);
 189             }
 190             Thread.sleep(2000);
 191         }
 192         if (!idPoolsOptional.isPresent()) {
 193             return;
 194         }
 195         idPoolsOptional.get().nonnullIdPool().values()
 196                 .stream()
 197                 .filter(idPool -> idPool.getParentPoolName() != null
 198                         && !idPool.getParentPoolName().isEmpty()
 199                         && idUtils.getLocalPoolName(idPool.getParentPoolName())
 200                                 .equals(idPool.getPoolName()))
 201                 .forEach(
 202                     idPool -> updateLocalIdPoolCache(idPool,
 203                         idPool.getParentPoolName()));
 204     }
 205
 206     public boolean updateLocalIdPoolCache(IdPool idPool, String parentPoolName) {
 207         AvailableIdsHolder availableIdsHolder = idPool.getAvailableIdsHolder();
 208         AvailableIdHolder availableIdHolder = new AvailableIdHolder(idUtils, availableIdsHolder.getStart().toJava(),
 209                 availableIdsHolder.getEnd().toJava());
 210         availableIdHolder.setCur(availableIdsHolder.getCursor());
 211         ReleasedIdsHolder releasedIdsHolder = idPool.getReleasedIdsHolder();
 212         ReleasedIdHolder releasedIdHolder = new ReleasedIdHolder(idUtils,
 213                                                         releasedIdsHolder.getDelayedTimeSec().toJava());
 214         releasedIdHolder.setAvailableIdCount(releasedIdsHolder.getAvailableIdCount().toJava());
 215         List<DelayedIdEntry> delayedIdEntryInCache = releasedIdsHolder.nonnullDelayedIdEntries()
 216                 .stream()
 217                 .map(delayedIdEntry -> new DelayedIdEntry(delayedIdEntry
 218                         .getId().toJava(), delayedIdEntry.getReadyTimeSec().toJava()))
 219                 .sorted(comparing(DelayedIdEntry::getReadyTimeSec))
 220                 .collect(toCollection(ArrayList::new));
 221
 222         releasedIdHolder.replaceDelayedEntries(delayedIdEntryInCache);
 223
 224         IdLocalPool idLocalPool = new IdLocalPool(idUtils, idPool.getPoolName());
 225         idLocalPool.setAvailableIds(availableIdHolder);
 226         idLocalPool.setReleasedIds(releasedIdHolder);
 227         localPool.put(parentPoolName, idLocalPool);
 228         if (LOG.isDebugEnabled()) {
 229             LOG.debug("Populating cache for {} with {}", idLocalPool.getPoolName(), idLocalPool);
 230         }
 231         return true;
 232     }
 233
 234     @Override
 235     public ListenableFuture<RpcResult<CreateIdPoolOutput>> createIdPool(CreateIdPoolInput input) {
 236         LOG.info("createIdPool called with input {}", input);
 237         long low = input.getLow().toJava();
 238         long high = input.getHigh().toJava();
 239         long blockSize = idUtils.computeBlockSize(low, high);
 240         return FutureRpcResults.fromListenableFuture(LOG, "createIdPool", input, () -> {
 241             String poolName = input.getPoolName().intern();
 242             try {
 243                 idUtils.lock(lockManager, poolName);
 244                 return Futures.transform(txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION, confTx -> {
 245                     IdPool idPool = createGlobalPool(confTx, poolName, low, high, blockSize);
 246                     String localPoolName = idUtils.getLocalPoolName(poolName);
 247                     IdLocalPool idLocalPool = localPool.get(poolName);
 248                     if (idLocalPool == null) {
 249                         createLocalPool(confTx, localPoolName, idPool);
 250                         idUtils.updateChildPool(confTx, idPool.getPoolName(), localPoolName);
 251                     }
 252                 }), unused -> new CreateIdPoolOutputBuilder().build(), MoreExecutors.directExecutor());
 253             } finally {
 254                 idUtils.unlock(lockManager, poolName);
 255             }
 256         }).build();
 257     }
 258
 259     @Override
 260     public ListenableFuture<RpcResult<AllocateIdOutput>> allocateId(AllocateIdInput input) {
 261         String idKey = input.getIdKey();
 262         String poolName = input.getPoolName();
 263         return FutureRpcResults.fromBuilder(LOG, "allocateId", input, () -> {
 264             String localPoolName = idUtils.getLocalPoolName(poolName);
 265             // allocateIdFromLocalPool method returns a list of IDs with one element. This element is obtained by get(0)
 266             long newIdValue = allocateIdFromLocalPool(poolName, localPoolName, idKey, 1).get(0).toJava();
 267             return new AllocateIdOutputBuilder().setIdValue(newIdValue);
 268         }).onFailure(e -> completeExceptionallyIfPresent(poolName, idKey, e)).build();
 269     }
 270
 271     private void completeExceptionallyIfPresent(String poolName, String idKey, Throwable exception) {
 272         CompletableFuture<List<Uint32>> completableFuture =
 273                 idUtils.removeAllocatedIds(idUtils.getUniqueKey(poolName, idKey));
 274         if (completableFuture != null) {
 275             completableFuture.completeExceptionally(exception);
 276         }
 277     }
 278
 279     @Override
 280     public ListenableFuture<RpcResult<AllocateIdRangeOutput>> allocateIdRange(AllocateIdRangeInput input) {
 281         String idKey = input.getIdKey();
 282         String poolName = input.getPoolName();
 283         long size = input.getSize().toJava();
 284         String localPoolName = idUtils.getLocalPoolName(poolName);
 285         AllocateIdRangeOutputBuilder output = new AllocateIdRangeOutputBuilder();
 286         return FutureRpcResults.fromBuilder(LOG, "allocateIdRange", input, () -> {
 287             List<Uint32> newIdValuesList = allocateIdFromLocalPool(poolName, localPoolName, idKey, size);
 288             Collections.sort(newIdValuesList);
 289             output.setIdValues(newIdValuesList);
 290             return output;
 291         }).onFailure(e -> completeExceptionallyIfPresent(poolName, idKey, e)).build();
 292     }
 293
 294     @Override
 295     public ListenableFuture<RpcResult<DeleteIdPoolOutput>> deleteIdPool(DeleteIdPoolInput input) {
 296         return FutureRpcResults.fromListenableFuture(LOG, "deleteIdPool", input, () -> {
 297             String poolName = input.getPoolName().intern();
 298             InstanceIdentifier<IdPool> idPoolToBeDeleted = idUtils.getIdPoolInstance(poolName);
 299             synchronized (poolName) {
 300                 IdPool idPool = singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, idPoolToBeDeleted);
 301                 //List<ChildPools> childPoolList = idPool.getChildPools();
 302
 303
 304                 @Nullable Map<ChildPoolsKey, ChildPools> childPoolList = idPool.getChildPools();
 305                 if (childPoolList != null) {
 306                     childPoolList.forEach((childPool, childPools) -> {
 307                         deletePool(childPool.getChildPoolName());
 308                     });
 309                 }
 310                 singleTxDB.syncDelete(LogicalDatastoreType.CONFIGURATION, idPoolToBeDeleted);
 311             }
 312             // TODO return the Future from a TBD asyncDelete instead.. BUT check that all callers @CheckReturnValue
 313             return Futures.immediateFuture((DeleteIdPoolOutput) null);
 314         }).build();
 315     }
 316
 317     @Override
 318     public ListenableFuture<RpcResult<ReleaseIdOutput>> releaseId(ReleaseIdInput input) {
 319         String poolName = input.getPoolName();
 320         String idKey = input.getIdKey();
 321         String uniqueKey = idUtils.getUniqueKey(poolName, idKey);
 322         return FutureRpcResults.fromBuilder(LOG, "releaseId", input, () -> {
 323             idUtils.lock(lockManager, uniqueKey);
 324             return releaseIdFromLocalPool(poolName, idUtils.getLocalPoolName(poolName), idKey);
 325         }).onFailureLogLevel(FutureRpcResults.LogLevel.NONE)
 326                 .onFailure(e -> {
 327                     if (e instanceof IdDoesNotExistException) {
 328                         // Do not log full stack trace in case ID does not exist
 329                         LOG.error("RPC releaseId() failed due to IdDoesNotExistException; input = {}", input);
 330                     } else {
 331                         // But for all other cases do:
 332                         LOG.error("RPC releaseId() failed; input = {}", input, e);
 333                     }
 334                     idUtils.unlock(lockManager, uniqueKey);
 335                 }).build();
 336     }
 337
 338     private List<Uint32> allocateIdFromLocalPool(String parentPoolName, String localPoolName,
 339             String idKey, long size) throws OperationFailedException, IdManagerException, ExecutionException,
 340             InterruptedException {
 341         LOG.debug("Allocating id from local pool {}. Parent pool {}. Idkey {}", localPoolName, parentPoolName, idKey);
 342         String uniqueIdKey = idUtils.getUniqueKey(parentPoolName, idKey);
 343         CompletableFuture<List<Uint32>> futureIdValues = new CompletableFuture<>();
 344         CompletableFuture<List<Uint32>> existingFutureIdValue =
 345                 idUtils.putAllocatedIdsIfAbsent(uniqueIdKey, futureIdValues);
 346         if (existingFutureIdValue != null) {
 347             try {
 348                 return existingFutureIdValue.get();
 349             } catch (InterruptedException | ExecutionException e) {
 350                 LOG.warn("Could not obtain id from existing futureIdValue for idKey {} and pool {}.",
 351                         idKey, parentPoolName);
 352                 throw new IdManagerException(e.getMessage(), e);
 353             }
 354         }
 355         try {
 356             List<Uint32> newIdValuesList = checkForIdInIdEntries(parentPoolName, idKey, uniqueIdKey, futureIdValues,
 357                     false);
 358             if (!newIdValuesList.isEmpty()) {
 359                 return newIdValuesList;
 360             }
 361             //This get will not help in concurrent reads. Hence the same read needs to be done again.
 362             IdLocalPool localIdPool = getOrCreateLocalIdPool(parentPoolName, localPoolName);
 363             LOG.debug("Got pool {}", localIdPool);
 364             long newIdValue = -1;
 365             localPoolName = localPoolName.intern();
 366             if (size == 1) {
 367                 newIdValue = getIdFromLocalPoolCache(localIdPool, parentPoolName);
 368                 newIdValuesList.add(Uint32.valueOf(newIdValue));
 369             } else {
 370                 getRangeOfIds(parentPoolName, localPoolName, size, newIdValuesList, localIdPool, newIdValue);
 371             }
 372             LOG.debug("The newIdValues {} for the idKey {}", newIdValuesList, idKey);
 373             idUtils.putReleaseIdLatch(uniqueIdKey, new CountDownLatch(1));
 374             UpdateIdEntryJob job = new UpdateIdEntryJob(parentPoolName, localPoolName, idKey, newIdValuesList, txRunner,
 375                     idUtils, lockManager);
 376             jobCoordinator.enqueueJob(parentPoolName, job, IdUtils.RETRY_COUNT);
 377             futureIdValues.complete(newIdValuesList);
 378             return newIdValuesList;
 379         } catch (OperationFailedException | IdManagerException e) {
 380             idUtils.unlock(lockManager, uniqueIdKey);
 381             throw e;
 382         }
 383     }
 384
 385     private Long getIdFromLocalPoolCache(IdLocalPool localIdPool, String parentPoolName)
 386             throws IdManagerException {
 387         while (true) {
 388             IdHolder availableIds = localIdPool.getAvailableIds();
 389             if (availableIds != null) {
 390                 Optional<Long> availableId = availableIds.allocateId();
 391                 if (availableId.isPresent()) {
 392                     IdHolderSyncJob poolSyncJob =
 393                             new IdHolderSyncJob(localIdPool.getPoolName(), localIdPool.getAvailableIds(), txRunner,
 394                                     idUtils);
 395                     jobCoordinator.enqueueJob(localIdPool.getPoolName(), poolSyncJob, IdUtils.RETRY_COUNT);
 396                     return availableId.get();
 397                 }
 398             }
 399             IdHolder releasedIds = localIdPool.getReleasedIds();
 400             Optional<Long> releasedId = releasedIds.allocateId();
 401             if (releasedId.isPresent()) {
 402                 IdHolderSyncJob poolSyncJob =
 403                         new IdHolderSyncJob(localIdPool.getPoolName(), localIdPool.getReleasedIds(), txRunner,
 404                                 idUtils);
 405                 jobCoordinator.enqueueJob(localIdPool.getPoolName(), poolSyncJob, IdUtils.RETRY_COUNT);
 406                 return releasedId.get();
 407             }
 408             long idCount = getIdBlockFromParentPool(parentPoolName, localIdPool);
 409             if (idCount <= 0) {
 410                 if (LOG.isDebugEnabled()) {
 411                     LOG.debug("Unable to allocate Id block from global pool {}", parentPoolName);
 412                 }
 413                 throw new IdManagerException(String.format("Ids exhausted for pool : %s", parentPoolName));
 414             }
 415         }
 416     }
 417
 418     /**
 419      * Changes made to availableIds and releasedIds will not be persisted to the datastore.
 420      */
 421     private long getIdBlockFromParentPool(String parentPoolName, IdLocalPool localIdPool)
 422             throws IdManagerException {
 423         if (LOG.isDebugEnabled()) {
 424             LOG.debug("Allocating block of id from parent pool {}", parentPoolName);
 425         }
 426         InstanceIdentifier<IdPool> idPoolInstanceIdentifier = idUtils.getIdPoolInstance(parentPoolName);
 427         parentPoolName = parentPoolName.intern();
 428         idUtils.lock(lockManager, parentPoolName);
 429         try {
 430             // Check if the childpool already got id block.
 431             long availableIdCount =
 432                     localIdPool.getAvailableIds().getAvailableIdCount()
 433                             + localIdPool.getReleasedIds().getAvailableIdCount();
 434             if (availableIdCount > 0) {
 435                 return availableIdCount;
 436             }
 437             return txRunner.applyWithNewReadWriteTransactionAndSubmit(CONFIGURATION, confTx -> {
 438                 Optional<IdPool> parentIdPool = confTx.read(idPoolInstanceIdentifier).get();
 439                 if (parentIdPool.isPresent()) {
 440                     return allocateIdBlockFromParentPool(localIdPool, parentIdPool.get(), confTx);
 441                 } else {
 442                     throw new ExpectedDataObjectNotFoundException(LogicalDatastoreType.CONFIGURATION,
 443                             idPoolInstanceIdentifier);
 444                 }
 445             }).get();
 446         } catch (InterruptedException | ExecutionException e) {
 447             throw new IdManagerException("Error getting id block from parent pool", e);
 448         } finally {
 449             idUtils.unlock(lockManager, parentPoolName);
 450         }
 451     }
 452
 453     private long allocateIdBlockFromParentPool(IdLocalPool localPoolCache, IdPool parentIdPool,
 454             TypedWriteTransaction<Configuration> confTx)
 455             throws OperationFailedException, IdManagerException {
 456
 457         long idCount = allocateIdBlockFromAvailableIdsHolder(localPoolCache, parentIdPool, confTx);
 458         if (idCount > 0) {
 459             return idCount;
 460         }
 461
 462         ReleasedIdsHolderBuilder releasedIdsBuilderParent = IdUtils.getReleaseIdsHolderBuilder(parentIdPool);
 463         final List<DelayedIdEntries> delayedEntries = releasedIdsBuilderParent.getDelayedIdEntries();
 464         if (delayedEntries != null) {
 465             releasedIdsBuilderParent.setDelayedIdEntries(new ArrayList<>(delayedEntries));
 466         }
 467
 468         while (true) {
 469             idCount = allocateIdBlockFromReleasedIdsHolder(localPoolCache, releasedIdsBuilderParent, parentIdPool,
 470                     confTx);
 471             if (idCount > 0) {
 472                 return idCount;
 473             }
 474             idCount = getIdsFromOtherChildPools(releasedIdsBuilderParent, parentIdPool);
 475             if (idCount <= 0) {
 476                 if (LOG.isDebugEnabled()) {
 477                     LOG.debug("Unable to allocate Id block from global pool");
 478                 }
 479                 throw new IdManagerException(String.format("Ids exhausted for pool : %s", parentIdPool.getPoolName()));
 480             }
 481
 482             idCount = allocateIdBlockFromAvailableIdsHolder(localPoolCache, parentIdPool, confTx);
 483             if (idCount > 0) {
 484                 return idCount;
 485             }
 486         }
 487     }
 488
 489     private long getIdsFromOtherChildPools(ReleasedIdsHolderBuilder releasedIdsBuilderParent, IdPool parentIdPool)
 490             throws OperationFailedException {
 491         @Nullable Map<ChildPoolsKey, ChildPools> childPoolsMap = parentIdPool.nonnullChildPools();
 492         // Sorting the child pools on last accessed time so that the pool that
 493         // was not accessed for a long time comes first.
 494
 495         List<ChildPools> list = childPoolsMap.values().stream().collect(Collectors.toList());
 496         list.sort(comparing(ChildPools::getLastAccessTime));
 497
 498         long currentTime = System.currentTimeMillis() / 1000;
 499         for (ChildPools childPools : childPoolsMap.values()) {
 500             if (childPools.getLastAccessTime().toJava() + DEFAULT_IDLE_TIME > currentTime) {
 501                 break;
 502             }
 503             if (!Objects.equals(childPools.getChildPoolName(), idUtils.getLocalPoolName(parentIdPool.getPoolName()))) {
 504                 InstanceIdentifier<IdPool> idPoolInstanceIdentifier = idUtils
 505                         .getIdPoolInstance(childPools.getChildPoolName());
 506                 IdPool otherChildPool =
 507                         singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, idPoolInstanceIdentifier);
 508                 ReleasedIdsHolderBuilder releasedIds = IdUtils.getReleaseIdsHolderBuilder(otherChildPool);
 509
 510                 List<DelayedIdEntries> delayedIdEntriesChild = releasedIds.getDelayedIdEntries();
 511                 List<DelayedIdEntries> delayedIdEntriesParent = releasedIdsBuilderParent.getDelayedIdEntries();
 512                 if (delayedIdEntriesParent == null) {
 513                     delayedIdEntriesParent = new LinkedList<>();
 514                 }
 515                 delayedIdEntriesParent.addAll(delayedIdEntriesChild);
 516                 delayedIdEntriesChild.clear();
 517
 518                 AvailableIdsHolderBuilder availableIds = idUtils.getAvailableIdsHolderBuilder(otherChildPool);
 519                 while (idUtils.isIdAvailable(availableIds)) {
 520                     long cursor = availableIds.getCursor() + 1;
 521                     delayedIdEntriesParent.add(idUtils.createDelayedIdEntry(cursor, currentTime));
 522                     availableIds.setCursor(cursor);
 523                 }
 524
 525                 long totalAvailableIdCount = releasedIds.getDelayedIdEntries().size()
 526                         + idUtils.getAvailableIdsCount(availableIds);
 527                 long count = releasedIdsBuilderParent.getAvailableIdCount().toJava() + totalAvailableIdCount;
 528                 releasedIdsBuilderParent.setDelayedIdEntries(delayedIdEntriesParent).setAvailableIdCount(count);
 529                 singleTxDB.syncUpdate(LogicalDatastoreType.CONFIGURATION, idPoolInstanceIdentifier,
 530                         new IdPoolBuilder().withKey(new IdPoolKey(otherChildPool.getPoolName()))
 531                                 .setAvailableIdsHolder(availableIds.build()).setReleasedIdsHolder(releasedIds.build())
 532                                 .build());
 533                 return totalAvailableIdCount;
 534             }
 535         }
 536         return 0;
 537     }
 538
 539     private long allocateIdBlockFromReleasedIdsHolder(IdLocalPool localIdPool,
 540             ReleasedIdsHolderBuilder releasedIdsBuilderParent, IdPool parentIdPool,
 541             TypedWriteTransaction<Configuration> confTx) {
 542         if (releasedIdsBuilderParent.getAvailableIdCount().toJava() == 0) {
 543             LOG.debug("Ids unavailable in releasedIds of parent pool {}", parentIdPool);
 544             return 0;
 545         }
 546         List<DelayedIdEntries> delayedIdEntriesParent = releasedIdsBuilderParent.getDelayedIdEntries();
 547         int idCount = Math.min(delayedIdEntriesParent.size(), parentIdPool.getBlockSize().toJava());
 548         List<DelayedIdEntries> idEntriesToBeRemoved = delayedIdEntriesParent.subList(0, idCount);
 549         ReleasedIdHolder releasedIds = (ReleasedIdHolder) localIdPool.getReleasedIds();
 550         List<DelayedIdEntry> delayedIdEntriesLocalCache = releasedIds.getDelayedEntries();
 551         List<DelayedIdEntry> delayedIdEntriesFromParentPool = idEntriesToBeRemoved
 552                 .stream()
 553                 .map(delayedIdEntry -> new DelayedIdEntry(delayedIdEntry
 554                         .getId().toJava(), delayedIdEntry.getReadyTimeSec().toJava()))
 555                 .sorted(comparing(DelayedIdEntry::getReadyTimeSec))
 556                 .collect(toCollection(ArrayList::new));
 557         delayedIdEntriesFromParentPool.addAll(delayedIdEntriesLocalCache);
 558         releasedIds.replaceDelayedEntries(delayedIdEntriesFromParentPool);
 559         releasedIds.setAvailableIdCount(releasedIds.getAvailableIdCount() + idCount);
 560         localIdPool.setReleasedIds(releasedIds);
 561         delayedIdEntriesParent.removeAll(idEntriesToBeRemoved);
 562         releasedIdsBuilderParent.setDelayedIdEntries(delayedIdEntriesParent);
 563         InstanceIdentifier<ReleasedIdsHolder> releasedIdsHolderInstanceIdentifier = InstanceIdentifier
 564                 .builder(IdPools.class).child(IdPool.class,
 565                         new IdPoolKey(parentIdPool.getPoolName())).child(ReleasedIdsHolder.class).build();
 566         releasedIdsBuilderParent.setAvailableIdCount(releasedIdsBuilderParent.getAvailableIdCount().toJava() - idCount);
 567         LOG.debug("Allocated {} ids from releasedIds of parent pool {}", idCount, parentIdPool);
 568         confTx.mergeParentStructureMerge(releasedIdsHolderInstanceIdentifier, releasedIdsBuilderParent.build());
 569         return idCount;
 570     }
 571
 572     private long allocateIdBlockFromAvailableIdsHolder(IdLocalPool localIdPool, IdPool parentIdPool,
 573             TypedWriteTransaction<Configuration> confTx) {
 574         long idCount = 0;
 575         AvailableIdsHolderBuilder availableIdsBuilderParent = idUtils.getAvailableIdsHolderBuilder(parentIdPool);
 576         long end = availableIdsBuilderParent.getEnd().toJava();
 577         long cur = availableIdsBuilderParent.getCursor();
 578         if (!idUtils.isIdAvailable(availableIdsBuilderParent)) {
 579             if (LOG.isDebugEnabled()) {
 580                 LOG.debug("Ids exhausted in parent pool {}", parentIdPool);
 581             }
 582             return idCount;
 583         }
 584         // Update availableIdsHolder of Local Pool
 585         idCount = Math.min(end - cur, parentIdPool.getBlockSize().toJava());
 586         AvailableIdHolder availableIds = new AvailableIdHolder(idUtils, cur + 1, cur + idCount);
 587         localIdPool.setAvailableIds(availableIds);
 588         // Update availableIdsHolder of Global Pool
 589         InstanceIdentifier<AvailableIdsHolder> availableIdsHolderInstanceIdentifier = InstanceIdentifier
 590                 .builder(IdPools.class).child(IdPool.class,
 591                         new IdPoolKey(parentIdPool.getPoolName())).child(AvailableIdsHolder.class).build();
 592         availableIdsBuilderParent.setCursor(cur + idCount);
 593         if (LOG.isDebugEnabled()) {
 594             LOG.debug("Allocated {} ids from availableIds of global pool {}", idCount, parentIdPool);
 595         }
 596         confTx.mergeParentStructureMerge(availableIdsHolderInstanceIdentifier, availableIdsBuilderParent.build());
 597         return idCount;
 598     }
 599
 600     private ReleaseIdOutputBuilder releaseIdFromLocalPool(String parentPoolName, String localPoolName, String idKey)
 601             throws IdManagerException, ReadFailedException, ExecutionException, InterruptedException {
 602         String idLatchKey = idUtils.getUniqueKey(parentPoolName, idKey);
 603         LOG.debug("Releasing ID {} from pool {}", idKey, localPoolName);
 604         CountDownLatch latch = idUtils.getReleaseIdLatch(idLatchKey);
 605         if (latch != null) {
 606             try {
 607                 if (!latch.await(10, TimeUnit.SECONDS)) {
 608                     LOG.warn("Timed out while releasing id {} from id pool {}", idKey, parentPoolName);
 609                 }
 610             } catch (InterruptedException ignored) {
 611                 LOG.warn("Thread interrupted while releasing id {} from id pool {}", idKey, parentPoolName);
 612             } finally {
 613                 idUtils.removeReleaseIdLatch(idLatchKey);
 614             }
 615         }
 616         localPoolName = localPoolName.intern();
 617         InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier = idUtils.getIdPoolInstance(parentPoolName);
 618         IdPool parentIdPool = singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, parentIdPoolInstanceIdentifier);
 619         @Nullable Map<IdEntriesKey, IdEntries> idEntries = parentIdPool.getIdEntries();
 620         if (idEntries == null) {
 621             throw new IdDoesNotExistException(parentPoolName, idKey);
 622         }
 623         InstanceIdentifier<IdEntries> existingId = idUtils.getIdEntry(parentIdPoolInstanceIdentifier, idKey);
 624         Optional<IdEntries> existingIdEntryObject =
 625                 singleTxDB.syncReadOptional(LogicalDatastoreType.CONFIGURATION, existingId);
 626         if (!existingIdEntryObject.isPresent()) {
 627             LOG.info("Specified Id key {} does not exist in id pool {}", idKey, parentPoolName);
 628             idUtils.unlock(lockManager, idLatchKey);
 629             throw new IdManagerException(String.format("Specified Id key %s does not exist in id pool %s",
 630                     idKey, parentPoolName));
 631         }
 632         IdEntries existingIdEntry = existingIdEntryObject.get();
 633         List<Uint32> idValuesList = nonnull(existingIdEntry.getIdValue());
 634         IdLocalPool localIdPoolCache = localPool.get(parentPoolName);
 635         boolean isRemoved = idEntries.values().contains(existingIdEntry);
 636         LOG.debug("The entry {} is removed {}", existingIdEntry, isRemoved);
 637         updateDelayedEntriesInLocalCache(idValuesList, parentPoolName, localIdPoolCache);
 638         IdHolderSyncJob poolSyncJob = new IdHolderSyncJob(localPoolName, localIdPoolCache.getReleasedIds(), txRunner,
 639                 idUtils);
 640         jobCoordinator.enqueueJob(localPoolName, poolSyncJob, IdUtils.RETRY_COUNT);
 641         scheduleCleanUpTask(localIdPoolCache, parentPoolName, parentIdPool.getBlockSize().toJava());
 642         LOG.debug("Released id ({}, {}) from pool {}", idKey, idValuesList, localPoolName);
 643         // Updating id entries in the parent pool. This will be used for restart scenario
 644         UpdateIdEntryJob job = new UpdateIdEntryJob(parentPoolName, localPoolName, idKey, null, txRunner, idUtils,
 645                         lockManager);
 646         jobCoordinator.enqueueJob(parentPoolName, job, IdUtils.RETRY_COUNT);
 647         return new ReleaseIdOutputBuilder().setIdValues(idValuesList);
 648     }
 649
 650     private void scheduleCleanUpTask(final IdLocalPool localIdPoolCache,
 651             final String parentPoolName, final int blockSize) {
 652         TimerTask scheduledTask = new TimerTask() {
 653             @Override
 654             public void run() {
 655                 CleanUpJob job =
 656                         new CleanUpJob(localIdPoolCache, txRunner, broker, parentPoolName, blockSize, lockManager,
 657                                 idUtils, jobCoordinator);
 658                 jobCoordinator.enqueueJob(localIdPoolCache.getPoolName(), job, IdUtils.RETRY_COUNT);
 659             }
 660         };
 661         cleanJobTimer.schedule(scheduledTask, IdUtils.DEFAULT_DELAY_TIME * 1000);
 662     }
 663
 664     private IdPool createGlobalPool(TypedReadWriteTransaction<Configuration> confTx, String poolName, long low,
 665             long high, long blockSize) throws IdManagerException {
 666         IdPool idPool;
 667         InstanceIdentifier<IdPool> idPoolInstanceIdentifier = idUtils.getIdPoolInstance(poolName);
 668         try {
 669             Optional<IdPool> existingIdPool = confTx.read(idPoolInstanceIdentifier).get();
 670             if (!existingIdPool.isPresent()) {
 671                 if (LOG.isDebugEnabled()) {
 672                     LOG.debug("Creating new global pool {}", poolName);
 673                 }
 674                 idPool = idUtils.createGlobalPool(poolName, low, high, blockSize);
 675                 confTx.mergeParentStructurePut(idPoolInstanceIdentifier, idPool);
 676             } else {
 677                 idPool = existingIdPool.get();
 678                 if (LOG.isDebugEnabled()) {
 679                     LOG.debug("GlobalPool exists {}", idPool);
 680                 }
 681             }
 682             return idPool;
 683         } catch (ExecutionException | InterruptedException e) {
 684             throw new IdManagerException("Error retrieving the existing id pool for " + poolName, e);
 685         }
 686     }
 687
 688     private IdLocalPool createLocalPool(TypedWriteTransaction<Configuration> confTx, String localPoolName,
 689             IdPool idPool)
 690             throws OperationFailedException, IdManagerException {
 691         localPoolName = localPoolName.intern();
 692         IdLocalPool idLocalPool = new IdLocalPool(idUtils, localPoolName);
 693         allocateIdBlockFromParentPool(idLocalPool, idPool, confTx);
 694         String parentPool = idPool.getPoolName();
 695         localPool.put(parentPool, idLocalPool);
 696         LocalPoolCreateJob job = new LocalPoolCreateJob(idLocalPool, txRunner, idPool.getPoolName(),
 697                 idPool.getBlockSize().toJava(), idUtils);
 698         jobCoordinator.enqueueJob(localPoolName, job, IdUtils.RETRY_COUNT);
 699         return idLocalPool;
 700     }
 701
 702     private void deletePool(String poolName) {
 703         LocalPoolDeleteJob job = new LocalPoolDeleteJob(poolName, txRunner, idUtils);
 704         jobCoordinator.enqueueJob(poolName, job, IdUtils.RETRY_COUNT);
 705     }
 706
 707     public void poolDeleted(String parentPoolName, String poolName) {
 708         IdLocalPool idLocalPool = localPool.get(parentPoolName);
 709         if (idLocalPool != null) {
 710             if (idLocalPool.getPoolName().equals(poolName)) {
 711                 localPool.remove(parentPoolName);
 712             }
 713         }
 714     }
 715
 716     private void updateDelayedEntriesInLocalCache(List<Uint32> idsList, String parentPoolName,
 717             IdLocalPool localPoolCache) {
 718         for (Uint32 idValue : idsList) {
 719             localPoolCache.getReleasedIds().addId(idValue.toJava());
 720         }
 721         localPool.put(parentPoolName, localPoolCache);
 722     }
 723
 724     private List<Uint32> checkForIdInIdEntries(String parentPoolName, String idKey, String uniqueIdKey,
 725             CompletableFuture<List<Uint32>> futureIdValues, boolean hasExistingFutureIdValues)
 726             throws IdManagerException, InterruptedException , ExecutionException {
 727         InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier = idUtils.getIdPoolInstance(parentPoolName);
 728         InstanceIdentifier<IdEntries> existingId = idUtils.getIdEntry(parentIdPoolInstanceIdentifier, idKey);
 729         idUtils.lock(lockManager, uniqueIdKey);
 730         List<Uint32> newIdValuesList = new ArrayList<>();
 731         Optional<IdEntries> existingIdEntry =
 732                 singleTxDB.syncReadOptional(LogicalDatastoreType.CONFIGURATION, existingId);
 733         if (existingIdEntry.isPresent()) {
 734             newIdValuesList = existingIdEntry.get().getIdValue();
 735             LOG.debug("Existing ids {} for the key {} ", newIdValuesList, idKey);
 736             // Inform other waiting threads about this new value.
 737             futureIdValues.complete(newIdValuesList);
 738             // This is to avoid stale entries in the map. If this thread had populated the map,
 739             // then the entry should be removed.
 740             if (!hasExistingFutureIdValues) {
 741                 idUtils.removeAllocatedIds(uniqueIdKey);
 742             }
 743             idUtils.unlock(lockManager, uniqueIdKey);
 744             return newIdValuesList;
 745         }
 746         return newIdValuesList;
 747     }
 748
 749     private IdLocalPool getOrCreateLocalIdPool(String parentPoolName, String localPoolName)
 750         throws IdManagerException {
 751         IdLocalPool localIdPool = localPool.get(parentPoolName);
 752         if (localIdPool == null) {
 753             idUtils.lock(lockManager, parentPoolName);
 754             try {
 755                 // Check if a previous thread that got the cluster-wide lock
 756                 // first, has created the localPool
 757                 try {
 758                     InstanceIdentifier<IdPool> childIdPoolInstanceIdentifier = idUtils
 759                             .getIdPoolInstance(localPoolName);
 760                     Optional<IdPool> childIdPoolOpt = singleTxDB.syncReadOptional(LogicalDatastoreType.CONFIGURATION,
 761                             childIdPoolInstanceIdentifier);
 762                     if (childIdPoolOpt.isPresent()) {
 763                         updateLocalIdPoolCache(childIdPoolOpt.get(), parentPoolName);
 764                     }
 765                 }
 766                 catch (ExecutionException | InterruptedException ex) {
 767                     LOG.debug("Failed to read id pool {} due to {}", localPoolName, ex.getMessage());
 768                 }
 769                 if (localPool.get(parentPoolName) == null) {
 770                     try {
 771                         return txRunner.applyWithNewReadWriteTransactionAndSubmit(CONFIGURATION, confTx -> {
 772                             InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier = idUtils
 773                                     .getIdPoolInstance(parentPoolName);
 774                             Optional<IdPool> parentIdPool = confTx.read(parentIdPoolInstanceIdentifier).get();
 775                             if (parentIdPool.isPresent()) {
 776                                 // Return localIdPool
 777                                 return createLocalPool(confTx, localPoolName, parentIdPool.get());
 778                             } else {
 779                                 throw new ExpectedDataObjectNotFoundException(LogicalDatastoreType.CONFIGURATION,
 780                                         parentIdPoolInstanceIdentifier);
 781                             }
 782                         }).get();
 783                     } catch (InterruptedException | ExecutionException e) {
 784                         throw new IdManagerException("Error creating a local id pool", e);
 785                     }
 786                 } else {
 787                     localIdPool = localPool.get(parentPoolName);
 788                 }
 789             } finally {
 790                 idUtils.unlock(lockManager, parentPoolName);
 791             }
 792         }
 793         return localIdPool;
 794     }
 795
 796     private void getRangeOfIds(String parentPoolName, String localPoolName, long size, List<Uint32> newIdValuesList,
 797             IdLocalPool localIdPool, long newIdValue) throws ReadFailedException, IdManagerException {
 798         InstanceIdentifier<IdPool> parentIdPoolInstanceIdentifier1 = idUtils.getIdPoolInstance(parentPoolName);
 799         IdPool parentIdPool = singleTxDB.syncRead(LogicalDatastoreType.CONFIGURATION, parentIdPoolInstanceIdentifier1);
 800         long totalAvailableIdCount = localIdPool.getAvailableIds().getAvailableIdCount()
 801                 + localIdPool.getReleasedIds().getAvailableIdCount();
 802         AvailableIdsHolderBuilder availableParentIds = idUtils.getAvailableIdsHolderBuilder(parentIdPool);
 803         ReleasedIdsHolderBuilder releasedParentIds = IdUtils.getReleaseIdsHolderBuilder(parentIdPool);
 804         totalAvailableIdCount = totalAvailableIdCount + releasedParentIds.getAvailableIdCount().toJava()
 805                 + idUtils.getAvailableIdsCount(availableParentIds);
 806         if (totalAvailableIdCount > size) {
 807             while (size > 0) {
 808                 try {
 809                     newIdValue = getIdFromLocalPoolCache(localIdPool, parentPoolName);
 810                 } catch (IdManagerException e) {
 811                     if (LOG.isDebugEnabled()) {
 812                         LOG.debug("Releasing IDs to pool {}", localPoolName);
 813                     }
 814                     // Releasing the IDs added in newIdValuesList since
 815                     // a null list would be returned now, as the
 816                     // requested size of list IDs exceeds the number of
 817                     // available IDs.
 818                     updateDelayedEntriesInLocalCache(newIdValuesList, parentPoolName, localIdPool);
 819                 }
 820                 newIdValuesList.add(Uint32.valueOf(newIdValue));
 821                 size--;
 822             }
 823         } else {
 824             throw new IdManagerException(String.format("Ids exhausted for pool : %s", parentPoolName));
 825         }
 826     }
 827 }